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Excitation position determination method of three-dimensional seismic acquisition observation system
InactiveCN102313900AQuality improvementHelp designSeismic energy generationSeismic signal transmissionLocation determinationPhysics
The invention provides an excitation position determination method of a three-dimensional seismic acquisition observation system. The method comprises the following steps: exciting an target area and using a numerical simulation method of a three-dimensional elastic wave equation to calculate an illumination result of the target area; analyzing the illumination result so as to determine an excitation position and a receiving point corresponding to the excitation position, wherein an excitation source is added to the excitation position corresponding to an illumination shadow region if there is the illumination shadow region with an illumination which is lower than a predetermined value or with the non-uniform distributed illuminance. The method of the invention can help to design a goal-directed earthquake observation system so that field data quality and offset profile quality can be raised.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
Battery management system and battery management method
ActiveCN105762895AReduce modification workImprove simplicityCharge equalisation circuitIndicating/monitoring circuitsSystems designElectrical battery
The invention provides a battery management system and a battery management method. The battery management system comprises a battery pack controller, N single battery controllers, N isolation transformers and a pair of multiplex buses; the battery pack controller is connected to the multiplex buses and used for managing a battery pack, each single battery controller is connected to the multiplex buses through one isolation transformer, the battery pack comprises N single batteries which are connected in series, each single battery controller manages one single battery, time division multiplexing is performed on the multiplex buses, therefore, the battery pack controller and the single battery controllers can achieve power transmission and signal transmission through the multiplex buses, the system design and implementation difficulty is lowered, and the system is beneficial for lowering the cost. Furthermore, each single battery controller and the corresponding single battery are arranged to be adjacent to each other in the space, therefore, the single battery controllers and the single batteries can be combined together at the structure level, historical data of the batteries is stored, and secondary use of the batteries is convenient.
Owner:HANGZHOU SILAN MICROELECTRONICS +1
Escalator passenger retrograde motion detection method based on deep learning
PendingCN111144247AEasy to installEasy to deployBiometric pattern recognitionSustainable buildingsVideo streamingObject tracking algorithm
The invention discloses an escalator passenger retrograde motion detection method based on deep learning, and the method comprises the steps: 1, obtaining an image frame from a monitoring video streamof an escalator, and setting a detection region (ROI); 2, detecting the head position of the passenger in the ROI specified in the step 1 by using a target detection algorithm; 3, judging the direction of the head detected in the step 2 by using a classifier, and judging whether the passenger possibly has a retrograde phenomenon or not; 4, tracking each possible retrograde target (head) in the step 3 by using a multi-target tracking algorithm to obtain a tracking trajectory; and step 5, analyzing each track in the step 4, and judging whether the passenger has a retrograde motion behavior or not. According to the algorithm, high accuracy and real-time performance can be achieved under the complex condition, the retrograde motion behavior of passengers on the escalator can be effectively judged, and accidents are avoided.
Owner:ZHEJIANG UNIV
Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method
ActiveCN101324538AHelp optimizeHelp designMaterial impedanceElectrical resistance and conductanceMeasurement device
The invention provides a method for measuring the conductivity of the powder material. The method comprises the following steps: (a) keeping the powder material to be measured in a cylinder shape and applying a certain pressure P to the powder material until the shape of the cylinder powder body can be kept stable; (b) measuring the length L, the cross-sectional area S and the resistance R of thecylinder powder body; and (c) calculating the conductivity of powder material based on the formula that Sigma is equal to L divide (R multiply S). The invention further provides a device for measuring the conductivity, which comprises a powder container, two conductive pistons, a pressure device, and a resistance measuring device. By adopting the method and the device, the conductivity of the powder material to be measured in a pressurized state can be measured, thereby the conductivity of the powder material to be measured in an operating pressure can be quantitatively provided. The relationship of the conductivity of the powder material to be measured varying with the pressure P can be obtained through changing the pressure value of the powder material to be measured and measuring the conductivity thereof. The method facilitates the selection of the electrode material, the optimization of the electrode material formulation and the integrated design of the battery system.
