Abstract

Disclosed are an apparatus for collecting mouse bronchoalveolar lavage fluid and a use method. The present invention pertains to the technical field of devices for collecting mouse bronchoalveolar lavage fluid. The apparatus comprises a suction and aspiration mechanism, and the suction and aspiration mechanism is connected to a collection mechanism by means of a conveyance tube. The collection mechanism comprises a collection bottle, and a first through hole and a second through hole are formed in a bottle cap of the collection bottle. An air guide tube passes through the first through hole, and a liquid guide tube passes through the second through hole. A first valve is arranged on the air guide tube, and a second valve is arranged on the liquid guide tube. Both the air guide tube and the liquid guide tube are connected to the conveyance tube by means of a three-way joint. The present invention uses the described apparatus for collecting mouse bronchoalveolar lavage fluid and use method. The structure is simple. The arrangement of the collection bottle eliminates the need for multiple transfers during lavage fluid collection that lead to loss. Moreover, controlling the opening and closing of the first valve, the second valve, and a third valve enables suction and aspiration in one device, so that the overall operation is convenient, which facilitates lavage fluid collection.

IPC Classes  ?

• A61M 3/02 - EnemataIrrigators

Abstract

The present invention belongs to the technical field of OER electrocatalysts. Provided are a method for constructing a nitrogen-doped bimetallic nanofiber membrane electrocatalyst on the basis of an electrostatic spinning method and the use of the nitrogen-doped bimetallic nanofiber membrane electrocatalyst. The electrocatalyst is prepared from a mixed high-molecular polymer of a metal salt, N,N-dimethylformamide and polyacrylonitrile by means of the coordinated and confined pyrolysis transformation of a one-dimensional porous carbon nanomaterial. The method comprises: S1, preparing a FeCo-NCNF precursor solution; S2, transferring the resulting FeCo-NCNF precursor solution into a plastic injector with a stainless steel needle to perform electrostatic spinning, so as to obtain a nanofiber membrane; and S3, subjecting the obtained nanofiber membrane to high-temperature carbonization and phosphorization in sequence, so as to obtain a nitrogen-doped bimetallic nanofiber membrane electrocatalyst. In the present invention, the nitrogen-doped bimetallic nanofiber membrane electrocatalyst prepared by using the method has the advantages of a large specific surface area, a porous structure, a high nitrogen content, a great number of active sites, etc., and therefore the catalytic performance of the electrocatalyst is improved.

IPC Classes  ?

• C25B 1/04 - Hydrogen or oxygen by electrolysis of water
• C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
• C07D 257/04 - Five-membered rings
• H01M 4/90 - Selection of catalytic material
• D01F 9/22 - Carbon filamentsApparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles

Abstract

Disclosed is a multi-output regression prediction method for small samples in a laser processing process, which relates to the technical field of machine learning, and uses an adaptive dynamic genetic algorithm (ADGA) and an adaptive moment estimation algorithm (AM) to jointly optimize an artificial neural network (ANN), the algorithms being based on enhanced small samples. Data enhancement is achieved by adding noise to output data in the laser processing process, the ADGA is used to search for optimal parameters of the ANN on a global scale, and the AM is used to optimize the gradients of the optimal parameters, thereby accelerating the convergence speed of the model and enhancing the external prediction stability of the model. When the sample size in laser processing is insufficient, stable and accurate small-sample multi-output prediction can be carried out, thereby improving processing efficiency and reducing production costs in laser processing.

IPC Classes  ?

• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming
• G06N 20/00 - Machine learning

Abstract

Disclosed in the present invention are an intelligent ward round making method and system based on SSVEP electroencephalogram signals. The method comprises: acquiring a first electroencephalogram signal of a user under a visual stimulus, and defining reference signals; decomposing the first electroencephalogram signal into sub-band components, calculating the differences between the sub-band components, between the reference signals, and between the sub-band components and the reference signals, acquiring a total spatial filter for each sub-band component, filtering the sub-band components, and rearranging the sub-band components to obtain a second electroencephalogram signal; using variational mode decomposition to acquire a plurality of variational mode components, and optimizing weights under each channel to perform reconstruction so as to obtain a third electroencephalogram signal; and acquiring an evoked stimulus frequency on the basis of intrinsic features of the third electroencephalogram signal, and the reference signals, determining a user intent, and completing intelligent ward round making. The present method enhances effective parts by means of multiple signal decompositions and reconstructions, resulting in a higher signal-to-noise ratio. Moreover, the present method uses average features, thus further ensuring the accuracy of frequency identification; and the present method greatly improves the user's ability to communicate with medical staff.

IPC Classes  ?

• G16H 80/00 - ICT specially adapted for facilitating communication between medical practitioners or patients, e.g. for collaborative diagnosis, therapy or health monitoring
• A61B 5/372 - Analysis of electroencephalograms

Abstract

3), where the M includes one or more selected from the group consisting of Co, Ni, Fe, Mg, Al, and Zn. The composite coating provided by the present disclosure has excellent flame retardancy.

IPC Classes  ?

• C09D 5/18 - Fireproof paints
• C08J 7/04 - Coating
• C08J 7/05 - Forming flame retardant coatings or fire resistant coatings
• C08K 5/00 - Use of organic ingredients
• C08K 5/057 - Metal alcoholates
• C09D 7/63 - Additives non-macromolecular organic
• C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
• C09D 105/08 - ChitinChondroitin sulfateHyaluronic acidDerivatives thereof
• C09D 133/02 - Homopolymers or copolymers of acidsMetal or ammonium salts thereof
• C09D 179/02 - Polyamines
• C09D 197/00 - Coating compositions based on lignin-containing materials

Abstract

Disclosed are a method and system for dyskinesia rehabilitation training based on electroencephalographic signal recognition. The method comprises: acquiring an electroencephalographic signal in training for frequency domain filtering, spatial domain filtering, and standardization; establishing a self-attention convolutional neural network to extract spatial-temporal features, determining, on the basis of prediction and true classification, a first loss function, and determining, on the basis of the spatial-temporal features and a corresponding center distance, a second loss function; adopting a self-distillation model for optimization, and obtaining a third loss function; constructing, on the basis of the first loss function, the second loss function and the third loss function, a model total loss function, and performing iterative training to give an electroencephalographic signal recognition model; and acquiring rehabilitation data, inputting into the model to give an recognition result, and converting into a control command to drive the corresponding limb to complete the rehabilitation training. The method can effectively filter and separate the electroencephalographic signal. The use of the self-attention mechanism and self-distillation training can simplify the model structure as much as possible while ensuring the recognition precision of the model. A more efficient and accurate recognition model can be obtained with the fusion of the multiple loss functions during the network training.

IPC Classes  ?

• A61B 5/369 - Electroencephalography [EEG]
• A61B 5/372 - Analysis of electroencephalograms
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons

Abstract

A non-contact liquid nitrogen refrigeration type high-speed infrared temperature measurement device and method. The non-contact liquid nitrogen refrigeration type high-speed infrared temperature measurement device comprises a work chamber (1); a Dewar flask (2) is installed on one side of the interior of the work chamber (1); an infrared detector (3) is installed on the side wall of the Dewar flask (2); an infrared laser emitter (4) is installed on the other side of the interior of the work chamber (1); a light splitting assembly (5) is installed in the work chamber (1) and positioned right opposite to the infrared laser emitter (4); a reflector (6) is installed in the work chamber (1); a chopper (7) is arranged between the reflector (6) and the infrared detector (3). The Dewar flask (2), the reflector (6), a circuit module (16), the infrared laser emitter (4), the chopper (7), an objective lens (8), the work chamber (1), a beam splitter (56) and other components are integrated into an integrated high-speed infrared temperature measurement device, for solving the problems that existing dynamic temperature measurement methods (a thermocouple method, a heat sensitive membrane method, and a liquid crystal film method) have slow response time, are difficult to adapt to a complex environment, require contact measurement, may change an original temperature field, and have low accuracy of data.

IPC Classes  ?

• G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
• G01J 5/02 - Constructional details
• G01J 5/05 - Means for preventing contamination of the components of the optical systemMeans for preventing obstruction of the radiation path
• G01J 5/061 - Arrangements for eliminating effects of disturbing radiationArrangements for compensating changes in sensitivity by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
• G01J 5/0803 - Arrangements for time-dependent attenuation of radiation signals

Abstract

An animal respiratory dust exposure test apparatus, comprising a constant temperature and humidity test box (1) internally provided with a test chamber. The constant temperature and humidity test box (1) is provided with a dust inlet and a box door (13); a dust conveying device is connected to the dust inlet; a manure leaking separation net (11) is provided in the test chamber; the manure leaking separation net (11) divides the test chamber into an activity area and a cleaning area which are distributed in the vertical direction; an air blowing device and a tray (12) are provided in the cleaning area; and the air blowing device ensures that dust remains suspended all the time, so as to improve the effect of contact between test animals and dust, and improve the test result authenticity. Also disclosed is a test method, comprising the following steps: S1, putting the test animals and the tray (12) into the activity area and the cleaning area; S2, injecting dust, and starting the air blowing device; S3, adjusting the temperature and the humidity; S4, taking out the test animals every day for weighing, observing the feeding and activity condition, and cleaning the tray (12) and the dust; and S5, repeating the steps S1-S4, drawing blood after several days for biochemical marker assay to complete one test period.

IPC Classes  ?

• A01K 1/03 - Housing for domestic or laboratory animals
• A01K 31/00 - Housing birds
• A61D 7/00 - Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals
• B01L 1/00 - EnclosuresChambers
• G09B 23/36 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes for zoology

Abstract

The present disclosure provides a method for predicting a three-dimensional frost heaving deformation of a formation during freezing construction of a metro tunnel and relates to the field of metro tunnel construction. The method includes: firstly determining a freezing construction position, obtaining soil horizon parameters of undisturbed soil within a range of a freezing wall, determining thermophysical and mechanical parameters of soil, layering a soil horizon above the freezing wall according to soil horizon properties thereof and existing buildings (structures), and determining a horizon where a frost heaving influence range exists; subsequently calculating an unsteady temperature field of a single freezing pipe and a radius of a freezing front; then calculating an inner radius and an outer radius of the freezing front after closure of the freezing wall according to a tunnel excavation type, and calculating a frost heaving region; and finally calculating a frost heaving displacement.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06F 113/14 - Pipes
• G06F 119/08 - Thermal analysis or thermal optimisation

Abstract

Disclosed in the present invention are a hydraulic support for solid waste cemented compact backfill mining, and a backfill method. The hydraulic support for backfill mining comprises: a support body portion, a solid backfill aggregate conveying portion, a composite backfill portion and a backfill feedback portion, wherein the composite backfill portion comprises a screw pressing device and a cementing slurry application device, the screw pressing device comprising a sliding base, a screw pressing assembly and a backfill isolation vertical plate, and the cementing slurry application device comprising a cementing slurry conveying line and a backfill area grouting pipe; and the backfill feedback portion comprises an optical fiber stress sensor and a liquid level sensor. By means of the screw pressing device first performing continuous backfill and compressing solid backfill aggregate to improve the degree of backfill compaction of the solid backfill aggregate, and then the cementing slurry application device applying cementing slurry to the backfill body of the solid backfill aggregate which has been primarily compressed and compacted, so as to fill gaps between solid backfill aggregate particles, in order to obtain a stable backfill body with a high degree of compaction, the present invention enables effective control of long-term slow ground deformation while controlling initial deformation of the backfill body.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor

Abstract

Provided are a multi-scale and multi-parameter collaborative testing device and method for true triaxial hydraulic fracturing. The method includes: processing a retrieved rock sample, forming a fracturing port on the top surface of a rock specimen, placing a fracturing pipe in a hole, and connecting the fracturing pipe to a high-pressure water supply pipe; installing and connecting sensors on pressure plates, connecting wires, and turning on testing devices; sealing an airtight chamber, filling oil into the airtight chamber until the airtight chamber is full of oil, and keeping a room temperature constant; turning on a water supply device, starting hydraulic fracturing, and turning on testing modules at the same time; and stopping hydraulic fracturing after complete fracture of the specimen, returning oil to an oil tank, opening the airtight chamber to take out the specimen for observation and photographing, and performing data processing and analysis at the same time.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]

Abstract

The present invention relates to the technical field of array antennas. Disclosed is a low RCS metasurface-based array antenna, comprising a dielectric substrate, and transmission lines, a plurality of first periodic metal units and a plurality of second periodic metal units which are printed on an upper surface of the dielectric substrate, and further comprising a metal floor and a plurality of SMA feed structures which are printed on a lower surface of the dielectric substrate. The first periodic metal units and the second periodic metal units form a metasurface module on the upper surface of the dielectric substrate. Upper ends of the SMA feed structures extend to the upper surface of the dielectric substrate and are connected to the transmission lines. Metal columns are provided in the middle of the first periodic metal units; lower ends of the metal columns are located on the metal floor; and upper ends of the metal columns extend to the upper surface of the dielectric substrate. The low RCS metasurface-based array antenna can achieve good radiation performance and low RCS of broadband.

