The present disclosure discloses a detection method and system of power equipment based on a multispectral image, and relates to the field of smart grid information technology. The method includes: obtaining an image of power equipment to be detected, where the image is one of an infrared image, an ultraviolet image, and a visible image; inputting the image into a pre-trained pixel-based power equipment detection model for detection, and performing classified prediction on pixels in the image to obtain a predicted result; and outputting a predicted image based on the predicted result, where the predicted image is power equipment image with background information removed, and is marked with a name of each piece of equipment. With the implementation of the present disclosure, efficiency and accuracy of power equipment detection can be improved.
G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
G06V 10/77 - Processing image or video features in feature spacesArrangements for image or video recognition or understanding using pattern recognition or machine learning using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]Blind source separation
2.
AUTOMOBILE PART SEMANTIC SEGMENTATION AND INNOVATION/FUSION METHOD BASED ON DEFORMABLE CONVOLUTIONAL NETWORK LARGE MODEL
predictpredictadjustedpredictbesttestbesttesttesttest, independently segmenting different parts to realize fusion design of automobile styling. The present invention can implement efficient and high-precision semantic segmentation of automobile parts, so as to support rapid iterative fusion and innovation of automobile styling design.
G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
22 dispersion to an elastomer prepared from PDMS and a normal-temperature curing agent, and mixing same until uniform to obtain a coating solution, wherein the PDMS has a viscosity of 3,000-4,000 Pa·s and a molecular weight of 120,000-130,000; and the normal-temperature curing agent is a normal-temperature curing agent containing no carbon-carbon triple bond, and comprises one of methyltriethoxysilane, methyltripropoxysilane, diphenylbutyl carbamate or dibenzoyl peroxide.
The invention relates to an isolated DC power supply utilizing a Class-E inverter and its design method, within the field of power electronics and high voltage technology. This DC power supply comprises a DC power source, a Class-E inverter, a CL network, a series resonant unit, and a rectifier circuit, featuring two structures. It is characterized by a single switching device and a stable output voltage that does not vary with load changes. This resolves stability issues commonly associated with isolated DC power supplies based on Class-E inverters. The invention also introduces a design method that includes calculating core parameters like capacitors and inductors, ensuring optimal component selection. Offering strong isolation, constant voltage output, high efficiency, and cost-effectiveness, this DC power supply is ideal for use in wireless power transfer systems, high-frequency power supplies, and isolated sensor and gate driver power supplies.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
5.
PT PRIMARY VOLTAGE RECONSTRUCTION METHOD BASED ON INVERSE BLACK BOX MODEL AND INVERSE ELECTROMAGNETIC DUALITY MODEL
A method for reconstructing a primary voltage of a potential transformer (PT) based on an inverse black box model and an inverse electromagnetic duality model includes: collecting a secondary voltage signal of a power system by the PT, and dividing the secondary voltage signal into a low-frequency voltage component and a high-frequency voltage component; performing primary voltage reconstruction by applying the inverse black box model on the high-frequency voltage component, to obtain a primary-voltage high-frequency voltage component; performing primary voltage reconstruction by applying the inverse electromagnetic duality model on the low-frequency voltage component, to obtain a primary-voltage low-frequency voltage component; and integrating the primary-voltage high-frequency voltage component and the primary-voltage low-frequency voltage component, to obtain the primary voltage of the power system.
The invention discloses a method and system for preparing multi-compound ester insulating oil. The method utilizes vacuum esterification, involving esterification of pentaerythritol and fatty acid, followed by vacuum distillation, adsorption, washing, suction filtration, and vacuum drying to produce pure synthetic ester insulating oil. By detecting saturated fatty acid content, polarization strength, and closed-cup flash point, the most suitable natural ester insulating oil is selected. Ten different proportions of mixed ester insulating oils are obtained through blending and tested for mass and heat changes in nitrogen and air environments. Dielectric performance parameters at varying temperatures are analyzed to calculate activation energy. The resulting mixed ester insulating oil, NSE3 (85 vol % KA+15 vol % FR3), exhibits a high flash point, low pour point, and high AC breakdown voltage, offering excellent comprehensive performance. The physical, chemical, electrical, and thermal properties, along with the activation energy, have been significantly enhanced.
mainstoragecutconloaddcdc. The provided inductive energy-storage forming line type nanosecond pulse generator having an output pulse regulation and control capability regulates and controls, by means of two switches, an electromagnetic wave transmission process in a transmission line during pulse forming while having a high-gain nanosecond square-wave pulse output capability, thus realizing the output impedance matching modulation of a pulse source and having good practical value in biomedical applications.
H03K 3/57 - Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
H02M 9/04 - Conversion of DC or AC input power into surge output power with DC input power using capacitative stores
H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
8.
BALANCED TRANSFORMATION POWER DIRECTIONAL COUPLER FOR SHORT-PULSE POWER LINEAR SUPERPOSITION
A balanced transformation power directional coupler for short-pulse power linear superposition, comprising a first coaxial transmission line, a second coaxial transmission line and a magnetic ring. The present invention can solve the problem of power saturation in existing short-pulse power synthesis methods, and achieves power linear superposition; the present invention can achieve conversion of two unbalanced pulses to one balanced pulse, and the pulse has relatively good anti-interference performance in a transmission process; the present invention has a small spatial volume, and can reduce the volume of a pulse generator when applied to inductive energy storage-pulse forming line (IES-PFL)-based power synthesis, thereby implementing a compact design; and components used in the present invention have low manufacturing costs and thus achieve high economical efficiency.
H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
9.
INFRARED THERMAL IMAGING DEFECT DETECTION METHOD AND APPARATUS FOR SUBSTATION INSULATOR
The present disclosure discloses an infrared thermal imaging defect detection method and apparatus for a substation insulator. An infrared module is bidirectionally connected to a core computing module, and an infrared module is unidirectionally connected to a high-rate battery. The core computing module is unidirectionally connected to a touch screen. The infrared module is configured to obtain infrared radiation information through a lens, and calculate and generate a temperature distribution video. The method includes infrared video acquisition, thermal region segmentation, device type determination, key temperature information extraction, defect diagnoses, result display and result saving.
G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
G01J 5/48 - ThermographyTechniques using wholly visual means
G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks
10.
INTEGRATED MAGNETIC COUPLING MECHANISM FOR IMPROVING POWER DENSITY OF WPT SYSTEM, AND WPT SYSTEM
ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF GUANGXI POWER GRID CO., LTD. (China)
CHONGQING UNIVERSITY (China)
Inventor
Mo, Yuhong
Xiao, Jing
Tang, Chunsen
Wu, Xiaorui
Wang, Jianxin
Zhou, Ke
Gong, Wenlan
Han, Shuai
Zhuo, Haoze
Chen, Weidong
Abstract
BSBB into two coils, and connecting the two coils in a full-bridge rectifier circuit at a receiving end of a WPT system. In this way, it can be ensured that the currents in the two coils are always at positive values, thereby achieving a corresponding current-doubling effect, improving the power density of the system, and reducing the weight of an on-board end. Moreover, by means of designing the inductance value of the current-doubling coil, ripples in an output voltage can be reduced while ensuring output power remaining unchanged. In the present invention, providing a current-doubling rectifier topology of a current-doubling inductive coil is also applicable to other circuit topologies having the problem of excessive inductance, and the present invention has the universal applicability characteristic for a circuit topology in wireless transmission.
H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/14 - Arrangements for reducing ripples from DC input or output
11.
Method for preparing sintered anode aluminum foil and sintered anode aluminum foil
The invention discloses a method for manufacture sintered anode aluminum foil. Ultrasound was used to change the stacking structure of aluminum powder on the surface of the anode aluminum foil, allowing aluminum powder particles of different sizes to form a gradient distribution in the thickness of the aluminum powder layer, with a gradual decrease in average particle size from bottom to top, larger voids in the lower layer, and denser and larger surface area in the upper layer. Therefore, the specific capacitance and the withstand voltage were improved. By introducing ultrasonic vibration, this invention can simultaneously enhance the specific capacitance and withstand voltage of anode aluminum foil after high-temperature sintering and anodizing, while traditional sintering methods cannot obtain high specific capacitance and withstand voltage performance simultaneously.
B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
B22F 1/107 - Metallic powder containing lubricating or binding agentsMetallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
B22F 9/08 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
C23C 24/08 - Coating starting from inorganic powder by application of heat or pressure and heat
ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF GUANGXI POWER GRID CO., LTD (China)
CHONGQINGUNIVERSITY (China)
Inventor
Xiao, Jing
Zhou, Ke
Li, Xiaofei
Chen, Fengwei
Wu, Xiaorui
Gong, Wenlan
Zhuo, Haoze
Han, Shuai
Lin, Rui
Chen, Weidong
Wu, Jianhao
Wu, Ning
Chen, Shaonan
Mo, Yuhong
Zhang, Longfei
Guo, Min
Hou, Lijie
Guo, Xiaoxuan
Lu, Jianbin
Yan, Hao
Abstract
An electric vehicle wireless charging system for performing identity (ID) authentication on the basis of a PDM characteristic wave. After an electric vehicle stops in a charging area, by means of controlling the pulse density of an inverter switch of a charging end, the system transmits to the electric vehicle an electric energy signal carrying ID information of the charging end, and the electric vehicle identifies an ID signal and is connected to the charging end and then returns an ID signal of the electric vehicle, such that ID authentication and communication connection between the electric vehicle and the charging end before charging are realized. IDs of different charging ends are defined by means of the switching frequencies of switches, and different switching frequencies correspond to different pieces of ID information, such that the advantages of high accuracy and simple detection are achieved. On the basis of a wireless electric energy transmission method, the switching frequencies of switches correspond to different electric energy transmission values, ID information of a charging end is transmitted to an electric vehicle by means of electric energy, and other additional devices are not required during an ID authentication process, such that the structure is simple, and the cost is saved on.
Provided is an internal meshing cylindrical gear pair with a constant meshing characteristics constructed tooth pair. The internal meshing cylindrical gear pair with a constructed tooth pair includes an external cylindrical gear with a constructed tooth pair and an internal cylindrical gear with a constructed tooth pair based on conjugate curves. In the present disclosure, normal tooth profile curves of the external cylindrical gear with a constructed tooth pair and the internal cylindrical gear with a constructed tooth pair are continuous combined curves with the same curve shape, which facilitates machining by the same cutter. A common normal at an inflection point or a tangent point of the continuous combined curve passes through a pitch point of the gear pair, and a position of the inflection point or the tangent point can be adjusted as required, so as to adjust a sliding ratio of the gear pair.