Owner:SHENZHEN BAK POWER BATTERY CO LTD
Indoor pseudo-satellite signal multipath microscopic parameter analysis system based on statistical model
InactiveCN110376615AHelp designDesign optimisation/simulationSatellite radio beaconingSoftware systemSignal tracking
The invention discloses an indoor pseudo-satellite signal multipath microscopic parameter analysis system based on a statistical model. A software system comprises an indoor structured scene modelingmodule, which is used for carrying out three-dimensional scene modeling with an office area as a target research environment, and is provided with a pseudo-satellite launcher and a pseudo-satellite data collection point; a multipath signal tracking module for carrying out multi-path signal tracking by adopting an image method; a multipath signal extraction module used for extracting multipath signals based on time and power judgment; and a data derivation and statistics analysis module used for matching a deterministic model obtained by inductive statistics with a theoretical model, and verifying the correctness of a multipath microcosmic parameter theoretical model suitable for a pseudo-satellite signal system. Based on the system disclosed by the invention, channel characteristics of pseudo-satellite multipath of a multipath delay extended model, a multipath power delay model and the like in indoor environments can be revealed, and the design of a pseudo-satellite receiver and a simulator is facilitated.
Owner:SOUTHEAST UNIV
Unmanned aerial vehicle directional navigation method, GNSS receiver device and GNSS receiver system
PendingCN108535750AHigh measurement accuracyHighly integratedSatellite radio beaconingComputer moduleMarine navigation
The invention discloses an unmanned aerial vehicle directional navigation method, a GNSS receiver device and a GNSS receiver system. The system comprises the GNSS receiver device, a first GNSS satellite receiving antenna and a second GNSS satellite receiving antenna, wherein the GNSS receiver device comprises a GNSS satellite signal processing unit, a directional navigation processing unit, a positioning navigation processing unit, a differential data processing unit and a positioning and directional navigation result generating unit. Two GNSS receiving antennas are adopted to provide autonomous difference and offset common errors; through a lengthened baseline mounting mode of the two antennas on an unmanned aerial vehicle carrier, the directional navigation precision is improved; due tothe positioning difference processing, the measurement accuracy of a dual-antenna baseline vector is improved; due to the accurate directional navigation, various and optimized autonomous flight routes can be designed; the integration and the independence of the module are improved, a product can be formed easily, and the productibility is improved; and accurate course navigation for the unmannedaerial vehicle carrier can be realized, and the problem of inconsistency flight area overlapping between flight routes can be solved.
Owner:GUANGZHOU HI TARGET NAVIGATION TECH
Method for calculating thickness of end socket of fiber wound composite shell
ActiveCN110222395AHelp designImprove fidelityMeasurement devicesForecastingFiber bundleRectangular coordinates
The invention relates to a method for calculating the thickness of a shell cover of a fiber wound composite material, which comprises the following steps of: obtaining a fiber track corresponding to an actual winding line type by solving differential equations of a winding angle and a core model corner; and calculating the fiber bundle side line of the end socket section by adopting a geodesic line offset method. In consideration of the continuous change of the curvature radius of the end socket section, the fiber bundle is divided into a plurality of small sections, and then each small section approximately considers that the offset angle of the geodesic line is not changed, so that an offset point can be easily calculated on each small section until the boundary is calculated. In order to facilitate numerical calculation of the intersection point of the reference line and the fiber bundle sideline, a rectangular coordinate of the fiber bundle sideline is converted into a polar coordinate, so that the intersection point of the reference line and the fiber bundle sideline can be easily calculated by adopting a linear difference method. By adopting the method, the seal head thickness curve of the seal head in any shape under any winding linearity can be calculated, so that the influence rule of the winding linearity on the seal head thickness can be researched.
Owner:陕西道博飞科新材料技术有限公司
Ultra-high temperature pulverized coal combustion experiment device
ActiveCN103571989AEasy to operateRun smoothlyBlast furnace componentsBlast furnace detailsExhaust gasCoal
The invention discloses an ultra-high temperature pulverized coal combustion experiment device, belongs to the technical field of blast furnace ironmaking, and solves the problem of combustion ratio detection of pulverized coal under an ultra-high temperature condition. Meanwhile, the device can be applied to combustion ratio detection of novel fuels such as biomass. The device comprises a gas mixing tank, a gas preheating furnace, a gas accelerator, a pulverized coal screw feeder, a flow meter, a rapid cut-off valve, a mixing pipe, an electric arc combustion chamber, an electric arc control cabinet, a dust collector, a secondary dust remover, a gas analyzer, a computer, a data wire and a tail gas treatment device. By adopting the ultra-high temperature pulverized coal combustion experiment device, the pulverized coal can be evenly and continuously sprayed into the combustion chamber according to different flows; meanwhile, hot air is accelerated by adopting the gas accelerator; ultra-high temperature pulverized coal is generated by adopting the electric arc combustion chamber; the combustion state of the pulverized coal can be closer to the actual work condition of a blast furnace. Therefore, reasonable technological parameter and coal injection scheme are provided for efficient combustion of the pulverized coal of the blast furnace.
