Abstract

The present invention provides a heat stabilizer for PVC and a preparation method, a modifier, and a use, and provides a tung oil-derived nitrogen-containing zirconium carboxylate heat stabilizer and a tung oil-derived calcium/zinc imidazole carboxylate heat stabilizer, and preparation methods therefor. The tung oil-derived nitrogen-containing zirconium carboxylate and the tung oil-derived calcium/zinc imidazole carboxylate are used as a composite heat stabilizer which is then compounded with an antioxidant 1010, an antioxidant 168, and stearic acid to prepare a modifier containing the tung oil-derived nitrogen-containing zirconium carboxylate composite heat stabilizer. The composite heat stabilizer and the modifier prepared by the present invention have the characteristics of no toxicity, no heavy metal, environmental friendliness and the like, and endow the PVC with excellent initial and long-term thermal stability. The preparation methods of the present invention involve a simple processing and manufacturing process and have low processing costs, exhibit environmental friendliness and no toxicity, and are suitable for industrial mass production and promotion.

IPC Classes  ?

• C07C 233/63 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to carbon atoms of rings other than six-membered aromatic rings having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups
• C08K 5/20 - Carboxylic acid amides
• C08L 27/06 - Homopolymers or copolymers of vinyl chloride
• C07C 231/02 - Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
• C07C 231/12 - Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
• C07D 257/06 - Five-membered rings with nitrogen atoms directly attached to the ring carbon atom
• C07D 249/14 - Nitrogen atoms
• C07D 249/08 - 1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles

Abstract

A two-stage jet device with a stream guide structure, the two-stage jet device comprising a cavity (1) and nozzles (4), wherein an outlet is provided at one end of the cavity (1), and a first gas inlet (2) and a second gas inlet (1-2) are provided at the other end of the cavity (1). The nozzles (4) comprise a first-stage nozzle (4-1) and a second-stage nozzle (4-2), wherein the first-stage nozzle (4-1) is located in a mixing cavity (1-4), and the second-stage nozzle (4-2) can be axially movably mounted in the first-stage nozzle (4-1). The two-stage jet device further comprises guide blades (5), which are respectively provided in the first gas inlet (2) and in a suction cavity (6) of the mixing cavity (1-4), wherein the guide blade (5) in the suction cavity (6) can rotate; and according to the position of the second-stage nozzle (4-2), a control system controls the rotation angle of the guide blade (5) in the suction cavity (6). The two-stage jet device can horizontally move a second nozzle according to the magnitude of the output power of a stack, and also cooperatively control the rotation of a rotating guide blade, so that secondary stream gas enters primary stream gas at an optimal angle.

IPC Classes  ?

• F04F 5/16 - Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
• F04F 5/48 - Control
• H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
• B05B 7/04 - Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge

Abstract

A rapid detection method for ciprofloxacin in meat products based on enzyme-linked up-conversion fluorescence and a potassium titanyl oxalate acid system, which belongs to the field of antibiotic detection technology. The detection method comprises: mixing an enzyme-linked up-conversion nanoparticle solution with an aptamer-connected magnetized polydopamine solution to obtain a fluorescent-ultraviolet dual-signal sensor detection system; and integrating potassium oxalate acid and hydrogen peroxide to collectively establish a ciprofloxacin content detection fluorescence standard curve and colorimetric standard curve, signal values of the ultraviolet absorbance and the fluorescence intensity of a meat product sample liquid are measured, and the ciprofloxacin content in the meat product is calculated according to the fluorescence standard curve and the colorimetric standard curve.

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence
• G01N 21/33 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
• G01N 21/78 - Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour

Abstract

Disclosed in the present invention is a construction method for a control system for a high-speed electric spindle supported by six-pole active magnetic bearings. The method comprises: constructing a transfer learning model by means of a marginal distribution distance between a source domain data set and a target domain data set, training same to obtain a predicted disturbance function, and building the predicted disturbance function in a transfer learning module; using an actual displacement as an input of the transfer learning module so as to obtain a predicted disturbance, and forming an optimized active disturbance rejection controller by using a tracking differentiator, a nonlinear state error feedback control law, a first compensation factor, a second compensation factor, the transfer learning module and an extended state observer jointly; and three optimized active disturbance rejection controllers being connected in series to the front end of a three-degree-of-freedom compound controlled object, and two optimized active disturbance rejection controllers being connected in series to the front end of a two-degree-of-freedom compound controlled object, so as to jointly form a control system. Using active disturbance rejection control based on transfer learning optimization to predict a disturbance and using the optimized extended state observers to perform estimation and compensation for the total system disturbance improve the control performance of the system.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

The present invention provides a floating-type counter-rotating vortex elimination apparatus for a pump station, and a pump station. The floating-type counter-rotating vortex elimination apparatus comprises a floating-type driving disc, a counter-rotating gearbox, a reverse rotating disc, a plane bearing, an elastic element, and a counterweight; the floating-type driving disc floats on a liquid level near the water suction end of a pump station, and is driven to rotate by means of power generated by a vortex; the floating-type driving disc is connected to the reverse rotating disc by means of the counter-rotating gearbox, so that the rotating directions of the reverse rotating disc and the floating-type driving disc are different; the plane bearing is mounted at the bottom of the reverse rotating disc; the plane bearing is connected to the counterweight by means of the elastic element and is used for preventing inclination. The present invention can generate a reaction force to counteract vortexes, and weaken or eliminate free liquid level vortexes, and thus provide more uniform incoming flow for a large water pump.

IPC Classes  ?

• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the like; Balancing
• E02B 8/06 - Spillways; Devices for dissipation of energy, e.g. for reducing eddies
• E03B 5/00 - Use of pumping plants or installations; Layouts thereof

Abstract

The present invention relates to the technical fields of photoelectric communication and photoelectric devices, and discloses a perovskite/silicon heterojunction photodetector and a preparation method therefor. The perovskite/silicon heterojunction photodetector comprises a conductive silicon substrate, a perovskite layer, and electrodes. The perovskite layer is composed of a perovskite body and a zeolitic imidazolate framework material ZIF-67. The method comprises the steps of mixing ZIF-67 powder with a perovskite precursor solute, adding a solvent, stirring to obtain a homogeneous perovskite precursor solution, then preparing a perovskite thin film on a treated conductive silicon substrate by using an anti-solvent spin coating method, carrying out gradient thermal annealing to obtain a high-quality perovskite layer, constructing a perovskite/silicon heterojunction, and finally preparing electrodes on the surface of the perovskite layer to obtain a perovskite/silicon heterojunction photodetector. ZIF-67 is used for carrying out n-type doping on a perovskite, constructing a heterojunction with p-type low-resistance silicon, and accelerating the separation of carriers by utilizing a built-in electric field. In addition, ZIF-67 can regulate and control the growth of thin films, so that the grain boundary and the defect state are reduced, and the non-radiation composite loss of devices is reduced, thereby improving the performance and stability of the devices.

IPC Classes  ?

• H10K 30/10 - Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors

Abstract

Disclosed in the present invention are a two-scale numerical value calculation method for the performance of a sliding bearing with the impact of roughness taken into consideration. The method solves the problem of the calculation accuracy and speed regarding the impact of roughness on lubrication performance of sliding bearings, and overcomes the problem of calculation being inaccurate and unsuitable in conventional methods without taking roughness into consideration. In the present invention, cavitation in sliding bearings is taken into consideration, and a fluid dynamic behavior model is established on the basis of roughness. In order to solve the problem of fluid dynamics in a macroscopic domain, a two-scale normalization method is provided, such that microscale effects are coupled into a macroscopic scale by means of finite difference partial derivatives, and then a response of a fluid dynamic behavior in a microscale domain to roughness is calculated by using the normalization method; and a linearization method is provided to calculate finite difference partial derivatives. The present invention provides a two-scale normalization-based numerical value calculation method for the bearing capacity and friction coefficient of a sliding bearing, thereby providing a more accurate and more universally applicable method for numerical value calculation of the performance of sliding bearings with the impact of roughness taken into consideration.

IPC Classes  ?

• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]

Abstract

Disclosed in the present invention is a vane pump transient process performance optimization design method, comprising: respectively creating an initial design model of a vane pump, an initial design model of an impeller, and a vane pump starting process full-flow-field simulation model, selecting impeller structure parameters as design variables, and on the basis of the initial design models and the vane pump starting process full-flow-field simulation model, performing starting process transient numerical calculation by using CFD simulation software, wherein starting process transient external characteristics comprise a transient lift and transient efficiency; performing data processing on the starting process transient lift and transient efficiency to respectively obtain a weighted average lift and weighted average efficiency; taking the design variables as input parameters, and taking the weighted average lift and the weighted average efficiency as response values; establishing a transient process performance optimization model on the basis of a response surface function; and optimizing vane pump transient process performance by using the established transient process performance optimization model. The vane pump transient process performance optimization design method of the present invention can ensure the calculation accuracy, accelerate the optimization process and shorten the optimization time.

IPC Classes  ?

• G06F 30/17 - Mechanical parametric or variational design
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• F04D 29/24 - Vanes

Abstract

A microfluidic biosensing platform based on up-conversion luminescence, the microfluidic biosensing platform comprising an up-conversion luminescent biosensor, which is used for specifically recognizing EDCs, and a microfluidic chip, which is configured such that the mixing, reaction, separation and measurement of the up-conversion luminescent biosensor and a sample to be subjected to measurement are integrated therein, wherein the microfluidic chip comprises: sample feeding reservoirs, which are used for sample feeding of the up-conversion luminescent biosensor and the sample to be subjected to measurement; an arc-shaped channel, a feeding port of the arc-shaped channel being in communication with both the sample feeding reservoir of the up-conversion luminescent biosensor and the sample feeding reservoir of the sample to be subjected to measurement, and after the up-conversion luminescent biosensor and the sample to be subjected to measurement enter the arc-shaped channel, the arc-shaped channel being configured for the mixing and reaction between the up-conversion luminescent biosensor and the sample to be subjected to measurement; a separation channel (7), which is in communication with a discharge port of the arc-shaped channel and is used for the magnetic separation of the up-conversion luminescent biosensor after the reaction is finished; and a measurement reservoir (8), which is in communication with a discharge port of the separation channel and is used for completing luminescence enhancement quantitative measurement of the EDCs.

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence
• G01N 33/50 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
• B01L 3/00 - Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers

Abstract

The present invention belongs to the field of calculation combining electromagnetic fields and structural mechanics. Disclosed is an electromagnetic force and vibration modeling method for a surface-mounted permanent magnet electric motor. The method comprises: firstly, for different areas in a surface-mounted permanent magnet electric motor, respectively establishing a subdivision network model, a regular magnetic circuit model and a discretized equivalent magnetic source and magnetic conduction hybrid model; next, connecting the models of the areas on the basis of a spatial position relationship of a structural topology, establishing a complete model of a discretized equivalent magnetic network of the electric motor, introducing non-sinusoidal high-frequency current harmonic waves as model input excitation, simultaneously solving a global nonlinear matrix equation, solving a magnetic flux density of a mesh node of an air gap, and calculating an electromagnetic force density of the air gap of the electric motor; then, converting the calculated electromagnetic force density into a concentrated force of a tooth surface of a stator, and obtaining a vibration transfer function on the basis of modal and static displacement features of the stator and a casing of the electric motor; and finally, completing vibration calculation on the basis of the electromagnetic force, which is calculated by means of the discretized equivalent magnetic network, and the vibration transfer function.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A use of umbilical cord mesenchymal stem cell-derived small extracellular vesicles (hucMSC-sEVs) in preparation of a drug for treating type 2 diabetes. Experiments prove that hucMSC-sEVs can effectively reduce the blood glucose of a db/db mouse model, mitigate the pancreatic islet morphology disorder, increase the number of β cells, and remodel pancreatic β cells by reversing β cell apoptosis and dedifferentiation. Hence, hucMSC-sEVs can effectively improve the structure and function of pancreatic islets, reduce the blood glucose level caused by type 2 diabetes, regulate glucose homeostasis, and improve the quality of pancreatic β cells, can be used as a novel drug for treating type 2 diabetes, and is beneficial to clinical popularization and application.

IPC Classes  ?

• A61K 35/28 - Bone marrow; Haematopoietic stem cells; Mesenchymal stem cells of any origin, e.g. adipose-derived stem cells
• A61P 3/10 - Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics

Abstract

The present invention relates to a lift and drag combined hydroelectric generation device, comprising a runner shaft, and a lift runner, a primary drag runner and a secondary drag runner which are coaxially arranged with the runner shaft, the runner shaft being rotatably supported onto a support frame, and the primary drag runner and the secondary drag runner being arranged in series on the runner shaft. A disc generator is located between the primary drag runner and the secondary drag runner and installed on the runner shaft, and the lift runner is located on the peripheries of the primary drag runner and the secondary drag runner and connected onto the runner shaft. Under the action of water flow, the lift runner generates, by means of the lift force of blades thereof, a torque that causes the runner shaft to rotate, and the primary drag runner and the secondary drag runner generate, by means of the lift force of blades thereof, a torque that causes the runner shaft to rotate, so as to together convert water kinetic energy into mechanical energy that causes the disc generator to rotate. A structure that combines a single-stage lift impeller and a two-stage split drag impeller converts kinetic energy of upstream water flow into mechanical energy that drives a generator rotor to rotate, thus having higher power generation efficiency and complete self-starting performance.

IPC Classes  ?