IPC Classes  ?

• H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices

Abstract

The sealed coring device for an underground coalbed comprises a rib drill pipe assembly, a tail bearing pack, a motor cylinder assembly and a sampling cylinder assembly. The rib drill pipe assembly consists of a rib drill pipe, a tail drill pipe joint and a head drill pipe joint. The tail bearing pack is mounted in the tail drill pipe joint and configured for protecting an internal structure from relatively rotating during drilling of the rib drill pipe, so that the stability of the sampling cylinder is ensured. The motor cylinder assembly is mounted in the rib drill pipe and configured for providing power for action of a center shaft in the sampling cylinder assembly.

IPC Classes  ?

• E21B 25/10 - Formed core retaining or severing means
• G01N 1/08 - Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit

Abstract

A multi-shear end surface damage seepage dynamic test system, comprising a clamping chamber (4), the clamping chamber (4) being used for containing a coal sample (16); shear end surface assemblies (12) are located at both ends of a rubber sleeve (5), the rubber sleeve (5) being located inside the clamping chamber (4); the left end of the clamping chamber (4) is connected to a left pressing cap (3), the left pressing cap (3) being connected to a fixed piston (10), and the fixed piston (10) being provided with a gas inlet hole (2) and an axial pressure liquid injection hole (1); the right end of the clamping chamber (4) is connected to a right pressing cap (7), the right pressing cap (7) being connected to a combined piston (8), and the combined piston (8) being provided with a gas outlet hole (9); and the surface of the clamping chamber (4) is provided with a confining pressure injection hole (6). The test system injects gas into the clamping chamber (4), applies shear stress and presses the chamber respectively by means of the gas inlet hole (2), the axial pressure liquid injection hole (1) and the confining pressure injection hole (6), and, by means of the gas outlet hole (9) arranged at the right end of the clamping chamber (4), monitors the gas flow, thus achieving coal and rock mass stress-fracture-seepage testing at different shear end surfaces and different shear degrees; and the present invention has the advantages of convenient disassembly, practicability and effectiveness.

IPC Classes  ?

• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

A coal body permeation-wetting experiment system based on solution in-situ pressure injection, comprising the following steps: pushing a coal sample (52) into a high-pressure cavity (A), and performing three-directional pressurization by means of the stress loading and control device (B); performing gas adsorption on the coal sample (52) by means of a gas injection device (D); performing heating and temperature control on the coal sample (52) and gas by means of a temperature control device (F); injecting liquid into the coal sample (52) by means of an in-situ pressure injection device (C); monitoring coal body damage, crack initiation, expansion and distribution characteristics by means of an acoustic emission device (E); and recording parameters such as three-directional stress, gas pressure, water injection pressure, temperature and permeability in an experiment process by means of a data acquisition and control device (G).

IPC Classes  ?

• G01N 13/00 - Investigating surface or boundary effects, e.g. wetting powerInvestigating diffusion effectsAnalysing materials by determining surface, boundary, or diffusion effects
• G01N 13/04 - Investigating osmotic effects
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

A true triaxial rock-soil mass test device and a test method therefor, the test device comprising a triaxial loading module, wherein the triaxial loading module comprises a triaxial servo loading system and a triaxial bearing system, the triaxial servo loading system being configured to apply an X-direction pressure, an Y-direction pressure and a Z-direction pressure to the triaxial bearing system; a grouting module, wherein the grouting module is connected to a grouting fracturing pipe (13) in the triaxial bearing system by means of a pipeline; a hydraulic cracking module, wherein the hydraulic cracking module is connected to the grouting fracturing pipe (13) in the triaxial bearing system by means of a pipeline; and a data acquisition and analysis module, wherein the data acquisition and analysis module is connected to an ultrasonic transmitting sensor and an ultrasonic receiving sensor in the triaxial bearing system by means of a line. With the test method using the test device, triaxial grouting tests and triaxial hydraulic cracking tests can be performed, a true triaxial hydraulic cracking and grouting test on a complete rock mass can be performed, and a true triaxial grouting test on a loose mass can also be performed.

IPC Classes  ?

• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 33/24 - Earth materials

Abstract

The present invention relates to the technical field of biomass reducing agents. Disclosed are a preparation method for and the use of a biomass material. The present invention comprises the following steps: 1) preparation of a preliminary carbide; 2) addition of a copper-iron catalyst; 3) low-temperature carbonization; and 4) high-temperature carbonization. The biomass material of the present invention reduces the sulfur content and the ash content and has a high activity and reduction efficiency on the premise of being green and environmentally friendly and a relatively low cost.

IPC Classes  ?

• C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,
• C01B 32/336 - Preparation characterised by gaseous activating agents
• C01B 32/324 - Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
• C01B 32/378 - Purification
• C22B 5/10 - Dry processes by solid carbonaceous reducing agents

Abstract

A gunpowder combustion characteristic testing device, comprising a combustion chamber (1) and a camera mechanism (2), wherein a base (11) is perpendicularly fixed to an inner bottom surface of the combustion chamber (1), a gunpowder placing frame (12) is detachably connected to the base (11), peripheral side walls and a top wall of the combustion chamber (1) have view windows (13) corresponding to the gunpowder placing frame (12), disassembly and assembly portions (14) are provided on outer wall surfaces of two sides of each window (13), and an ignition portion (15) extending to the gunpowder placing frame (12) is connected to the combustion chamber (1); the camera mechanism (2) comprises an outer disassembly frame (21), a distance adjusting assembly (22) and a high-speed camera (23); the outer disassembly frame (21) is detachably connected to the disassembly and assembly portions (14); the distance adjusting assembly (22) is connected to an inner side of the outer disassembly frame (21) and can achieve distance adjustment from the window (13); and the high-speed camera (23) is fixedly mounted on the distance adjusting assembly (22) and has a lens facing the window. The combustion chamber in combination with the camera mechanism forms a detachable combined structure in which a different number of camera mechanisms can be mounted at a different position, thereby overcoming the structural defects of an existing testing device, and achieving a high-precision testing effect.

IPC Classes  ?

• G01N 31/12 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using combustion

Abstract

A downhole optical fiber installation and grouting integrated device, comprising a drill bit (1), a first protection housing (4) and a second protection housing (15), the drill bit being axially provided with a plurality of drill bit grouting holes (2) at intervals, one end of the drill bit being provided with a drill bit fixing snap-fit connector (8) connected to the first protection housing (4), and the end of the drill bit fixing snap-fit connector (8) away from the drill bit being connected to a foldable anchor claw (3). The device does not need drilling holes in advance and can automatically drill holes and install optical fibers, thus increasing the efficiency of optical fiber installation. The length of the device can be prolonged according to actual needs, thus achieving effective installation of optical fibers.

IPC Classes  ?

• E21B 7/00 - Special methods or apparatus for drilling
• G02B 6/50 - Underground or underwater installationInstallation through tubing, conduits or ducts

Abstract

A coal and gangue separation method and device based on a combined use of visible light and X rays. The coal and gangue separation method comprises the following steps: S1, performing first identification; S2, performing image processing; S3, acquiring a target area; S4, performing target identification; S5, performing second identification; S6, extracting gray-scale features; S7, obtaining a mapping set; and S8, sequentially executing steps S1-S4 to remove large gangue, then executing steps S5 and S6 to obtain gray-scale values of subsequent coal gangue, and importing the gray-scale values into the mapping set obtained in step S7, thereby implementing subsequent coal and gangue separation operations.

IPC Classes  ?

• B07C 5/34 - Sorting according to other particular properties
• B07C 5/346 - Sorting according to other particular properties according to radioactive properties
• B07C 5/342 - Sorting according to other particular properties according to optical properties, e.g. colour
• B07C 5/02 - Measures preceding sorting, e.g. arranging articles in a stream, orientating
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 21/47 - Scattering, i.e. diffuse reflection

Abstract

The present invention relates to the field of goods sorting, and provides a goods sorting system. The goods sorting system comprises: a grading device, which grades, according to appearance quality, internal quality and weights of goods to be sorted, said goods; and a sorting device, which sorts said goods according to the grading result. The goods sorting system provided by the present application can improve the grading and sorting efficiency, reduce errors caused by manual determination, ensure the grading and sorting quality, and reduce labor costs, and has the beneficial technical effects such as high degree of intelligence, high detection accuracy, batch inspection, automatic sorting, and reasonable layout.

IPC Classes  ?

• B07C 5/10 - Sorting according to size measured by light-responsive means
• B07C 5/24 - Sorting according to weight using moving weighing mechanisms, e.g. moving along a circular path
• B07C 5/28 - Sorting according to weight using electrical control means

Abstract

The present invention provides a washing, screening and drying integrated modular sampling device for construction aggregates. In light of the problem in current soil tests of low work efficiency due to the needs for manual handling of aggregates and combined use of various machines, an aggregate sampling device is proposed. The sampling device is divided into three areas, which are a screening and washing area, a discharging area, and a drying area, respectively. The screening and washing area comprises a sampling device base, lifting/lowering rods, a water injection pipe, screen fixing rings and conical screens, achieving automatic screening and cleaning of construction aggregates; the conical screens are easy to be replaced and convenient to use. The discharging area comprises a conveyor belt, a pulley, a guide rail, and a length-adjustable material conveying pipe; the position of the guide rail and the height of the length-adjustable material conveying pipe are accurately adjusted by means of the cooperation of the pulley and the guide rail, thereby achieving automatic dumping and independent transportation of aggregates of different particle sizes in the screens. The drying area comprises a drum and a hot air blower, achieving drying and dewatering of the construction aggregates, so that the discharged construction aggregates can be directly used after being cooled. All the areas operate independently and cooperate with each other, so that integration of washing, screening and drying of construction aggregates is achieved, the work efficiency of engineering in-situ tests and laboratory soil tests is well improved, and positive significance is achieved for mix proportion design work of building materials.

IPC Classes  ?

• B07B 1/28 - Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting, or wobbling screens

Abstract

A threaded workpiece surface roughness prediction method in cyclone milling considering the influence of a cutting force, comprising: establishing a workpiece surface scallop height model on the basis of cutter-workpiece contact motion analysis according to the machining characteristics of intermittent multi-blade forming of cyclone milling; establishing a plastic deformation height model on the basis of a friction wear calculation principle and in consideration of the influence of elastic-plastic deformation generated by a cutting force; establishing an elastic recovery height model on the basis of a Hertz elastic contact theory; and establishing a threaded workpiece surface roughness prediction model in cyclone milling on the basis of the scallop height model in combination with the influence of a cutting force on elastic-plastic deformation generated on the surface of a workpiece. Machining parameters can be optimized in advance according to the workpiece surface roughness prediction model, and a cutting force is reduced as much as possible on the basis that certain workpiece surface roughness is obtained, so that the effect of prolonging the service life of a cutter is achieved while the cutting quality is guaranteed.

IPC Classes  ?

• B23C 3/00 - Milling particular workSpecial milling operationsMachines therefor

Abstract

An integrated rapid measurement apparatus for calcium oxide content in limestone ore, which relates to the technical field of measurement of calcium oxide content in limestone ore. The following solution is provided to address the problems of insufficient convenience and speed in existing measurement devices for calcium oxide content in limestone ore, and comprises: a housing (1), a hopper (8) mounted on a top inner wall of the housing (1), a feeding pipe (3) which is mounted at one side of the hopper (8) and is in communication with the exterior of the housing (1), a material receiving plate (6) which is fixed to an inner side of the hopper (8), a material dropping hole (55) which is formed on the material receiving plate (6), a material dropping pipe (10) which is mounted at the bottom of the hopper (8), a scraping assembly which is mounted at an inner side of the hopper (8) and used to scrape material on the surface of the material receiving plate (6) towards the material dropping hole (55), and a human-computer interaction panel (56) which is mounted on the outer wall of the housing (1). The measurement apparatus may test six groups of samples consecutively, effectively improving measurement efficiency. In addition, the measurement apparatus is easy to transfer, and is relatively small in size compared to commonly used experimental apparatuses, occupying a smaller area, and thus meeting the requirements of fieldwork.