Owner:UNIV OF SCI & TECH BEIJING
Pancreatic cancer detection panel based on next-generation sequencing technology, kit and application thereof
PendingCN112852966AImprove practicalityHelp designBioreactor/fermenter combinationsBiological substance pretreatmentsMolecular biologyGenetic testing
The invention belongs to the technical field of pancreatic cancer multi-gene detection, and discloses a pancreatic cancer detection panel based on a next-generation sequencing technology, events such as gene mutation, copy number variation and the like having clear clinical correlation with pancreatic cancer, a multi-gene screening list is made into a probe, high-risk genes are detected in a targeted manner through DNA sequencing, gene mutation with guiding significance on diagnosis and treatment can be detected more efficiently, mutant genes can be detected in a targeted mode, and the gene detection cost of patients can also be reduced.
Owner:FUDAN UNIV SHANGHAI CANCER CENT
Liquid optically clear adhesive for full lamination
ActiveCN105505275AImprove the display effectReduce reflectionNon-macromolecular adhesive additivesMacromolecular adhesive additivesOptical propertyAdhesive
The invention provides a liquid optically clear adhesive for full lamination. The liquid optically clear adhesive comprises the following components in percentage by weight: 10-60% of modified liquid isoprene rubber prepolymer, 10-60% of modified epoxy resin, 2.5-15% of a reactive diluent, 15-50% of a mixed photoinitiator and 1-20% of an additive. Through adoption of the liquid optically clear adhesive, not only is double ultraviolet and heat curing realized, but also the curing shrinkage percentage is smaller than 1%, the refractive index is 1.53-1.56, and the light transmittance reaches 98% or above, so that optical property requirements can be met.
Owner:深圳市库泰克电子材料技术有限公司
Image processing method for chest X-ray DR (digital radiography) image rib inhibition
ActiveCN105125228AIncrease visual salienceFully automatic processing2D-image generationRadiation diagnosticsImaging processingDecomposition
The invention discloses an image processing method for chest X-ray DR (digital radiography) image rib inhibition. The method comprises the following steps: acquiring a chest X-ray DR image; performing pyramid decomposition on the DR image, performing a down sampling process to obtain a Gaussian image pyramid S, and performing an up sampling process to obtain a Laplacian image pyramid difference chart D(S); taking the minimum S as a current to-be-processed image I; performing filtering processing on the image I by using an adjustable Gabor filter bank so as to obtain a reconstructed image R; differencing the to-be-processed image I and the reconstructed image R to obtain a processing result image E with weakened segment-shaped textures under the scale; and doubling the processing result image E, adding the processing result image E and a corresponding Laplacian image pyramid difference chart D(S) under the size together, and repeating the processing procedure until the size is the same as that of an original DR image, thereby obtaining an image after rib inhibition. According to the method disclosed by the invention, the visual saliency of pulmonary shadows is improved, the workload of doctors is reduced, automatic processing can be realized, and an analysis conclusion is more objective and stable.
Owner:SICHUAN UNIV
Breast cancer-related kinase mutation detection panel and application thereof
PendingCN110806479ALearn about genetic variantsHelp designBiological material analysisGenes mutationTyrosine
The invention discloses a breast cancer-related kinase mutation detection panel. The detection panel comprises receptor tyrosine kinase (RTK), phosphatidylinositol 3-kinase (PI3K), mitogen-activated protein kinase (MAPK) related genes, and an exon region and a part of intronic regions of a downstream gene. The invention further discloses a kit containing the detection panel. The detection panel can detect gene mutation guiding diagnosis and treatment more efficiently, is of great significance to clinical diagnosis and discovery of a target spot of target treatment, and can help lower gene detection cost of patients.