F16H 1/08 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes the members having helical, herring-bone, or like teeth
F16H 1/10 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes one of the members being internally toothed
F16H 1/24 - Toothed gearings for conveying rotary motion without gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth
14.
Herringbone Gear Pair With Constant Meshing Characteristics Constructed Tooth Pair
Provided is a herringbone gear pair with a constant meshing characteristics constructed tooth pair. The herringbone gear pair with a constructed tooth pair includes a herringbone gear I with a constructed tooth pair and a herringbone gear II with a constructed tooth pair based on conjugate curves. In the present disclosure, normal tooth profile curves of the herringbone gear pair with a constructed tooth pair are continuous combined curves with the same curve shape, which facilitates machining by the same cutter. A common normal at an inflection point or a tangent point of the continuous combined curve passes through a pitch point of the gear pair, and a position of the inflection point or the tangent point can be adjusted according to an actual demand. A contact ratio of the herringbone gear pair with a constructed tooth pair is designed as an integer.
F16H 1/08 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes the members having helical, herring-bone, or like teeth
F16H 1/24 - Toothed gearings for conveying rotary motion without gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth
15.
METHOD FOR DC-BUS CAPACITANCE MINIMIZATION OF HYBRID CLAMPED CONVERTER
The present invention provides a method for DC-bus capacitance minimization of hybrid clamped converter (HCC), which includes: obtaining the system parameters of the HCC during operation; determining the reference wave; determining the duty ratio of each switch according to the reference wave; determining the total neutral point current of the system; the fundamental component of the upper and lower DC-bus capacitor voltage of the system; determining the maximum voltage fluctuation of the upper and lower DC-bus capacitors; determining the minimum DC-bus capacitance value that satisfies the requirements of system capacitor voltage fluctuation by traversing the capacitance value. The present invention not only reduces the design complexity and cost of the high-power HCC system, but also improves the power density and reliability of the converter.
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
An aluminum oxide film structure for heat dissipation and cooling of a high-voltage bare conductor and a preparation method, relating to the technical field of wires and cables. The aluminum oxide film structure is an aluminum oxide film layer having a single hole or dual-layer composite hole structure and generated on the outermost surface of a pure aluminum conductor or aluminum conductor aluminum clad steel reinforced; the thickness of the aluminum oxide film layer is 15-30 μm; the hole gap range of single holes or dual-layer composite holes is 100-300 nm; and the hole diameter range of the single holes or the dual-layer composite holes is 30-300 nm. Compared with a bare conductor, the aluminum oxide film structure enables an aluminum conductor or an aluminum stranded conductor to have low-current temperature rise characteristics at the same current and better faster heat dissipation and cooling characteristics.
Provided is an external meshing cylindrical gear pair with a constant meshing characteristics constructed tooth pair. The external meshing cylindrical gear pair with a constructed tooth pair includes a cylindrical gear I with a constructed tooth pair and a cylindrical gear II with a constructed tooth pair based on conjugate curves. In the present disclosure, normal tooth profile curves of the cylindrical gear I with a constructed tooth pair and the cylindrical gear II with a constructed tooth pair are continuous combined curves with the same curve shape, which facilitates machining by the same cutter. A common normal at an inflection point or a tangent point of the continuous combined curve passes through a pitch point of the gear pair, and a position of the inflection point or the tangent point can be adjusted according to an actual demand. A contact ratio is designed as an integer.
A bevel gear pair with constant meshing characteristics with a constructed tooth pair is provided. The bevel gear pair with a constructed tooth pair includes a bevel gear I with a constructed tooth pair and a bevel gear II with a constructed tooth pair based on conjugate curves. In the present disclosure, a normal tooth profile curve of the bevel gear I with a constructed tooth pair and a normal tooth profile curve of the bevel gear II with a constructed tooth pair are continuous combined curves with the same curve shape, which facilitates machining by the same cutter. A common normal at an inflection point or a tangent point of the continuous combined curve passes through a pitch point of the bevel gear pair with a constructed tooth pair, and a position of the inflection point or the tangent point can be adjusted according to an actual demand.
F16H 1/14 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising conical gears only
Provided is a herringbone planetary gear transmission device with a constant meshing characteristics constructed tooth pair, which relates to the technical field of gear transmission. The transmission device includes a sun gear with a constructed tooth pair, a planetary gear with a constructed tooth pair and an internal gear with a constructed tooth pair based on conjugate curves. Normal tooth profiles of the gears with a constructed tooth pair in the present disclosure are all the same combined curve and can be machined by using the same cutter. A common normal at an inflection point or a tangent point of the curve passes through a pitch point of a meshing gear pair, and a sliding ratio of the meshing gear pair is adjusted according to an adjusted position of the inflection point or the tangent point. A contact ratio of the meshing gear pair is designed as an integer.
F16H 1/34 - Toothed gearings for conveying rotary motion with gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth
A pressure-free membrane-type oxygen permeation biofilm reactor driven by sewage thermal energy includes an aeration element, the aeration element is internally provided with a nonporous hollow fiber membrane, and two ends of the nonporous hollow fiber membrane are connected to a cold air chamber and a hot air chamber respectively. A temperature difference is formed between the cold air chamber and the hot air chamber, which can promote air flow inside the membrane and promote mass transfer of oxygen within a biofilm. A problem that energy consumption of sewage purification is unable to compensate due to a low thermal energy grade in sewage can be solved. A high efficiency of oxygen mass transfer is realized, stable functional zones of the biofilm are divided, and a sewage purification efficiency is improved. Dissolved methane can be used as an internal carbon source generated by anaerobic digestion to reduce nitrite in sewage.
The present disclosure a rapid degradation and mineralization method of per- and polyhalogenated organic pollutants (PHOPs), including injecting organic wastewater containing the PHOPs into a reaction chamber with a cathodic/anodic electrode system, adding an electrolyte to the organic wastewater and stirring evenly; adding a peroxide I and a peroxide II to the organic wastewater, and turning on a DC stabilized power supply and conducting a reaction, and at the end of the reaction, completing purification of the PHOPs in the wastewater. According to the present disclosure, peroxymonosulfate (PMS) and H2O2 are combined in electrolysis to accelerate the PMS decomposition in solution and produce more reactive oxygen species such as, ·SO4−, OH, singlet oxygen (1O2), and a superoxide anion free radical (O2−), thereby achieving cooperative of multiple oxidative and reductive reactive oxygen species, and especially increasing the generation of ·SO4− significantly.
The present disclosure discloses an electrochemical regeneration method of activated carbon, including the following steps of placing activated carbon saturated with an organic compound into an electrolysis system containing a regeneration solution to serve as a cathode of the electrolysis system, adding a peroxide I and a peroxide II to the regeneration solution, connecting to power and conducting a reaction, and after the reaction is completed, taking out and drying the activated carbon to obtain regenerated activated carbon, where the peroxide I is a persulfate. The present disclosure is easy to operate and requires no addition of a metal ion. Many technologies are used and cooperated with each other to produce oxidative and reductive active species synchronously, thereby achieving efficient degradation and mineralization of refractory organic pollutants.
B01D 15/20 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
B01J 20/20 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbonSolid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising carbon obtained by carbonising processes
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
23.
SUSPENDED MICROALGAE BIOFILM PARTICLE REACTOR AND SEWAGE TREATMENT METHOD
A suspended microalgae biofilm particle reactor comprises a housing (8), at least one light source (7), a lamp sleeve (6), and an aerator (9). The housing (8) is configured to store sewage, fixed particles in the sewage are capable of adsorbing microalgae cells added to the housing (8) to form microalgae biofilm particles (11), a side surface of a bottom portion of the housing (8) is provided with a liquid discharge pipe (10), and an upper portion of the housing (8) is provided with a liquid inlet pipe (4) and an exhaust port (2); a plurality of light sources (7) are disposed in a cavity of the housing (8), the plurality of light sources (7) are arranged at intervals, and the light sources (7) are configured to provide light and heat for the suspended microalgae biofilm particles (11); lamp sleeves (6), are each sleeved around each light source (7), the lamp sleeves (6) seal the light sources (7), and the lamp sleeves (6) are capable of transmitting light; and an aerator (9) is disposed at the bottom portion of the housing (8) and configured to aerate the sewage in the housing (8). Further provided is a sewage treatment method.
++Δt at a moment t+Δt. Subsequently, it computes and assesses the respective fouling levels using the electrochemical information values derived from the membrane fouling prediction model. Finally, it issues an early warning signal contingent upon the determined warning level. This methodology facilitates proactive understanding and management of membrane fouling, thereby sustaining the normal operation of the membrane fouling treatment system, mitigating the propensity for membrane assembly fouling, and prolonging the operational lifespan of the membrane assembly.
G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
B01D 65/10 - Testing of membranes or membrane apparatusDetecting or repairing leaks
C02F 1/46 - Treatment of water, waste water, or sewage by electrochemical methods
G01N 15/12 - Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
G06N 3/04 - Architecture, e.g. interconnection topology
G06N 3/044 - Recurrent networks, e.g. Hopfield networks
An electric-multiple-unit gear drive experiment system under simulated wheel-rail excitation. The system comprises a gear drive experiment table and an excitation apparatus (3, 16), wherein the gear drive experiment table performs no-load and load experiments on a gear drive system (8) under the action of the excitation apparatus (3, 16), so as to simulate changes in dynamic characteristics of the gear drive system (8) in a wheel-rail excitation environment. Thus, a basic experiment for a gear drive system of an electric multiple unit can be developed, and wheel-rail excitation to which the gear drive system is subjected during the operation of the electric multiple unit can also be simulated. Further provided is an electric-multiple-unit gear drive experiment method under simulated wheel-rail excitation.