• F03B 3/12 - Blades; Blade-carrying rotors
• F03B 13/00 - Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
• F03B 13/22 - Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the flow of water resulting from wave movements, e.g. to drive a hydraulic motor or turbine

Abstract

The present invention belongs to the field of polymer-based damping materials. Disclosed are a dibenzylideneacetone modified hydrophobic butyl rubber damping composite material and a preparation method therefor. The preparation method comprises: reacting butyl rubber, sodium hydride and dibenzylideneacetone in a torque rheometer for a period of time, then mixing the rubber material using a double-roll mixing mill, sequentially adding stearic acid, zinc oxide, tetramethylthiuram disulfide, dibenzothiazyl disulfide, sulfur, a lignin modified phenolic resin and a montmorillonite filler thereto until mill banding occurs and the materials are uniformly mixed, taking out the resulting mixture, and putting the mixture aside for 24-36 hours to remove bubbles, so as to prepare raw rubber; and vulcanizing the raw rubber on a plate vulcanizing machine, so as to obtain a hydrophobic butyl rubber damping composite material. In the present application, the lignin modified phenolic resin is added and combined with the solvent-free modified butyl rubber, so the present application is green and environmentally friendly, and the operation is simple; and a benzene ring rigid group is introduced, such that the damping temperature range of the butyl rubber is widened, the damping factor is increased, the damping material has hydrophobic performance, and the application fields of the butyl rubber damping material are widened.

IPC Classes  ?

• C08L 23/26 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
• C08L 61/06 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
• C08K 3/34 - Silicon-containing compounds

Abstract

The present application discloses a SERS sensor-based method and system for detecting pesticide residues in tea leaves. The method comprises the steps of: preparing a gold-silver octahedral hollow cage; mixing a prepared sensor taking the gold-silver octahedral hollow cage as base with a standard pesticide solution to obtain SERS spectral data; and on the basis of a quantitative model, completing the detection of thiram and pymetrozine in tea leaves. According to the present application, by means of an octahedral cuprous oxide template, an Au-AgOHCs nanomaterial is prepared by secondary reduction of gold and silver ions and removal of the template by acid dissolution, so that a SERS sensor having excellent performance is prepared and used in rapid quantitative detection of thiram and pymetrozine in tea leaves. Compared with conventional smooth solid metallic nanomaterials, the present application has a stronger localized electromagnetic field and localized plasma resonance effect, so that excellent SERS sensing performance is obtained.

IPC Classes  ?

• G01N 21/65 - Raman scattering

Abstract

Disclosed in the present invention is a vinegar fermentation degree measurement device, comprising: a liquid feeding cylinder, a moving rod, a sample storage assembly, and a tube transfer assembly. The moving rod is fixedly mounted on one side of the liquid feeding cylinder, and an output end of the moving rod is provided with a piston disc located on the inner side of the liquid feeding cylinder; a suction port is formed on the surface of the liquid feeding cylinder, and an extrusion port is formed on the bottom surface of the liquid feeding cylinder; the tube transfer assembly is fixedly mounted on one side of the liquid feeding cylinder; the tube transfer assembly comprises a transmission box, a driving motor, a main toothed disc, a moving main rod and a tube replacement clamp fixedly mounted at the bottom end of the moving main rod. According to the present invention, an automatic vinegar liquid sampling test structure is provided, vinegar liquid in a brewing tank is pumped out by means of the liquid feeding cylinder and the moving rod, and the replacement of a sample storage tube is executed by means of the sample storage assembly and the tube transfer assembly; and intermittent sampling is carried out in the whole brewing process, so that test in each brewing process is ensured, automatic sampling test is achieved, and the labor costs are reduced.

IPC Classes  ?

• G01N 1/14 - Suction devices, e.g. pumps; Ejector devices

Abstract

mv1mv2m1nmn-1n-1), to perform n-th glazing on the surface of the thermal barrier coating, till the width of micro-cracks on the surface is less than 1 μm, and stopping glazing, wherein n=2, 3, 4, …; and step S5, placing the glazed thermal barrier coating in a muffle furnace for pre-sintering to form a sintered layer. The method in the present invention reduces the surface roughness of the thermal barrier coating, improves the hardness and the strain tolerance of thermal barrier coatings, and eliminates cracks formed in a conventional laser glazing process.

IPC Classes  ?

• C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer

Abstract

Provided are a modified polyphenylene sulfide and a modification method therefor, a polyphenylene sulfide solid separator, a pre-prepared zinc salt separator and a manufacturing method therefor, and an injection-ready zinc-manganese secondary battery and manufacturing and application methods therefor. Tetra-chloro-benzoquinone in a polyphenylene sulfide powder is subjected to chlorine reduction and hydrogenation reactions via hydrothermal synthesis to generate chlorocatechol structural molecules, and the adsorption performance of the polyphenylene sulfide-based solid separator on harmful molecules is improved; also, upon integration into a battery assembly process, weld points are protected, and in a chemical synthesis process, a method of firstly injecting an aqueous solution electrolyte and then adding an alcohol is utilized, the cycling stability of the battery is improved, and the operating temperature interval of the battery is widened. In the manufacturing process of the pre-prepared zinc salt separator, an electrolyte zinc salt is pre-placed into a composite glue solution of a solid separator and upper and lower supporting separators, the problem where high-concentration electrolytes in zinc-manganese secondary batteries find difficulty in uniformly infiltrating into battery electrode pieces is solved, and the production efficiency and the battery performance of zinc-manganese secondary batteries are improved.

IPC Classes  ?

• C08G 75/029 - Modification with organic compounds
• H01M 50/414 - Synthetic resins, e.g. .thermoplastics or thermosetting resins
• H01M 50/403 - Manufacturing processes of separators, membranes or diaphragms
• H01M 50/40 - Separators; Membranes; Diaphragms; Spacing elements inside cells
• H01M 10/44 - Methods for charging or discharging
• H01M 10/36 - Accumulators not provided for in groups
• H01M 10/38 - Construction or manufacture

Abstract

A precision machining device for a sphere and a machining method. The machining device comprises a cavity, an abrasive particle flow (10), and a circulation device; a workpiece (6) is placed in the cavity; the cavity is composed of two hollow hemispheres (7, 9); the two hemispheres (7, 9) are each provided with a main flow channel; the main flow channels are communicated with the cavity; one end of each of the main flow channels of the two hemispheres is connected to the circulation device; and the abrasive particle flow (10) is made to grind the workpiece (6) by means of the circulation device. The plurality of main flow channels are uniformly distributed in the hemispheres (7, 9), each main flow channel is provided with a plurality of branch flow channels communicated with the cavity, and the branch flow channels gradually shrink in the flow direction. According to the machining method, precise machining is achieved by means of different abrasive particle flow pressures on the surface of the workpiece, so that the shape precision of the workpiece can be effectively improved.

IPC Classes  ?

• B24B 31/116 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
• B24B 31/112 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure

Abstract

A mechanical gearbox device capable of power-uninterrupted gear shifting, comprising a built-in transmission shaft, a hollow transmission shaft, a gearbox housing, a 1st-2nd-gear shifting engaging sleeve, a 1st-gear duplex gear, a 2nd-gear duplex gear, a 3rd-4th-gear shifting engaging sleeve, a 3rd-gear duplex gear, a 4th-gear duplex gear, a torque transmission adjusting device input shaft, a left control oil way, a torque transmission adjusting device, a right control oil way, a torque transmission adjusting device driven disc output shaft, an output driving gear, a connecting shaft, a gearbox output shaft, an output driven gear, a 1st-gear driven gear, a 2nd-gear driven gear, a 3rd-gear driven gear and a 4th-gear driven gear. During gear shifting, power of the hollow transmission shaft is cut off by means of a main clutch of a vehicle, so as to facilitate gear engagement; and power is continuously provided for the gearbox output shaft by means of the built-in transmission shaft and the torque transmission adjusting device, so as to maintain power output of the gearbox during mechanical gear shifting, thus achieving power-uninterrupted gear shifting of mechanical gearboxes.

IPC Classes  ?

• F16H 3/72 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously

Abstract

The present invention relates to the field of water treatment. Disclosed is a high-flux reverse osmosis treatment device having a rotary hydrophobic membrane. According to the device provided by the present invention, a hydrophobic filter membrane covers the outer wall of an inner rotary cylinder having a flow-guide collection tank, and a filtrate is guided out through a central channel. Moreover, a new principle of "time dimension selectivity" is introduced as the theoretical basis of the present invention, which allows the pore diameter of a reverse osmosis membrane to be much larger than the size of a filter, such that it is convenient to process and produce the membrane, the phenomena of concentration polarization and membrane pollution of a membrane surface in the separation process are well solved, the permeation flux of the membrane is remarkably increased, the rejection rate of substances is not low, and the separation performance in water treatment is greatly improved.

IPC Classes  ?

• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
• B01D 61/08 - Apparatus therefor
• B01D 61/10 - Accessories; Auxiliary operations
• B01D 61/12 - Controlling or regulating

Abstract

The present invention belongs to the technical field of nanoscience and fluorescent sensing, and particularly, relates to a preparation method for a paper-based sensor for detecting ammonia gas and use thereof. Firstly, Zn(PA)(BPE) is prepared, and ammonia gas is adsorbed by means of utilizing a porous structure on the surface of Zn(PA)(BPE), so that the reaction sensitivity to ammonia gas is improved; then, a Zn(PA)@CNQDs ratio-type fluorescent substance is further formed by means of embedding Zn(PA)(BPE) and CNQDs, and finally dissolved in ultrapure water to obtain a solution; and the solution is dropwise added to a filter paper, and is loaded on the filter paper by means of nitrogen purging, so that the ratio-type fluorescent paper-based sensor is obtained. The present invention utilizes the embedding of Zn(PA)(BPE) and CNQDs to form the ratio-type fluorescent paper-based sensor, which not only enables CNQDs to be more stable, but also improves the background anti-interference capability for detecting ammonia gas. The present invention has relatively high selectivity and sensitivity, and has good application prospects in the process of detecting the spoilage and deterioration of meat products.

IPC Classes  ?

• C09K 11/65 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials containing carbon
• G01N 21/64 - Fluorescence; Phosphorescence
• C01B 32/15 - Nanosized carbon materials

Abstract

3-x3-x3-x3-x thin film is formed by tungsten oxide containing oxygen vacancies. The oxygen vacancies contained in tungsten oxide in the present invention have the capability of decomposing water, so that the gas-sensitive material can resist humidity interference. Moreover, the nanoscale Pd cluster has a selective catalytic effect on hydrogen. Therefore, the sensor made of the hydrogen gas-sensitive material provided by the present invention has the capability of resisting humidity interference, the response sensitivity of the sensor to hydrogen does not change along with the change of humidity, and the sensor has excellent selectivity for hydrogen.

IPC Classes  ?

• C01G 41/02 - Oxides; Hydroxides
• C01F 7/021 - After-treatment of oxides or hydroxides
• C01G 23/04 - Oxides; Hydroxides
• B82Y 40/00 - Manufacture or treatment of nanostructures
• B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
• B82Y 15/00 - Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
• G01N 27/12 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon reaction with a fluid

Abstract

The present invention provides a doped colloidal metal oxide quantum wire, a preparation method therefor, a gas sensor, a gas sensor array and uses, and relates to the technical field of gas sensors. The present invention comprises mixing a main metal precursor, a doped metal precursor, an alcohol solvent and a fatty acid surfactant to carry out a solvothermal reaction, so as to obtain a doped colloidal metal oxide quantum wire, main metal elements in the main metal precursor comprising Sn, Zn, W, In and the like, and doped metal elements in the doped metal precursor comprising V, Nb, Ta and the like. A gas sensor constituted by using as a gas-sensitive material the doped colloidal metal oxide quantum wire provided by the present invention can work at room temperature, and has a lower limit of ppb level for gas detection. The gas sensor also has a capability of resisting to humidity interference. Assembling the gas sensors constituted by the doped colloidal metal oxide quantum wires into an array may selectively recognize and detect multiple gases.

IPC Classes  ?

• G01N 27/12 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon reaction with a fluid

Abstract

A laser-arc and interlayer mechanical regulation and control composite manufacturing method for an aerospace aluminum alloy component. First, a localized controllable-pulse laser (3) is used as a heat source, and is combined with an electric arc to melt an aluminum alloy wire, so that laser absorptivity and utilization rate of a liquid melt pool are improved; next, interlayer ultrasonic rolling treatment is synchronously used in a dynamic recrystallization temperature zone of a deposition layer.

IPC Classes  ?

• B23K 26/342 - Build-up welding
• B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
• B23K 26/60 - Preliminary treatment
• B23K 26/70 - Auxiliary operations or equipment

Abstract

Disclosed in the present invention are a multi-excitation source partitioned hierarchical variable-pole axial flux permanent magnet motor, and a variable working condition drive control system. The motor mainly comprises two parts, i.e., a main pole and an auxiliary pole, wherein the main pole is responsible for providing an air gap main magnetic flux and is connected to a dual-stator magnetic circuit in series; the auxiliary pole is responsible for adjusting an air gap magnetic field and is connected to the dual-stator magnetic circuit in parallel; the magnetic flux of the main pole and the magnetic flux of the auxiliary pole together form the air gap magnetic field, and a magnetic flux path of the auxiliary pole can be controlled by controlling the magnitude of a current applied to an excitation winding, so as to adjust the air gap magnetic flux, expand the motor speed adjustment range, achieve operation of the motor in various variable working conditions, further reduce torque pulsation, increase power density, achieve high-efficiency and high-reliability operation of the motor, and improve the dynamic working performance of the motor.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/14 - Stator cores with salient poles
• H02K 1/2793 - Rotors axially facing stators

Abstract

A self-propelled full-automatic densely planted vegetable transplanter, comprising a seedling pick-up and delivery mechanism (1), a box transfer device (4), a caterpillar-track-type travelling chassis (10), a seedling guide device (13), a soil covering mechanism (14), a planting mechanism (16) and a dispersing device (17), wherein the box transfer device (4) is mounted on the caterpillar-track-type travelling chassis (10); the dispersing device (17) is located on one side of the box transfer device (4); the seedling pick-up and delivery mechanism (1) comprises a seedling pick-up and delivery motion mechanism (1-2) and a linear movement mechanism; the linear movement mechanism is arranged above the box transfer device (4), and the seedling pick-up and delivery motion mechanism (1-2) reciprocatingly moves between the dispersing device (17) and the box transfer device (4) by means of the linear movement mechanism; the dispersing device (17) is connected to the seedling guide device (13), and the planting mechanism (16) is located at the bottom of the seedling guide device (13); and the soil covering mechanism (14) is mounted on the caterpillar-track-type travelling chassis (10), and is located behind the planting mechanism (16). The transplanter effectively solves the existing problems of seedling leaf damage and seedling entrainment caused by seedling pick-up jaws picking up seedlings by being inserted from right above the seedlings. Thus, the transplanter reduces damage to seedling pots, ensures the integrity of the seedling pots, and improves the success rate of seedling pick-up. A planting control method for the transplanter is further involved.

