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50results about How to "Reasonableness of judgment" patented technology

Filling mining multi-information dynamic monitoring method

The invention provides a filling mining multi-information dynamic monitoring method, which is applicable to dynamically monitoring the filling mining multi-information of a waste filling mining area. A vertical displacement meter, a horizontal displacement meter, a vertical pressure meter, a transverse pressure meter, a hydrographic comprehensive test instrument and a gas comprehensive test instrument are arranged in a goaf space of a monitoring section; a borehole stress meter and a multipoint displacement meter are arranged in the position corresponding to a sidewall waist line along a direction vertical to the surface, and a borehole arrangement separation layer indicator is arranged on the top part along a direction vertical to the surface; and the vertical displacement, horizontal displacement, vertical pressure, transverse pressure, water level, water flow, water quality, water pressure, gas concentration, CO concentration, temperature, stress of different positions in coal or rock, displacement and separation layer signals are acquired, and output lines through connection boxes are connected to form a bus which is connected with a multi-channel connection box, and the multi-channel connection box is sequentially connected with communication sub-stations under a mine and a main station, so that the monitored signals are dynamically outputted to a ground work station in real time so as to realize the dynamic monitoring of the filling mining multi-information.
Owner:CHINA UNIV OF MINING & TECH

Method for implementing plan security check on basis of power grid operation service bus

The invention provides a method for implementing plan security check on basis of a power grid operation service bus and aims to solve the problem that a power grid dispatch automation system is lack of a universal plan check method. Firstly, plan check data are obtained, power grid plan data and load prediction data are gathered through the power grid operation service bus in the power grid dispatch automation system, and the plan check data are subjected to data decomposition according to a plan object; then a future mode fracture surface is generated and security check is performed, a power grid flow model of a checked point is corrected according to the plan data so as to form a predicted flow fracture surface at a future plan moment, and power flow calculation and static security analysis are called through the power grid operation service bus to perform security check on the future mode fracture surface; finally, plan security check services are established, the predicted flow fracture surface and check result information at the future plan moment are output through the power grid operation service bus, and plan check is performed through arrangement of the plan security check services in terms of each application system or module.
Owner:CHINA SOUTHERN POWER GRID COMPANY +1

Displacement experiment artificial core analysis preparing method based on experimental and mathematical algorithms

The invention discloses a displacement experiment artificial core analysis preparing method based on experimental and mathematical algorithms, and the method combines qualitation with quantitation. The method comprises the steps that physical parameters of an artificial core are used as target parameters for preparation of the artificial core; influencing factors of the physical parameters of theartificial core are determined; multiple sets of combined experiment schemes are made, and the artificial core is prepared according to all the combined experiment schemes, and the physical parametersof the artificial core are measured after preparation is completed; preparation condition parameters of all the combined experiment schemes are used as basis, and based on a gray correlation analysismethod, relevancy degrees of all the influencing factors and all the target parameters are determined; according to the relevancy degree rank of all the influencing factors and the target parameters,larger influencing factors and smaller influencing factors are determined; based on a statistic analysis result of the gray correlation analysis method and a BP neural network theory, a particle sizeratio prediction mathematical model is built; a matching prediction result is calculated through the particle size ratio prediction mathematical model and serves as a reference which provides data support for artificial core manufacturing.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Positive solution determining method of three-connecting-rod type parallel-structured robot

The invention discloses a positive solution determining method of a three-connecting-rod type parallel-structured robot. The three-connecting-rod type parallel-structured robot mainly structurally comprises a motion platform (1), three connecting rods (L1, L2 and L3) and three standing columns (2), wherein the motion platform (1) is connected with the three connecting rods (L1, L2 and L3) through three ball hinges (b1, b2 and b3), the three connecting rods (L1, L2 and L3) are connected with three slide seats (3) through three cylinder hinges (R1, R2 and R3), the three slide seats (3) vertically slide on the three standing columns (2), and the three ball hinges (b1, b2 and b3) form a regular triangle. The positive solution determining method has the advantages that random setting of initial solutions is performed by a Monte-Carlo method, all possible solutions are acquired through a large amount of random sampling, a motion platform position and pose diagram is drawn, and accordingly solution reasonability can be judged visually and conveniently; the method is academically significant to and has practical value on 3-PRS parallel robot working space design, analysis and optimization and promoting wide application of the 3-PRS parallel robot to industrial production.
Owner:HENAN POLYTECHNIC UNIV