G01M 13/026 - Test-benches of the mechanical closed-loop type, i.e. having a gear system constituting a closed-loop in combination with the object under test
A multivalent manganese oxide filler and a preparation method therefor and a use thereof. The preparation method comprises the following steps: step 1: adding an Eucalyptus robusta leaf extract into a potassium permanganate solution to implement an oxidation reaction, and stirring to finally form a suspension; step 2: successively filtering and drying the suspension in step 1 to obtain a sintering precursor; and step 3: sintering the sintering precursor to prepare a multivalent manganese oxide filler. A multivalent manganese oxide filler containing divalent manganese, trivalent manganese, and tetravalent manganese is prepared by combining an oxidation reaction and a sintering reaction, and the filler is of a loose porous shape. In addition, the combination of the oxidation reaction and the sintering reaction reduces the process difficulty of preparation of a multivalent manganese oxide, and facilitates later industrialization to a certain extent.
Disclosed are an automatic remote water supply system in a low gravity environment, which includes a water supply unit, an environment detection unit and a control unit. The water supply unit includes a water bag, an air inlet pipe, a water pipe and a water pump on the water pipe. The bottom of the water bag has an air inlet and a water outlet. The air inlet pipe is communicated with the water bag through the air inlet. The water pipe is communicated with the water bag through the water outlet. The environment detection unit is configured to detect environmental information in the ecosystem to which the water supply system belongs in the low gravity environment. The control unit is configured to control the starting state of the water pump according to the environmental information, so that water in the water bag flows out through the water pipe.
The present invention discloses a multivalent manganese oxide filler, a preparation method therefor, and an application thereof. The preparation method comprises the following steps: step 1: adding a Eucalyptus robusta Smith leaf extract into a potassium permanganate solution for oxidation reaction, and stirring to finally form a suspension; step 2: sequentially filtering and drying the suspension in the step 1 to obtain a sintering precursor; and step 3: sintering the sintering precursor to obtain the multivalent manganese oxide filler. According to the present invention, through the combination of oxidation reaction and sintering reaction in the present invention, the multivalent manganese oxide filler containing manganese (II), manganese (III) and manganese (IV) is prepared, and the filler is loose and porous; in addition, the oxidation reaction and the sintering reaction are combined in the present invention, so that the process difficulty of preparing the multivalent manganese oxide is reduced.
C04B 35/01 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides
C04B 35/626 - Preparing or treating the powders individually or as batches
The present invention relates to a durable active anti-icing lead applied to a low-temperature and high-humidity environment, and a preparation method, which belong to the preparation field of anti-icing materials. The lead has a dendritic composite porous structure generated on an aluminum substrate, and the pores are arranged in upper and lower two layers, wherein the pore diameter of upper-layer pores is smaller than that of lower-layer pores, and the pore depth ratio of the upper-layer pores to the lower-layer pores is 1 : 2; and the interior of the upper-layer pores and the lower-layer pores is filled with a modifier and a lubricating oil.
Provided is an online cooperative control method for soft reduction and heavy reduction in bloom continuous casting. A quantitative relationship of a theoretical ultimate reduction amount to a reduction position is accurately determined according to an offline three-dimensional solidification and heat transfer model for a continuous casting bloom and a three-dimensional reduction model for a continuous casting bloom under thermo-mechanical coupling; a thermal state of a continuous casting bloom, soft reduction and heavy reduction zones, and a total reduction amount are calculated in real time with an online three-dimensional solidification and heat transfer calculation model for a continuous casting bloom; actual reduction amounts of the rollers for soft reduction and heavy reduction are calculated and distributed online based on a real-time equivalent central solid fraction and a theoretical ultimate reduction amount of each reduction roller. Online cooperative control of soft reduction and heavy reduction in bloom continuous casting is realized.
The present invention relates to the field of power device state evaluation, and provides a power transmission line insulator fault detection method based on a deep unfolding super-resolution network (USRNet) and an improved MobileNet-SSD algorithm. The method comprises: carrying out super-resolution reconstruction on an original image by using a USRNet; on the basis of a MobileNet-SSD detection model, clustering labeling boxes by using K-means++, and generating an anchor box matching power transmission line fault target size; changing a multi-scale feature fusion module structure, and introducing six target detection boxes at a prediction end to detect fault small targets; and optimizing the overall performance of the model by using an effective intersection-over-union loss function. On the basis of an improved MobileNet-SSD detection model, insulator identification positioning and fault detection are carried out on an optimized image, to achieve less parameter quantity and less calculation quantity, thereby facilitating embedding into a mobile device and improving small target detection performance.
The present invention relates to the technical field of power device recognition, and provides a power transformation device recognition method based on image fusion and target recognition and diagnosis technology. For implementing the method, an infrared image and a visible light image corresponding to a device need to be fused according to a wavelet transform, to construct a high-quality infrared and visible light fused image library. Then, training is performed by using an SSD target recognition algorithm and using the fused image library as a training set of the algorithm, so as to realize intelligent recognition of a fused image. A target recognition method for the constructed fused image has the advantages that infrared light is not affected by illumination, temperature information can be provided, and the resolution of visible light is clear, thereby implementing accurate recognition and diagnosis of a power transformation device.
G06V 10/80 - Fusion, i.e. combining data from various sources at the sensor level, preprocessing level, feature extraction level or classification level
G06V 10/774 - Generating sets of training patternsBootstrap methods, e.g. bagging or boosting
G06V 10/22 - Image preprocessing by selection of a specific region containing or referencing a patternLocating or processing of specific regions to guide the detection or recognition
G06V 10/40 - Extraction of image or video features
G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks
G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
33.
SIMULTANEOUS DETECTION METHOD AND SYSTEM FOR DISSOLVED GAS AND PARTIAL DISCHARGE IN INSULATING OIL
State Grid Chongqing Electric power Research Institute (China)
Shandong Taikai Transformer Co., Ltd. (China)
Optosky (Xiamen) Optical Ltd (China)
Inventor
Wan, Fu
Chen, Weigen
Luo, Zhiyi
Long, Yingkai
Wang, Pinyi
Du, Lin
Sun, Qiuxia
Zhou, Quan
Wang, Youyuan
Liu, Hongfei
Abstract
The present disclosure relates to a simultaneous detection method and system for dissolved gas and partial discharge in insulating oil, and belongs to the field of electrical devices. The method includes the steps: freely diffusing the dissolved gas in the insulating oil to an F-P optical fiber interference cavity through an oil-gas separation membrane; coupling pump light and probe light into the F-P optical fiber interference cavity through a frequency division multiplexer; making, by an optoacoustic effect of the dissolved gas stimulated by the pump light and an ultrasonic wave generated by the partial discharge, the oil-gas separation membrane vibrate; detecting, by the probe light, vibration of the oil-gas separation membrane, which changes a cavity length, wherein when the probe light is reflected by the oil-gas separation membrane, an interference signal is generated due to the change of the cavity length.
A method and a system for initial self-healing type classification of metallized film capacitors, which relate to the technical field of high-voltage capacitors. The method comprises: applying voltages at different voltage ramp rates to metallized film capacitors to be tested, and determining a voltage bearing range of the metallized film capacitors; determining, according to a corresponding voltage of the metallized film capacitors when initial self-healing occurs and a residual voltage after the initial self-healing occurs, corresponding initial self-healing energy of metallized film capacitors when the initial self-healing occurs; establishing an initial self-healing voltage-energy database according to an initial self-healing voltage of the samples when the initial self-healing occurs and the corresponding initial self-healing energy when the initial self-healing occurs; and classifying the metallized film capacitors by combining an initial self-healing recovery condition and the subsequent service life and performance data of the metallized film capacitors.
Disclosed is a permanent magnet rotor magnetic coupling based on a double-sided stepped structure and a three-dimensional Halbach magnetic pole arrangement, including a conductor outer rotor assembly (1), and a magnet inner rotor assembly (2). The conductor outer rotor assembly (1) includes a right outer rotor assembly (3), and a bearing connected to the right outer rotor assembly (3). The right outer rotor assembly (3) includes a right conductor yoke (301), and multiple conductive rings. The magnet inner rotor assembly (2) includes a right inner rotor assembly (4), and a bearing connected to the right inner rotor assembly (4). The right inner rotor assembly (4) includes a right magnet yoke (401), and multiple magnetic rings. A stepped structure adopted by the present disclosure can make magnetic blocks have multiple polarity arrangement modes, thereby generating multiple different spatial magnetic field distributions, which are used in scenes with different power transfer requirements.
An in-situ detection component for dissolved gases in liquid-phase media and preparation method of the in-situ detection component, the detection component is a drilled hollow-core light guiding device coated with a liquid-gas separation membrane on the outer surface. The liquid-gas separation membrane directly filters the gases dissolved in liquid-phase media into the drilled hollow-core light guiding device, where the laser interacts with the gases and generates the response signals that are transmitted through the hollow-core light guiding device, to realize the simultaneous dissolved gas separation and detection. The present application substantially reduces the time required for liquid-gas separation process in detection components, allowing for fast and accurate in-situ detection of dissolved gases, and integration of liquid-gas separation and detection procedures.
Embodiments of the present disclosure propose an Erasing-based Lossless Floating-point compression method, i.e., Elf. The main idea of Elf is to erase the last few bits (i.e., set them to zero) of floating-point values, so the XORed values are supposed to contain many trailing zeros, where the erased bits are determined based on the decimal place count and the digits on the exponent bits.
H03M 7/24 - Conversion to or from floating-point codes
H03K 19/21 - EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one inputCOINCIDENCE circuits, i.e. giving output only if all input signals are identical
An acceleration sensor includes an upper base plate; a lower base plate; and a gallium-based liquid metal encapsulated in graphene. The lower base plate includes a first surface including at least one diamond channel, and the upper base plate includes a second surface including a metal electrode corresponding to the at least one diamond channel in position; the liquid metal is disposed in a center of the at least one diamond channel; the first surface is bonded to the second surface through an adhesive; the liquid metal is movable in the at least one diamond channel and is in electrical contact with the metal electrode of the upper base plate during movement.
G01P 15/00 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration
B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
G01P 15/12 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by alteration of electrical resistance
39.