IPC Classes  ?

• G01N 23/207 - Diffractometry, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
• G01N 23/20008 - Constructional details of analysers, e.g. characterised by X-ray source, detector or optical systemAccessories thereforPreparing specimens therefor

Abstract

Tandem methods and devices for separating coal and gangue based on visible light and an X-ray are provided. The method comprises: determining, based on a visible light image, an image feature set and a target region of coal gangue; recognizing the coal gangue and removing large gangue in the coal gangue; performing imaging on the coal gangue after the large gangue is removed; extracting a target image and determining a gray scale value of the target image; obtaining samples of coal and gangue of different granularity levels by performing sampling; establishing a database and obtaining a separation threshold of coal and gangue of each granularity level of the current mining area; forming a mapping set and storing the database in a storage space; and obtaining a gray scale value of subsequent coal gangue, importing the gray scale value of the subsequent coal gangue into the mapping set to subsequently separate coal and gangue.

IPC Classes  ?

• B07C 5/342 - Sorting according to other particular properties according to optical properties, e.g. colour
• G01N 21/01 - Arrangements or apparatus for facilitating the optical investigation

Abstract

Provided is a concentration device for coal water slurry, belonging to the technical field of coal water slurry preparation equipment, including a grinding shell, where a grinding mechanism is connected in the grinding shell. A lower part of the grinding shell is connected to a filter unit, where the filter unit is correspondingly arranged with a discharge port of the grinding mechanism. A lower part of the filter unit is correspondingly provided with a pulverized coal particle size distribution mechanism. An outlet end of the pulverized coal particle size distribution mechanism is communicated with a stirrer. The grinding mechanism includes a first bracket, where the first bracket is fixedly connected to inner side walls of the grinding shell. The first bracket is connected with step-by-step grinding units, a first adjusting unit and two second adjusting units.

IPC Classes  ?

• B02C 4/36 - Adjusting, applying pressure to, or controlling the distance between, milling members in mills specially adapted for paste-like materials
• B02C 4/04 - Crushing or disintegrating by roller mills with two or more rollers specially adapted for milling paste-like material, e.g. paint, chocolate, colloids
• B02C 4/42 - Driving mechanismsRoller speed control
• C10L 1/32 - Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions

Abstract

Disclosed is a physical simulation device for testing microbial enhanced coal seam gas desorption efficiency, relating to the technical field of coal seam gas measurement devices. The device comprises a transparent box (1), wherein the transparent box (1) is provided with a first cavity (101) and a second cavity (102); a first pressure gauge (105) and a first portable methane tester (106) are provided at the top of the first cavity (101), and a second pressure gauge (107) and a second portable methane tester (108) are provided at the top of the second cavity (107); two outlets of a gas-intake tee (2) are respectively connected to a first gas intake pipe (3) and a second gas intake pipe (4); a first rotor flowmeter (301) and a first valve (302) are installed on the first gas intake pipe (3), and a second rotor flowmeter (401) and a second valve (402) are installed on the second gas intake pipe (4); a first check valve (501) and a first micro-orifice plate flowmeter (502) are installed on a first exhaust pipe (5) that has a gas intake end extending into the first cavity (101), and a second check valve (601) and a second micro-orifice plate flowmeter (602) are installed on a second exhaust pipe (6) that has a gas intake end extending into the second cavity (102); and an input end of a vacuum pump (7) is connected to output ends of the first exhaust pipe (5) and second exhaust pipe (6). Thus, the residual gas content of a coal seam can be accurately tested.

IPC Classes  ?

• G01N 33/22 - FuelsExplosives

Abstract

Disclosed is a suitability evaluation method for developing underground coal gasification (UCG) engineering by utilizing a deep coal seam, including: acquiring basic geological conditions, engineering geological problems, hydrogeological conditions, contained coal quality, deep coal seam conditions, and heat and syngas components of unit coal gasification in a deep coal seam region to obtain scores of corresponding influencing factors; determining impact indexes of the geological condition and influencing factors; and determining the suitability of developing UCG engineering by utilizing the deep coal seam according to a comprehensive impact index. The suitability of developing UCG engineering by utilizing the deep coal seam is evaluated by a comprehensive analysis method.

IPC Classes  ?

• E21B 43/295 - Gasification of minerals, e.g. for producing mixtures of combustible gases

Abstract

2 detection air pipe and a NO detection air pipe that are mutually connected in parallel, and a NOx photoacoustic detection cavity; and the dust detection air channel includes a dust detection air pipe and a dust photoacoustic detection cavity communicating with the dust detection air pipe.

IPC Classes  ?

• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 1/14 - Suction devices, e.g. pumpsEjector devices
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

Disclosed is an underwater robot for a mine flooding rescue, including a starting unit configured to control the implementation of a whole rescue action; a drive unit connected with the starting unit and configured to provide a robot with power to move; and an execution unit connected with the drive unit and configured to salvage underwater life sources.

IPC Classes  ?

• E21F 11/00 - Rescue devices or other safety devices, e.g. safety chambers or escape ways
• B63C 9/00 - Life-saving in water
• B63G 8/00 - Underwater vessels, e.g. submarines

Abstract

A multi-scale and multi-parameter collaborative testing device and method for true triaxial hydraulic fracturing. The method comprises: processing an acquired rock sample, forming a fracturing opening on the top surface of a rock test piece (2), placing a fracturing pipe (3) in a hole, and connecting the fracturing pipe (3) and a high-pressure water supply pipe (26); arranging and connecting sensors on pressing plates, connecting wires (21), and starting all the testing devices; closing a closeable chamber bin (4), injecting oil into the closeable chamber bin (4) until the oil in the closeable chamber bin (4) is full, and keeping the room temperature constant; starting a water supply device, starting hydraulic fracturing, and starting testing modules; and after the test piece is completely cracked, stopping hydraulic fracturing, returning oil into an oil tank (30), opening the closeable chamber bin (4), taking the test piece out for observation and photographing, and performing data processing and analysis.

IPC Classes  ?

• E21B 47/00 - Survey of boreholes or wells
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures

Abstract

A device and method for fine probing of the formation and expansion of cracks during loading of a rock specimen (5). The device comprises an organic glass framework (1), sensor support frameworks, a multi-parameter dynamic acquisition system, a servo press bearing platform (14), and a computer, wherein the organic glass framework (1) is arranged in the middle of the servo press bearing platform (14); a plurality of sensor support frameworks are arranged on the inside of the organic glass framework (1); the rock specimen (5) is arranged on the inside of the sensor support frameworks; the multi-parameter dynamic acquisition system is fixedly arranged on the sensor support frameworks; the multi-parameter dynamic acquisition system comes into contact with the rock specimen (5); and the multi-parameter dynamic acquisition system and the servo press bearing platform (14) are electrically connected to the computer. By means of the device and method for fine probing of the formation and expansion of cracks during loading of a rock specimen (5), the formation and expansion situation of cracks during loading of the rock specimen (5) is obtained by means of multi-parameter collaborative and dynamic testing, which plays an important role in evaluating the degree of damage evolution, etc. of the rock specimen (5).

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 27/04 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance

Abstract

The present invention relates to the technical field of coal mine tunnel coring, and in particular relates to a novel underground coal seam closed coring device, comprising a rib drill pipe assembly, a tail bearing set, a motor cylinder assembly, and a sampling cylinder assembly. The rib drill pipe assembly is composed of a rib drill pipe, a tail drill pipe connector, and a head drill pipe connector; the tail bearing set is mounted in the tail drill pipe connector and used for protecting an internal structure from relative rotation during drilling of the rib drill pipe, so that the stability of a sampling cylinder is ensured; and the motor cylinder assembly is mounted in the rib drill pipe and used for providing power for action of a center shaft in the sampling cylinder assembly. According to the present invention, long-distance remote monitoring of underground coal bed methane is achieved by means of sensors provided in the sampling cylinder and a transmission line attached to the outer portion of the drill pipe, and the possibility that coal samples leak gas is reduced; and multi-layer sealing and the holding effect of the bearing set on a sampling main body ensure that the pressure of gas in the sampling cylinder is kept in a constant state, so that the sampling result is more accurate.

IPC Classes  ?

• G01N 1/08 - Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit

Abstract

A method for assessing the suitability of carrying out underground coal gasification engineering by using a deep coal seam. The method comprises: acquiring a basic geological condition, an engineering geological issue, a hydrogeological condition, the mass of contained coal, the situation of a deep coal seam, and unit-coal-gasification heat and synthesis gas components of a deep coal seam area, so as to obtain scores for corresponding influence factors; according to the score for each influence factor of the deep coal seam, determining influence indexes of an influence factor of the geological condition and engineering geology, an influence factor of the hydrogeological condition, an influence factor of the mass of the coal, an influence factor of the situation of the coal seam, and an influence factor of the unit-coal-gasification heat and synthesis gas components; and determining a comprehensive influence index on the basis of the influence index of each influence factor of the deep coal seam, and according to the comprehensive influence index, determining the suitability of carrying out underground coal gasification engineering by using the deep coal seam.

IPC Classes  ?

• E21B 43/295 - Gasification of minerals, e.g. for producing mixtures of combustible gases
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling

Abstract

Disclosed in the present invention is an excavation tunnel full-waveform inversion method based on multi-parameter constraint and structure correction. The method comprises the following steps: step 1, constructing a full-waveform inversion initial model, and then performing single-scale inversion on the initial model by using a multi-scale elastic-wave full-waveform inversion method; step 2, performing multi-parameter weighted constraint and structure correction on the single-scale inversion result, so as to obtain a preliminary correction result; step 3, on the basis of a preset limiting condition, performing one-dimensional wave-velocity profile space structure correction and smooth constraint on the preliminary correction result, so as to obtain a secondary correction result; step 4, using the secondary correction result as an initial model of the next scale, and continuing to perform full-waveform inversion; and repeating steps 2-4 until the inversion of all the scales is completed, so as to obtain a full-waveform inversion result. The present invention can effectively solve the problems of the observation system being highly restricted, the detection data volume being relatively small, the offset distance being relatively small, and the multiplicity of solution of waveform inversion being high in terms of advanced detection of an excavation tunnel, thus improving the inversion effect.

IPC Classes  ?

• G01V 1/30 - Analysis

Abstract

th layer of seam; and installing the gas pressure gauge; injecting a high-water and quick-solidifying material into the drill hole; and connecting the gas pressure gauges through optical fibers, and connecting the gas pressure gauges with a ground control system.

IPC Classes  ?

• E21B 47/06 - Measuring temperature or pressure
• C04B 28/00 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

A large-size true triaxial coal-rock mass multi-field seepage coupling system experimental device and method, which relate to the technical field of mining engineering experimental devices. The device comprises a triaxial loading system, a seepage system, a seepage sealing system, a back pressure system, a data acquisition and analysis system, and a triaxial loading chamber (49), wherein the seepage system comprises a liquid-injection seepage system and a gas-injection permeation system; and the triaxial loading chamber (49) comprises a triaxial loading chamber steel frame (54), and a rubber sleeve (28) mounted on the triaxial loading chamber steel frame (54). By using servo control, the device has the advantages of high precision, high controllability, tiny errors, etc. The soft and elastic rubber sleeve (28) is used for edge sealing, and therefore the device has the advantages of having a good sealing effect, being convenient to operate and easy to control, etc. The device also has the advantages of a high degree of freedom, high operability, etc., in terms of the selection of a seepage direction. In terms of seepage media, a seepage experiment can be conducted on both liquid and gas, and thus the device has the advantages of wide usage, broad coverage, etc.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

33), wherein M comprises one or more of Co, Ni, Fe, Mg, Al and Zn. The composite coating provided by the present invention has excellent flame-retardant properties.

IPC Classes  ?