IPC Classes  ?

• A01C 11/02 - Transplanting machines for seedlings

Abstract

The present invention belongs to the technical field of preparation of nano materials and sensors. Provided are a composite magnetic-assisted ratiometric fluorescent probe, a preparation method therefor, and the use thereof. The composite magnetic-assisted ratiometric fluorescent probe of the present invention is obtained by compounding blue fluorescent carbon dots and a magnetically functionalized europium polymer. With the addition of chloramphenicol, changes on the fluorescence signals of the composite magnetic-assisted ratiometric fluorescent probe can be observed. In addition, the composite magnetic-assisted ratiometric fluorescent probe has a built-in calibration function, so that interferences caused by environment and instruments can be reduced. Moreover, the composite magnetic-assisted ratiometric fluorescent probe has good selectivity on chloramphenicol while achieving good anti-interference performance against common antibiotics and inorganic ions, and therefore can be used for visual detection of chloramphenicol in foods.

IPC Classes  ?

• C09K 11/06 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing organic luminescent materials
• C09K 11/65 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials containing carbon
• G01N 21/64 - Fluorescence; Phosphorescence
• G01N 21/01 - Arrangements or apparatus for facilitating the optical investigation

Abstract

ss vary randomly, and randomly allocating the action times of two zero vectors within one switching period, so as to form a random zero-vector-variable-delay SVPWM algorithm, to disperse harmonics at a switching frequency and integer multiples thereof into a specified frequency domain, thereby suppressing high-frequency vibration and noise during fault-tolerant operation. Finally, the motor having one open-circuited phase operates in a low-vibration-noise fault-tolerant mode.

IPC Classes  ?

• H02P 21/05 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 27/12 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• H02P 25/024 - Synchronous motors controlled by supply frequency

Abstract

00, a ploughshare surface angle ε, an included angle η between a soil trace and a ploughshare edge, and a soil lifting angle θ, at which the lowest working resistance is achieved, are determined, and composition optimization design and die forging-machining-carburization-quenching-tempering treatment are performed on a base material of the plough point, such that a new reversible plough point with the characteristics of a low operation resistance, high strength toughness of a core portion, and high wear resistance of a surface layer is obtained. The present invention can effectively solve the problems of wear, failure and resistance increase which easily occur due to a plough point being subjected to high-speed impact and wear from soil, sand, stones and root blocks for a long period of time during a service process, and the present invention is expected to be widely applied to the field of manufacturing of soil contact components of agricultural machinery.

IPC Classes  ?

• G06F 30/17 - Mechanical parametric or variational design
• G06F 30/20 - Design optimisation, verification or simulation
• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G16C 60/00 - Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation

Abstract

An efficient reed harvester, comprising a pre-cutting detection unit, a cutting device, a conveying device, a bundling and stacking device, a chassis (6) and a control unit (7), wherein the pre-cutting detection unit is used for detecting height information of reeds in a pre-cutting area, and transmitting the height information to the control unit; the conveying device is used for collecting and clamping reed stalks and conveying same backward to the bundling and stacking device; the bundling and stacking device is located behind the conveying device and is used for knotting the reeds into small bundles, vertically or flatwise stacking the small bundles of reeds, and knotting the small bundles of reeds into large bundles; the control unit (7) is used for calculating, according to the height information of the reeds in the pre-cutting area, the average height of the reeds in the pre-cutting area, and adjusting the height of the conveying device according to the average height of the reeds; and the control unit (7) controls the bundling and stacking device to vertically or flatwise stack the small bundles of reeds and knot the small bundles of reeds into the large bundles. The present reed harvester can achieve efficient harvesting of reeds; and is also suitable for efficient harvesting of other high-stalk crops.

IPC Classes  ?

• A01D 45/00 - Harvesting of standing crops
• A01D 57/22 - Delivering mechanisms for harvesters or mowers for standing stalks
• A01D 75/00 - Accessories for harvesters or mowers
• A01D 67/00 - Undercarriages or frames specially adapted for harvesters or mowers; Mechanisms for adjusting the frame; Platforms
• A01D 61/00 - Elevators or conveyors for binders or combines

Abstract

A reed bundling and stacking device, which comprises a knotter (2), a material box (3), a stacking mechanism (4), and a control unit (7), wherein the stacking mechanism is located between the knotter and the material box; the knotter is used for knotting reeds into small bundles; the stacking mechanism is used for vertical or flatwise stacking of the small bundles of reeds into the material box; the material box is used for knotting the small bundles of reeds into large bundles; and the control unit is separately connected to the material box and the stacking mechanism. Mechanical clamps (401, 402) in the stacking mechanism can implement vertical stacking and flat stacking, have a flexible structure, and are suitable for a material box device for discharging in different directions. The present reed bundling device uses mechanical clamps instead of labor to stack reed bundles, thereby greatly reducing the labor intensity, and improving the working efficiency and the intelligence level of a reed harvester. Further disclosed are a harvester comprising the reed bundling and stacking device, and a control method for the reed bundling device.

IPC Classes  ?

• A01D 59/02 - Packers
• A01D 61/00 - Elevators or conveyors for binders or combines
• A01F 15/00 - Baling presses for straw, hay or the like

Abstract

The present invention relates to the technical field of aluminum-based alloys, and in particular to a particle-reinforced aluminum-based composite intermediate alloy and a preparation method therefor, and an aluminum-based composite material and a preparation method therefor. The particle-reinforced aluminum-based composite intermediate alloy provided by the present invention comprises an aluminum oxide particle-reinforced aluminum-based composite intermediate alloy and a nano zirconium diboride particle-reinforced aluminum-based composite intermediate alloy; and the aluminum oxide particle-reinforced aluminum-based composite intermediate alloy comprises a nano aluminum oxide particle-reinforced aluminum-based composite intermediate alloy and a micron aluminum oxide particle-reinforced aluminum-based composite intermediate alloy. The particle-reinforced aluminum-based composite intermediate alloy provided by the present invention comprises two particles of different scales, namely nanoparticles and micron particles, thus mitigating the problem of single nanoparticles being prone to agglomeration. According to the present invention, the introduction of dual-component particles of different scales into an aluminum-based alloy can significantly improve the high-temperature creep resistance of an aluminum-based composite material.

IPC Classes  ?

• C22C 1/10 - Alloys containing non-metals
• C22C 1/059 - Making alloys comprising less than 5% by weight of dispersed reinforcing phases
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys
• B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
• B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
• B82Y 40/00 - Manufacture or treatment of nanostructures

Abstract

The present invention relates to the technical field of multiphase flow simulation, and provides a gas-liquid numerical simulation drag force correction method and system, a device, and a medium. The method comprises: establishing a three-dimensional pipeline model; performing grid division on the three-dimensional pipeline model by using a polyhedral grid division mode, to obtain a three-dimensional pipeline model having undergone grid division; on the basis of the basic theory of an Euler-Euler two-fluid model, establishing an initial computational fluid dynamics model; acquiring environment pressure, and determining a correction function according to the environment pressure; correcting the initial computational fluid dynamics model according to the correction function to obtain a corrected computational fluid dynamics model; and according to the corrected computational fluid dynamics model and the three-dimensional pipeline model having undergone grid division, performing unsteady simulation of gas-liquid two-phase flow in a pipe to obtain gas holdup distribution in the pipe. According to the present invention, inter-phase drag force can be corrected according to environment pressure, and the accuracy of gas holdup prediction in a high-pressure environment is improved.

IPC Classes  ?

• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]

Abstract

Disclosed in the present invention are a multi-task joint sensing network model and detection method for traffic road surface information. By means of the present invention, lane lines and drivable areas can be simultaneously detected. A coordinate attention mechanism is integrated into a traditional feature extraction network, which ensures that a feature extraction effect is enhanced without increasing the amount of calculation. In a neck network, the present invention innovatively proposes a dilated convolutional residual module so as to enhance the prediction performance of the network with regard to details, and a decoder part shares features of drivable areas with lane line detection so as to enhance the lane line detection effect under complex road conditions. In a training stage, a new alternating-optimization training method is proposed so as to improve the overall segmentation performance of the model. The present invention achieves very high accuracy and excellent speed performance for a challenging BDD100K data set, wherein the mIoU of drivable-area segmentation reaches 92.51%, the accuracy rate and IoU of lane line detection are respectively 87.29% and 32.12%, and the overall inference speed reaches 39FPS, and the detection effect is superior to that of a traditional single-task network model.

IPC Classes  ?

• G06V 20/58 - Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads

Abstract

A non-road diesel engine air intake working medium and fuel heat management system and a control method. The system comprises: an intercooler (1), a one-way valve (2), a heat exchanger (3), a controller (4), a fluid storage tank (5), a temperature sensor (6), a filter (7), a fluid pump (8), a fluid pipeline (9), a solenoid valve (10), a turbocharger (11), an engine body (12), and an engine air intake pipe (13); the heat exchanger (3) comprises a heat exchange box (14), a box cover plate (15), a temperature sensor base (16), an air intake flow guide housing (17), a heat exchange pipe (18), a heat exchange pipe base (19), and an air intake flow channel (20). The control method comprises: constructing a controller (4), a solenoid valve (10), and a heat exchange box (14); setting a target temperature and a protection temperature; judging whether the temperature of heat exchange water is greater than the target temperature, judging whether the temperature of fuel is greater than the protection temperature, and obtaining judgment results; and based on the judgment results, controlling the water temperature of the heat exchange box (14) to be constant. The system and the method achieve waste heat utilization, controllable fuel temperature, and according to different fuels needing to be heated, achieve automatic control and temperature protection, thereby improving the operating performance of a diesel engine under low-temperature conditions, and optimizing the vaporization effects of multi-element fuel.

IPC Classes  ?

• F02B 29/04 - Cooling of air intake supply

Abstract

A method for recovering proteins from minced-fish washing waste liquid on the basis of low-temperature plasma technique, belonging to the technical field of foods. The method comprises: first preparing fish and chopping same to produce minced fish; adding the minced fish to water, mixing and washing same, and performing centrifugation to obtain a supernatant, namely, a liquid obtained after minced fish washing; adjusting the input power of a plasma apparatus to be 300-800 W, placing a gun nozzle of the plasma apparatus to a position below the liquid surface of said liquid, turning on a power supply, and exciting plasma with air as a gas source, such that the plasma uniformly acts on said liquid, the treatment time being 2-6 min; after the treatment, standing said treated liquid in an environment having the temperature of 10℃ or below, and then performing centrifugation to obtain a precipitate, thereby achieving recovery of proteins in the liquid obtained after minced fish washing. Using the low-temperature plasma to treat the liquid obtained after minced fish washing improves the protein recovery rate and shortens the process flow of protein recovering, and also avoids secondary pollution during recovering processes, thus achieving wide application prospects.

IPC Classes  ?

• C07K 1/30 - Extraction; Separation; Purification by precipitation

Abstract

A method for optimizing PID control parameters of a semi-active suspension of a vehicle. The method comprises: constructing a 1/4 semi-active suspension model of a vehicle; determining a state variable, output variable and state space expression equation of the semi-active suspension model; constructing a PID controller; improving a sparrow search algorithm, and optimizing PID parameters and importing same into the PID controller; calculating a semi-active controller suspension system output, and calculating a comfort value; and improving a sparrow-search-algorithm semi-active suspension control system. By taking the degree-of-freedom of a 1/4 semi-active suspension as a research object, a comfort function is provided according to different influence weights, and continuous iteration and comparison are performed by means of a semi-active suspension control algorithm to search for an optimal PID parameter, so as to find the maximum comfort value, thereby ultimately ensuring traveling smoothness, operation stability and riding comfort. Optimizing the search capability of a sparrow search algorithm yields more rational parameters for a sparrow search algorithm controller in respect of PID control, thereby improving implementation of suspension control.

IPC Classes  ?

• B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or s the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
• B60G 17/06 - Characteristics of dampers
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

The present invention relates to gear machining and a cutter therefor, in particular to a design method for a cylindrical gear turning cutter without a structural relief angle. The method comprises: designing the number of teeth and a mounting shaft angle of a cutter; calculating a barrel-shaped conjugate surface that is conjugate with a tooth surface of a gear to be machined; determining the distance from a rake face of the cutter to a middle cross section of the barrel-shaped conjugate surface; designing a helix angle of the cutter; designing a rake angle of the cutter; calculating the cutting edge shape of the rake face of the cutter; obtaining design parameters and mounting parameters of a gear turning cutter; and manufacturing the cutter according to the aforementioned design parameters of the cutter, and conducting gear turning on a gear turning machine tool according to the mounting parameters of the cutter. In order to address the problems of rapid precision decline and the short service lives of common bevel gear turning cutters after regrinding of the cutters, the present invention provides a gear turning method under a through-space offset conjugation condition. The designed cylindrical gear turning cutter has constant precision after being reground; the cutter is reground many times, and has a longer service life; and the cutter can be machined using form grinding, such that a manufacturing process therefor is easy and convenient.