DEGRADABLE GLAUCOMA DRAINAGE APPARATUS HAVING SCARRING AND GRADIENT CONTROLLING EFFECTS, AND PREPARATION METHOD THEREFOR
CHONGQING MEDICAL UNIVERSITY AFFILIATED THIRD HOSPITAL (JIE'ER HOSPITAL) (China)
Inventor
Wang, Yong
Li, Xiangji
Abstract
A degradable glaucoma drainage apparatus having scarring and gradient controlling effects, and a preparation method therefor. The apparatus comprises a long-strip-shaped drainage piece (11) having a uniform overall cross-sectional size, the drainage piece (11) being made of a biodegradable material, and a surface of the drainage piece (11) being provided with a drainage gap (12) penetrating two opposite sides of the drainage piece (11); the outer surface of the drainage piece (11) is coated with a biodegradable surface coating (13), an anti-scarring drug being carried in the surface coating (13), the anti-scarring drug being gradually released as the surface coating (13) degrades, and the distribution concentration of the anti-scar drug varying non-monotonically within the surface coating (13). The present apparatus solves problems associated with existing drainage apparatuses such as poor safety, inadequate drainage, lack of reasonable control over the degree of scarring at the implantation site, and ineffective reduction of intraocular pressure, leading to poor efficacy.
A61F 9/00 - Methods or devices for treatment of the eyesDevices for putting in contact-lensesDevices to correct squintingApparatus to guide the blindProtective devices for the eyes, carried on the body or in the hand
4. By adopting the three-component molten salt system of the present invention, recovery rates of rare earth elements extracted from NdFeB waste all can reach 98% or above. By adopting the three-component molten salt system, extraction temperature is 100-400° C. lower than that of all current similar halogenation methods, and extraction time is fold shorted to 1-3 h. The reduction of the extraction temperature and the shortening of the melting time greatly reduce the energy consumption of extracting rare earth elements from NdFeB waste, and the economic benefits are remarkable.
The disclosure provides a flow self-compensating load sensing pump/valve coordinated electro-hydraulic system, including a prime mover, an electronically controlled variable pump, a flow control valve, a hydraulic actuator, a shuttle valve, an electronic control joystick, a bypass control valve, two pressure sensors, a bypass throttle valve, and a control system, where an oil outlet of the shuttle valve is connected to a right spring chamber of the bypass control valve, a left chamber and an oil inlet of the bypass control valve are connected to an oil outlet of the electronically controlled variable pump, an oil inlet and an oil outlet of the bypass throttle valve are connected to an oil outlet of the bypass control valve and an oil tank, two ends of the oil inlet and the oil outlet of the bypass throttle valve are provided with the first pressure sensor and the second pressure sensor, respectively.
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
42.
CELL ELECTROFUSION CHIP DEVICE BASED ON BILATERAL FLOW FIELD PAIRING STRUCTURE ARRAY AND PREPARATION METHOD THEREFOR
The present invention relates to the field of cell electrofusion chips. Disclosed are a cell electrofusion chip device based on a bilateral flow field pairing structure array and a preparation method therefor. The cell electrofusion chip device comprises a patterned ITO interdigital electrode layer and a flow path control module. The patterned ITO interdigital electrode layer is connected to an external cell electrofusion instrument. The patterned ITO interdigital electrode layer comprises a substrate layer, an ITO electrode layer, and a PDMS bilateral flow field pairing structure layer which are sequentially arranged. The PDMS bilateral flow field pairing structure layer comprises a bilateral flow field pairing structure and a channel, and the bilateral flow field pairing structure and the channel are symmetrically arranged. According to the present invention, efficient electrofusion of cells can be realized.
In-orbit storage of a zinc-silver storage battery for space. A storage method comprises: controlling the mass ratio of silver oxide, which is the positive electrode active material of a zinc-silver storage battery, to zinc, which is the negative electrode active material of the zinc-silver storage battery, to be 1 : 1; and controlling the discharge rate of the zinc-silver storage battery to be greater than or equal to 0.1 C and controlling the discharge cut-off voltage of the battery to be greater than or equal to 1.45 V, such that the remaining discharge capacity is controlled to be greater than or equal to 10％ of the rated capacity. In the present invention, the ratio of the positive electrode active material to the negative electrode active material and the remaining discharge capacity are controlled, such that reliable in-orbit use of a zinc-silver battery cell can be realized, and the battery cell in a discharge state can be put aside for 12 months.
An adjustment method of moisture content and dense state for a hydrogel improved subgrade based on weather-resistance during an in-service period, including: step 1: carrying out surface cleaning and compaction of ground; step 2: preparing hydrogel improved subgrade raw material; step 3: paving the prepared material on the surface to form first-layer improved subgrade; and step 4: paving plain soil subgrade onto the first-layer. The method combines the water absorption and release function of the modified resin and the characteristic of the gel state thereof, to pave the improved subgrade in layers, which can absorb water and slightly expand when the water content in the subgrade is increased to a certain threshold value, and a strength and compactness protective layer can also be formed at the connection sections of the ground and the subgrade, and the subgrade and the pavement, to prevent the pot-cover effect from occurring.
E01C 19/00 - Machines, tools, or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
45.
METHOD FOR TESTING AND EVALUATING SHORT-CIRCUIT WITHSTAND CAPABILITY OF PRESS-PACK POWER COMPONENT
Disclosed is a method for testing and evaluating a short-circuit withstand capability of a press-pack power component. The method includes: building a test platform; obtaining a voltage level, a pressure load, an environment temperature, and a maximum junction temperature fluctuation range of a to-be-tested component in an actual working condition; separately testing short-circuit withstand capabilities of the to-be-tested press-pack power component; monitoring, in real time, changes of a component short-circuit current, a collector-emitter voltage, and a grid-emitter voltage until the to-be-tested press-pack power component fails due to short circuit; correspondingly obtaining a relationship between a voltage and each of a short-circuit critical energy and a critical temperature, a relationship between a pressure and a short-circuit current, and a relationship between a temperature and a short-circuit current; obtaining a relationship between a short-circuit withstand capability of the to-be-tested press-pack power component and each of a voltage, a pressure, and a temperature.
Disclosed is a roller taper grinding method for a planetary roller screw mechanism. The method includes steps as follows: step 1: determining basic parameters and a bearing capacity of a planetary roller screw mechanism to be machined; step 2: establishing deformation and force balance equations of the planetary roller screw mechanism according to the basic parameters and the bearing capacity of the planetary roller screw mechanism determined in step 1; step 3: iteratively computing an optimal grinding taper angle of roller grinding according to the deformation and force balance equations established in step 2; step 4: determining process parameters of roller grinding; and step 5: grinding a roller taper of the planetary roller screw mechanism by a machine tool according to the process parameters determined in step 4.
B24B 5/24 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding conical surfaces
47.
MULTI-SERVO CHANNEL-BASED ROADBED FOUNDATION DYNAMIC STRESS LOADING SYSTEM AND CONTROL METHOD
The present invention relates to the technical field of simulation systems, and in particular, to a multi-servo channel-based roadbed foundation dynamic stress loading system and a method. The loading system comprises: a connecting plate; a connecting frame, wherein five dynamic actuators are hingedly connected between the connecting frame and the connecting plate, four dynamic actuators form a 4-RPR parallel mechanism, and the remaining dynamic actuator is arranged at the middle of the 4-RPR parallel mechanism; a loading part, mounted in the center below the connecting frame; a constraint plate, arranged below the loading part and being in free contact with the loading part, wherein four static actuators are arranged between the constraint plate and the connecting plate, and the static actuators and the dynamic actuators are subjected to static and dynamic collaborative control by means of multiple servo channels so as to simulate a soil mass principal stress axis rotation effect of the roadbed foundation. The present invention provides the multi-servo channel-based roadbed foundation dynamic stress loading system, and the system can implement a principal stress axis rotation effect in the roadbed foundation by means of dynamic and static collaborative loading, and can simulate different traffic load forms.
333 into the suspension to perform a sufficient oxidation reaction to then obtain a reaction solution comprising an AgO precipitate, separating out the AgO precipitate from the reaction solution, and then drying to obtain a powdery high specific capacity AgO positive electrode material.
A method for detecting a topological structure of a grounding grid under extremely cold condition, includes the following steps: in a substation in an extremely cold area, determining a measuring area S on a ground surface of a grounding grid according to the positions of branches and nodes of the grounding grid in a selected area, acquiring dynamic current values of the branches and nodes through a current sensor based on TMR tunnel magnetoresistance, and then indirectly acquiring the magnetic induction intensity of the measuring area S through conversion; calculating moduli of first to third derivatives of magnetic induction intensities; and determining specific positions and laying depths of the branches of the grounding grid according to peak distances between main lobe peaks and side peaks between strong peaks of the moduli. According to the method, the calculation amount is greatly reduced, and the detection method has strong anti-interference.
G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
50.
ZINC-SILVER STORAGE BATTERY USED FOR MULTIPLE TIMES IN MICROGRAVITY ENVIRONMENT
A zinc-silver storage battery used for multiple times in a microgravity environment, comprising a housing, a positive electrode, a negative electrode and an electrolyte which are located in the housing, and a separator that separates the positive electrode from the negative electrode. Positive and negative current collectors respectively extend out of the housing from the positive and negative electrodes and are respectively sleeved with positive and negative electrode insulating sleeves. The upper edges of the positive electrode and the negative electrode are both coated by insulating films. In the present invention, the upper edges of the positive and negative electrodes of the battery are coated in an insulating manner, and the positive and negative electrode current collectors are coated with the insulating sleeves, so that the situation that the sponge zinc separated out in multiple charging processes of the battery in a microgravity environment floats upwards to form a "zinc bridge", and is communicated with the positive and negative electrodes to cause internal short-circuit failure of the battery is effectively avoided.
The present invention relates to the field of roadbed dynamic response model testing; provided are a cumulative roadbed deformation simulation test system and a method, having full service environment and traffic load action, and directed at the problem of difficulty in carrying out qualitative and quantitative research on cumulative deformation of a roadbed. By means of configuring a roadbed base model, a full service environment simulation test box, an excitation system and a monitoring system, simulation experiments are performed on the cumulative deformation of a roadbed under the action of a full service environment of freezing, thawing, dryness and wetness, rainfall, and groundwater levels, and traffic loads, so as to achieve reproduction of dynamic stress of the roadbed under different traffic loads and coupling simulation of the full service environment with traffic loads, thereby meeting the requirements for cumulative roadbed deformation research.