• C08J 9/36 - After-treatment
• C08J 9/40 - Impregnation
• C08J 9/42 - Impregnation with macromolecular compounds
• C08J 7/04 - Coating
• C08L 75/04 - Polyurethanes
• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds
• C08L 79/02 - Polyamines
• C08L 33/02 - Homopolymers or copolymers of acidsMetal or ammonium salts thereof
• C08L 5/08 - ChitinChondroitin sulfateHyaluronic acidDerivatives thereof

Abstract

A water coal slurry concentration device, which belongs to the technical field of water coal slurry preparation apparatuses. The device comprises a grinding housing (1), wherein a grinding mechanism is connected inside the grinding housing (1); a filter unit is connected below the grinding housing (1), and arranged corresponding to a discharge port of the grinding mechanism; a pulverized-coal particle size distribution mechanism is correspondingly arranged below the filter unit, and is configured to separate pulverized coal having different particle sizes; an output end of the pulverized-coal particle size distribution mechanism communicates with a stirrer, which is configured to stir the pulverized coal having different particle sizes into a water coal slurry; and the grinding mechanism comprises a first support (2) which is fixedly connected to an inner side wall of the grinding housing (1), and a step-by-step grinding unit, a first adjustment unit and two second adjustment units are connected to the first support (2), the first adjustment unit being configured to synchronously adjust grinding gaps of the step-by-step grinding unit, and the two second adjustment units being configured to unify the grinding gaps of the step-by-step grinding unit.

IPC Classes  ?

• B02C 4/02 - Crushing or disintegrating by roller mills with two or more rollers
• B02C 4/28 - Crushing or disintegrating by roller mills Details
• B02C 4/32 - Adjusting, applying pressure to, or controlling the distance between, milling members
• B02C 23/20 - Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
• B07B 1/28 - Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting, or wobbling screens
• C10L 1/32 - Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions
• B07B 4/08 - Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
• B07B 7/086 - Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by the winding course of the gas stream
• B02C 4/00 - Crushing or disintegrating by roller mills

Abstract

An active and passive composite turbulent vortex multi-stage enhanced coal slime classification apparatus, comprising a material loosening and layering cylinder, a turbulent vortex detection structure provided on the upper portion of the material loosening and layering cylinder, and an active turbulent vortex classification cylinder section connected to the lower end of the material loosening and layering cylinder. The lower end of the active turbulent vortex classification cylinder section is connected to a passive turbulent vortex classification cylinder, and a passive turbulent vortex classification cone is connected to the lower end of the passive turbulent vortex classification cylinder.

IPC Classes  ?

• B04C 9/00 - Combinations with other devices, e.g. fans

Abstract

Disclosed in the present invention is a multistage washing and screening device for coal treatment in the field of coal treatment. The multistage washing and screening device comprises a bottom plate, wherein the bottom plate is provided with a fixedly connected first mounting plate and a fixedly connected first mounting frame, one end of the bottom plate is provided with a fixedly connected second mounting plate and a fixedly connected third mounting plate, one side of the second mounting plate is provided with a fourth mounting plate, the bottom plate is further provided with a box body, a fixedly connected heavy-media sorter is arranged above the box body, the heavy-media sorter comprises a shell, a sliding fit filter is further arranged in the box body, the filter comprises a filter body, the filter body is provided with a sixteenth opening, and one side of the filter body is provided with a fixedly connected rack. A heavy suspension in the present invention can be directly recycled, the efficiency is high, coal is easily distinguished from gangue-containing coal, and when coal that has been subjected to washing and screening is conveyed, coal that has adhered to a conveying belt can be scraped off by means of a hammering device and a scraping plate on a machine, so that the service life of the machine can be prolonged.

IPC Classes  ?

• B03B 5/40 - Devices therefor, other than using centrifugal force of trough type
• B03B 11/00 - Feed or discharge devices integral with washing or wet-separating equipment

Abstract

The present invention relates to the field of subway tunnel construction. Disclosed is a method for predicting the three-dimensional frost heaving deformation of a stratum caused by freezing-method construction of a subway tunnel. The method comprises: firstly, determining a freezing construction position, obtaining soil layer parameters of undisturbed soil within a freezing wall range, determining thermo-physical and mechanical parameters of a soil body, layering a soil layer above a freezing wall according to soil layer properties and an existing building (structure), and determining a layer where a frost heaving influence range is located; next, calculating an unsteady-state temperature field and the radius of a freezing frontal surface of a single freezing pipe; then, according to a tunnel excavation type, calculating the radius of an inner ring and the radius of an outer ring of the freezing frontal surface after the freezing wall is enclosed, and calculating a frost heaving area; and finally, calculating a frost heaving displacement. In the present invention, thermo-physical and mechanical properties, a freezing time effect, a soil layer icing temperature and a soil layer load factor of a soil body are integrated to determine evolution rules of a freezing curtain and frost heaving deformation in different stages, thereby improving the reliability and accuracy of predicting the three-dimensional frost heaving of a stratum caused by freezing construction.

IPC Classes  ?

• G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
• G06F 119/08 - Thermal analysis or thermal optimisation

Abstract

The present application discloses a broadband solar cell antenna. The antenna sequentially comprises a first solar cell sheet layer, a first dielectric support layer, an antenna layer, a second dielectric support layer, and a second solar cell sheet layer from top to bottom. The first solar cell sheet layer and the second solar cell sheet layer have the same structure, and the first dielectric support layer and the second dielectric support layer have the same structure. An antenna oscillator is a metal-clad copper shovel-shaped structure and uses a horn-shaped ground coplanar waveguide feed line, and an array-like battery sheet forms a super-surface structure. The solar cell antenna of the present application has broadband, miniaturization, and low profile characteristics, the antenna layer is sandwiched between two solar cell sheets, and solar cells are provided on both upper and lower surfaces, so that lighting at different illumination angles can be implemented. The solar cell antenna not only has good antenna radiation performance, but can also collect sunlight, and is also equipped with antenna and solar cell functions.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support

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 - 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 performanceAdaptation 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

Disclosed in the present invention are a rooftop air conditioning system based on solar energy and waste heat recovery, and a use method. The air conditioning system is provided with an enhanced solar air heater, the enhanced solar air heater comprising a transparent glass cover plate, a highly efficient heat absorption plate, a heat preservation plate, an air inlet chamber, an air collection chamber, an angle steel bracket, a fresh air vent, and air outlet, wherein the transparent glass cover plate is arranged towards the south, and a solar air heater back plate is laid with the heat preservation plate. In a summer working condition, fresh air enters a highly efficient plate heat exchanger and, after obtaining the waste heat of exhaust air, is mixed with indoor return air and then cooled by a surface-type air heat exchanger, and thereafter enters a room via an air supply pipe and an air supply vent; the exhaust air enters the highly efficient plate heat exchanger via an air return vent and an air return pipe of an air-conditioned room, and thus the waste heat is transferred to the fresh air and is then discharged to the atmosphere. The system in the present invention has the advantages of energy saving and environment friendliness, a compact structure, low noise, a high automation degree, etc.

IPC Classes  ?

• F24F 5/00 - Air-conditioning systems or apparatus not covered by group or
• F24F 12/00 - Use of energy recovery systems in air conditioning, ventilation or screening
• F24F 11/89 - Arrangement or mounting of control or safety devices

Abstract

An intelligent experimental device for collaborative mining of associated resources includes a signal transmission mechanism, a pressure maintaining mechanism, a feeding mechanism, and a reaction mechanism. The signal transmission mechanism includes a centralized controller, an annunciator, signal receivers, a power supply, a power cord, signal transmitters, and signal sensing valves. The pressure maintaining mechanism includes ambient and axial pressure oil chambers, ambient and axial pressure pumps, ambient and axial pressure liquid distribution tanks, a comprehensive pressure distribution pipe, and hydraulic transmission pipes. The feeding mechanism includes monitoring analyzers, temperature controllers, solution transfer pipes, seepage pumps, mixture conveying pipes, a comprehensive liquid distributor, an aggregate chamber, a liquid chamber, an oil chamber, a gas chamber, a mixing chamber and an analytical purifier. The reaction mechanism includes a uranium mine cavity, a coal seam cavity, an oil-gas cavity, nuclear magnets, thermohydraulic sensors, and shearing gaskets.

IPC Classes  ?

• G01N 35/10 - Devices for transferring samples to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
• G01N 33/24 - Earth materials
• G01N 1/00 - SamplingPreparing specimens for investigation
• G01N 35/00 - Automatic analysis not limited to methods or materials provided for in any single one of groups Handling materials therefor

Abstract

The present invention provides a coal-based solid waste transport and filling integrated machine mining system, comprising a filling hydraulic support (6) and a coal winning machine (7), said filling hydraulic support (6) comprises a hydraulic top plate and a base (601), said hydraulic top plate comprises a hinged front top beam (602) and a rear top beam (603), with a front probe beam (604) attached to front end of said front top beam (602) and a telescopic slide rod (1) connected to rear end of said rear top beam (603), a double transport and single filling non-stop equipment is fixed on the telescopic slide rod (1). The apparatus and method of the present invention weaken the impact of groundwater pollution on mine production and mine ecology, bring good economic and environmental benefits to the mine and promoting safe and green coal mining.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor
• C04B 18/14 - Waste materialsRefuse from metallurgical processes
• C04B 18/24 - Vegetable refuse, e.g. rice husks, maize-ear refuseCellulosic materials, e.g. paper
• C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
• C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone
• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21D 23/03 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyors, mining machines or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
• E21D 23/06 - Special mine caps or special tops of pit-props for permitting step-by-step movement
• E21D 23/16 - Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
• E21F 13/00 - Transport specially adapted to underground conditions
• E21F 15/00 - Methods or devices for placing filling-up materials in underground workings
• E21F 15/06 - Filling-up mechanically

Abstract

A device for testing dynamic load impact on an anchoring body test piece under gradient stress and a test method. The device comprises a gradient stress applying module, a dynamic load applying module, and a stress wave monitoring module; the gradient stress applying module comprises a base (4), a first side beam (61), a second side beam (62), a cross beam (7), supporting rods (11), a bearing steel plate (20), hydraulic jacks (17), oil distributing pipelines (16), and a gradient static load control box (10); the dynamic load applying module comprises a bullet (9), an incident bar (8), and a cushioning device (5), the incident bar (8) is arranged on the outer side of the second side beam (62) and is opposite to a second through hole, and the bullet (9) impacts the incident bar (8) to apply dynamic load to a test piece (15); the cushioning device is arranged on the outer side of the first side beam (61) and is opposite to a first through hole; the stress wave monitoring module comprises sensors (21), a super-dynamic strain gauge (3), an oscilloscope (2), and a computer (1), the sensors (21) are adhered on the test piece (15), a wiring terminal of each sensor (21) is connected to the super-dynamic strain gauge (3), and the super-dynamic strain gauge (3) is sequentially connected to the oscilloscope (2) and the computer (1). The present invention provides an effective test device and method for researching the propagation of stress waves in an anchoring body.

IPC Classes  ?

• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 3/12 - Pressure-testing
• G01N 3/30 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force

Abstract

A test device and method for dynamic load impact on a rock mass under a two-dimensional gradient stress. The test device comprises a gradient stress application module, an axial static load application module, a dynamic load application module, and a stress wave monitoring module, wherein the gradient stress application module comprises a base (18), a first side beam (91), a second side beam (92), a cross beam (7), a support rod (19), a bearing steel plate (17), a hydraulic cylinder (16), an oil distribution pipeline (8) and a gradient static load control box (10); the dynamic load application module comprises a bullet (14) and an incident rod (13), the bullet (14) impacting the incident rod (13) to apply a dynamic load to a test piece (5); and the stress wave monitoring module comprises a sensor (12), an ultra-dynamic strain gauge (3), an oscilloscope (2), and a computer terminal (1), the sensor (12) being adhered to the test piece (5), a wiring terminal of the sensor (12) being connected to the ultra-dynamic strain gauge (3), and the ultra-dynamic strain gauge (3), the oscilloscope (2) and the computer terminal (1) being sequentially connected. The device and method can better simulate the conditions of the dynamic load impact on a single rock mass or combined rock masses in actual stress environment.

IPC Classes  ?

• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 3/12 - Pressure-testing
• G01N 3/313 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force generated by explosives

Abstract

The present invention relates to the field of pharmaceutical excipients, and particularly, to an improved low-toxicity and highly efficient pharmaceutical excipient of an orthoester mixture, a method for preparing same, and a local sustained-release preparation comprising same. The pharmaceutical excipient mainly comprises non-methoxy orthoester compounds (type I and type II) that are mixed in different ratios, or an orthoester compound (type I or type II) and a biocompatible medical macromolecular material that are mixed in different ratios. The type I orthoester compound is represented by chemical formula I, and the type II orthoester compound is represented by chemical formula II. The present invention further provides a method for preparing the pharmaceutical excipient, and a local sustained-release preparation comprising the excipient. The present invention has the beneficial effects of improving the biological safety of the pharmaceutical excipient by adjusting the type and length of substituents of the orthoester compound without changing the properties of the pharmaceutical excipient of the orthoester mixture before and after improvement, including, but not limited to, all of the functions and effects of the pharmaceutical excipient of the orthoester mixture before structural improvement.