IPC Classes  ?

• G06F 30/17 - Mechanical parametric or variational design
• B23F 21/00 - Tools specially adapted for use in machines for manufacturing gear teeth
• B23F 5/00 - Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
• G06F 119/04 - Ageing analysis or optimisation against ageing

Abstract

A device for measuring and calibrating ground pressure of sowing depth-limiting wheels, comprising: a base unit (100), a pressure adjusting member (10), depth-limiting wheels (20), a pressure sensor and a pressure acquisition calibrator (40), wherein the base unit (100) is connected to a pair of depth-limiting wheels (20), the pressure adjusting member (10) is arranged on the base unit (100), the pressure adjusting member (10) is used for adjusting the pressure of the depth-limiting wheels (20) to the ground, the pressure sensor is arranged on the base unit (100) and is used for measuring the actual pressure output by the pressure adjusting member (10), the pressure acquisition calibrator (40) is used for measuring the ground pressure applied by the depth-limiting wheels (20) to the ground, and the pressure acquisition calibrator (40) is further used for automatically fitting a plurality of actual pressures and a plurality of ground pressures and then establishing a model for measuring ground pressure of the depth-limiting wheels. According to the device for measuring and calibrating ground pressure of sowing depth-limiting wheels, a plurality of actual pressures and a plurality of ground pressures can be automatically acquired, and then a model for measuring ground pressure of the depth-limiting wheels is established, thereby avoiding the problems of low efficiency and poor accuracy caused by manual recording and manual fitting. Also provided is a method for measuring and calibrating ground pressure of sowing depth-limiting wheels.

IPC Classes  ?

• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• G01L 25/00 - Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
• A01C 7/00 - Sowing

Abstract

A cryogenic laser shock apparatus, comprising a cooling box (1), a transition chamber (2) and a laser shock chamber (3), wherein the transition chamber is provided with a first automatic door (4) and a second automatic door (6), and the second automatic door is located between the transition chamber and the laser shock chamber; each of the transition chamber and the laser shock chamber is connected to a vacuum pump (9) by means of an air extraction hose (8); and a robotic arm (20) and a laser shock peening apparatus are arranged inside the laser shock chamber. By means of the apparatus, the problem of insufficient light transmission caused by direct contact between liquid nitrogen and a sample is avoided, such that cryogenic laser shock peening can be performed on the sample in a vacuum environment; cryogenic laser shock peening can be performed on a metal material within a sample temperature range of 0 C to -190 C; and the apparatus is suitable for performing cryogenic laser shock peening on a flat-surface sample and a curved-surface sample and performing cryogenic laser shock on a large scale, thereby reducing costs of shock peening. The present invention further relates to a low-temperature laser shock method.

IPC Classes  ?

• B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
• B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
• B23K 26/70 - Auxiliary operations or equipment

Abstract

An ultra-high-precision aerodynamic force servo system and an intelligent control parameter optimization method therefor. The aerodynamic servo system is mainly composed of a double-acting air-floating friction-free cylinder (10) and a pressure control system. The effect of friction on the output force control precision can be removed by using the air-floating friction-free cylinder (10); in the pressure control system, ultra-high-precision control over the pressure is realized by means of a fuzzy PI controller optimized on the basis of a new improved particle swarm algorithm; a Gaussian mutation policy and a fuzzy control theory are fused in the new improved particle swarm algorithm; and optimized fuzzy PI control parameters are obtained by using the new improved particle swarm algorithm, ultra-high-precision pressure control over a cavity of the air-floating friction-free cylinder (10) is executed on the basis of the parameters, and an ultra-high-precision force output of the system can be realized. The aerodynamic force servo system can be applied to occasions with very high requirements for force control precision, and expands the application range of the aerodynamic force servo system.

IPC Classes  ?

• G05D 16/20 - Control of fluid pressure characterised by the use of electric means

Abstract

Disclosed in the present invention are a photoelectric detection model transfer and sharing method based on a cloud service, and an Internet-of-Things monitoring and assessment system. The transfer and sharing method is specifically as follows: correcting spectrum information of an agricultural product sample by means of calling a temperature compensation model and a spectrum transfer model, and calling a detection model to calculate corrected spectrum information, so as to obtain a detection result of the agricultural product sample. An Internet-of-Things monitoring and assessment system performs spectrum information correction by using a spectrum transfer and sharing method, and then calls a detection model to carry out calculation, and a detection result is returned to a detection terminal in real time, thereby realizing remote monitoring and assessment of the quality of an agricultural product. By means of the present invention, the sharing of a detection model among different detection terminals can be realized, such that the present invention has wide application prospects in quality spot check and evaluation of an agricultural product.

IPC Classes  ?

• G01N 21/359 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light

IPC Classes  ?

• C04B 35/50 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare earth compounds

Abstract

An ultra-high-speed planar laser cladding additive fabrication apparatus, comprising a laser generator (12), a mobile platform (19), an ultrasonic vibration platform (1), a main shaft (29), a rotation and light path propagation mechanism (10), and a cladding nozzle (4). The laser generator (12) is used for generating a laser beam (13). A substrate (3) is placed on the ultrasonic vibration platform (1), and the substrate (3) is rotated by means of the rotation of the ultrasonic vibration platform (1). The ultrasonic vibration platform (1) is mounted on a base (18) by means of the mobile platform (19). The main shaft (29) is movably mounted above the substrate (3). The rotation and light path propagation mechanism (10) is mounted on the main shaft (29). The cladding nozzle (4) is mounted on the rotation and light path propagation mechanism (10) by means of a radial movement apparatus, and the cladding nozzle (4) is rotated by means of the rotation and light path propagation mechanism (10). The laser beam (13) sequentially passes through the main shaft (29) and the rotation and light path propagation mechanism (10) and then enters the cladding nozzle (4). The direction of rotation of the cladding nozzle (4) is opposite to the direction of rotation of the substrate (3). The apparatus can implement ultra-high-speed laser cladding additive fabrication on a plane and can achieve laser cladding at the same linear speed.

IPC Classes  ?

• B22F 12/00 - Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• B22F 12/17 - Auxiliary heating means to heat the build chamber or platform
• B22F 12/53 - Nozzles
• B22F 12/37 - Rotatable
• B22F 12/60 - Planarisation devices; Compression devices
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• B22F 10/73 - Recycling of powder
• B22F 12/90 - Means for process control, e.g. cameras or sensors
• B22F 10/30 - Process control
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
• B33Y 80/00 - Products made by additive manufacturing
• B33Y 40/10 - Pre-treatment

Abstract

Disclosed in the present invention is a low-vibration fault-tolerant current calculation method for an open-phase fault of a six-phase permanent magnet motor. When a six-phase permanent magnet motor uses a full-bridge power supply mode, if an open-phase fault occurs, the vibration performance under the open-phase operation of the motor is sharply deteriorated. Open-phase fault types comprise: single-phase open phase, two-adjacent-phase open phase, two-non-adjacent-phase open phase, and at-most-three-phase open phase. In order to suppress the vibration response deterioration of the motor after an open-phase fault occurs in the motor, aiming at a reverse magnetomotive force condition in the residual-phase synthesized magnetomotive force under different open-phase fault types, the residual-phase magnetomotive force is reconstructed, and a residual-phase current is adjusted so as to maintain a normal vibration response. Compared with a conventional fault-tolerant current algorithm for an open-phase fault, the present invention mainly solves the problem of vibration response deterioration present during operation of a six-phase permanent magnet synchronous motor under an open-phase fault. Meanwhile, the torque performance of the motor under the open-phase fault is ensured while the vibration performance of the motor under the open-phase fault is improved.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/05 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 29/028 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault

Abstract

An indirect multi-level waste heat recovery heat pump air-conditioning system, and a control method therefor. The control method comprises: by means of a compressor, controlling the flow of a refrigerant; by means of a first water pump (201), a second water pump (301) and a third water pump (402), controlling the flow of a cooling liquid; by means of a blower (501) and a fan (502), controlling the flow of air; controlling the heating power of a first heater (202) and a second heater (403); and, by means of a first one-way valve (102), a first electronic expansion valve (104), a second one-way valve (106), a second electronic expansion valve (107), a third electronic expansion valve (109), a three-way valve (304), a third one-way valve (401), and a fourth one-way valve (405), controlling communication and disconnection of fluids, or achieving specified flow states, thus satisfying various thermal management requirements under all-weather conditions, and reducing energy consumption by means of reasonable utilization of waste heat.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• B60L 58/26 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling

Abstract

The present invention relates to the technical field of multi-phase motor control. Disclosed are a dual three-phase motor high-precision model prediction current control system and a control method. According to the present invention, a traditional 12 virtual voltage vector control set is expanded, and 24 virtual voltage vectors with equal amplitude and uniform phase angles are designed without losing a voltage utilization rate, so that the control precision is improved. Provided is a duty cycle calculation method based on a minimum error. Even under a single effective virtual voltage vector, the current in the d and q axes can be tracked at the same time, and it is ensured that an optimal duty cycle is outputted. In addition, the process of traversing all voltage vectors in prediction control is simplified, and the calculation burden of an algorithm is reduced. According to the present invention, the precision of model prediction control is greatly improved by expanding a control set and reducing a duty cycle calculation error, fifth-order and seventh-order harmonics are reduced, and the torque ripple is improved. Moreover, it is ensured that even under 24 voltage vectors, the calculation amount is still low, and the execution efficiency of the algorithm is improved.

IPC Classes  ?

• H02P 6/10 - Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
• H02P 6/28 - Arrangements for controlling current

Abstract

Disclosed in the present invention are a permanent magnet fault-tolerant hub electric motor based on an active position-sensorless policy, and driving and design methods therefor. According to the present invention, in an electric motor design stage, the position-sensorless operation performance is taken into consideration in advance, and a permanent magnet fault-tolerant hub electric motor based on an active position-sensorless policy is provided. By means of fractional-slot concentrated windings and by cleverly using a consequent pole, a multi-layer magnetic barrier, an auxiliary permanent magnet, etc., the position-sensorless operation accuracy of an electric motor is improved on the basis of ensuring the fault tolerant capability of the electric motor. At a control level, a secondary harmonic suppression policy based on frequency band self-adaption is proposed to suppress the influence of a secondary salient harmonic on position observation, and also improve the dynamic response performance of a system. The present invention breaks through the technical constraints of a traditional hub electric motor position-sensorless driving system; and the position-sensorless operation capability of an electric motor driving system under a plurality of operation conditions is comprehensively improved by means of a five-phase permanent magnetic fault-tolerant hub electric motor design based on an active position-sensorless policy in combination with a high-precision position-sensorless control algorithm.

IPC Classes  ?

• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02K 1/16 - Stator cores with slots for windings

Abstract

A synthetic gas waterless circulation washing and purifying device and a purifying method. The device mainly comprises a first circulation purifying unit, a second circulation purifying unit, and a mop fan (9) connected to the first circulation purifying unit and the second circulation purifying unit. The first circulation purifying unit comprises a first shell (1) and a heavy tar circulation spraying system, and heavy tar and dust particles in gas are preliminarily captured by means of Venturi washing, liquid film impact and air cooling. Blades of the mop fan (9) are composed of a large number of fine wetting fiber filaments, and the large surface area of the blades is beneficial to further interception of heavy tar and dust particles. The second circulation purifying unit comprises a second shell (15) and an oil-based detergent regeneration system, and residual light tar in the gas is absorbed in a bubbling mode and by means of an activated carbon bed layer. According to the device and the method, gas purification is carried out by cyclic utilization of self-produced tar and carbon, waterless washing is carried out in the whole process, the device and the method are economical and environment-friendly, and the application prospect is wide.

IPC Classes  ?

• C10K 1/10 - Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
• C10K 1/02 - Dust removal
• B01D 47/10 - Venturi scrubbers

Abstract

The present invention relates to the technical field of Pickering emulsion preparation, and in particular, to a method for ultrasonic preparation of a Pickering emulsion containing lotus root starch and use thereof as functional food. The method comprises: preparing a lotus root starch nanoparticle by autoclaving and retrogradation, and preparing a Pickering emulsion of lotus root starch-xanthan gum by focused ultrasound techniques. The present invention features simple and convenient operation, the absence of chemicals, environment conservation, and safety, and thus provides a Pickering emulsion of lotus root starch-xanthan gum with a smaller particle size and better stability. The Pickering emulsion is also investigated for its oxidation stability and protective effect on docosahexaenoic acid and eicosapentaenoic acid by means of carrying herring oil. By adding xanthan gum to the starch nanoparticles as a Pickering emulsion stabilizer, the present invention significantly improves the stability of the Pickering emulsion. Moreover, since the two materials are polysaccharides of natural sources and are safe and reliable, the emulsion can be used in food.

IPC Classes  ?