The present invention relates to the field of traffic engineering. Disclosed are a subgrade and foundation dynamic response simulation device and method capable of realizing rotation of a principal axis of stress. The device comprises a constraint plate for coming into contact with a subgrade, wherein a loading plate is arranged at the center of the constraint plate; a loading device is mounted on the loading plate; a plurality of dynamic actuators are uniformly distributed in the circumferential direction of the loading device; the center of the loading device is connected to one dynamic actuator; each dynamic actuator is connected to a connecting plate above the constraint plate; a plurality of static hydraulic cylinders are connected between the constraint plate and the connecting plate; the static hydraulic cylinders and the dynamic actuators in the circumferential direction of the loading device are distributed in a staggered manner; and the static hydraulic cylinders and the dynamic actuators perform static-dynamic cooperative control so as to simulate a rotation effect of a principal axis of stress in subgrade and foundation soil. The present invention can truly and accurately simulate a subgrade and foundation dynamic response that takes into consideration the rotation effect of the principal axis of stress, can simulate various traffic load forms, and thus has a wide range of applications.
G01N 3/36 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
53.
METHOD, SYSTEM, ELECTRONIC DEVICE AND STORAGE MEDIUM FOR CONSTRUCTING LOCAL CONVEX FEASIBLE SPACE
A method, system, electronic device and storage medium for constructing locally convex feasible space are provided. The method includes acquiring a plurality of initial motion trajectory points, size information and surrounding obstacle information of a target vehicle; generating a quadtree map according to the above information; determining a target distance corresponding to each initial motion trajectory point according to the quadtree map; allocating locally convex feasible space to a first-type initial motion trajectory point by using the quadtree map, and allocating locally convex feasible space to a second-type initial motion trajectory point by using an improved convex feasible set algorithm. The first-type initial motion trajectory point is an initial motion trajectory point with the target distance greater than or equal to a set threshold; and the second-type initial motion trajectory point is an initial motion trajectory point with the target distance less than the set threshold.
A method and system for decomposing cross-domain path planning of an amphibious vehicle. The method includes: defining a starting point and a target point of cross-domain path planning by acquiring an amphibious map containing coastline information, constructing a candidate set of land-water transition points; setting a multilevel gradient search range on a coastline and a set number of iterations; determining a locally-optimal land-water transition point in each search range in a level-wise search mode; setting a heuristic search termination condition, and determining, based on the heuristic search termination condition, whether a current locally-optimal land-water transition point can be globally optimal; if yes, stopping searching, and determining a globally-optimal land-water transition point; if no, determining whether the range is completely traversed; if yes, stopping searching, and determining a globally-optimal land-water transition point; if no, continuing to traverse the range; finally performing global path planning based on the globally-optimal land-water transition point.
A stormwater runoff treatment substrate includes a lower pyrite substrate layer and an upper biochar substrate layer. The lower pyrite substrate layer includes pyrite, oyster shell powder, and sandy materials in a volume ratio of 10:5:85. The upper biochar substrate layer includes biochar or activated carbon, organic nutrient soil, and sandy materials in a volume ratio of 20:3:77.
ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF GUANGXI POWER GRID CO., LTD. (China)
CHONGQING UNIVERSITY (China)
Inventor
Wu, Xiaorui
Sun, Yue
Li, Xiaofei
Xiao, Jing
Chen, Shaonan
Zuo, Yue
Mo, Yuhong
Wu, Ning
Gong, Wenlan
Han, Shuai
Chen, Weidong
Guo, Min
Guo, Xiaoxuan
Tang, Chunsen
Abstract
The present disclosure relates to the field of EV-DWPT (electric vehicle dynamic wireless power transfer), and specifically discloses a double solenoid EV-DWPT system and a parameter optimization method thereof. The system is provided with a magnetic coupling mechanism, comprising a transmitting structure and a receiving structure. The transmitting structure includes a plurality of double solenoid transmitting rails arranged equidistantly along a road direction. Each double solenoid transmitting rail includes a square tubular magnetic core perpendicular to the road surface, and transmitting solenoids wound spirally using one and the same Litz wire wound in opposite directions. The present disclosure proposes a magnetic coupling mechanism with a double solenoid structure, provides a specific parameter optimization design method, completes the analysis of the system power transmission topology and the electrical parameter design, greatly reduces power fluctuations of the system rail switching domain, and improves the system's anti-offset capability.
B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
57.
PULSE DISCHARGE SYSTEM APPLIED TO POSITIVE ELECTRODE CURRENT COLLECTOR OF VAPORIZED LITHIUM-ION BATTERY
The present invention provides a pulse discharge system applied to a positive electrode current collector of a vaporized lithium-ion battery, the system comprising M coaxial cables, and further comprising a pulse discharge module, a coaxial cable fixing device used for fixing the M coaxial cables, and M clamping devices used for clamping the positive electrode current collector of the lithium-ion battery. The present invention uses physical means to vaporize an aluminum foil in the positive electrode current collector of the lithium-ion battery so as to separate same, and the process is simple and the effect is quick.
An infrared thermal imaging defect inspection method and apparatus for a substation insulator. The apparatus comprises: an infrared module and a core computing module, wherein the infrared module is bidirectionally connected to the core computing module, and the infrared module is further unidirectionally connected to a high-rate battery; the core computing module is unidirectionally connected to a touch-control screen; and the infrared module is used for acquiring infrared radiation information by means of a lens, and performing computation to generate a temperature distribution video. The method comprises: collecting an infrared video, performing segmentation to obtain a hot zone, determining a device type, extracting key temperature information, performing defect diagnosis, displaying a result, and saving the result. The method solves the technical problems of defect determination and classification backup methods in the prior art having high repetitions, requiring a lot of manpower, having high requirements for the professionalism and work experience of inspectors for a defect type having a small heating temperature difference, having certain subjectivity in respect of a diagnosis result, having relatively poor real-time performance of diagnostic analysis, etc.
G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
G01J 5/48 - ThermographyTechniques using wholly visual means
G01R 31/12 - Testing dielectric strength or breakdown voltage
G06N 3/04 - Architecture, e.g. interconnection topology
G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks
59.
GROUNDING GRID TOPOLOGICAL STRUCTURE MEASUREMENT METHOD UNDER EXTREMELY COLD CONDITIONS
Bzz x, yByy x, yBzz z (1)x, yBzz z (3)x, yBzz x, yByy y (2)x, yByy x, yx, y) in the direction parallel to the ground surface; and, according to the peak distance between the main lobe peak value and the side peak between main peaks of the modulus of each derivative, determining the specific position and the laying depth of the grounding grid branch in the measurement area S. The present method greatly reduces the amount of calculation and the measurement mode has strong anti-interference performance.
ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF GUANGXI POWER GRID CO., LTD (China)
CHONGQINGUNIVERSITY (China)
Inventor
Wu, Xiaorui
Sun, Yue
Li, Xiaofei
Xiao, Jing
Chen, Shaonan
Zuo, Yue
Zhou, Yuanzhao
Mo, Yuhong
Wu, Ning
Gong, Wenlan
Han, Shuai
Chen, Weidong
Guo, Min
Guo, Xiaoxuan
Tang, Chunsen
Abstract
The present invention relates to the technical field of EV-DWPT (electrical vehicle dynamic wireless power transfer). Specifically disclosed are a double-solenoid type EV-DWPT system and a parameter optimization method therefor. The system is provided with a magnetic coupling mechanism; the magnetic coupling mechanism comprises a transmitting structure and a receiving structure; the transmitting structure comprises a plurality of double-solenoid type transmitting guide rails arranged along a road direction at equal intervals; each double-solenoid type transmitting guide rail comprises a square tubular magnetic core perpendicular to the road surface, and an inner energy transmitting solenoid and an outer energy transmitting solenoid respectively spirally wound on the inner wall and the outer wall of the square tubular magnetic core; and the inner energy transmitting solenoid and the outer energy transmitting solenoid are wound using the same Litz wire but are wound in the opposite direction. The present invention provides the magnetic coupling mechanism of a double-solenoid structure, and provides a specific parameter optimization design method, completes the analysis of power transfer topology and electrical parameter design for a system, greatly reducing the power fluctuation of a guide rail switching area of the system, and improves the anti-offset capability of the system.
The present disclosure discloses an intelligent control and monitoring system for bolt fastening load and a use method thereof. The system includes a bolt-washer combination; a fastening detection terminal configured to monitor tightness of a bolt, upload loosening risk information, and send onsite assembly information and onsite mounting information of the bolt; a smart electric wrench configured to pre-fasten the bolt based on the onsite assembly information of the bolt, and transmit the mounting information of the bolt; and a cloud platform configured to plan, take statistics, and store the mounting information of the bolt, confirm and monitor the mounting information of the bolt. According to the present disclosure, pre-fastening force to the bolt is more accurately controlled, a function of matching an IP address with a physical mounting address is provided, so that physical positioning can be quickly performed for a mounted fastening detection element.
B25B 23/147 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
B25B 21/00 - Portable power-driven screw or nut setting or loosening toolsAttachments for drilling apparatus serving the same purpose
62.
Pavement nondestructive detection and identification method based on small samples
Provided is a pavement nondestructive detection and identification method based on small samples, including: constructing an original dataset, dividing the original dataset into several patch blocks, sampling the patch blocks, and obtaining samples of the patch blocks; inputting the samples of the patch blocks into a Transformer model for feature extraction and target reconstruction, and obtaining a trained Transformer model; and based on the trained Transformer model, detecting input pavement sample images.
An in-situ detection component for dissolved gases in liquid-phase media and preparation method of the in-situ detection component, the detection component is a drilled hollow-core light guiding device (5) coated with a liquid-gas separation membrane (4) on the outer surface. The liquid-gas separation membrane (4) directly filters the gases dissolved in liquid-phase media into the drilled hollow-core light guiding device (5), where the laser interacts with the gases and generates the response signals that are transmitted through the hollow-core light guiding device (5), to realize the simultaneous dissolved gas separation and detection. The aboved detection component substantially reduces the time required for liquid-gas separation process in detection components, allowing for fast and accurate in-situ detection of dissolved gases, and integration of liquid-gas separation and detection procedures.