IPC Classes  ?

• A61K 9/06 - OintmentsBases therefor
• A61K 45/00 - Medicinal preparations containing active ingredients not provided for in groups
• A61K 47/10 - AlcoholsPhenolsSalts thereof, e.g. glycerolPolyethylene glycols [PEG]PoloxamersPEG/POE alkyl ethers
• A61K 47/22 - Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones
• A61K 47/32 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers
• A61K 47/34 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• C07D 317/34 - Oxygen atoms

Abstract

A device and method for simulating underground pipeline leakage during a shield construction process, the device comprising an experiment case body (3), an observation part is arranged on a side wall of the experiment case body (3), and a loading part is arranged at the top of the experiment case body (3). Two shield simulation parts are arranged inside the experiment case body (3), the two shield simulation parts being parallel to each other and located on the same plane, and a power part being fixedly connected to the shield simulation parts. A pipeline (4) is arranged inside the experiment case body (3), a plurality of leakage holes (18) being formed in the side wall of the pipeline (4). One end of the pipeline (4) communicates with a water supply part, the pipeline (4) being located above the shield simulation part. A monitoring part is arranged around the pipeline (4), the monitoring part being electrically connected to a control system (1). The purposes of accurately simulating underground pipeline leakage, leakage pipeline deformation and stratum settlement condition during a shield construction process can be achieved.

IPC Classes  ?

• G01N 3/06 - Special adaptations of indicating or recording means

Abstract

The present application relates to an attitude self-correcting underground transportation apparatus based on UWB technology and a control method thereof. A transport clamping and fastening mechanism is mounted on an upper platform part of a six-degree-of-freedom motion platform. An attitude perception and sensing set at least includes three UWB tags being configured to acquire position information. A control module is electrically connected to the attitude perception and sensing set, the six-degree-of-freedom motion platform, and the transport clamping and fastening mechanism separately, and is configured to send an electric signal to drive the six-degree-of-freedom motion platform and the transport clamping and fastening mechanism to grip an object to be transported, collect positioning information of the attitude perception and sensing set, calculate the attitude of the six-degree-of-freedom motion platform in real time, and perform attitude adjustment with reference to an expected position and attitude to maintain a smooth transportation process.

IPC Classes  ?

• B60P 7/06 - Securing of load
• E21F 13/00 - Transport specially adapted to underground conditions

Abstract

An overlying strata damage partition and height determination method based on a permeability-damage relationship, relating to the technical field of overlying rock damage partition and height prediction of mine stopes, and comprising the following steps: step 1: rock stratum distribution and ground stress environment investigation; step 2: specimen preparation; step 3: performing a triaxial compression-seepage test on rocks of different rock strata; step 4: establishing a damage-permeability relationship; step 5: overlying strata damage region division based on the damage-permeability relationship; step 6: damage constitutive relationship construction; step 7: the damage constitutive relationship is embedded into FLAC3D software; step 8: establishing a numerical model; and step 9: performing numerical simulation to determines the height of each damage region. In the method, after a working face is mined, damage region division and height determination may be performed on the working face roof.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

A rock creep model viscoelasticity parameter acquisition method based on a deformation modulus, which comprises the following steps: performing a triaxial compression test under different confining pressures to obtain the strength and the deformation modulus of a rock under different confining pressures; performing a creep test on the rock under different confining pressures by using a graded loading approach; and obtaining, according to a given confining pressure and an established confining pressure-deformation modulus relationship and confining pressure-long-term strength relationship, a deformation modulus and long-term strength under the confining pressure value, and then obtaining, in conjunction with the relationship between the viscoelasticity parameter of an established Burgers creep model and the deformation modulus, a viscoelasticity parameter and a creep-time curve of the model. The method only requires rock creep test data under a small number of confining pressures to establish a parameter-deformation modulus relationship of the creep model can be established, and only requires the deformation modulus of the rock under a certain confining pressure to obtain the creep model parameters under the confining pressure and long-term strength and a test curve reflecting the full accelerating creep process of a material, thereby providing a way to study the creep rupture behavior of the material.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Abstract

A gas pressure maintaining split Hopkinson pressure bar confining pressure device, which comprises a metal outer casing (1); a cavity (11) is formed in the metal outer casing (1), and a through hole (12) passing through the metal outer casing (1) is formed on each of two sides thereof; a rubber sleeve (2) is arranged in the metal outer casing (1) and is used for placing a to-be-tested coal sample (3); the Hopkinson pressure bar (4) comprises an incident bar (41) and a transmitted bar (42) which each pass through a through hole (12) at a respective side as well as through the rubber sleeve (2), and said bars are used for abutting against two sides of the to-be-tested coal sample (3). By means of providing a confining pressure assembly (5) and injecting hydraulic fluid into the cavity (11), same can act on the rubber sleeve (2) to produce a confining pressure effect on the coal sample (3); the fluid pressure is isolated from the air pressure by means of an arranged metal pipe (61), a filled gas enters into the rubber sleeve (2) and can be gradually adsorbed by the coal sample (3), and a stable pressure maintaining effect can be achieved, thereby facilitating conducting experiments.

IPC Classes  ?

• G01N 3/30 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 1/28 - Preparing specimens for investigation

Abstract

A hydraulic coupling experiment device and method having a CT real-time scanning function. The hydraulic coupling experiment device having the CT real-time scanning function comprises a CT scanning chamber (1), and further comprises a supporting frame (2), a hydraulic coupling mechanism (3), and a jack (4) which are provided in the CT scanning chamber (1). The supporting frame (2) comprises a base (201), a top plate (202), a plurality of stand columns (203) enabling the top plate (202) and the base (201) to be provided at intervals, and a movable plate (204) provided between the top plate (202) and the base (201) and capable of sliding on the plurality of stand columns (203). The hydraulic coupling mechanism (3) comprises an experimental box (301), a pressure box (302) provided in the experimental box (301), and a pressing column (303) slidably provided on the top of the experimental box (301) in a penetrating manner, the experimental box (301) is provided on the movable plate (204), and the jack (4) is provided on the base (201). The problems that in an experiment of researching the impact of water on the mechanical property of coal and rock mass, the mechanical property of the water-immersed coal and rock mass cannot be truly reproduced, and the microscopic mechanical damage characteristics in the coal and rock mass cannot be observed in real time are solved.

IPC Classes  ?

• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]

Abstract

222322, the content thereof is tested by means of differential detection, and then the content of NO is deduced, such that the problem of NO being difficult to detect in an ultraviolet band is solved.

IPC Classes  ?

• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 15/00 - Investigating characteristics of particlesInvestigating permeability, pore-volume or surface-area of porous materials

Abstract

An intrinsically safe and explosion-proof photoacoustic spectroscopy dust measurement device, comprising an optical measurement dustproof chamber (2) and a power supply explosion-proof chamber (1) mounted on the optical measurement dustproof chamber (2); a first conversion circuit, a second conversion circuit and a third conversion circuit which are distributed independently from each other being arranged in the power supply explosion-proof chamber (1); an optical measurement plate (18) being mounted in the optical measurement dustproof chamber (2); and a resonant cavity (20) being mounted on the optical measurement plate (18). The three conversion circuits are used to respectively adapt to ground, underground and battery-electric locomotive working environments having three different voltages, thus achieving various measurement ways and a wider application range; for underground dusty gas, the optical measurement dustproof box (2) is simple to use and convenient to operate, and shows more rapid and precise measurement effects; and the power supply explosion-proof box (1) can prevent the risk of explosions caused by electric sparks generated due to sudden changes of output current, thereby ensuring safety and stability of a measurement environment and accuracy and reliability of measurement data.

IPC Classes  ?

• G01N 15/00 - Investigating characteristics of particlesInvestigating permeability, pore-volume or surface-area of porous materials
• H02M 5/00 - 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

Abstract

22 in dust, the concentration of respirable dust and the total dust concentration cannot be measured online in real time during mine dust detection is facilitated.

IPC Classes  ?

• G01N 15/06 - Investigating concentration of particle suspensions

Abstract

2 content.

IPC Classes  ?

• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
• G01N 1/22 - Devices for withdrawing samples in the gaseous state
• G01N 1/24 - Suction devices
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

2222222 in coal dust not being able to be detected on line in real time, have high precision and low cost, and lay a foundation for real-time monitoring of the concentration of respirable dust in a coal mine.

IPC Classes  ?

• G01N 15/06 - Investigating concentration of particle suspensions
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

An underwater robot for mine water seepage rescue, comprising: a starting unit (100), used for controlling the development of the entire rescue action; a transmission unit (200), connected to the starting unit (100), and used for providing the moving power for the robot; and an execution unit (300), connected to the transmission unit (200), and used for salvaging an underwater life source. A propeller (203) of the underwater robot is controlled by a single-chip microcomputer (106) to be braked; when the propeller (203) is started, the robot ascends, descends, advances, and retreats at multiple degrees of freedom; when being rotated reversely by means of a torque motor (3055), a manipulator mechanism (305) is promoted by means of a coupling (302) to act; the position of a person in a mine in an accident under the condition of mine water seepage can be determined by means of visual recognition of the manipulator mechanism (305); and the robot can flexibly adapt to an emergency under the condition of water seepage, so as to facilitate the dragging of the underwater life source and some sundries to the ground by the robot, and a series of problems.

IPC Classes  ?

• B63C 9/00 - Life-saving in water
• B25J 15/02 - Gripping heads servo-actuated
• B63C 11/52 - Tools specially adapted for working underwater, not otherwise provided for
• B25J 11/00 - Manipulators not otherwise provided for
• B25J 15/00 - Gripping heads

Abstract

The present invention provides a method for simultaneously measuring gas pressures of a close distance coal seam group, comprising the following steps: (1) constructing a downward inclined pressure measuring borehole; (2) lowering a first coal seam pressure measuring pipe, and lowering a baffle and a polyurethane plugging material when a pipe head reaches the lowest coal seam; and after the plugging material is solidified, installing a gas pressure gauge; (3) lowering a second coal seam pressure measuring pipe, and lowering a baffle and a polyurethane plugging material when a pipe head reaches the second coal seam; and after the plugging material is solidified, installing a gas pressure gauge; (4) lowering an n-th coal seam pressure measuring pipe, and lowering a baffle and a polyurethane plugging material when a pipe head reaches the n-th coal seam; and after the plugging material is solidified, installing a gas pressure gauge; (5) injecting a high-water quick-setting material into the borehole; and (6) connecting the gas pressure gauges by means of optical fibers, and connecting the gas pressure gauges to a ground control system. According to the present invention, by constructing only one pressure measuring borehole, pressures of two or more adjacent coal seams of a coal seam group can be simultaneously tested, and therefore, the present invention has the advantages of cost saving and accurate testing.

IPC Classes  ?

• E21B 47/06 - Measuring temperature or pressure
• E21B 33/13 - Methods or devices for cementing, for plugging holes, crevices or the like

Abstract

The present invention relates to a method and system for determining a rational width of a gob-side working face under a thick and hard key stratum condition. The method comprises: constructing a piecewise function by taking the width of a gob-side working face as an independent variable, wherein the piecewise function represents a relationship between the width and parameters of the gob-side working face, and the parameters comprise the width of a small coal pillar of a gob-side entry, the width of the entry, the width of a fracture zone, the width of a plastic zone, the uniaxial compressive strength of a coal body, the buried depth of a coal seam, a breaking angle, the average capacity of an overlying rock stratum of a gob, and the width of the gob; acquiring the parameters of the gob-side working face of which the width is to be determined; determining a solution set according to the parameters of the gob-side working face, of which the width is to be determined, the piecewise function and a set function threshold value; and determining, as a rational width, a numerical value that conforms to the solution set, and performing mining on the gob-side working face according to the rational width. By means of the present invention, mining can be performed on a gob-side working face according to a rational width, the burst danger level and area of the working face can be actively reduced, the anti-burst engineering amount is reduced, and rock burst can be effectively prevented and controlled.

IPC Classes  ?

• E21C 41/16 - Methods of underground miningLayouts therefor

Abstract

Disclosed in the present invention is a method for predicting threaded-workpiece surface topography during whirlwind milling. In the method, the surface topography characteristics of a workpiece are analyzed by using a multi-cutting-edge intermittent forming process characteristic of dry thread milling. According to a surface topography forming mechanism of a threaded workpiece, a thread raceway surface residual height prediction model and a thread raceway surface waviness prediction model are built, and the effects on thread raceway surface topography of parameters such as cutting parameters, an undeformed chip thickness, the minor and major diameters and the helix angle of a thread, the number of cutting tools, the geometric dimensions of the cutting tool, and a workpiece-to-cutting-tool eccentric distance are taken into consideration. By means of a workpiece surface topography prediction model, machining parameters can be optimized in advance, so as to obtain the optimal machining solution, thereby improving the machining quality of whirlwind milling.