• A61K 9/107 - Emulsions
• A23L 29/30 - Foods or foodstuffs containing additives; Preparation or treatment thereof containing starch hydrolysates, e.g. dextrin
• A23L 33/115 - Fatty acids or derivatives thereof; Fats or oils
• A23L 29/269 - Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of microbial origin, e.g. xanthan or dextran
• A23L 5/30 - Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
• B01F 23/411 - Emulsifying using electrical or magnetic fields, heat or vibrations

Abstract

A method for preparing an antibacterial and freshness-retaining packaging material for fruits by using the 3D printing technology, relating to the field of food processing. The method comprises the steps of: respectively dissolving gum arabic and pullulan in deionized water to obtain a gum arabic solution and a pullulan solution, culturing probiotics and then centrifuging and resuspending same to obtain a bacterial solution, and finally, mixing the bacterial solution with the gum arabic solution and the pullulan solution to obtain a core layer solution; mixing polyvinyl chloride, a modifier and a plasticizer to obtain a shell layer solution; respectively injecting the shell layer solution and the core layer solution into an injector, the propulsion rate of the shell layer solution being greater than the propulsion rate of the core layer solution, and finally obtaining a coaxially printed product having a core-shell structure; then only printing the shell layer solution on the outer layer of the coaxially printed product by using the single-axis 3D printing technology to obtain an antibacterial and freshness-retaining packaging material having an inner and outer double-layer structure, the inner layer keeping fruits fresh and the outer layer protecting the fruits. A significant technical effect is achieved.

IPC Classes  ?

• C08L 5/02 - Dextran; Derivatives thereof
• C08L 5/00 - Compositions of polysaccharides or of their derivatives not provided for in group or
• C08L 27/06 - Homopolymers or copolymers of vinyl chloride
• C08L 23/08 - Copolymers of ethene
• C08L 23/28 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
• B65D 65/40 - Applications of laminates for particular packaging purposes
• B29C 64/106 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
• B29C 64/209 - Heads; Nozzles
• B29C 64/314 - Preparation
• B29C 64/336 - Feeding of two or more materials

Abstract

A soil compaction measuring apparatus (1) and measuring method, which relate to the technical field of agricultural intelligent equipment. The soil compaction measuring apparatus (1) comprises a frame (10), a pressure regulating device (20), a ditching device (30), a ditching depth measuring device (40) and a ground contact point pressure measuring device (50), wherein the pressure regulating device (20) is connected to the frame (10), the pressure regulating device (20) is adapted to apply a first acting force to the frame (10), and the ditching device (30) is connected to the frame (10); the ditching depth measuring device (40) is connected to the frame (10) and/or the ditching device (30), there is at least one point on the ditching depth measuring device (40) that is in contact with the ground, and the point on the ditching depth measuring device (40) that is in contact with the ground is close to the ditching device (30); and the ground contact point pressure measuring device (50) is connected to the ditching depth measuring device (40), and the ground contact point pressure measuring device (50) is adapted to measure the magnitude of a second acting force between the ditching depth measuring device (40) and the ground, the first acting force being toward the ground. The soil compaction measuring apparatus (1) and the measuring method can achieve the real-time measurement of soil compaction information during the operation of agricultural machinery.

IPC Classes  ?

• G01N 19/00 - Investigating materials by mechanical methods
• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass

Abstract

A biosensing platform for in-situ sampling and target detection on the basis of upconversion luminescence. The biosensing platform comprises an upconversion luminescence paper-based microfluidic device for in-situ sampling of a target to be detected; an upconversion luminescence biosensor for target specificity recognition of the target to be detected; and a portable detection device on the basis of smart phone (4) imaging for detecting the content of the target to be detected. A method for preparing the upconversion luminescence biosensor comprises the following steps: S1, preparing upconversion nanoparticle seeds; S2, preparing upconversion nanoparticles with a core/shell structure; S3, preparing upconversion nanoparticles (UCNPs) with core/shell/shell structure; S4, performing hydrophilic modification on the UCNPs; S5, modifying the UCNPs after the hydrophilic modification with DNA; and S6, modifying the particles obtained in step S5 with dye. The biosensing platform can achieve the quick on-site quantitative detection of 17β-estradiol (17β-E2).

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence
• G01N 21/84 - Systems specially adapted for particular applications
• G01N 21/01 - Arrangements or apparatus for facilitating the optical investigation

Abstract

Provided in the present invention are a combine-harvester big data reconstruction method, and an apparatus. The method comprises: on the basis of a fuzzy clustering framework, describing a parameter association relationship of combine-harvester complete data by using a Kriging method, and inferring the real values of a null value, an outlier and an abnormal value according to an association relationship among data parameters, and information such as a space distribution density and a mean value of the data. In the apparatus, a data input module is used for acquiring field operation data of agricultural machinery; a data reconstruction module is used for receiving combine-harvester big data inputted by the data input module, and reconstructing the data according to a combine-harvester big data reconstruction method; a data output module outputs reconstructed data of the combine-harvester big data; and a data storage module is used for storing original data of the combine-harvester big data, the reconstructed data of the combine-harvester big data and a membership matrix of the combine-harvester big data. The precision of combine-harvester big data reconstruction is improved, a data support is provided for subsequent combine-harvester big data modeling and analysis tasks.

IPC Classes  ?

• G06F 18/2337 - Non-hierarchical techniques using fuzzy logic, i.e. fuzzy clustering

Abstract

Disclosed are a multi-pole few-slot unitized permanent magnet hub motor and a coordinated control system and method. The motor is composed of N same motor units evenly distributed in the circumferential direction of a radial cross section, each 1/N outer rotor is divided in the axial direction into M rotor sections which are the same, and the M rotor sections are arranged as sequentially rotating one mechanical dislocation angle in the same rotating direction. A constant torque area is divided into a first area and a second area, and a constant power area is divided into a third area to an eighth area. The control system comprises two control modules, each control module is composed of a power electronic switch, a DSP controller and an inverter which are sequentially connected in series, and input ends of two power electronic switches are respectively connected to an output end of a battery. An output end of each inverter is separately connected to N/2 winding electronic switches, one winding electronic switch controls a centralized winding in one motor unit to turn on and off, and mutually independent winding electronic switches implement independent control of the motor unit, thereby improving motor control freedom and increasing operating efficiency.

IPC Classes  ?

• H02K 21/22 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
• H02K 21/02 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets - Details
• H02K 1/279 - Magnets embedded in the magnetic core
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Abstract

The present invention provides a 4D printing technology-based multi-response variable-structure wheel, and a vehicle. The multi-response variable-structure wheel comprises a hub, spokes, rims, rollers, a tire and electric heating layers; two ends of each spoke are connected to the hub and a rim respectively; the rims are installed on the tire; a row of holes are formed in the outer side of each rim, and the rollers are installed on rotating shafts in the holes and make contact with the inner side of the tire; the base material of the rims is a photoresponsive shape memory polymer, and the rims are manufactured by means of 4D printing technology; the electric heating layers are arranged in the rims, and the shape of the rims can be changed on the basis of stimulation of light or electricity. In the present invention, on the basis of the photoresponsive shape memory polymer and the mode of embedding the electric heating layers therein, the wheel can achieve rapid conversion from a wheel-type movement mode to a track-type movement mode when given light or electricity stimulation by humans in a complex environment, thus integrally improving the passing capability of the wheel.

IPC Classes  ?

• B60B 19/02 - Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group convertible, e.g. from road wheel to rail wheel; Wheels specially designed for alternative use on road and rail

Abstract

The present invention relates to the technical field of metal material processing, and provides a physical simulation method for the forging process of a nickel-based superalloy. In the present invention, a nickel-based superalloy sample is sequentially subjected to heating, heat preservation, and a quenching treatment, so as to obtain a pretreated sample; and the pretreated sample is then sequentially subjected to heating, first heat preservation, cooling, a repeated compression-cooling treatment, second heat preservation, and a quenching treatment to obtain a simulated sample, wherein the number of times of the repeated compression-cooling treatment is 3 or more. In the present invention, the forging process of a nickel-based superalloy is simulated by using a forging simulation mode of multi-pass compression-cooling deformation, which is close to an actual forging process, and has a good simulation effect and high operability; moreover, the operation steps are simple, and the method is applicable to various nickel-based superalloys to be forged by using the same forging method; the structure and the hardness of the obtained simulated sample are slightly different from those of the same portion of a forged part obtained by means of actual forging; therefore, the method can provide effective guidance for the forging machining process of a nickel-based superalloy.

IPC Classes  ?

• C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
• C22F 1/02 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
• B21J 5/00 - Methods for forging, hammering, or pressing; Special equipment or accessories therefor
• G01N 1/28 - Preparing specimens for investigation
• G01N 1/44 - Sample treatment involving radiation, e.g. heat

Abstract

The present invention belongs to the field of bio-based polymer materials. Disclosed are a daidzein bio-based phenolic resin, a preparation method therefor, and an application thereof. The present invention utilizes daidzin, a low-cost natural compound which has abundant sources, in order to reduce costs. At the same time, the preparation method provided by the present invention is simple to operate, and the daidzein bio-based phenolic resin prepared in the present invention has excellent mechanical properties and heat resistance, and can be widely used for manufacturing in industries such as adhesives, flame retardant materials, sanding pads, etc.

IPC Classes  ?

• C08G 8/00 - Condensation polymers of aldehydes or ketones with phenols only
• C08G 8/24 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with mixtures of two or more phenols which are not covered by only one of the groups
• C08G 8/08 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ

Abstract

The present invention relates to the technical field of food additive manufacturing. Disclosed are a food additive manufacturing apparatus and method combining multi-frequency ultrasound and multiple nozzles. On a multi-nozzle additive manufacturing device, a multi-frequency ultrasound-based printing system is provided. A cavitation effect is generated by means of ultrasonic high-frequency vibration, so that the rheological properties of high-viscosity and large-particle food ink are improved, and the printability of the food ink is improved while the nutritional ingredients and textures of the food ink are preserved. The apparatus combining multi-frequency ultrasound and multiple nozzles is applied to food additive manufacturing, can realize a smaller nozzle diameter and a higher printing speed compared with a conventional additive manufacturing system, and can realize large-scale production while improving the smoothness of a food ink printing process. According to the food additive manufacturing apparatus and method combining multi-frequency ultrasound and multiple nozzles provided by the present invention, the digestion characteristics and functional characteristics of food can be improved by means of multi-frequency ultrasound, and the sensory experience and nutritional quality of a printed product are enhanced.

IPC Classes  ?

• A23P 30/25 - Co-extrusion of different foodstuffs
• B29C 64/20 - Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering - Details thereof or accessories therefor
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• B06B 3/02 - Processes or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic or ultrasonic frequency involving a change of amplitude

Abstract

The present invention relates to the field of ultra-precision machining, and in particular to a mechanical-laser interactive polishing and strengthening method for a sprayed ceramic coating. The method comprises: firstly, using mechanical polishing means to remove pits and protrusions visible to naked eyes on the surface of an original ceramic coating, and remelting and eliminating pits and unmelted particles formed after the mechanical polishing by using a nanosecond pulse laser because of the higher porosity of the ceramic coating and the characteristic of susceptibility to exfoliation of a plate layer. Mechanical polishing is carried out again to remove a raised remelted layer portion and splashes caused by plasma explosion. By repeating the mechanical-laser interactive polishing method, the surface roughness of a ceramic layer is continuously reduced, and a uniform dense remelted layer is formed to increase the surface strength of a coating. The present invention can be applied to polishing and strengthening treatment of the surface of a sprayed ceramic coating.

IPC Classes  ?

• C23C 4/18 - After-treatment
• C23C 4/12 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
• C23C 4/10 - Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
• C22F 3/00 - Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Abstract

Disclosed in the present invention are a multi-agent federated reinforcement learning-based vehicle-road collaborative control system and method under a complex intersection. A vehicle-road collaborative control framework based on a road-end static processing module and a vehicle-end dynamic processing module is provided, and road historical information is supplemented by utilizing road-end advantages; a federated reinforcement learning algorithm FD3 is provided and used for connecting a reinforcement learning module and a federated learning module; the algorithm only transmits neural network parameters rather than vehicle-end data, and thus privacy is protected. The algorithm only selects some neural networks for aggregation, and thus the communication overheads are reduced; a network having a small Q value is selected for aggregation, and overfitting is thus prevented; deep combination of federated learning and reinforcement learning is achieved: an RSU neural network participates in aggregation but does not participate in training, and instead of experience generated by the vehicle end, only an aggregated shared model is used for updating. The privacy of the vehicle end is protected, and the convergence of neural networks is slowed down; only some neural networks are selected to participate in aggregation, and thus the network aggregation cost is reduced.

IPC Classes  ?

• G05D 1/02 - Control of position or course in two dimensions

Abstract

A linear multi-rotor plant protection unmanned aerial vehicle structure based on tilt rotors and a control method therefor. The structure comprises main lifting power structures, tilt power structures and a main rack structure, wherein the main rack structure is located in a middle section, the main lifting power structures are distributed at left and right ends of the main rack structure, and the tilt power structures are symmetrically distributed between the main rack structure and the main lifting power structures; and a vector power structure. The pose changes flexibly, it can be guaranteed that the operation of an unmanned aerial vehicle is smoother and more accurate, the operating efficiency is improved, and the structure is suitable for a complex operating environment having a varied terrain in China.

IPC Classes  ?

• B64C 27/08 - Helicopters with two or more rotors

Abstract

A selective laser melting gradient powder recovery apparatus and a recovery method. The apparatus comprises an ultrasonic powder suction apparatus (1), a vertical support frame (2), a first vacuum pump (5), a sealing apparatus (6), a second rotating motor (7), a powder storage bag, a vacuum box (9), a vibrating screen (10), a waste tank (11), a second vacuum pump (12), a powder conveying pipe (13), a cooling apparatus (14), a water tank (15), and a spiral powder conveying pipe (16). According to the present invention, the risk of metal powder explosion is effectively reduced by means of cooling of the cooling apparatus (14), and optimal gradient powder is obtained by means of multiple times of vibration screening. The apparatus is simple in structure and high in controllability, operation conditions are easy to achieve, mixing adhesion of different powder is effectively avoided, a recovery rate of gradient powder is increased, manufacturing of gradient materials having different components is achieved, the contact between powder and air is reduced by means of vacuum operation, and workers do not need to be in direct contact with the powder, thereby avoiding damage to health of the workers.