Owner:FUDAN UNIV SHANGHAI CANCER CENT
Industrial mechanical arm motion planning method based on reinforcement learning algorithm
PendingCN113510704ARealize intelligent controlImprove adaptabilityProgramme-controlled manipulatorArmsAlgorithmSimulation
The invention discloses an industrial mechanical arm motion planning method based on a reinforcement learning algorithm, and belongs to the field of application of reinforcement learning to mechanical arm motion planning. The reinforcement learning Actor-Critic algorithm is applied to the motion planning of a mechanical arm, so that an interactive relationship is established between the mechanical arm and the environment, and the adaptive capacity of the mechanical arm to the environment is improved through real-time interaction with the environment for training, so that autonomous learning control is realized; and firstly, a simulation environment of a mechanical arm hand-eye system is built, then a reinforcement learning algorithm model is built according to the simulation environment, finally, motion planning training of the mechanical arm is completed, and intelligent control over the mechanical arm is achieved. The mechanical arm motion planning algorithm based on reinforcement learning has good environmental adaptability and stability.
Owner:青岛博晟优控智能科技有限公司
Amorphous entecavir p-toluenesulfonate salt and preparation method and medicament application thereof
The invention provides amorphous entecavir p-toluenesulfonate salt with high bioavailability, high stability, high yield and high purity. The amorphous entecavir p-toluenesulfonate salt is determined as an amorphous state of entecavir p-toluenesulfonate salt through detections such as X-ray diffraction, infrared absorption spectrum determined by a KBr tablet method, differential scanning calorimetry (DSC) and the like. The invention also relates to a preparation method and medicament application of the amorphous salt.
Owner:FUJIAN COSUNTER PHARMA
Lobaplatin crystal, and preparation method thereof and pharmaceutical application thereof
ActiveCN105218587AImprove bioavailabilityNot easy to absorb moisture and become stickyGroup 8/9/10/18 element organic compoundsAntineoplastic agentsSolubilityX-ray
The invention relates to a lobaplatin crystal, and a preparation method thereof and a pharmaceutical application thereof. The crystal has a crystal form of E, and has a melting point Tm.p.. of 214+ / -5 DEG C. In an X-ray powder diffraction PXRD pattern of the crystal, diffraction peaks appear when 2theta angle values are 6.61, 8.09, 12.38, 13.03, 15.40, 16.66, 17.47 and 19.07, wherein an 2theta value error range is 0.2. The crystal form E is obtained through the following steps: glycol dimethyl ether is added into lobaplatin dihydrate; suspension stirring is carried out, and crystals are precipitated; the crystals are separated and dried, such that white powder is obtained. Therefore, the novel crystal form E of lobaplatin is obtained. Compared with existing lobaplatin trihydrate, the crystal form provided by the invention has better stability and solubility. The crystal form is suitable to be used for preparing various forms of pharmaceutical preparations, and is suitable for storage and application. The crystal can be better used for treating cancers such as breast cancer, small-cell lung cancer or chronic myelogenous leukemia.
Owner:GUIZHOU YIBAI PHARMA CO LTD
Material structure quantitative analysis method based on transmission electron microscope HAADF image
InactiveCN105527461AAvoid workloadAvoid errorsScanning probe techniquesStatistical analysisOperability
The invention provides a material structure quantitative analysis method based on a transmission electron microscope HAADF image. The method is characterized by obtaining the coordinate position of each atom lattice in a transmission electron microscope high-resolution image through the image processing technique to obtain integral intensity of each atom and neighbourhood normalized intensity; and by fully combining the relation between HAADF imaging principle and intensity information, obtaining some quantitative information on the basis of qualitative research of the HAADF image. Through the data of the atomic lattice coordinates and normalized intensity and the like, a plurality of quantitative structure information can be obtained through analysis. In the method, the determination of the atom lattice coordinates and integral intensity is scientific and reasonable; application of the neighbourhood normalized intensity avoids the influence due to the case that the material (especially the polycrystal nanometer material) has larger range of structure fluctuation and defects; and the structure information can be summarized and analyzed quickly, and enormous workloads and errors due to manual measurement are prevented. The method has the advantages of accurate result, wide application range and high operability and the like.