IPC Classes  ?

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

Abstract

A coal-based solid waste transporting and filling integrated machine mining system, comprising a filling hydraulic support (6) and a coal mining machine (7). The filling hydraulic support (6) comprises a hydraulic top plate and a base (601). The hydraulic top plate comprises a front top beam (602) and a rear top beam (603) hingedly connected to each other. A front probe beam (604) is connected to the front end of the front top beam (602), the rear end of the rear top beam (603) is connected to a telescopic sliding rod (1), and a double-operational single-charging non-stop device is fixed on the telescopic sliding rod (1). The method for filling by using the system weakens the influence of underground water pollution on mine production and ecological environment of a mining area, brings good economic benefits and environmental benefits to the mining area, and promotes safe and green mining of coal.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor
• E21D 23/06 - Special mine caps or special tops of pit-props for permitting step-by-step movement
• E21D 23/03 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyors, mining machines or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
• E21D 23/16 - Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21F 15/06 - Filling-up mechanically
• E21F 13/00 - Transport specially adapted to underground conditions
• C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements

Abstract

A method and system for extracting a net signal in a near-infrared spectrum, relating to the technical field of near-infrared spectrums. The method for extracting a net signal comprises the following steps: collecting a sample, and acquiring original near-infrared spectral data of the sample; measuring the content of an analyte of interest by using a chemical measurement method, and using the content as a response variable; and applying different spectral preprocessing methods and a combination of the different spectral preprocessing methods to the original spectral data, finding an optimal preprocessing solution by using 10-fold cross-validation; and selecting a band related to the response variable by using a LASSO algorithm. By extracting a net analyte signal in a near-infrared spectrum to reduce the number of principal components in an optimal partial least squares model, the accuracy and robustness of the model are improved while the complexity of the model is reduced; and the introduction of a preprocessing solution changes directions of near-infrared spectral disturbances, so that projections of spectral disturbances in a net signal direction are reduced.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• 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

Abstract

Disclosed are a hydro-mechanical coupling experimental device with CT real-time scanning and a use method thereof. The hydro-mechanical coupling experimental device with the CT real-time scanning includes a CT scanning room and further includes a support frame, a hydro-mechanical coupling mechanism and a jack that are arranged in the CT scanning room. The support frame includes a base, a top plate, a plurality of columns for arranging the top plate and the base at intervals, and a movable plate that is arranged between the top plate and the base and can slide on the plurality of columns. The hydro-mechanical coupling mechanism includes an experimental box, a pressure box arranged inside the experimental box and a compression leg slidingly worn on a top of the experimental box; and the experimental box is arranged on the movable plate, and the jack is arranged on the base.

IPC Classes  ?

• G01N 23/00 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or
• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
• G01N 1/28 - Preparing specimens for investigation

Abstract

A protection device for a telescopic cold cutting machine for a coal mine, and a method of use. The protection device comprises a handheld device and a protection support (1), wherein the protection support (1) is internally provided with a pressure sensor (2) and an infrared sensor (4); and the protection support (1) is mounted in front of a spray head (7) of a cold cutting machine. The protection device further comprises a first single-chip microcomputer (20), a second single-chip microcomputer (30) and a main controller (40), wherein an input interface of the first single-chip microcomputer (20) is connected to the pressure sensor (2), and an output interface of the first single-chip microcomputer (20) is connected to the main controller (40); and an input interface of the second single-chip microcomputer (30) is connected to the infrared sensor (4), and an output interface of the second single-chip microcomputer (30) is connected to the main controller (40). Firstly, the application range can be expanded by extending and shortening a handheld telescopic rod (6); secondly, a position in front of the spray head (7) is effectively protected by means of a top plate (12), so that casualties can be avoided; and finally, the infrared sensor (4) and the pressure sensor (2) are combined to achieve the automatic stopping of cutting, thereby achieving dual protection of a cold cutting device.

IPC Classes  ?

• B24C 7/00 - Equipment for feeding abrasive materialControlling the flowability, constitution, or other physical characteristics of abrasive blasts
• B24C 9/00 - Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
• B24C 5/04 - Nozzles therefor
• B24C 1/04 - Methods for use of abrasive blasting for producing particular effectsUse of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
• B24C 3/06 - Abrasive blasting machines or devicesPlants characterised by the arrangement of the component assemblies with respect to each other movableAbrasive blasting machines or devicesPlants characterised by the arrangement of the component assemblies with respect to each other portable

Abstract

The present invention discloses a multi-energy complementary system for a co-associated abandoned mine and a use method. The multi-energy complementary system for a co-associated abandoned mine includes a mining mechanism, a grouting mechanism and an energy mechanism. In the present invention, the mining of coal and uranium resources is realized through the mining mechanism, the subsidence and seepage reduction of the stratum is realized through the grouting mechanism, and the effective utilization of waste resources is realized through the energy mechanism. Finally, with the efficient cooperation of the three mechanisms, safe and efficient development and utilization of co-associated resources in the full life cycle are realized, and the purposes of green and efficient mining of coal and uranium resources and secondary development of a coal seam goaf are achieved, thereby facilitating the realization of dual-carbon goals and the development of low-carbon green energy.

IPC Classes  ?

• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21F 15/08 - Filling-up hydraulically or pneumatically
• E21B 41/00 - Equipment or details not covered by groups
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
• E21B 43/29 - Obtaining a slurry of minerals, e.g. by using nozzles
• E21C 41/22 - Methods of underground miningLayouts therefor for ores, e.g. mining placers
• H02J 15/00 - Systems for storing electric energy

Abstract

A spectral peak automatic detection and reconstruction method and system in tea near-infrared spectral analysis. The method comprises: first acquiring original spectral data; then initializing a parameter; then calculating the position and width of an absorption peak; then updating a related coefficient and screening a sparse block; then calculating a cost function and a desire; then determining a termination condition; and finally outputting reconstructed data. The use of a block sparse Bayesian learning method for automatically detecting the positions of spectral peaks and determining peak widths can accurately determine the number and positions of spectral peaks of a near-infrared spectrum, thereby accurately reconstructing and selecting spectral peak features, and avoiding the problems of false reconstruction and loss during an algorithm reconstruction process; moreover, a policy based on sparse reconstruction and automatic spectral peak detection can implement the selection of absorption peak features of near-infrared spectral data of multiple overlapping peaks, thereby implementing high-precision automatic detection and reconstruction of an absorption peak in green tea near-infrared spectral data, and facilitating the increase in tea detection grade precision and the expansion of market trading.

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
• G01N 21/3563 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solidsPreparation of samples therefor

Abstract

An orthoester mixture pharmaceutical excipient, relating to the field of pharmaceutical excipients, and mainly obtained by mixing different orthoester compounds in different proportions or by mixing orthoester compounds with biocompatible medical polymer materials in different proportions. Also disclosed are a preparation method for the pharmaceutical excipient, and a topical sustained-release drug delivery preparation containing the excipient. The beneficial effects are that: the fluidity of the orthoester mixture pharmaceutical excipient can be adjusted; the degradation rate can be controlled, and the drug release rate can be adjusted; the orthoester mixture pharmaceutical excipient can be used as a good solvent, and can dissolve small molecule and protein drugs; topical injections, creams and ointments can be prepared; good biocompatibility is achieved, metabolism is clear, and clinical translation and use are facilitated.

IPC Classes  ?

• A61K 9/06 - OintmentsBases therefor
• A61K 45/00 - Medicinal preparations containing active ingredients not provided for in groups
• A61K 47/10 - AlcoholsPhenolsSalts thereof, e.g. glycerolPolyethylene glycols [PEG]PoloxamersPEG/POE alkyl ethers
• A61K 47/22 - Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones
• A61K 47/34 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• C07D 317/34 - Oxygen atoms

Abstract

Disclosed are a mine dust real-time detection system based on double-photoacoustic spectrometry and a detection method. The mine dust real-time detection system based on double-photoacoustic spectrometry includes a first sampling unit, a first photoacoustic detection cavity, a second sampling unit, a second photoacoustic detection cavity, a signal unit and a processing unit; the first sampling unit is used for sampling in respective, the first photoacoustic detection cavity provides a photoacoustic effect field to substances sampled by the first sampling unit, the second sampling unit is used for sampling in respective, the second photoacoustic detection cavity provides the photoacoustic effect field to substances sampled by the second sampling unit, the signal unit is used for providing a laser signal, and the processing unit is used for collecting and processing a photoacoustic signal.

IPC Classes  ?

• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 1/24 - Suction devices
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

A sample preparation device for a high-ice-content frozen soil blasting model. The sample preparation device is located on a fixed support (1), the fixed support (1) is provided with a first electric motor (2) and a second electric motor (3), a circular arc-shaped sliding rail (4) is mounted in the center of the fixed support (1), and the first electric motor (2) and the second electric motor (3) are connected to the sample preparation device by means of a rotating shaft (5). The sample preparation device is provided with a sealing cover (7), a sample bin (8), a sample rotator (9) and a sample fixing cylinder (10); a first sliding wheel (11), a second sliding wheel (12) and a third sliding wheel (13) are erected outside the sample preparation device, and all freely slide in the circular arc-shaped sliding rail (4); the sample bin (8) is loaded in the center of the sample preparation device; and the sealing cover (7) is fixed at an upper end of the sample preparation device, and is integrated with a refrigeration blower (75) and a blast hole preset mold (77). According to the sample preparation device, moisture migration caused by gravity can be counteracted by means of two-degree-of-freedom rotation, and the sample preparation qualification rate is improved by presetting the position of a blast hole.

IPC Classes  ?

• G01N 1/42 - Low-temperature sample treatment, e.g. cryofixation

Abstract

A capacitive flexible tactile sensor based on a graded inclined micro-cylindrical structure, the sensor comprising an upper electrode layer (1), a lower electrode layer (2), and a dielectric layer located between the upper electrode layer (1) and the lower electrode layer (2), wherein the dielectric layer is composed of an upper dielectric layer (31) and a lower dielectric layer (32); the upper dielectric layer (31) comprises an upper dielectric layer substrate (311), an upper dielectric layer long micro-cylinder (312), and an upper dielectric layer short micro-cylinder (313); the lower dielectric layer (32) comprises a lower dielectric layer substrate (321), a lower dielectric layer long micro-cylinder (322), and a lower dielectric layer short micro-cylinder (323); the upper dielectric layer long micro-cylinder (312) and the lower dielectric layer long micro-cylinder (322) are tightly bonded; and there is a distance between the upper dielectric layer short micro-cylinder (313) and the lower dielectric layer short micro-cylinder (323). The sensor has a stable structure, a viscous effect is overcome, and the dielectric layer is easier to bend and deform, so that the sensor has higher sensitivity, a shorter response/recovery time, lower hysteresis, and better stability.

IPC Classes  ?

• G01L 1/14 - Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
• G01L 1/00 - Measuring force or stress, in general
• G01L 9/12 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance

Abstract

The present invention relates to the technical field of coal mine safety, and relates to a deep recurrent neural network-based coal and gas outburst accident prediction and recognition method. The present invention provides a deep recurrent neural network-based coal and gas outburst accident prediction and recognition method. Data features and inherent correlations thereof are zoomed in while the data dimension is reduced; by using a deep recurrent neural network training method, the inherent features of data can be effectively learned, and a large amount of model training proves that the method is quite robust; a method of combining multiple model evaluation indicators is used, so that a selected model is more representative.

IPC Classes  ?

• G06K 9/62 - Methods or arrangements for recognition using electronic means
• G06N 3/04 - Architecture, e.g. interconnection topology
• G08B 21/16 - Combustible gas alarms

Abstract

A co-associated abandoned mine multi-energy complementary system and an application method. The co-associated abandoned mine multi-energy complementary system comprises: a mining mechanism, a grouting mechanism, and an energization mechanism. Coal and uranium resource mining is achieved by means of the mining mechanism, formation anti-settlement seepage is achieved by means of the grouting mechanism, and waste resources are effectively utilized by means of the energization mechanism; finally, the safe and efficient development and utilization of a co-associated resource full life cycle is achieved under the efficient cooperation of the three mechanisms, and the goals of the environmentally-friendly, safe, and efficient mining of coal and uranium resources and the secondary development of a goaf (6) of a coal seam (5) are achieved, thereby facilitating the implementation of a dual-carbon target and low-carbon green energy development.