IPC Classes  ?

• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B22F 10/73 - Recycling of powder
• B22F 12/20 - Cooling means
• B22F 12/90 - Means for process control, e.g. cameras or sensors
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 30/00 - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Details thereof or accessories therefor
• B07B 9/00 - Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
• B07B 1/28 - Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting, or wobbling screens

Abstract

A reciprocating abrasive flow polishing device based on a cavitation effect. A lower sealing plate (3) is hermetically connected to an opening at an upper end of a lower box body (1), and the lower sealing plate (3) can move up and down along an inner wall of the lower box body (1); an opening at a lower end of an upper box body (11) is hermetically connected by means of an upper sealing plate (8); a workpiece (5) to be machined is arranged between the upper sealing plate (8) and the lower sealing plate (3), and a rapid heater (2) is arranged at the bottom of an inner cavity of the box body (1); a piston (18), which is matched with an inner wall of the upper box body (11) and can move up and down, is arranged in an inner cavity of the upper box body (11), and the piston (18) is fixedly connected to the top of the upper box body (11) by means of a spring (17); and the rapid heater (2) heats a liquid, the spring (17) is compressed and rebounds, and the liquid flows across a surface of an inner hole of said workpiece (5). A polishing method of a reciprocating abrasive flow polishing device based on a cavitation effect is also included. By means of the reciprocating abrasive flow polishing device and the polishing method thereof, liquid flows bidirectionally in an inner hole, thereby reducing the kinetic energy loss of the liquid when flowing through an elongated hole and mitigating the non-uniform roughness of inner surfaces of two ends of the hole.

IPC Classes  ?

• B24B 31/116 - Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
• B24B 31/12 - Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group
• B24B 49/16 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
• B24B 41/06 - Work supports, e.g. adjustable steadies
• B24B 55/00 - Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition

Abstract

The present invention provides an electrolytic capacitor-free power converter for a permanent magnet synchronous motor, and a control method therefor. The power converter comprises a rectifier circuit, a power decoupling circuit and a three-phase inverter bridge which are sequentially connected in series. The power decoupling circuit comprises a Boost converter and a pulsating power buffer circuit, and non-equivalent small-capacity film capacitors at two circuit output ends are connected in series to form a direct-current bus of the electrolytic capacitor-free power converter. The Boost converter is used for controlling the quality of electric energy of a power grid, and a capacitor voltage output by the Boost converter contains direct current and alternating current components. The pulsating power buffer circuit realizes voltage complementation between the non-equivalent film capacitors by controlling the pulsating power of the power grid, thereby effectively inhibiting the voltage pulsation of the direct-current bus. In addition, the electrolytic capacitor-free power converter of the present invention improves a voltage gain of the direct-current bus, and broadens the range of a rotating speed of the permanent magnet synchronous motor.

IPC Classes  ?

• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The present invention relates to the technical field of quick food detection, and provides a preparation method for and a use of a metal organic frameworks (MOFs)-based composite pretreated material for eliminating capsaicin (CAP) interference. First, an MOFs suspension is prepared; ammonia water is added to an iron salt solution, and centrifuging, washing, drying and re-dispersing are performed to obtain a magnetic nanoparticle suspension; the magnetic nanoparticle suspension is mixed with the MOFs suspension, the mixture is heated, and centrifuging, washing, drying and re-dispersing are performed to obtain a magnetic material modified MOFs suspension; and the magnetic material modified MOFs suspension is added to an amidated polysulfone solution, and liquid drops are prepared and then solidified in water to obtain an MOFs-based composite pretreated material. The MOFs-based composite pretreated material is used for detecting a spicy substance in a spicy hotpot seasoning that resists CAP interference. The prepared MOFs-based composite pretreated material can eliminate CAP interference, has high stability and a wider temperature application range, and provides reliable guarantee for real-time and on-site detection of the spicy substance in actual production.

IPC Classes  ?

• G01N 21/65 - Raman scattering

Abstract

The present invention relates to a compound-strengthened, heat-resistant and wear-resistant aluminum alloy and a preparation method therefor. In the compound-strengthened, heat-resistant and wear-resistant aluminum alloy of the present invention, an Al-Si-Cu-Mg alloy is used as a matrix, and microalloying elements for improving the heat resistance and a heat-resistant high-entropy alloy for improving the wear resistance are added thereto, such that compound strengthening is achieved. The preparation method comprises the main step characteristic involving implementing the following steps in sequence: smelting and alloying - gas-blowing refining - powder-spraying compounding - die casting - solid solution strengthening - water quenching - cryogenic aging compound heat treatment. A compound-strengthened, heat-resistant and wear-resistant aluminum alloy is prepared by adding a complex of microalloying elements and a high-entropy alloy to an aluminum alloy matrix; in addition, the precipitation of a heat-resistant and wear-resistant phase is promoted by means of a hot-cold combined treatment method after cast molding, such that the heat resistance and wear resistance of the material are synergistically improved.

IPC Classes  ?

• C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
• C22C 1/02 - Making non-ferrous alloys by melting
• C22C 1/03 - Making non-ferrous alloys by melting using master alloys
• C22F 1/043 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent

Abstract

23233 particle reinforced aluminum matrix composite. The method can solve the problem of reinforcement particle aggregation in the composite preparation process, particles of the prepared composite are uniformly dispersed, the interface between reinforcement particles and a matrix is clean, and excellent performance is achieved.

IPC Classes  ?

• C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
• C22C 1/10 - Alloys containing non-metals
• C22C 21/00 - Alloys based on aluminium
• C22C 1/06 - Making non-ferrous alloys with the use of special agents for refining or deoxidising

Abstract

An ultrasonic-assisted laser shock forming method and system for an aluminum alloy sheet. The method comprises the following steps: defining surfaces of an aluminum alloy sheet as an inner concave surface (6) and an outer convex surface (7) according to sheet bending forming requirements; subjecting the inner concave surface (6) to shock induced a pulsed laser beam (1), and additionally applying ultrasonic shock waves (2) on the outer convex surface (7) at a position corresponding to the laser shock processing; and synchronously moving the pulsed laser beam (1) and the ultrasonic shock waves (2) according to a traveling path to obtain an aluminum alloy sheet having bending curvature. The use of the ultrasonic-assisted laser shock forming technology achieves flexible dieless forming of aluminum alloy sheets, an acoustic softening effect generated by ultrasonic shock-induced high-frequency vibration can effectively improve the plastic forming ability of aluminum alloy sheets, and then macroscopic plastic forming of high-strength aluminum alloy sheets by means of laser shock processing is achieved.

IPC Classes  ?

• B23K 26/356 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
• B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
• B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
• C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
• B21D 26/06 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves

Abstract

Disclosed in the present invention is a method for reducing wind resistance of a vehicle wheel on the basis of a contour shape of a wheel spoke opening. The method comprises: step one, establishing an initial vehicle wheel spoke model; step two, constructing an initial vehicle wheel calculation model; step three, designing an experimental scheme; step four, on the basis of test data in step three, constructing a function relationship between a contour shape of a vehicle wheel spoke opening and an aerodynamic resistance coefficient of a vehicle wheel, and verifying the precision of the function relationship; and step five, obtaining, by using an optimization algorithm, the contour shape of the vehicle wheel spoke opening when the aerodynamic resistance coefficient value is the minimum. The beneficial effects are as follows: by means of the present invention, a new method for reducing wind resistance of a vehicle wheel is provided by taking a contour shape of a wheel spoke opening as a breakthrough point, such that the problem of blindness in the design of the contour shape of the vehicle wheel spoke opening is effectively avoided, a design cycle is shortened, and the efficiency is improved; in addition, the vehicle fuel economy is improved, and the pressure pulsation near the vehicle wheel is improved. Thus, the method is significant for guiding the design of the contour shape of a vehicle wheel spoke opening, so as to reduce the wind resistance of a vehicle, and improve the fuel economy.

IPC Classes  ?

• G06F 30/15 - Vehicle, aircraft or watercraft design
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A preparation method for and the use of a BiOX/N-doped biochar nano composite material, X being I or Br. The preparation method comprises the following steps: step 1, preparing N-doped biochar; step 2, preparing acidified N-doped biochar; and step 3, preparing a BiOX/N-doped biochar nano composite material. Waste lobster shells, crab shells or soybean curb residues are used as raw materials to prepare a BiOX/N-doped biochar nano composite material, thus achieving turning waste into wealth with respect to renewable biological resources; a photoelectric sensor constructed on the basis of the BiOX/N-doped biochar nano composite material achieves detection of ATP or escherichia coli.

IPC Classes  ?

• G01N 27/30 - Electrodes, e.g. test electrodes; Half-cells
• G01N 27/416 - Systems

Abstract

The present invention relates to a photocatalyst for overall water splitting under near-infrared light, in particular to a platinum single atom/cluster modified photosensitizing system, and a preparation method therefor and the use thereof. The preparation method comprises: first constructing a nickel phytate complex on the surface of carbon nitride by means of in-situ chelation or electrostatic adsorption to obtain a nickel phytate/carbon nitride composite system; and then, under the conditions of near-infrared light, subjecting platinum single atoms/clusters to selective photodeposition on the surface of carbon nitride in the nickel phytate/carbon nitride composite system by means of photosensitization to obtain a photocatalyst, and using same in an overall water splitting reaction under near-infrared light. The present invention has the following advantages: platinum single atoms/clusters can be obtained without additional high temperature, additional electric field and expensive and complex equipment; the obtained catalytic active sites are in one-to-one correspondence to the catalytic reaction process instead of being randomly distributed; and the loading of the platinum single atoms/clusters into a photosensitizing system is achieved by means of low-energy-consumption near-infrared light for the first time.

IPC Classes  ?

• B01J 31/02 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
• B01J 27/24 - Nitrogen compounds
• B01J 23/42 - Platinum
• C01B 3/04 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of inorganic compounds, e.g. ammonia

Abstract

The present invention provides a double-core-shell loaded microbial material as well as a preparation method therefor and the use thereof. The double-core-shell loaded microbial material is used for mineralizing heavy metals in polluted water. The preparation method for the double-core-shell loaded microbial material comprises the following steps: first, embedding a microbial liquid in an agar solution to obtain an agar-loaded microbial inner shell; then putting the agar-loaded microbial inner shell into a calcium chloride solution, so that the surface of the agar-loaded microbial inner shell is covered with a calcium chloride layer; and finally, embedding the agar-loaded microbial inner shell covered with the calcium chloride layer into a sodium alginate solution mixed with urea, so as to obtain the double-core-shell loaded microbial material. The double-core-shell loaded microbial material of the present invention is used for remedying heavy metal pollution, effectively solving the problem that urease-producing microorganisms cannot tolerate high-concentration heavy metals. The urea and microorganism can be separately embedded at the same time, thus solving the problems of provision of an external urea source and premature reaction. The present invention has wide industrial prospects and market value.

IPC Classes  ?

• C12N 11/04 - Enzymes or microbial cells immobilised on or in an organic carrier entrapped within the carrier, e.g. gel or hollow fibres
• C12N 11/10 - Enzymes or microbial cells immobilised on or in an organic carrier the carrier being a carbohydrate
• C12N 11/14 - Enzymes or microbial cells immobilised on or in an inorganic carrier
• C12N 1/20 - Bacteria; Culture media therefor
• C02F 3/34 - Biological treatment of water, waste water, or sewage characterised by the microorganisms used
• C12R 1/07 - Bacillus
• C02F 101/20 - Heavy metals or heavy metal compounds

Abstract

A driven gas-liquid separation startup device. A gas-liquid chamber (7) is in communication with a pump flow channel (8), and a rotating mechanism is provided in the gas-liquid chamber (7); a second cam mechanism is provided in a primary gas-liquid separation chamber (6), the primary gas-liquid separation chamber (6) is divided into several primary gas-liquid separation units by means of a primary gas-liquid separation chamber baffle (65) and the second cam mechanism, and several spiral gas-liquid separation mechanisms, which are in contact with the second cam mechanism, are provided in each primary gas-liquid separation unit; a first cam mechanism is provided in a natural suction chamber (10), a secondary gas-liquid separation chamber (5) is in rolling pair contact with the first cam mechanism by means of a support and connecting rod (3), and the volume of the secondary gas-liquid separation chamber (5) is changed by means of the rotation of the first cam mechanism, so as to perform again gas-liquid separation on a gas-liquid fluid mixture with a high gas content, which is obtained after separation in the primary gas-liquid separation chamber (6); and an exhaust cavity (9) is provided on the natural suction chamber (10).

IPC Classes  ?

• F04D 9/02 - Self-priming pumps
• F04D 29/00 - NON-POSITIVE-DISPLACEMENT PUMPS - Details, component parts, or accessories
• B01D 19/00 - Degasification of liquids

Abstract

The present invention relates to an absorption layer-adjustable laser peening forming device and method. The laser peening forming device comprises a laser peening strengthening system, an x-y-z three-axis machining platform, and a working tank. The working tank is fixed to the x-y-z three-axis machining platform, and the laser peening strengthening system is located above the working tank. A laser irradiation system and a three-dimensional information collector are further arranged above the working tank. A workpiece, a tool anode, a heating device and a temperature sensor are arranged in the working tank. The workpiece is connected to an electric box cathode, the tool anode is connected to an electric box anode, the tool anode is located above the workpiece and keeps a certain distance from the workpiece, and the working tank is connected to a phosphating solution flowing system. According to the present invention, a black phosphating film is deposited on the whole or local area of the workpiece by using a method of combining common warm phosphating and laser electrolytic phosphating, the laser thermal effect and the electrolytic phosphating technology are cooperated, deposition of a phosphating film in a specific area is achieved, phosphating reaction does not occur in other areas that do not require laser peening again, and the coating process of the absorption layer is simplified.