China Construction Industrial & Energy Engineering Group Co., Ltd. (China)
Inventor
Chai, Hongxiang
Wang, Xinyue
Shao, Zhiyu
Ma, Haiyuan
Hu, Jingjing
He, Qiang
Xu, Yanhong
Ni, Qichang
Liu, Fujian
Abstract
A bioretention pond includes a pond body and an overflow weir. The pond body includes a pond wall and a layered substrate. The layered substrate includes from bottom to top: a gravel layer, a transition layer, a pyrite layer, a plant layer, a pebble water layer, an organic layer, and a water storage layer. The overflow weir is disposed on the pebble water layer with a space left above the center of the pebble layer. The organic layer is disposed in the space and covers the pebble layer. The water storage layer is disposed onto the organic layer. The pond body further includes a perforated pipe disposed in the gravel layer; and the perforated pipe includes an outlet end disposed at the top part of the pyrite layer.
A testing device for simulating coalbump includes a testing chamber. A first oil cylinder, a second oil cylinder and a third oil cylinder are provided within the testing chamber; each piston rod of each oil cylinder can stretch or retract. A first reaction seat, a second reaction seat and a third reaction seat are arranged opposite to a side of the first piston rod of the first oil cylinder, a side of the second piston rod of the second oil cylinder and a side of the third piston rod of the third oil cylinder respectively. The testing device includes a shear loading unit including a fourth oil cylinder and a fifth oil cylinder located on a same axis, and a side of a fourth piston rod of the fourth oil cylinder and a side of a fifth piston rod of the fifth oil cylinder are arranged opposite to each other.
A high strength cast magnesium alloy, relating to the technical field of magnesium alloy material preparation. The composition and mass percentage of cast magnesium alloy are: Zn 7.0%, Al 3.0%˜5.0%, Mn 0.3%˜0.5%, RE 0.5%˜1%, the total amount of unavoidable impurities is less than or equal to 0.04%, and the allowance is Mg, wherein the RE includes La and Ce, La and Ce account for 35% and 65% of the total amount of RE, respectively. Among them, Mn, La and Ce are added in the form of Mg-5 wt. % Mn, Mg-30 wt. % La and Mg-30 wt. % Ce intermediate alloys respectively. Then it is prepared through battering, melting, melt purification, pouring and heat treatment. By adding RE, the alloy melt can be purified, and the corrosion resistance and casting performance of the alloy can be increased. The tensile strength of the alloy is 300 MPa˜314 MPa, the elongation is 7%-13%, and the light rare earth content is low, the raw material and processing cost is low, and it is easy to realize mass production.
C22C 23/04 - Alloys based on magnesium with zinc or cadmium as the next major constituent
C22C 1/03 - Making non-ferrous alloys by melting using master alloys
B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
C22B 9/10 - General processes of refining or remelting of metalsApparatus for electroslag or arc remelting of metals with refining or fluxing agentsUse of materials therefor
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
67.
METHOD AND SYSTEM FOR DETECTING DIRT ON ELECTRODE OF ELECTROMAGNETIC FLOWMETER
A method and system for detecting dirt on an electrode of an electromagnetic flowmeter are provided. The method includes: under three different conditions acquiring resistance values between the electrode and ground to form a first dataset, second datasets, and a sample set to be tested; extracting a positive definite feature matrix corresponding to each sample batch and calculating a Riemann center thereof; calculating a similarity index between the sample feature matrix and each of the first feature matrices and the second feature matrices; extracting l feature matrices with a largest similarity index, and calculating a local Riemann center thereof; and calculating proximity between the local Riemann center and each of the second Riemann centers, and determining that a Riemann center with the greatest proximity corresponds to dirt on the electrode corresponding to the sample set to be tested. The method can achieve a online rapid detection of dirt on the electrode.
Disclosed is an integrated method for mineralizing and sequestrating carbon dioxide and filling goaf with fly ash, which relates to the engineering field of combination of fly ash and carbon dioxide recycling. The method includes: S1, selecting an area conducive to sequestration of the carbon dioxide; S2, building a stope overburden pressure calculation model in the selected area, to determine a key stratum of a stope and calculate a limit caving interval of an overlying stratum of the stope; S3, mining a coal seam of the stope, and filling the goaf, manufactured by mining the coal seam, with gangue in the coal seam; S4, fully stirring, by a stirring apparatus, the fly ash to form loose fly ash, outputting the loose fly ash to the goaf for filling, and determining an effective flow radius of the carbon dioxide by means of a built carbon dioxide seepage model; and S5, reasonably setting an interval of a vertical drilling well according to the effective flow radius of the carbon dioxide. The present disclosure provides an excellent environment for stacking waste fly ash and sequestrating carbon dioxide.
E21F 15/00 - Methods or devices for placing filling-up materials in underground workings
G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
69.
Terminal force soft-sensing method of hydraulic manipulator
The embodiments of the present disclosure provide a terminal force soft-sensing method of a hydraulic manipulator. The method includes: establishing a dynamic model of the hydraulic manipulator, performing linearization processing on the dynamic model, and establishing a minimum inertial parameter set of the hydraulic manipulator and a linear model of a regression matrix corresponding to the minimum inertial parameter set; generating an excitation trajectory by solving a finite Fourier series coefficient; determining a hydraulic driving torque by collected values of pressure sensors of two chambers of hydraulic cylinders when controlling the hydraulic manipulator to operate the excitation trajectory under a no-load condition; determining a total regression matrix by bringing joint angles, joint angular velocities, and joint angular accelerations at each moment into the regression matrix; and determining dynamic parameters of the hydraulic manipulator based on the hydraulic driving torque and the regression matrix.
The present disclosure provides a method and system for path planning of an unmanned vehicle in a three-dimensional terrain and relates to the technical field of path planning. The method includes building a random tree with an initial point of a to-be-planned path as a node; generating a random node based on a goal bias strategy and a multi-sampling strategy; determining a node in the random tree and with a minimum two-dimensional distance from the random node as a nearest node; determining a direction from the nearest node to the random node as an extension direction; determining a point corresponding to a preset step length as a to-be-determined node in the extension direction with the nearest node as a starting point; and updating the random tree or determining a path cut-off random tree through elevation detection and path search cut-off detection, so as to determine the to-be-planned path.
SICHUAN XINLIN NEW MATERIAL TECHNOLOGY CO., LTD (China)
Inventor
Dong, Wenxin
Pu, Xiaolin
Fan, Jinyang
Liu, Wenhao
Chen, Siyi
Wang, Hanyi
Jiang, Deyi
Cao, Yi
Chen, Jianjun
Ge, Yao
Sun, Jinsheng
Chen, Wei
Han, Tao
Xiao, Jingwen
Abstract
The present invention relates to the technical field of functional materials, and a nano self-locking bentonite film-forming agent, a preparation method therefor and a film-forming drilling fluid. The method comprises: (1) subjecting bentonite and an acid to chemical cleavage; (2) bringing the cleaved nano bentonite in contact with an aqueous sodium chloride solution and a long-chain polymer material; (3) mixing the resulting low-dimensional nano self-locking bentonite, nano bentonite and water, and then adding a structural bonding agent dropwise; (4) introducing a trichloromethane solution, a 2,2'-bipyridine matching solution, and a p-xylene solution, and then adding an N,N,N',N",N"-pentamethyldiethylenetriamine cross-linking agent to carry out a constant-temperature free reaction; and (5) carrying out cleaning, centrifugation and drying treatment by using a mixed solution of trichloromethane and methanol to obtain a nano self-locking bentonite film-forming agent. The film-forming agent forms an effective isolation barrier in microscopic pores inside and outside a target rock stratum to prevent external moisture from invading the inside of the rock stratum.
Disclosed is an active control Stewart vibration damping platform, including a load-bearing platform, a base, and six telescopic rods. Each telescopic rod includes a driving motor, a rotating shaft, a sleeve, and a moving rod. One end, away from the driving motor, of the rotating shaft is provided with a cylindrical cavity, one end of the moving rod penetrates through the cylindrical cavity, and the sleeve is sleeved outside the rotating shaft. The rotating shaft is in running fit with the sleeve through a first bearing, and the moving rod is in sliding fit with the sleeve through a second bearing. The moving rod and the rotating shaft are respectively provided with a spiral permanent magnet. The spiral permanent magnet on the rotating shaft can drive the moving rod to move in an axial direction of the rotating shaft through the spiral permanent magnet on the moving rod when rotating.
A method for synchronous production of manganese tetraoxide and ferric oxide for a soft magnetic material by using marine polymetallic nodules includes: 1) crushing and grinding marine manganese nodules and baking to a constant weight; thoroughly mixing with a mixed flux and roasting in a muffle furnace; 2) carrying out solid-liquid separation, washing solid-phase precipitates with water, grinding the solid, adding sulfuric acid, controlling the temperature to be below 50° C., and vacuuming a reactor up; 3) adding a reducing agent to react at room temperature for 5-10 min, adding ammonia water to adjust the pH value to 5.5, and carrying out separation and filtering; 4) controlling the temperatures of manganese sulfate and ferric sulfate solutions to be below 50° C., and adding ammonium sulfide; and 5) washing with deionized water, and calcining at 800-900° C. for 1-3 s by a suspension low-temperature instantaneous firing system.
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
74.
EXPERIMENTAL SYSTEM AND EXPERIMENTAL EVALUATION METHOD FOR PULSED DISPLACEMENT AND REPLACEMENT OF METHANE WITH CARBON DIOXIDE
CHONGQING INSTITUTE OF GEOLOGY AND MINERAL RESOURCES (China)
Chongqing University (China)
Inventor
Lu, Yiyu
Lu, Zhaohui
Zhou, Jiankun
Tang, Jiren
Jia, Yunzhong
Abstract
An experimental system for a pulsed displacement and replacement of methane with carbon dioxide is provided. The experimental system includes a gas supply system, a pulse control system, a reservoir environment simulation system, a data acquisition and processing system and a tail gas recovery system, connected in sequence; and the carbon dioxide output from the gas supply system is converted into a pulsed gas through the pulse control system, the pulsed gas enters the reservoir environment simulation system to shorten a time of displacing and replacing methane with carbon dioxide, the experimental data of the reservoir environment simulation system is recorded in real time, analyzed and processed by the data acquisition and processing system, a dynamic displacement process is reflected in real time, and a relationship between a displacement evaluation indicator and a displacement time is clarified. The disclosure further provides an experimental evaluation method, using the above experimental system.