IPC Classes  ?

• E21C 41/16 - Methods of underground miningLayouts therefor
• E21F 15/00 - Methods or devices for placing filling-up materials in underground workings
• E21F 17/16 - Modification of mine passages or chambers for storage purposes, especially for liquids or gases
• H02J 15/00 - Systems for storing electric energy
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Disclosed are a co-associated abandoned mine multi-energy complementary system and an application method therefor. The co-associated abandoned mine multi-energy complementary system comprises a mining mechanism, a grouting mechanism and an energization mechanism. The system realizes coal and uranium resource mining by means of a mining mechanism, realizes stratum settlement and seepage reduction by means of a grouting mechanism, realizes the effective utilization of waste resources by means of an energization mechanism, and finally realizes, under the efficient cooperation of the three mechanisms, full-lifecycle safe and efficient development and utilization of co-associated resources, thereby achieving the goals of green and efficient mining of coal and uranium resources and secondary development of a coal seam goaf.

IPC Classes  ?

• E21C 41/16 - Methods of underground miningLayouts therefor
• E21F 15/00 - Methods or devices for placing filling-up materials in underground workings
• E21F 17/16 - Modification of mine passages or chambers for storage purposes, especially for liquids or gases

Abstract

Disclosed in the present invention are a carbon fiber and graphene compounded high-strength porous material, and a gas diffusion layer and a preparation method therefor. The carbon material integrates respective structures and characteristic advantages of a carbon fiber and graphene, complements each other, and has characteristics such as high mechanical strength (the carbon fiber is not cut off), hierarchical pore gradient distribution, good air permeability, good electrical conductivity, good thermal conductivity, light weight, and high stability. The preparation method comprises process steps such as graphene preparation, filament division of a carbon fiber bundle by spreading a liquid film, adsorption and anchoring of a filament by means of graphene, graphene coating, and high-temperature treatment. In the preparation process of the carbon-based gas diffusion layer, the carbon fiber is not cut off, the strength of the carbon fiber is kept, and the carbon-based gas diffusion layer is suitable for roll-to-roll batch preparation and is suitable for fields such as fuel cells, metal-air batteries, and electrolyzed water.

IPC Classes  ?

• H01M 4/96 - Carbon-based electrodes

Abstract

A coal gangue comprehensive utilization system for an associated-resource mining area, and an application method for the system. The coal gangue comprehensive utilization system for an associated-resource mining area comprises an occurrence mechanism, an operation mechanism, a treatment mechanism and an execution mechanism. The occurrence mechanism is provided with an unconsolidated formation, a uranium reservoir, a working face layer and an oil and gas reservoir. The operation mechanism is provided with a comprehensive storeroom, an acid leaching agent preparation tank, an adhesive tank, a uranium tank, an oil and gas pipe, an oil exploitation machine, an oil and gas cluster well, a gas extraction well, a gas extraction pump, a gas delivery pipe, a supplement well, a gas transport pipe, a uranium transport pipe, an in-situ leaching pipe, a uranium extraction pump, a uranium extraction well and an in-situ leaching well. The treatment mechanism is provided with a coal gangue sorting machine, a coal mining body, a coal gangue mixture, a coal gangue gasification furnace, a conveyor belt II, a conveyor belt III, a gas displacement pipe, a gas displacement pump, a gas displacement well and a gob-side entry. The execution mechanism is provided with a gangue crushing and grouting machine, a goaf, a conveyor belt I, a conveyor belt IV, a grouting pipe and a support body. By means of the close cooperation of the four mechanisms, the green and efficient utilization of coal gangue in an associated-resource mining area is realized.

IPC Classes  ?

• E21F 17/16 - Modification of mine passages or chambers for storage purposes, especially for liquids or gases
• E21F 13/00 - Transport specially adapted to underground conditions
• E21F 7/00 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose

Abstract

Disclosed are a comprehensive utilization system for water and gas in a co-associated resource mining area and an application method. The comprehensive utilization system for water and gas in a co-associated resource mining area comprises a geological mechanism, an operation mechanism, a development mechanism, a repair mechanism, and a conversion mechanism; the geological mechanism is provided with a surface layer (1), a uranium reservoir (2), a coal reservoir (3), and an oil and gas reservoir (4); the operation mechanism is provided with an oil and gas tank (6), a water storage lake (5), a uranium liquid collection tank (27), a leaching liquid preparation tank (32), a liquid suction pump (28), a liquid injection pump (33), a liquid suction well (30), a liquid injection well (29), a liquid injection pipe (31), a water suction pump (10), a water suction well (8), a water conveying pipeline (9), an oil extraction machine (14), an oil and gas cluster well (13), and an oil and gas pipeline (20); the development mechanism is provided with a coal mining filling body (7), a gob-side roadway (19), a filling pipe (35), a concrete body (18), and a communication valve (22); the repair mechanism is provided with a water purification pool (15), a purifier (17), a water storage pool (16), a water injection pump (11), and a water injection well (12); and the conversion mechanism is provided with a gas collection chamber (21), a tail gas chamber (26), a combustion chamber (24), a filling pier (25), a gas conveying pipe (34), and a heat conduction pipe (23). According to the system, full-life-cycle energization and functionalization efficient development and utilization of the co-associated resource mining area are achieved by means of cooperation of the five mechanisms.

IPC Classes  ?

• E21F 17/16 - Modification of mine passages or chambers for storage purposes, especially for liquids or gases
• E21F 13/00 - Transport specially adapted to underground conditions
• E21F 7/00 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose

Abstract

A multifunctional auxiliary nursing robot, comprising a moving platform (1), a rotating device (2), an ascend and descend device (3), a supporting beam assembly (4), parallel working arms (5), a transverse moving driving device (6), a posture adjustment driving device (7), and a measurement and control system (8). By means of a matching operation of a series adjustment mechanism and the parallel working arms (5), a mechanical body can achieve rotation, ascending and descending, and horizontal transverse movement around a vertical axis, and achieve five degrees of movement freedom of rotation around two horizontal axes, such that auxiliary nursing functions of getting up, transferring, defecating, cleaning, posture adjusting, and assisting exercise rehabilitation can be achieved. The human body posture can be comfortably adjusted by configuring a hanging belt or a hanging net. The operation space can be enlarged by means of the moving platform (1), such that flexibility is improved, and movement with six degrees of freedom including three translation degrees and three rotation degrees can be achieved at most. The working intensity of nursing personnel can be reduced, and the activity range of the user can be expanded, such that living quality can be improved; and the system has the advantages of compact structure, multiple degrees of movement freedom, small occupied space, simple operation and maintenance, low cost, etc.

IPC Classes  ?

• B25J 11/00 - Manipulators not otherwise provided for

Abstract

Disclosed is an intelligent experimental apparatus for the cooperative mining of co-associated resources. The intelligent experimental apparatus for the cooperative mining of co-associated resources comprises a signal transmission mechanism, a pressure maintaining mechanism, a feeding mechanism and a reaction mechanism. The signal transmission mechanism is provided with a centralized controller, an annunciator, a signal receiver, a power supply, a power cord, a signal transmitter, and a signal sensing valve. The pressure maintaining mechanism is provided with a confining pressure oil cavity, an axial pressure oil cavity, a confining pressure pump, an axial pressure pump, a confining pressure liquid distribution tank, an axial pressure liquid distribution tank, an integrated pressure distribution pipe, and a hydraulic transmission pipe. The feeding mechanism is provided with a monitoring analyzer, a temperature controller, a solution conveying pipe, a seepage pump, a mixing transport pipe, a comprehensive liquid separator, an aggregate cavity, a liquid cavity, an oil cavity, an air cavity, a mixing cavity, and an analysis purifier. The reaction mechanism is provided with a uranium ore cavity, a coal seam cavity, an oil and gas cavity, a nuclear magnet, a temperature and hydraulic pressure sensor, and a shearing gasket. The four major mechanisms cooperate closely to achieve the intelligent in-situ simulation of mining of co-associated resources, and monitor and analyze the coupling evolution features of multiple fields.

IPC Classes  ?

• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21C 41/22 - Methods of underground miningLayouts therefor for ores, e.g. mining placers
• E21C 41/24 - Methods of underground miningLayouts therefor for oil-bearing deposits
• E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere
• E21F 17/18 - Special adaptations of signalling or alarm devices
• G09B 25/00 - Models for purposes not provided for in group , e.g. full-sized devices for demonstration purposes

Abstract

Disclosed is an intelligent experimental apparatus for cooperative mining of co-associated resources. The apparatus is capable of achieving intelligent in-situ simulation of co-associated resource mining, and the monitoring and analysis of multi-field coupling evolution characteristics. The apparatus comprises: a signal transmission mechanism, a pressure maintaining mechanism, a feeding mechanism, and a reaction mechanism. The signal transmission mechanism comprises a centralized controller (1), an annunciator (4), a signal receiver (16), a power supply, a power cord, a signal transmitter (13), and a signal sensing valve (23). The pressure maintaining mechanism comprises a confining pressure oil cavity (2), an axial pressure oil cavity (3), a confining pressure pump (5), an axial pressure pump (6), a confining pressure liquid distribution tank (7), an axial pressure liquid distribution tank (8), an integrated pressure distribution pipe (9), and a hydraulic transmission pipe (32). The feeding mechanism comprises a monitoring analyzer (18), a temperature controller (19), a solution conveying pipe (20), a seepage pump (21), a mixing transport pipe (22), a comprehensive liquid separator (24), an aggregate cavity (25), a liquid cavity (26), an oil cavity (27), an air cavity (28), a mixing cavity (29), and an analysis purifier (31). The reaction mechanism comprises a uranium ore cavity (10), a coal seam cavity (11), an oil and gas cavity (12), a nuclear magnet (17), a temperature and hydraulic pressure sensor (14), and a shearing gasket (30).

IPC Classes  ?

• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21C 41/22 - Methods of underground miningLayouts therefor for ores, e.g. mining placers

Abstract

A flocculating, grading, and dewatering device includes a tank body, a mixing zone, a flocculent settling zone, a centrifugal dewatering zone, and a particle screening zone. An initial material is mixed with a chemical agent for a flocculation reaction, a lower sediment material settles and an upper liquid overflows. In the centrifugal dewatering zone, a screen basket is allowed to rotate to facilitate a centrifugal movement of the sediment material, water in the sediment material moves into a guide cavity and then flows to a centrifugate outlet, and then a dewatered material in the screen basket is removed out of the screen basket. In the particle screening zone, a screening mechanism screens particles of different size grades in the dewatered material, and water generated flows downward and is discharged; liquids discharged from the centrifugate outlet and the overflow port are combined, and then discharged through a mixed liquid outlet.

IPC Classes  ?

• B01D 21/24 - Feed or discharge mechanisms for settling tanks
• B01D 21/08 - Settling tanks provided with flocculating compartments
• B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
• B04B 3/06 - Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneously sifting or filtering discharging solid particles by vibrating the bowl

Abstract

The present invention provides a method for implementing continuous extraction of gas by high-position drilling in a working face stoping process, comprising the following steps: (1) forming drill sites on air return roadway sides, and constructing three roadway high-position drill holes in each drill site, drill hole opening points being located on the air return roadway sides, and final hole points being located at different height positions in the area of a fracture zone of a goaf; (2) constructing a top plate high-position drill hole on a roadway top plate above each drill site, the drill hole opening points being located on the roadway top plates, and the final hole points being located in the area of the fracture zone of the goaf; (3) mounting casings and gas drainage pipes in the constructed high-position drill holes; and moreover, connecting gas concentration online monitoring devices to orifices; and (4) performing a stoping operation to continuously extract gas. According to the present invention, the high-position drill holes are arranged in a mode of combining "stubble cleaning arrangement" with "top plate hole arrangement", and final holes of the drill holes are located on different layers in the fracture zone above the goaf, such that the gas in the goaf can be detected and extracted in all directions, and the continuous extraction of the gas is ensured.

IPC Classes  ?