IPC Classes  ?

• C25D 9/04 - Electrolytic coating other than with metals with inorganic materials
• C25D 21/02 - Heating or cooling
• C25D 21/04 - Removal of gases or vapours
• C25D 21/12 - Process control or regulation

Abstract

ee is used for torque distribution; finally, in consideration of a mapping relationship between an additional yaw moment output by the controller and the coordination variable L, constructing a three-dimensional spatial curved surface; analyzing the effect of the coordination variable L on the overall efficiency of a hub electric motor; and determining a workflow of an adjuster for the coordination variable L, thereby improving the overall efficiency of the hub electric motor.

IPC Classes  ?

• B60W 30/02 - Control of vehicle driving stability
• B60W 50/00 - CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - Details of control systems for road vehicle drive control not related to the control of a particular sub-unit
• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed

Abstract

A method for preparing an aluminum alloy super-hydrophobic surface by flat-top laser peening. The method comprises the following steps: pretreating an aluminum alloy surface; evenly coating the pretreated aluminum alloy surface with a nanoscale carbon powder layer; by using square light spot flat-top nanosecond pulse laser and using the carbon powder layer as an absorption layer, performing non-constraint-layer peening treatment on the aluminum alloy surface, and enabling a light beam to be always kept perpendicular to the aluminum alloy surface; and removing residual carbon powder after peening, reducing the surface energy of the material by means of low-temperature heat treatment, and obtaining a super-hydrophobic aluminum alloy surface having a micro-nano multilevel structure.

IPC Classes  ?

• B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
• B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
• B23K 26/70 - Auxiliary operations or equipment

Abstract

Provided are a photocuring 4D printing method for a multilayer structure having an adjustable shape recovery speed, and a multilayer structure. The multilayer structure printed by the photocuring 4D printing method for a multilayer structure having an adjustable shape recovery speed comprises a plurality of deformation units; the plurality of deformation units are sequentially connected in series, and each of the deformation units comprises slow layers, a fast layer (3), and a transition layer (2); the fast layer (3) is disposed between two slow layers, and the transition layer (2) is disposed between at least one slow layer and the fast layer (3). A low cross-linked layer is doped with a carbon nano light-absorbing material, such that the problem that the low cross-linked layer is prone to over-curing by printing a high cross-linked layer to the low cross-linked layer is solved.

IPC Classes  ?

• B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• B33Y 10/00 - Processes of additive manufacturing
• B32B 33/00 - Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• B33Y 80/00 - Products made by additive manufacturing

Abstract

Disclosed in the present invention are a mechanical-electric-hydraulic composite drive device, and a control method therefor. The device comprises an input shaft assembly, a power-dividing assembly, a hydraulic drive assembly, an electrical continuously variable transmission drive assembly, a mechanical drive assembly, a power-combination assembly, and an output shaft. Three types of drive modes, i.e., a single-type drive mode, a power-dividing composite drive mode, and a power-combination composite drive mode can be achieved by means of controlling the switching of engagement between a clutch and a brake. The beneficial effects of the device lie in that free switching between various drive modes can be achieved, which can meet the multi-mode requirements of engineering machinery for a drive device under different working conditions, increase the engine power utilization, and improve the fuel economy; the impact of shifting is effectively reduced, and the speed ratio adjustment range is expanded; and the hydraulic drive starts quickly, operates smoothly, and it is easy to achieve rapid and impact-free speed change and reversing, and the electrical continuously variable transmission has a continuous drive ratio change process, and thus has little impact on the mechanism during use.

IPC Classes  ?

• F16H 47/08 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
• F16H 57/023 - Mounting or installation of gears or shafts in gearboxes, e.g. methods or means for assembly
• F16H 57/08 - General details of gearing of gearings with members having orbital motion
• F16H 57/10 - Braking arrangements

Abstract

The present invention relates to the field of combined machining in the special machining technology. Disclosed are a method and apparatus for preparing a functional gradient coating by using a laser-tuned current waveform. According to the present invention, by adjusting laser parameters, the current density can be increased, and the control of a current change waveform can be implemented. The laser-tuned current density is periodically and continuously changed, so that growth sections can be in corrugated meshing, and layer-to-layer interfaces are grown and embedded with each other, so that the tangential bearing stress is increased, and the stress does not abruptly change. In addition, a strong micro-area stirring effect formed by laser and a force impact effect can reduce the internal stress of the coating, increase the interlayer binding force and improve the comprehensive performance of the coating. The present invention is suitable for machining a high-quality functional gradient coating, and can be applied to special machining fields such as aerospace, mechanical engineering, and medical biology.

IPC Classes  ?

• C25D 5/18 - Electroplating using modulated, pulsed or reversing current

Abstract

Disclosed is a harmonic group-based method for analyzing and modulating the magnetic field coupling of a magnetic-field-modulated permanent magnet motor, pertaining to the field of motor design. In accordance with a permanent magnet excitation source comprising a permanent magnet and intermediate permanent magnet connected to an outer surface, and in accordance with an armature magnetic source being an outer armature winding, obtaining a reference magnetic density component of an outer air gap magnetic field of a motor; in accordance with a permanent magnet excitation source comprising a permanent magnet and intermediate permanent magnet connected to an inner surface, and in accordance with an armature magnetic source being an inner armature winding, obtaining a coupling magnetic density component of the outer air gap magnetic field; using air gap magnetic density to successively compute a coupling effect ratio, a harmonic characteristic factor and harmonic coupling efficiency; according to the harmonic coupling efficiency, judging positive and negative coupling harmonics, and using the positive and negative coupling harmonics to respectively construct corresponding positive and negative coupling harmonic groups and compute positive and negative coupling efficiencies; and using the positive and negative coupling efficiencies to analyze whether motor magnetic field coupling satisfies requirements; the present invention achieves effective utilization of a coupling harmonic forward-direction effect, and achieves increased motor torque capacity by improving air gap magnetic density harmonic coupling characteristics.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A method for preparing a shrimp paste on the basis of fast fermentation strengthened with combined strains, and the shrimp paste prepared by same. The method comprises the following steps: (1) crushing Acetes chinensis to obtain a shrimp pulp, adding edible salt, and uniformly stirring same to obtain a minced shrimp mixture; (2) preparing a Cladosporium Z3 spore suspension; (3) preparing a Enterococcus faecalis X1 spore suspension; (4) inoculating the Cladosporium Z3 spore suspension into the minced shrimp mixture for first-step fermentation to obtain a primary fermentation product; and (5) inoculating the Enterococcus faecalis X1 spore suspension into the primary fermentation product for second-step fermentation to obtain a shrimp paste.

IPC Classes  ?

• A23L 27/60 - Salad dressings; Mayonnaise; Ketchup
• A23L 27/24 - Synthetic spices, flavouring agents or condiments prepared by fermentation
• A23L 17/40 - Shell-fish
• C12N 1/14 - Fungi ; Culture media therefor
• C12N 1/20 - Bacteria; Culture media therefor
• C12N 1/02 - Separating microorganisms from their culture media
• C12R 1/645 - Fungi
• C12R 1/01 - Bacteria or actinomycetales

Abstract

Provided are a hybrid power driving apparatus for a hybrid electric vehicle, and a control method therefor. The hybrid power driving apparatus comprises an engine (1), an auxiliary electric motor assembly (2), a main driving electric motor assembly (3), an output shaft (4) and a differential assembly (5), wherein the auxiliary electric motor assembly (2) is connected to the engine (1), and the engine (1) and the main driving electric motor assembly (3) are connected to the differential assembly (5) by means of the output shaft (4). Switching between output working modes is realized by means of cooperation between the engine (1), the auxiliary electric motor assembly (2) and the main driving electric motor assembly (3); in addition, according to working state information of the assemblies of the hybrid power driving apparatus, intention information of a driver, and operation condition information of a vehicle, an output working mode is allowed to have two gear changes by means of a gear shifting actuation apparatus (6), such that the adaptability of the whole hybrid power driving apparatus to different working conditions is improved, the fuel consumption of the whole vehicle is reduced, the smoothness of driving and driving comfort are improved, and the hidden danger of power interruption of the hybrid power driving apparatus during a gear shifting process is prevented.

IPC Classes  ?

• B60K 6/547 - Transmission for changing ratio the transmission being a stepped gearing
• B60K 6/36 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
• B60W 10/11 - Stepped gearings 
• B60W 20/30 - Control strategies involving selection of transmission gear ratio

Abstract

A method and system for weakly-supervised sound event detection by using self-adaptive hierarchical aggregation. The system comprises an acoustic model and a self-adaptive hierarchical aggregation algorithm module (5); the acoustic model inputs an audio signal that has undergone preprocessing and feature extraction, the acoustic model predicts to obtain a frame level prediction probability, and the self-adaptive hierarchical aggregation algorithm module (5) aggregates the frame level prediction probability to obtain a sentence level prediction probability; the acoustic model and relaxation parameters are combined and optimized, optimal model weight and optimal relaxation parameters are obtained, and an optimal aggregation policy is formulated for each type of sound event according to the optimal relaxation parameters; and an unknown audio signal that has undergone preprocessing and feature extraction is inputted, frame level prediction probabilities of all target sound events are obtained, and sentence level prediction probabilities of all target sound event categories are obtained according to the optimal aggregation policy for each type of target sound event. The described method is applicable for complex acoustic environments, being applicable for audio classification and positioning in weakly-supervised sound event detection while also demonstrating strong versatility.

IPC Classes  ?

• G10L 25/51 - Speech or voice analysis techniques not restricted to a single one of groups specially adapted for particular use for comparison or discrimination

Abstract

The present invention provides a high sensitivity terahertz sensor, comprising a substrate; a metal microstructure array, comprising a plurality of metal microstructure units, the metal microstructure array covering the substrate to form a metasurface; and metal nanostructures, the metal nanostructures being located at gaps of the metal microstructure array, and the metal microstructure array and the metal nanostructures being both formed by direct writing and etching of a metal thin film on the substrate by means of pulsed laser. According to the present invention, terahertz waves are cooperatively enhanced by the metasurface and the metal nanostructures, the full action of the terahertz waves and an analyte is promoted, and the terahertz detection sensitivity is improved.

IPC Classes  ?

• G01N 21/3586 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
• B82Y 40/00 - Manufacture or treatment of nanostructures
• B23K 26/354 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
• B23K 26/70 - Auxiliary operations or equipment

Abstract

The present invention relates to the field of biotechnology, and specifically relates to a complement activated C1s enzyme fluorescence detection kit, a detection method, and the use. According to the present invention, a complement activated C1s enzyme fluorescence detection kit, a detection method, and the use are established for the purpose of detecting the enzyme activity level of complement activated C1s in a sample. In the present invention, on the basis of magnetic beads precoated with a recombinant C1s antibody, C1s in a C1s standard or in a sample to be detected is specifically captured; magnetic separation is performed to remove a non-specific conjugate, an activated C1s enzyme digested substrate peptide labeled with a FRET fluorescent substance is added, and then a fluorescence signal in a reaction system is detected by using a microplate reader; quantitative detection is performed on the enzyme activity of the activated C1s by detecting the change of fluorescence intensity. The present invention has the characteristics of high sensitivity, strong specificity, small error, simple and convenient operation, etc. The enzyme activity after activation of C1s in human or animal blood and body fluids can be detected so as to accurately evaluate the classical activation state of the complement in the body.

IPC Classes  ?

• C07K 16/40 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against enzymes
• G01N 33/573 - Immunoassay; Biospecific binding assay; Materials therefor for enzymes or isoenzymes
• G01N 33/543 - Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
• G01N 33/58 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
• G01N 33/68 - Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids

Abstract

The present invention provides a two-stage cavitation generator for organic wastewater treatment. The two-stage cavitation generator comprises a closed impeller, a stator, and a rotor; the closed impeller comprises a front cover plate, blades, and a rear cover plate; and a plurality of blades are uniformly distributed between the front cover plate and the rear cover plate; working surfaces of the blades are arced surfaces, and back surfaces of the blades are partially protruding, causing a flow channel between the back surface of each blade and the working surface of an adjacent blade to be partially narrowed and form a throat structure; the stator and the rotor are arranged at an outlet of the closed impeller, and the stator is located at the outer periphery of the front cover plate and fixed to an inner wall of a volute; the rotor is mounted on the rear cover plate, a gap is present between the stator and the rotor, and blind holes are respectively provided on the stator and the rotor at two sides of the gap and used for secondary cavitation. Two-stage cavitation can be periodically generated in an environment of one unit of atmospheric pressure, the cavitation intensity is markedly improved, a certain conveying capacity is also achieved, and the present invention is highly adaptable and has great value for organic wastewater treatment.

IPC Classes  ?

• C02F 1/34 - Treatment of water, waste water, or sewage with mechanical oscillations
• B01J 19/00 - Chemical, physical or physico-chemical processes in general; Their relevant apparatus

Abstract

Disclosed in the present invention are a gas-assisted atomizing nozzle and a sprayer comprising same. The gas-assisted atomizing nozzle comprises a rear cover body, a middle sleeve and a front sleeve. An annular air cavity is formed between the middle sleeve and a central liquid pipe. A peripheral liquid cavity is formed between the front sleeve and a conical cylinder section. An inner ring liquid cavity is formed between the tip of the conical cylinder section and an inner surface of a cover plate. Compressed air enters a nozzle outlet area through the annular air cavity. Liquid enters the nozzle outlet area through a central liquid cavity and the peripheral liquid cavity. Compressed air and liquid are mixed and atomized in the nozzle outlet area, and sprayed towards the external space. By means of the structural design of the nozzle of the present application, liquid forms a multi-liquid-hole axial jet flow and an annular radial jet flow through two liquid flow channels in the nozzle, respectively. Compressed air forms an axial high-speed airflow through the nozzle, and the axial high-speed airflow forms multi-liquid-hole coaxial mixed atomization and non-coaxial mixed atomization with the multi-liquid-hole axial jet flow and the annular radial jet flow, respectively, so that the aims of a large spray flow, small droplet size and low energy consumption are achieved.