This disclosure provides a design method for a radiator of a vehicle power module. The design method includes: selecting a plurality of specific values from the possible value ranges of the first distance D1, the second distance D2 and the radius R, respectively, to form different combinations of the plurality of specific values, performing simulation calculations on the different combinations, and obtaining a temperature rise ΔTj and a pressure drop ΔPf corresponding to each combination to form a plurality of samples; through a response surface method, fitting explicit functions of the temperature rise ΔTj and the pressure drop ΔPf with the first distance D1, the second distance D2 and the radius R as dependent variables; and through a multi-objective optimization, determining the first distance D1, the second distance D2 and the radius R with an optimization objective that the temperature rise ΔTj and the pressure drop ΔPf are simultaneously minimized.
A hole protection system and a method for coal seam slotting and fracturing combined drainage. The system includes a hydraulic slotting subsystem, a hydraulic fracturing subsystem and a flexible hole protection system. The hydraulic slotting subsystem includes an ultra-high pressure water jet generating module, a drill pipe drilling tool module, an orifice sealer, a gas slag separator and a drilling rig. The hydraulic fracturing system includes an emulsion pump station, a water tank, a hole sealing device, a fracturing string and a casing. The flexible hole protection system includes a front end fixing device, a water injection support pipe, a first flexible support and a water injection connecting section.
The present invention relates to the technical field of polymer materials, and in particular to a shape memory polyurethane material and a self-reinforced regular porous polymer film prepared from same. The shape memory polyurethane in the present invention is formed by polymerizing diisocyanate, a soft segment polymer, and (aa); the soft segment polymer is polylactic acid, polyglycolic acid, polycaprolactone, polypolyol or a copolymer of at least two of same. The shape memory polyurethane material is combined with a water droplet template method to form a porous polymer film containing a crystal structure. The porous film material has excellent mechanical properties, can meet the performance requirements of application scenes such as artificial periosteum and anti-adhesive membranes, and has good application prospects.
C08J 9/28 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
Disclosed in embodiments of the present application are a picture processing method and a computer device, applicable to the field of computer file management, and specifically applicable to a picture file compression scenario. The method comprises: encoding a first picture file into a second picture file that requires a smaller storage space; and generating a pseudo file according to the file name and format of the first picture file, and establishing a correspondence between the pseudo file and the second picture file obtained by encoding, such that a system can position the second picture file by means of the pseudo file, wherein the pseudo file and the second picture file are used for replacing the first picture file, and are stored in a memory. According to the method, the storage space for pictures can be reduced while the ecological compatibility is ensured, and little space of an application is occupied and the use of a user will not be affected.
H04M 1/72409 - User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
79.
NOBLE METAL-TRANSITION METAL-BASED NANO-CATALYST THIN FILM AND PREPARATION METHOD THEREOF
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING (China)
Inventor
Nie, Baisheng
Kong, Fanbei
Liu, Xianfeng
Li, Xiangchun
Meng, Junqing
Zhu, Tao
Abstract
The present disclosure provides a noble metal-transition metal-based nano-catalyst thin film and a preparation method thereof, belonging to the fields of energy development and pollutant emission reduction. Based on a micro-nano processing technology, a noble metal-transition metal-based nano-catalyst thin film is loaded on a semi-cylindrical pipe with an inner thread structure, and heat generated is quickly accumulated on an upper surface of the catalyst to establish a large temperature gradient. By the insulation and high roughness of an alumina carrier layer and the inner thread structure of the pipe, a catalyst loading area is maximized and dispersion of noble metal atoms is enhanced. A transition metal-transition metal oxide thin film protects a noble metal nano-catalyst by core-shell wrapping, and a transition metal oxide prevents catalyst deactivation caused by oxygen occupying too many metal active sites.
B01J 37/34 - Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves
B01J 37/02 - Impregnation, coating or precipitation
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
Provided is a hollow field shaper used for a flat multi-turn coil, comprising a conical top end connection plate (1), a round hole being formed in the center of the top end connection plate (1), a slit being arranged in the center of the top end connection plate (1) along an outwards-extending radius, and the top end connection plate (1) being of an internally-closed hollow structure. According to the hollow field shaper, parts in a traditional solid pure-copper field shaper which do not participate in electromagnetic reaction are removed, such that materials are greatly saved and resources are effectively saved.
B23K 13/01 - Welding by high-frequency current heating by induction heating
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
81.
METHOD FOR GROWING LONG-SEED DKDP CRYSTAL BY TWO-DIMENSIONAL MOTION
Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences (China)
Chongqing University (China)
Inventor
Chen, Duanyang
Li, Mingwel
Qi, Hongji
Shao, Jianda
Wang, Bin
Liu, Hang
Yin, Huawei
Zhou, Chuan
Abstract
A method for growing long-seed DKDP crystal by two-dimensional motion grows the crystal along the cylindrical surface, and there is no cylinder-cone interface with low optical quality, while avoiding three flow regions which are inevitable in the crystal growth process by rotating crystal method, including incident flow, side flow and wake flow, and easily cause inclusion formation. The long seed crystal moves periodically in the fresh solution, four cylindrical surfaces can achieve reversible shear flow in one cycle, and any point on the cylindrical surface experiences the same hydrodynamic conditions in one movement cycle, so that the solute supply is sufficient and uniform, the growth velocity is improved, and the stability of morphology is ensured. The method facilitates rapid growth of high quality DKDP crystals and provides a better solution for the large-size, high-quality DKDP crystal growth required by the ICF laser device.
A method includes the steps of arranging mark points for image recognition on a plane of a test piece to be measured; recognizing and recording positions of two-dimensional Cartesian coordinates of each mark point of the test piece to be measured before and after each stretching; and determining a deformation gradient of each mark point and deformation measurement parameters of each mark point through a numerical method, where the deformation measurement parameters include a deformation gradient matrix, an elongation tensor matrix, a finite strain tensor matrix, an orthogonal tensor matrix, an angular tensor matrix, a rotation angle, and a curvature. According to the method, objective measurement of super-large deformation of the plane relating to rotation deformation is achieved.
CHONGQING INSTITUTE OF GEOLOGY AND MINERAL RESOURCES (China)
CHONGQING UNIVERSITY (China)
Inventor
Lu, Yiyu
Lu, Zhaohui
Zhou, Jiankun
Tang, Jiren
Jia, Yunzhong
Abstract
The present invention relates to an experimental system and experimental evaluation method for displacement and replacement of methane by a carbon dioxide pulse. The experimental system comprises a gas supply system, a pulse control system, a reservoir environment simulation system, a data acquisition and processing system, and a tail gas recovery system that are connected in sequence; carbon dioxide gas outputted by the gas supply system is converted into pulse gas by means of the pulse control system; the pulse gas enters the reservoir environment simulation system to shorten the time of displacement and replacement of methane by the carbon dioxide gas; experimental data of the reservoir environment simulation system is recorded, analyzed, and processed in real time by means of the data acquisition and processing system, a dynamic displacement process is reflected in real time, and the relationship between a displacement evaluation index and the displacement time is clarified. The present invention further provides an experimental evaluation method using the experimental system. According to the present invention, the problems that in an existing apparatus for displacement and replacement of methane by carbon dioxide, the displacement and replacement time is long, and the relationship between the displacement evaluation index and the displacement time cannot be clarified due to the fact that the dynamic displacement process cannot be reflected in real time are solved.
The present invention relates to the field of mechanical engineering, and in particular, to a friction kinematic pair equivalent model and a building method therefor. Friction test data of a friction pair are subjected to statistical analysis modeling and superposition according to high and low frequency bands, and an equivalent model capable of reflecting both high and low frequency characteristics of the friction pair is constructed. For low frequency band friction characteristics of the friction pair, positive pressure input information is introduced, and a traditional LuGre model is deformed to obtain implicit relationships between a friction response and a relative speed of the friction pair and positive pressure input. For high frequency band friction characteristics of the friction pair, positive pressure input information is introduced in combination with friction self-power spectrum hypothesis in a power function form to obtain an implicit relationship between the friction response and a positive pressure of the friction pair. The equivalent model provided in the present invention can reflect relationships between the friction and the positive pressure and the relative speed, and can express friction characteristics of a wide frequency band, and has good applicability.
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
G06N 3/12 - Computing arrangements based on biological models using genetic models
G06F 111/06 - Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
G06F 119/14 - Force analysis or force optimisation, e.g. static or dynamic forces
85.
RAPID PREDICTION METHOD FOR VIBRATION RESPONSE OF LOCAL NONLINEAR SYSTEM
A rapid prediction method for vibration response of a local nonlinear system, relating to the field of mechanical engineering, and comprising: dividing an entire system into a main linear system part and local nonlinear links, processing each local nonlinear link into an equivalent model, so as to express a nonlinear mapping relationship between local friction force or impact force and friction motion or impact motion, and achieve rapid and accurate prediction of friction force or impact force in each local nonlinear link, thereby achieving rapid prediction of forced vibration response of the entire system by means of combined calculation. Compared with abnormal sound vibration analysis or abnormal sound risk evaluation technology (such as SAR-Line and E-Line) in the prior art, the method considers the actual effect of an abnormal sound source or a friction pair and an impact pair, so that the basis for estimation of the structural abnormal sound risk caused by the abnormal sound source or the friction pair under external excitation is more sufficient, and the precision of structural vibration response prediction is higher.
A PT primary voltage reconstruction method based on an inverse black box model and an inverse electromagnetic duality model, comprising: acquiring a secondary voltage signal of a power system by means of a PT and dividing the secondary voltage signal into a low-frequency voltage component and a high-frequency voltage component (S1); performing, by using an inverse black box model, primary voltage reconstruction on the high-frequency voltage component so as to obtain a primary voltage high-frequency voltage component (S2); performing, by using an inverse electromagnetic duality model, primary voltage reconstruction on the low-frequency voltage component so as to obtain a primary voltage low-frequency voltage component (S3); and integrating the primary voltage high-frequency voltage component and the primary voltage low-frequency voltage component to obtain a primary voltage of the power system (S4). According to the method, the high-frequency voltage component and the low-frequency voltage component which are divided from the secondary voltage signal acquired by the PT are respectively processed by using the inverse black box model and the inverse electromagnetic duality model to obtain the primary voltage high-frequency voltage component and the primary voltage low-frequency voltage component, which are added to obtain the primary voltage, so that the obtained primary voltage is not influenced by distortion in a PT acquisition process, and the data accuracy is high.