Owner:BEIJING UNIV OF TECH
Synchronous rectification control circuit, power converter and control method thereof
ActiveCN106602881AHelp designAvoid simultaneous conductionEfficient power electronics conversionDc-dc conversionTime informationControl signal
The present invention discloses a synchronous rectification control circuit, a power converter and a control method thereof. The synchronous rectification control circuit comprises a continuous current time detection circuit which is coupled to the power end of a synchronous switch tube and is used for obtaining a continuous current time signal, a rectification time control circuit which is coupled to the continuous current time detection circuit and is used for obtaining continuous current time information according to the continuous current time and thus generating a rectification time control signal, and a logic gate which is used for generating the switch control signal of the synchronous switch tube according to the continuous current time signal and the rectification time control signal, wherein the rectification time control circuit stores the first continuous current time information of a former switch period and compares the first continuous current time information of the former switch period and the second continuous current time information of a current switch period, and thus generates the rectification time control signal so as to avoid the simultaneous conduction of a main switch tube and a simultaneous switch tube. The synchronous rectification control circuit is compatible with a current continuous mode and a current interruption mode.
Owner:HANGZHOU SILAN MICROELECTRONICS
A flexible passive foot system based on bionics
The invention relates to a flexible passive foot system based on bionics, comprising a flexible toe joint and a lateral cushioning shock absorbing layer, which enables the foot to have the functions of stable support, cushioning shock absorbing and energy storage. The flexibility of the toe joint is provided by a compression spring parallel to the sole of the foot, and the toe portion is connectedto the sole of the foot by a crank linkage mechanism. The shock-absorbing springs are symmetrically distributed in the upper and lower layers of the foot, which is helpful to enhance the stability ofthe robot when walking on uneven ground, and can effectively eliminate the impact of the ground on the foot when walking. The invention realizes the degree of freedom of flexion and extension of thetoe joint and the lateral passive degree of freedom of the foot through the compression and extension functions of the compression spring, and simultaneously utilizes the energy storage characteristics of the spring to enable the foot to have the functions of cushioning, shock absorption and energy saving, so that the walking stability of the robot can be improved and the energy loss can be reduced. Compared with the foot structure of the traditional robot, the invention has the advantages of good imitation of human nature, high walking stability, high energy efficiency, compact structure andgood adaptability.
Owner:WUHAN UNIV
Large-scale data mining method capable of guaranteeing quality monotony
ActiveCN104657473AIncrease flexibilityQuality improvementSpecial data processing applicationsData compressionData set
The invention provides a data mining method capable of guaranteeing quality monotony. The method comprises the following steps: after an original big data set is compressed by a PCA (principal components analysis) technology, mapping the original big data set onto an R-tree data structure; then, carrying out mining processing on the data set by an improved K-nearest neighbor classification algorithm. The method mainly comprises the following two parts including a coding part and a mining part, wherein the coding part utilizes R-tree to present data, data with high similarity in the data is combined to serve as one node of the R-tree so as to achieve a purpose of mass data compression and improve the efficiency of the mining part; the mining part utilizes the thought of the improved K-nearest neighbor classification algorithm to process the data node and predict the classification of an input test point. According to the large-scale data mining method, the problem that the quality of a mining result and resource restriction cannot be balanced and the quality monotony of an approximate result cannot be guaranteed when big data is mined by a traditional algorithm under the restriction of limited time and resource restriction can be solved.
Owner:NANJING UNIV OF POSTS & TELECOMM
Voltage-controlled oscillator
Owner:コラボイノベーションズインコーポレイテッド
Deep learning-based inverse synthesis prediction method and device, medium and equipment
PendingCN114220496AImprove accuracySolve the problem of not fully considering the molecular structure informationChemical property predictionMolecular entity identificationPrediction methodsAlgorithm
The invention provides an inverse synthesis prediction method and device based on deep learning, a medium and equipment. The method comprises the following steps: converting a target product into an SMILES sequence; extracting structure information of the SMILES sequence, wherein the structure information comprises degree information and adjacent matrix information; encoding to obtain a degree information code and an adjacent information code; the SMILES sequence is input into a Transform model encoder, and the encoding of the SMILES sequence is optimized by utilizing degree information encoding and adjacency information encoding; and the Transformer model inputs an encoding result of the encoder into a decoder for decoding to obtain an SMILES sequence of the reactant set, and then the SMILES sequence is converted to obtain a corresponding reactant. According to the method, the problem that molecular structure information cannot be fully considered by the SMILES sequence is solved, and the accuracy of a model prediction result is improved.