IPC Classes  ?

• B05B 7/04 - Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
• B05B 1/34 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl

Abstract

Provided are a dynamic antibacterial hydrogel based on a natural receptor ligand recognition effect, a preparation method and use, which belong to the field of biomedical materials. First, a modification material is used to modify the ligand vancomycin and a receptor AA-based material, then a photoinitiator is added, and a hydrogel material is obtained under ultraviolet irradiation. The hydrogel undergoes cross-linking to form a three-dimensional network structure. After the hydrogel breaks under external pressure, it rapidly undergoes cross-linking and self-heals due to interactions between the ligand and the receptor and multiple hydrogen bond interactions. The healing mimics natural ligand-receptor interactions and the dynamic properties of the hydrogel material are achieved. The efficient sterilization ability of vancomycin shows the functionality of the hydrogel material. The monomer of physiological origin improves its biocompatibility and reduces biotoxicity. With the combination of the dynamic properties, functionality and biological properties, the hydrogel applies for antibacterial and bacteriostatic purposes and to skin repair.

IPC Classes  ?

• A61L 26/00 - Chemical aspects of, or use of materials for, liquid bandages
• C08J 3/075 - Macromolecular gels
• C08L 53/00 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• C08F 299/02 - Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates

Abstract

Provided are a method for preparing a heavy metal passivation material, and a porous biological calcium carbonate-based passivation material with urease activity acquired by means of the method. Based on some specific components, the passivation material exerts the heavy metal adsorption functionality of the porous biological calcium carbonate and maintains the urease activity in an environment with high heavy metal concentrations to continuously exert a biological mineralization effect on the residual heavy metals, thus exhibiting dual passivation effects by means of adsorption and mineralization in heavy metal repair. The present invention significantly improves the resistance to heavy metals, solves the heavy metal concentration limit in conventional MICP technology, and features superior adsorption capacity for heavy metals. The passivation material can be applied to heavy metal repair, and can prevent secondary heavy metal contamination by means of providing a supplementary calcium source after the heavy metal passivation.

IPC Classes  ?

• C12N 1/20 - Bacteria; Culture media therefor
• C12N 11/14 - Enzymes or microbial cells immobilised on or in an inorganic carrier
• B01J 20/02 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
• C02F 3/34 - Biological treatment of water, waste water, or sewage characterised by the microorganisms used
• C02F 101/20 - Heavy metals or heavy metal compounds
• C12R 1/07 - Bacillus

Abstract

A preparation method and application of a double-electric-field driving sensor. A flexible printed substrate is manufactured by adopting a flexible printed circuit technology, and double-electric-field distribution is effectively adjusted by using a plurality of electrode arrays on the flexible printed electrode. The sensor is endowed with good biocompatibility, catalytic performance and conductivity by modifying RGO and gold nanoparticles on the surface of the electrode. Moreover, a pesticide antibody is introduced to selectively identify pesticide molecules, microflow and particles in a solution can directionally move under the condition of external double-electric-field driving, and an analyte can quickly flow to the surface of a biosensor, such that the binding efficiency of the analyte and a probe on the surface of the sensor is improved, and the reaction time is shortened. The complementary double-electric-field mode can effectively prevent bubbles from being generated on the surface of the sensor due to overlarge voltage, such that a more effective electric field enhancement strategy is established, and the sensitivity and the detection efficiency of the sensor are improved.

IPC Classes  ?

• G01N 27/48 - Systems using polarography, i.e. measuring changes in current under a slowly-varying voltage
• G01N 27/327 - Biochemical electrodes

Abstract

A pulse current-assisted aluminum alloy laser peening forming and hydrophobic surface preparation method. The preparation method comprises the following steps: a pretreated aluminum alloy is placed on an impact platform (1), and electrodes (3) are respectively mounted on both ends of the aluminum alloy; a surface of the aluminum alloy material serves as an absorption layer, and a flowing silicone oil covered with the surface of the aluminum alloy serves as a restraint layer; laser energy is determined; a high-frequency pulse current is applied to the surface of the aluminum alloy by means of an electrode (3), a peening laser generates laser beams according to the laser energy to impact the surface of the aluminum alloy, the aluminum alloy forms a bent arc surface under the action of electric pulse and laser impact, and a porous micro-nano multistage surface is formed on the impact surface of the aluminum alloy; and the impact surface of the aluminum alloy is chemically modified to reduce the surface energy of the material, so as to obtain a super-hydrophobic arc-shaped aluminum alloy surface. The method can synchronously complete shape control and property control to the aluminum alloy material and the surface appearance, such that an aviation aluminum alloy plate matrix is effectively strengthened.

IPC Classes  ?

• B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
• C21D 1/09 - Surface hardening by particle radiation
• C21D 1/00 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
• B21D 26/06 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
• C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working

Abstract

Disclosed in the present invention is a multi-set multi-disk multi-air-gap linked adjustment type magnetic coupler, comprising multiple movably connected composite disks, each composite disk comprising a conductor rotor set and a permanent magnet rotor set, wherein the permanent magnet rotor set comprises two permanent magnet yoke iron disks connected to each other and movable relative to each other in an axial direction, and permanent magnets respectively arranged on two permanent magnet yoke iron disk surfaces; and the conductor rotor set comprises two conductor yoke iron disks fixedly connected to each other, and conductors respectively arranged on two conductor yoke iron disk surfaces. In the present invention, the conductor rotor sets are used as driving ends, the permanent magnet rotor sets are used as driven ends, and vice versa; each composite disk forms two air gap lengths and forms multiple sets of air gap lengths with other composite disks; in addition, a single set of driven end rotors are driven by a speed adjustment device to realize axial relative displacement, and multiple air gap lengths of the multi-set multi-disk magnetic coupler are subjected to linked adjustment, so that the purpose of speed adjustment or torque change of the magnetic coupler is realized. By means of the structure, a large electromagnetic torque and a high power can be obtained, and thus the structure can be applied to occasions where there is a large axial size but a limited radial size, such as on ocean platforms and large vessels.

IPC Classes  ?

• H02K 49/10 - Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
• H02K 16/00 - Machines with more than one rotor or stator
• H02K 7/12 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking

Abstract

The present invention relates to a flow-induced vibrational energy collecting apparatus, specifically to a bluff body non-rotating flow-induced vibrational energy harvesting apparatus. In the aspect of bluff body design, the present invention does not use a common design method in which a bluff body and an elastic beam are rigidly and fixedly connected, and the bluff body and the elastic beam are connected by means of using a rotating shaft and a connecting shaft. Because a kinematic pair at a connection is a revolute pair, the bluff body will only vibrate transversely and will not rotate, thereby achieving the effect of increasing the amplitude at the same frequency, and finally, achieving an increase in converted electric energy and improving conversion efficiency.

IPC Classes  ?

• H02N 2/18 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Abstract

Disclosed in the present invention is a preparation method for a laser-induced carbonization layer in an aramid fiber reinforced polymer. The preparation method comprises: wiping the surface of an aramid fiber reinforced polymer sample by using absolute ethyl alcohol; placing the aramid fiber reinforced polymer sample on a sample platform of a laser, wherein the defocusing amount of a laser focus and the upper surface of the sample is a negative defocusing amount; scanning the aramid fiber reinforced polymer sample multiple times by using an infrared picosecond laser, wherein most energy of the laser penetrates through an epoxy resin layer to directly act on internal aramid fibers on the basis of the extremely low laser absorptivity of the surface-layer epoxy resin, the internal aramid fibers are carbonized by the laser without any damage to the surface-layer resin, and a carbonization route is formed along with a laser scanning path, such that the electrically conductive function of the aramid fiber reinforced polymer is achieved. The carbonization layer can replace a traditional conductor in spaceflight equipment to achieve an electrically conductive function, is helpful for promoting the lightweight design of a spacecraft and saving on a large amount of space therein, and has a potential application value in the aspect of electromagnetic wave stealth of the spacecraft.

IPC Classes  ?

• C08J 7/12 - Chemical modification
• C08L 77/10 - Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids

Abstract

A two-dimensional material strain test device and method based on piezoelectric ceramic. The device comprises a fastening device, a driving device, a test device, and a power box (5). The test device is a flexible strain sensor (11); the fastening device consists of two clamping devices and a flexible substrate (10), the flexible substrate (10) and the flexible strain sensor (11) are stacked vertically without contacting with each other, and both ends of the flexible substrate and the flexible strain sensor are respectively clamped by the two clamping devices; the driving device comprises first piezoelectric ceramics (1), second piezoelectric ceramics (2), first structural members (3) and second structural members (4), the two first structural members (3) are respectively located on two sides of the fastening device and are fixed in positions, and two sides of each second structural member (4) are connected to a respective first structural member (3) by means of a second piezoelectric ceramic (2); the two first piezoelectric ceramics (1) are respectively arranged between the two first structural members (3) and the two clamping devices; and the power box (5) supplies power respectively to the driving device and the test device. The device and the method can carry out repeated tests on the same sample, the test is controllable and reversible and has high result precision, and the experiment requirements in various environments such as room temperature, low temperature and magnetic fields can be satisfied.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01B 7/16 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge

Abstract

The present invention relates to the technical field of laser shock strengthening, and in particular to a method for real-time coupling strengthening of an electrical pulse and a laser shock wave. By means of controlling a matching relationship between start moments and durations of an electrical pulse and a laser shock wave, the electrical pulse and the laser shock wave can perform real-time coupling strengthening on a material, so that the bidirectional depth of the plasticity and strength of the material is improved, and large-area uniform strengthening of a part is realized. By means of simultaneously introducing the effect of an electrical pulse during the process of performing pulse current-assisted laser shock strengthening, composite deep strengthening of the electrical pulse and pulse current-assisted laser shock strengthening is achieved in a short period of time, so that internal defects of the material are repaired to a certain extent, and the fatigue life of the material is further prolonged.

IPC Classes  ?

• C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
• C22F 3/00 - Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Abstract

Disclosed is a silicon-based cavity recess for chip liquid cooling heat dissipation. A cavity recess provided with a micro-column array is etched on a semiconductor silicon wafer, cylindrical arrays having a uniform diversion function are manufactured upstream and downstream from the cavity recess, and the semiconductor silicon wafer and a semiconductor silicon wafer cover plate are bonded to form a wide-channel structure. A liquid cooling working medium flows into a liquid inlet hole and is then divided to flow into a wide cavity recess channel; a chip is cooled in the channel by means of boiling steam-liquid two-phase flow, and then the liquid cooling working medium flows out of a liquid outlet hole. In the present invention, the heat exchange performance of liquid-phase boiling and liquid film evaporation in a flow boiling process can be maintained and greatly enhanced, and the phenomena of working medium backflow and local "burning" in the boiling process are remarkably inhibited. The cavity recess cooling structure provided with a micro-column array in the present invention can be directly integrated with a semiconductor silicon-based chip with strong replicability and portability, which can effectively reduce the production of local hot spots of a chip, guaranteeing chip performance and even the safety and reliability of the entire system. The cavity recess cooling structure is characterized by a simple structure, good heat dissipation performance, and high stability.

IPC Classes  ?

• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids

Abstract

The present invention relates to the field of fluid machinery, and relates to a multi-stage pump for improving anti-blocking and anti-wear performances by utilizing internal circulation high-pressure water jet. Due to the fact that the situation that a multi-stage pump transports sand-containing water is relatively common, the problems such as abrasion, wear, and operation jamming of a key hydraulic component are always key problems restricting the high-speed development of the multi-stage pump. A drainage pipe is combined with a jet ring, and a pressure difference is used for leading out internal circulation high-pressure water to impact a gap part of an impeller outlet and a pump housing, such that solid particles are prevented from being deposited in a front pump cavity to cause wear or operation jamming, meanwhile, the secondary backflow is inhibited, and the hydraulic performance is improved. The invention is mainly used in industries, in which transport mediums contain solid particles, such as deep-sea mineral exploration, mine drainage and sand discharge, and sewage treatment.

IPC Classes  ?

• F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
• F04D 29/44 - Fluid-guiding means, e.g. diffusers

Abstract

Disclosed are a leaf in-situ dark adaptation device and method for chlorophyll fluorescence monitoring. The device comprises an outer box and an inner box; ventilation holes arranged alternately are formed in the peripheries of the outer box and the inner box of the device; push-pull movable doors are designed on two sides of the outer box; a round hole allowing plant leaf stems to pass through is formed in the center of each door; the bottom of the outer box is connected to the inner box by means of an air exchange cylinder; an air exhaust fan is arranged in the air exchange cylinder; air enters the inner box from the air holes in the periphery of the outer box and is pumped out from the fan to form air circulation in the device. The inner box is also provided with detachable push-pull doors, a temperature module, and a humidity module, and the height and angle of a support are configured to adjust the position of the device so as adapt to growth angles of plant leaves. Inner and outer box sliding doors of the device are connected by means of grooves therein so as to facilitate assembly and disassembly. Leaves can be conveniently placed in and taken out without damaging the normal life activity of a plant, and it is easy to disassemble and clean. According to the device, in-situ dark treatment can be carried out on plant leaves of any heights and angles, and leaf chlorophyll fluorescence parameters can be conveniently obtained in situ.

IPC Classes  ?

• G01N 21/64 - Fluorescence; Phosphorescence