• E21F 7/00 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose
• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21B 7/00 - Special methods or apparatus for drilling
• E21B 33/13 - Methods or devices for cementing, for plugging holes, crevices or the like

Abstract

Disclosed in the present application is a coplanar waveguide-fed flexible wearable ultra-wideband antenna with quadruple notch bands, the flexible wearable ultra-wideband antenna comprising a flexible substrate, wherein a ground flat face, a radiation patch and a feed line are provided on the flexible substrate; the feed line and the radiation patch are provided with resonant slots; the flexible substrate is made of an insulating flexible material; and the feed line, the radiation patch and the ground flat face are made of a conductive flexible material. The coplanar waveguide-fed flexible wearable ultra-wideband antenna with quadruple notch bands can be prepared by means of a layer-by-layer assembly technique and a spray-printing or printed circuit board process, and has the advantages of small size, low profile, compact structure, being convenient to manufacture, good conformal property, good wearable performance, etc.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 1/48 - Earthing meansEarth screensCounterpoises
• H01Q 1/50 - Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

A measurement system and method for a thermal diffusion coefficient of an orthotropic solid material. The system comprises a measurement sample (1), a constant-temperature water bath tank, a sample fixing device and a data acquisition system, wherein the constant-temperature water bath tank comprises a water bath tank body (2), a water bath tank cover (3) and a water bath tank controller (4); the sample fixing device comprises a fixing cover (5), adjusting bolts (6), a fixing cross (7), a graphene sticker (8), a thermal insulation material (9) and a thermal-resistant rubber band (10); and the data acquisition system comprises a thermocouple (11), an A/D converter (12), a voltage-stabilized power supply (13), a USB-to-RS485 communication converter (14) and a notebook computer (15). On the basis of an unsteady-state thermal conduction product method, a sample constant-temperature boundary is constructed by using a constant-temperature water bath and the graphene sticker (8), a sample thermal-insulation boundary is constructed by using the thermal insulation material (9), a three-dimensional orthogonal unsteady-state thermal transfer model is established, and the first six items of a series are taken and combined with a random conjugate gradient method to achieve simultaneous inversion of thermal diffusion coefficients of an orthotropic solid material in x, y and z directions.

IPC Classes  ?

• G01N 25/20 - Investigating or analysing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity

Abstract

A test bench for factory quality comprehensive performance quantitative testing of an RV reducer (6) and a detection method therefor, the test bench comprising an eccentric sleeve (12) which is provided on a sensor first shaft (4), the exterior of the eccentric sleeve (12) being sleeved with a sensor outer cylinder (14), and the eccentric sleeve (12) rotating with the sensor first shaft (4) and a sensor second shaft (8). A displacement signal between a laser displacement sensor (3) and the eccentric sleeve (12) is acquired in real time by means of the high-precision laser displacement sensor (3), and a feature signal curve is obtained by using a data acquisition card and by means of a LabVIEW design data acquisition system to calculate, after performing spectral transformation, the transmission ratio of an input shaft to an output shaft of the RV reducer (6), and a transmission error of the RV reducer (6) can be obtained by comparing a theoretical transmission ratio with an actual transmission ratio. The combination of the high-precision laser displacement sensor (3) and the eccentric sleeve (12) achieves contactless measuring, and can accurately capture and recognize a feature signal of the RV reducer (6).

IPC Classes  ?

• G01M 13/025 - Test-benches with rotational drive means and loading meansLoad or drive simulation
• G01P 3/44 - Devices characterised by the use of electric or magnetic means for measuring angular speed
• G01L 3/00 - Measuring torque, work, mechanical power, or mechanical efficiency, in general

Abstract

Methods for modifying a recycled fine powder of concrete and uses thereof. A method for modifying a recycled fine powder can include: crushing a collected waste concrete block with a crusher, grinding with a ball mill, and passing through a 100-mesh sieve, to obtain a recycled fine powder with d50 of 13.5 μm; placing the obtained recycled fine powder in a dry environment at a high temperature, drying, then taking out, and cooling to room temperature; preparing tannic acid solutions with different concentrations, mixing the cooled recycled fine powder with the prepared tannic acid solutions, and continuously stirring by a glass rod.

IPC Classes  ?

• B28C 5/00 - Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
• B28C 7/00 - Controlling the operation of apparatus for producing mixtures of clay or cement with other substancesSupplying or proportioning the ingredients for mixing clay or cement with other substancesDischarging the mixture
• B28C 5/12 - Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials

Abstract

A gas-liquid spray dust settlement system for a fully mechanized mining face includes an atomization humidification subsystem, a boundary mist curtain subsystem, and a dust mist recycling subsystem that are all arranged outside the fully mechanized mining face, where the boundary mist curtain subsystem includes high-pressure blade nozzles mounted to hydraulic supports. The atomization humidification subsystem includes a spray dust settler mounted to a rocker arm of a coal cutter and configured to spray water mist completely covering the high-pressure blade nozzle. The dust mist recycling subsystem includes a wind-water linkage dust remover mounted to a semi-encircling support base, arranged under the spray dust settler, and configured to collect the water mist sprayed by the spray dust settler.

IPC Classes  ?

• E21F 5/04 - Spraying barriers
• E21C 35/22 - Equipment for preventing the formation of, or for removal of, dust

Abstract

A high-sensitivity flexible three-dimensional force tactile sensor and a preparation method. The flexible three-dimensional force tactile sensor comprises: a hemispherical contact (1), the hemispherical contact (1) comprising a tray (12) of which the surface being provided with a recess (13), and a hemispherical bulge provided in the recess (13); a flexible inverted cone assembly (2) connected to the lower surface of the hemispherical contact (1), flexible triangular excitation electrodes (3) being provided on the side surface of the flexible inverted cone assembly (2); and a flexible common electrode (4) surrounding part of each flexible triangular excitation electrode (3), a first cavity (40) having an opening and consistent with the flexible inverted cone assembly (2) in appearance being formed in the flexible common electrode (4), the flexible triangular excitation electrodes (3) and part of the flexible inverted cone assembly (2) being provided in the first cavity (40) of the flexible common electrode (4), and the flexible triangular excitation electrodes (3) and the flexible inverted cone assembly (2) being not in contact with the inner wall of the first cavity (40) of the flexible common electrode (4) to form an air cavity.

IPC Classes  ?

• G01L 1/14 - Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
• G01L 1/26 - Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
• G01L 5/165 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in capacitance

Abstract

A system of monitoring vibration of a blasting model test for a jointed rock mass and a method are provided. The system includes: a loading subsystem for three-way load, a model-surface blasting-vibration acquisition subsystem, and a model-interior dynamic stress-strain acquisition subsystem. The system and the method are provided, and a blasting model for a transparent jointed rock mass and a monitoring method that are obtained can analyze the influence of a joint inclination angle on propagation and attenuation laws of blasting stress waves in the jointed rock mass, and can analyze the influence of different millisecond blasting modes on the stability of an existing tunnel in the jointed rock mass, and can capture a real-time dynamic evolution process of cracks. The stress and strain measurement technologies used can perform omnibearing monitoring and recording for large deformations of surrounding rock under blasting load, and can resist the electromagnetic interference.

IPC Classes  ?

• G01N 3/313 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force generated by explosives
• E21D 9/00 - Tunnels or galleries, with or without liningsMethods or apparatus for making thereofLayout of tunnels or galleries
• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 33/24 - Earth materials
• G01V 20/00 - Geomodelling in general

Abstract

The present invention relates to a photoelectric coal and gangue sorting device and a sorting method therefor. The device comprises a support frame, a coal and gangue separation screen body, a sealing upper cover, a sieving mechanism, a driving mechanism, a separating and conveying mechanism, a positioning plate and a sorting unit; the coal and gangue separation screen body, on the top of which is provided with the sealing upper cover and inside of which is provided with the separating and conveying mechanism, is fixedly installed on one side of the support frame by means of bolts; the side wall of the positioning plate, which is arranged above the separating and conveying mechanism, is fixed to the inner wall of the coal and gangue separation screen body by means of spot welding.

IPC Classes  ?

• B07B 1/46 - Constructional details of screens in generalCleaning or heating of screens
• B07B 13/16 - Feed or discharge arrangements
• B07B 1/14 - Roller screens
• B07B 1/42 - Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

Abstract

Disclosed are a synergistic heat stabilizer and the use thereof in improving heat stability of PVC. The synergistic heat stabilizer comprises organic tin, cerium metallic soap and butyl titanate as active components, is enhanced after microwave radiation by means of the crosslinking effect between a butyl titanate coupling agent and tin, and between cerium metal and PVC, and can be used to prepare a novel PVC composite film material which has excellent heat stability effect and has potential microwave radiation resistance.

IPC Classes  ?

• C08K 9/04 - Ingredients treated with organic substances
• C08K 5/10 - EstersEther-esters
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/58 - Organo-tin compounds containing sulfur

Abstract

A sprayer for settling dust of a coal mine includes: an outer housing, having at least one opening configured to spray water mist; a sprayer, placed in the outer housing, configured to spray water mist through the opening; a plurality of water curtain nozzles, configured to spray water curtain lines outside the opening to block suspended dust; and a support, configured to support the outer housing. The water curtain nozzles are in an equidistant arrangement around a center of the opening. A plurality of the water curtain nozzles are constructed such that the nozzles are all oriented toward the same point, to form a circular or conical water curtain.

IPC Classes  ?

• E21F 5/04 - Spraying barriers
• B01D 47/06 - Spray cleaning
• E21F 5/20 - Drawing-off or depositing dust
• E21F 5/02 - Means or methods for preventing, binding, depositing or removing dustPreventing explosions or fires by wetting or spraying

Abstract

A coal and gangue identification device is disclosed. The device includes a rotary supporting frame, a water injection unit, a weighing unit, a liquid level detection device and a processing module. The rotary supporting frame is provided with a loading unit used to load a mineral aggregate. The rotary supporting frame is used to drive the loading unit to rotate on a horizontal plane. In the rotating process of the rotary supporting frame, the loading unit cyclically passes through a water injection region, a material adding region, a volume measurement region and an unloading region which are sequentially disposed on a rotation trajectory of the rotary supporting frame. The water injection unit is used to inject water to the loading unit of the water injection region.

IPC Classes  ?

• G01N 9/02 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by measuring weight of a known volume
• B07C 5/22 - Sorting according to weight using a plurality of stationary weighing mechanisms
• B07C 5/36 - Sorting apparatus characterised by the means used for distribution
• G01N 33/22 - FuelsExplosives

Abstract

The present invention proposes a coal and gangue separation device, including a first supporting seat, a guide part and multiple material bins. The guide part is hinged with the first supporting seat; the guide part rotates in a vertical direction; and inlets of the plurality of material bins are sequentially distributed on a rotation track of a movable end of the guide part. In the coal and gangue separation device of the present invention, the high-pressure airflow of a high-pressure nozzle does not directly act on the materials, but on grate bar driving mechanisms; and cantilever grate bars are driven to rotate by the grate bar driving mechanisms so as to directionally discharge the mineral aggregate. Therefore, the gangue can accurately enter a gangue collection bin; and the clean coal can accurately enter a clean coal collection bin.

IPC Classes  ?

• B03B 9/00 - General arrangement of separating plant, e.g. flow sheets
• B03B 7/00 - Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
• B07C 5/34 - Sorting according to other particular properties
• B07C 5/36 - Sorting apparatus characterised by the means used for distribution

Abstract

3@fine composite. With the dielectric property and conductivity adjusted, the composite prepared reveals a good impedance matching performance and an improved MA performance.

IPC Classes  ?

• C09C 1/04 - Compounds of zinc
• C09C 3/06 - Treatment with inorganic compounds
• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields

Abstract

A movable photoelectric sorting robot for coal and gangue. The robot comprises a vibration feeding module (1), a conveying module (2), a dual-energy X-ray identification and decision module (3) and a coal and gangue separation module (4). A dual-energy X-ray source (32) is fixedly mounted in a mounting box (31) and is located right above a conveying belt; an X-ray flat panel detector (33) is mounted right below an empty belt (21) of the conveying module and corresponds exactly to the dual-energy X-ray source; a measurement and control instrument (35) is in electrical signal connection with the dual-energy X-ray source; and a power supply apparatus (36) is used for supplying power to the measurement and control instrument, the dual-energy X-ray source and the X-ray flat panel detector. By means of the movable photoelectric sorting robot for coal and gangue, the real-time intelligent sorting of coal and gangue can be realized in an underground mine; and compared with an underground jigger, a dense medium cyclone, etc., the present invention optimizes coal sorting technology, increases the coal and gangue sorting rate, reduces the occupied area of a chamber, and improves the coal quality.

IPC Classes  ?

• B07C 5/34 - Sorting according to other particular properties
• B07C 5/02 - Measures preceding sorting, e.g. arranging articles in a stream, orientating