Owner:SOUTH CHINA UNIV OF TECH
Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)
InactiveCN108242808AFully consider the scaleFully consider the impact of communication time lagPower oscillations reduction/preventionTime delaysElectric power system
The invention discloses a method for judging the stability of a time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep). The method comprises steps of establishing a time-delay power system model; using a linear multi-step method LMS to discretize infinitesimal generators to obtain a discretization matrix of the infinitesimal generators; converting the eigenvalue problem of infinite dimensional into the eigenvalue problem of finite dimensional; calculating the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators by the implicit Arnoldi algorithm; performing sparse implementation using the displacement-inverse transformation and Kronecker products in the calculation process; according to the mapping relation, converting the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators intothe approximate value of the time-delay power system module; correcting the approximate value by using the Newton iteration method to obtain the accurate eigenvalue of the time-delay power system; anddetermining the stability of the time-delay power system according to the magnitude of the accurate eigenvalue.
Owner:SHANDONG UNIV
Lobaplatin crystal and preparation method and drug application thereof
ActiveCN105440083AImprove bioavailabilityNot easy to absorb moisture and become stickyGroup 8/9/10/18 element organic compoundsAntineoplastic agentsSolubilityChronic granulocytic leukemia
The present invention relates to a lobaplatin crystal and a preparation method and drug application thereof, the lobaplatin crystal form is B, the melting point Tm. p. . is 230 + / -5 DEG C, diffraction peaks exist at the 2 theta angle values of 8.25, 9.77, 11.70, 13.13, 15.28, 16.48, 17.22, 17. 74, 19.01, 19.56, 22.28, 23.72, 24.04, 24.30, 25.62, 26.20, 28.57, 30.22 and 30.61 in an X-ray powder diffraction PXRD spectrum, wherein the 2 theta angle value error is in the range of 0.2. The crystal form B is obtained by solvent evaporation of lobaplatin trihydrate, or volatilization at room temperature after addition of a solvent in lobaplatin dihydrate or solvent-out crystallization, and drying. Compared with lobaplatin and the lobaplatin trihydrate in the prior art, the lobaplatin crystal in the crystal form B has better stability and solubility, is more suitable for the preparation of various forms of pharmaceutical preparations and storage and use, and can be better used to treat cancers such as breast cancer, small cell lung cancer or chronic granulocytic leukemia.
Owner:GUIZHOU YIBAI PHARMA CO LTD
Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method
ActiveCN101324538BHelp optimizeHelp designMaterial impedanceElectrical resistance and conductanceElectrical battery
Owner:SHENZHEN BAK POWER BATTERY CO LTD
Integrated LED element with epitaxial structure and packaging substrate which are integrated, and manufacturing method thereof
ActiveCN104183580AShort heat conduction pathReduce thermal resistanceSolid-state devicesSemiconductor devicesIndependent elementEngineering
The invention discloses an integrated LED element with an epitaxial structure and a packaging structure which are integrated, and a manufacturing method thereof. The integrated LED element is an independent and integrated member which is obtained through forming the epitaxial structure, electrodes and leads of the LED are directly on a substrate. The LED element has a polycrystalline module structure or a monocrystalline structure. The LED element can be inserted into a bare and empty bearing member. Furthermore through the supporting of the bare and empty bearing member, the lower surface of the substrate of the LED element can be directly placed on and contacts with a heat-conductive element or heat radiating element. The LED element is an independent element which is directly manufactured on and cut from a wafer. The structure of the LED element can be a vertical structure or a transverse structure according to different manufacturing modes.
Owner:JADE BIRD DISPLAY SHANGHAI LTD
Method for evaluating separation effect of coarse powder separator during mixed coal grinding
InactiveCN111610043AReduce on-site coordination workloadHelp designStructural/machines measurementParticle size analysisPower stationProcess engineering
The invention relates to a method for evaluating the separation effect of a coarse powder separator during mixed coal milling. The method comprises the steps: evaluating the separation effect of the coarse powder separator during mixed coal milling according to the amount of coarse pulverized coal in fine pulverized coal at an outlet of the coarse powder separator before entering the next processor the amount of fine pulverized coal in the coarse pulverized coal returned to a coal mill, wherein before entering the next process, the smaller the amount of the coarse pulverized coal in the finepulverized coal at the outlet of the coarse pulverized coal separator is, the better the separation effect of the coarse pulverized coal separator is; the smaller the amount of the fine pulverized coal in the coarse pulverized coal returned to the coal mill is, the better the separation effect of the coarse pulverized coal separator is. According to the invention, the test time is shortened, and the field coordination workload of the outlet pulverized coal fineness test of the coarse powder separator is reduced; the test boundary conditions are simplified, the test cost is reduced, the changerule of the performance of the coarse powder separator in the transformation or overhaul period can be known, the design, operation and maintenance and transformation work of the power station boilerpulverizing system can be facilitated, and the energy-saving level of the power station boiler pulverizing system can be improved.