A modeling method for a continuous elastic body impact kinematic pair equivalent model, comprising: establishing an equivalent model for an impact kinematic pair in a continuous elastic body mechanical structure; representing the contact mechanical properties of an impact pair material by using a Hertzian contact model; and representing the mechanical impedance properties of a continuous elastic body at an impact contact point by using an origin transfer function or a pulse response function, so that an impact force pulse response of the continuous body impact kinematic pair at a given impact initial speed is determined.
Disclosed are a cooling water-saving device for a cooling tower, and a wet cooling tower. The cooling water-saving device includes indirect heat exchange devices and a water collecting tank. The inner wall of a cooling tower shell is sealed by the water collecting tank. The indirect heat exchange device includes a heat exchange channel and a heat insulation channel. The heat insulation channel penetrates through the bottom of the water collecting tank, and the bottom inlet of the heat insulation channel communicates with air entering from the bottom of the cooling tower shell. The heat exchange channel for shielding water drops is arranged at the top outlet of the heat insulation channel, and the top of the heat exchange channel extends into an air outlet in the upper part of the cooling tower shell. The lower outlet of the heat exchange channel communicates with a rain area.
The present disclosure provides a hydrogen evolution electrode and a preparation method thereof. The preparation method includes the following steps: providing an electrolyte including Co(NO3)2·6H2O with a Co(NO3)2 concentration of 0.005 mol L−1 to 0.015 mol L−1, MnCl2·4H2O with a MnCl2 concentration of 0.005 mol L−1 to 0.01 mol L−1, KCl with a concentration of 0.003 mol L−1 to 0.008 mol L−1, and CH3CSNH2 with a concentration of 0.04 mol L−1 to 0.06 mol L−1; adjusting the electrolyte to a pH value of 6 to 7; providing a cathode in the form of a substrate; and conducting electrolysis in a cyclic voltammetry mode, thereby preparing the electrode for hydrogen production by water electrolysis through electrochemical deposition of a Co9-xMnxS8 nanosheet catalyst on the cathode substrate, where 1≤X≤7.
C25B 11/075 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of a single catalytic element or catalytic compound
Disclosed are a method and a device for obtaining a safe interval of a human body parameter in a built environment, a terminal device, and a storage medium. The method includes: obtaining a first facial image, a benchmark human body parameter, and a human body posture analysis result of a target user in a target built environment; inputting the first facial image into an emotion analysis model to obtain an emotion analysis result; and obtaining the safe interval of the human body parameter of the target user according to the emotion analysis result, the human body posture analysis result, and the benchmark human body parameter.
The present disclosure relates to a dual-band antenna array with fan beam and pencil beam. The antenna comprises a substrate and an antenna array arranged on the surface of the substrate, a first antenna element and a second antenna element are cascaded in an x-axis direction by a filter phase-shift line so as to form a subarray. A pair of T-shaped monopoles are symmetrically placed along the x axis at a certain distance above and below each of the first and second antenna elements, respectively, and a rectangular slot is embedded in the upper edge of the second antenna element to achieve good impedance matching. The second antenna element generates a fan beam at one frequency point or frequency band to have the performance of a wide beam, and generates a pencil beam at another frequency point or frequency band to have the performance of a narrow beam.
Provided in the present invention are a design method for an inner tooth profile of a complex-wave oscillating-tooth speed reducer, and a two-stage speed reducer. For a time-varying pitch curve meshing form of the contour of an elliptical cam, inner tooth profiles of two stages of transmission are respectively obtained by using a B-matrix kinematic method. A meshing matrix has a uniqueness which does not change along with a change in the form of a conjugate surface, and therefore the calculation of a B matrix is unrelated to a geometric parameter of the conjugate surface, and regardless of an expression of the conjugate surface, the same B matrix can be used for calculation and analysis. Compared with a traditional oscillating-tooth profile design method based on an envelope theory, the calculation process is simplified, the design efficiency and the design precision are improved, and the complexity of subsequent machining is reduced, thereby reducing the machining cost.
Disclosed is a method for identifying secondary reservoir formation boundaries and combined extraction of multiple asymmetric mining coalbed methane. This method fully combines the displacement transfer mechanism after multiple mining to determine its influence on a horizontal thrust of overlying strata after a first mining, and then determines evolution characteristics of pressure arches. Combining the identification of different types of pressure arches with a layout of a surface well accurately determines a secondary reservoir formation range of coalbed methane. By adopting the method of mining face overlying strata in series for combined extraction, coalbed methane from multiple mine faces is extracted by one well to greatly improve the coalbed methane extraction effect.
The present invention belongs to the technical field of subgrade humidity control and drainage, and particularly relates to an intelligent subgrade humidity control and drainage device based on a modified water-absorbent resin, and a usage method therefor. Aiming to solve the problem whereby an existing subgrade cannot absorb and discharge moisture in the subgrade and is thus prone to causing disasters, the following solution is put forward: the device comprises a foundation, wherein an improved subgrade layer is laid on the top of the foundation; a pavement layer is laid on the top of the improved subgrade layer; a first drainage device is arranged between the foundation and the improved subgrade layer; a second drainage device is arranged between the improved subgrade layer and the pavement layer; the drainage device comprises the following components: a double-layer high-suction geotextile, 4-10% of a modified water-absorbent resin, a flocculent filler and a humidity-sensitive material; and the improved subgrade layer comprises the following components in percentages by weight: 0.4-1% of a polymer hydrophobic agent. The present invention is convenient to operate, and a subgrade internal drainage device capable of draining water by means of a high suction force difference is prepared in cooperation with a modified water-absorbent resin.
The present invention relates to the technical field of weather-resistant hydrogel roadbeds, and in particular to a water content and dense state regulation and control method based on a weather-resistant hydrogel roadbed operation period. For the problem that existing roadbeds are inconvenient to automatically regulate and control when there is too much or too little water, the following scheme is proposed: the method comprises the following steps: S1, cleaning and compacting the surface of a foundation; S2, preparing a hydrogel roadbed filler; S3, laying prepared hydrogel roadbed raw materials on the surface of the foundation to form a first layer of improved roadbed; and S4, laying a plurality of layers of plain soil roadbed on the surface of the improved roadbed. According to the present invention, water absorption and release functions of a modified resin and the characteristics of a gel state thereof are combined for mixed use, and the improved roadbed is laid in a layered mode, such that when the water content in the roadbed is increased to a certain threshold, the modified resin can absorb water and is slightly swelled, and a strength and compactness protection layer can also be formed on a connection section of the foundation and the roadbed and a connection section of the roadbed and a pavement, thereby preventing the pot cover effect.
The present disclosure provides a method for predicting a remaining useful life (RUL) of an aero-engine, specifically including: acquiring multidimensional degradation parameters of an aero-engine to be predicted to obtain acquired data; segmenting the acquired data by a sliding window (SW) to obtain preprocessed data; constructing a RUL prediction model of the aero-engine including a multibranch convolutional neural network (MBCNN) model, a multicellular bidirectional long short-term memory (MCBLSTM) model, a fully connected (FC) layer FC1, and a regression layer; taking the preprocessed data as input data of the MBCNN model, extracting an output of the MBCNN model, taking the output of the MBCNN model and recursive data as input data of the MCBLSTM model, and extracting an output of the MCBLSTM model; obtaining an output of the FC layer FC1, and inputting the output of the FC layer FC1 to the regression layer to predict a RUL.
Disclosed in the present invention is an end force soft measurement method for a hydraulic manipulator. First, a dynamics model of a hydraulic manipulator is built, and linearization processing is performed on the dynamics model to build a linear model of a minimum inertial parameter set of the manipulator and a corresponding regression matrix thereof; and in order to minimize the number of conditions of the regression matrix, a finite Fourier series coefficient is solved to generate an excitation trajectory. Then, under a load-free condition, the manipulator runs the excitation trajectory once, values of pressure sensors in two cavities of a hydraulic cylinder are collected, and a hydraulic drive torque τ is calculated by means of the pressure of the two cavities of the hydraulic cylinder. Joint angles, angular velocities, and angular acceleration at time points are substituted into a regression matrix Y, for combination into a total matrix. Finally, a dynamics parameter of the manipulator is calculated according to the obtained hydraulic drive torque τ and regression matrix Y. According to the end force soft measurement method provided in the present invention, an end force sensor can be replaced, so that the problem that a force sensor is prone to damage under a complex working condition and thus cannot accurately sense an end force is solved.
Embodiment of the present application provide a file deduplication method and apparatus, and a device. In the method, during file writing, in response to a write request, a file in the write request is temporarily stored in a first storage space, and the file in the write request is compared with a file in a second storage space, so that whether the file in the write request is a repeated file is determined. By means of the method, repeated files can be automatically removed during file writing, and storage space occupation is reduced; a user does not need to actively initiate a file deduplication request, so that the performance overhead is reduced.
Sichuan Xinlin New Material Technology Co., Ltd. (China)
Inventor
Dong, Wenxin
Pu, Xiaolin
Fan, Jinyang
Liu, Wenhao
Chen, Siyi
Wang, Hanyi
Jiang, Deyi
Cao, Yi
Chen, Jianjun
Ge, Yao
Sun, Jinsheng
Chen, Wei
Han, Tao
Xiao, Jingwen
Abstract
The present application discloses a nanometer self-locking bentonite film-forming agent, a method for preparing the same, and a film-forming drilling fluid.
A test piece holder for coalbed fracturing comprises a pressure chamber, first sliding rods, second sliding rods, third sliding rods, fourth sliding rods, fifth sliding rods, oil cylinders and a sealing ring, upper and lower ends of a test piece are both provided with an electrode needle and a gas-guide and liquid-guide conducting bolt, the gas-guide and liquid-guide conducting bolt has a hollow rod structure, an inside end of the gas-guide and liquid-guide conducting bolt located above is communicated with a water-gas channel and an outside end of the gas-guide and liquid-guide conducting bolt located above is a water-gas outlet, an inside end of the gas-guide and liquid-guide conducting bolt located below is communicated with the water-gas channel and an outside end of the gas-guide and liquid-guide conducting bolt located below is respectively provided with a gas inlet and a water inlet.
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 23/083 - 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 measuring the absorption the radiation being X-rays
patents