Owner:STATE GRID HEBEI ELECTRIC POWER RES INST +2
Magnetic recording medium and magnetic recording and reproducing apparatus
ActiveCN101203908AEasy to manufactureHelp designRecord information storageCathode sputtering applicationRecording layerRecording media
The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.
Owner:TOHOKU UNIV +2
Levitation control simulation platform for high-speed and medium-low-speed maglev trains
ActiveCN111103809AContribute to researchHelp designSimulator controlEngineeringComputational physics
The invention relates to a levitation control simulation platform for high-speed and medium-low-speed maglev trains. The platform comprises a high-speed maglev train track magnetic coupling test bed,a medium-low-speed maglev train single-point levitation test bed and a DSPACE semi-physical simulation platform. The high-speed maglev train track magnetic coupling test bed is used for simulating track faults and track excitation conditions. The medium-low speed maglev train single-point levitation test bed is used for simulating the train load change situation caused by getting-on and getting-off of passengers in the running process of a medium-low speed maglev train. And a program runs in the DSPACE semi-physical simulation platform and is used for switching suspension algorithms and control parameters in the two test stands. Compared with the prior art, the platform is more suitable for the actual application conditions of two trains in the operation process, so that the magnetic levitation control algorithm researched and designed based on the platform is more accurate.
Owner:TONGJI UNIV +1
Multi-loop and unequal-section cable cluster laying method
InactiveCN104466803AConvenient ArrangementHelp with assessmentSpecial data processing applicationsApparatus for laying cablesCarrying capacityEngineering
The invention provides a multi-loop and unequal-section cable cluster laying method. The method comprises the steps that the cable cluster laying mode, environment parameters and structural parameters and calculation parameters of cables in a cable cluster are obtained; a cable cluster carrying capacity optimized design mathematic model is established according to the cable cluster laying mode, the environment parameters and the structural parameters and the calculation parameters of the cables in the cable cluster; iteration is carried out through a barrier function, the cable cluster carrying capacity optimized design mathematic model is solved, and the cable cluster carrying capacity is obtained; whether laying of the multi-loop and unequal-section cable cluster is reasonable or not is judged according to the carrying capacity of the cable cluster, and if not, the cable cluster carrying capacity and / or arrangement are / is adjusted. Optimization from two aspects including the carrying capacity running optimization and line arrangement optimization can be achieved through the multi-loop and unequal-section cable cluster laying method. The dynamitic running load is more flexible and accurate. Meanwhile, the optimization result can serve as a cable dispatching running reference basis.
Owner:SHENZHEN POWER SUPPLY BUREAU +1
Test fixture for fuel cell membrane electrode
PendingCN113176502AThe test results are accurateHelp designElectrical testingMeasurement instrument housingPhysicsEngineering
The invention relates to a test fixture for a fuel cell membrane electrode. The test fixture comprises a frame, a single cell assembly, a pressing assembly, a gas conveying assembly and a detection assembly, a containing cavity is formed in the frame, and the bottom of the containing cavity is horizontal. The single battery assembly comprises a first polar plate and a second polar plate, the first polar plate is horizontally arranged at the bottom of the accommodating cavity, the second polar plate is detachably mounted at the upper end of the first polar plate, the pressing assembly comprises a pressing mechanism and a pressure detector, and the pressure detector is used for detecting pressing force; the detection assembly is connected with the single battery assembly, and the gas conveying assembly is connected with the single battery assembly; a temporary single battery is formed between a first polar plate and a second polar plate, and the first polar plate and the second polar plate are pressed by a pressing assembly with a pressure detector, so that the assembling pressure value of the temporary single battery can be monitored and displayed in real time, and the pressed state of a membrane electrode can be quickly known; the influence of the assembly pressure of the temporary single battery on the performance of the membrane electrode can be accurately obtained, so that the test result is more accurate.
Owner:中船重工黄冈水中装备动力有限公司
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