Method for optimizing site selection of electric vehicle charging station based on big data analysis

The invention discloses a method for optimizing site selection of an electric vehicle charging station based on big data analysis. The method comprises the following steps: obtaining annual total power consumption data and position data of a community in a region and position data of public facilities; determining a total power consumption score weight parameter of the community and a weight parameter of a public facility; calculating weight parameters to form a parameter matrix X; determining a charging pile utilization rate evaluation standard to obtain a classification column vector Y; selecting a training set and a test set, and based on the parameter matrix X and the classification column vector Y, utilizing a decision tree algorithm to obtain a charging station site selection rationality analysis model; inputting the longitude and latitude of the place of the charging station to be built into the model for rationality analysis; and outputting a report. Big data analysis is carried out based on existing data, the decision tree algorithm is adopted to automatically judge the reasonability of site selection of the to-be-built charging station and give a reasonability analysis report, site selection of the electric vehicle charging station is optimized, and then the utilization rate of the charging station is increased.
Owner:国网天津市电力公司滨海供电分公司 +3

Three-dimensional display and dead zone determining method of ground received electromagnetic signals of unmanned aerial vehicle

The invention discloses three-dimensional display and dead zone determining method of ground received electromagnetic signals of an unmanned aerial vehicle. The three-dimensional display and dead zone determining method comprises the following steps: firstly, reading downlink data of a communication data chain in a network data reading manner, extracting the electromagnetic signal strength in an area near a ground receiving station from the downlink data, and screening and pre-processing data; then, performing unit modelling and attribute definition of a three-dimensional visual display model according to the receiving position and the numerical value of the data; finally, loading the three-dimensional visual operation of the data in different display lists according to a flight forward journey of the unmanned aerial vehicle by utilizing a computer graphic technology so as to realize three-dimensional visual display of the data; and determining the position of a communication dead zone by using a threshold value judging method, and adjusting the direction of a route so as to obtain the best planned route. According to the invention, the electromagnetic signal strength of the ground receiving end in the flight process of the unmanned aerial vehicle can be displayed dynamically in real time, and therefore, the method disclosed by the invention is applicable to monitoring chain information under multiple links and multiple channels and planning the route.
Owner:BEIHANG UNIV

Automatic modeling method of hybrid drive system of series-parallel caterpillar vehicle with horizontal shaft

The invention relates to an automatic modeling method of a hybrid drive system of a series-parallel caterpillar vehicle with a horizontal shaft. The automatic modeling method comprises the steps of determining a D matrix and a Ds matrix, screening structural types, generating unified model matrixes and optimizing a structural type, wherein a final model matrix equation is shown in the description, the Dm represents the composited D matrix, elements on diagonal lines of all lines of the Jm matrix are equal to the sum of rotational inertias of the portions connected with nodes corresponding to the lines, equivalent to the node positions, the portions connected with the nodes are determined through the Dm matrix, the equation represents a composited accelerated speed column vector, and Tm represents a composited external torque column vector. The automatic modeling method can be used for conducting automatic modeling and optimization on the hybrid drive system of the series-parallel caterpillar vehicle and is simple in modeling process, high in modeling efficiency and high in usability.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Electromechanical coupling prediction method for performance of deformed distributed MEMS phase shifter

The invention discloses an electromechanical coupling prediction method for the performance of a deformed distributed MEMS phase shifter. The method comprises the steps of 1) determining structure parameters, material attributes and electromagnetic working parameters of a distributed MEMS phase shifter; 2) determining equivalent circuit parameters of the distributed MEMS phase shifter; 3) determining a working environment condition; 4) performing mechanical analysis on a structure and extracting a maximum offset after structure deformation; 5) calculating the value of a variable capacitor composed of each MEMS bridge and a transmission line after structure deformation; 6) establishing an electromechanical coupling model of each MEMS bridge and calculating phase-shift magnitude; 7) calculating the phase-shift magnitude; and 8) judging whether the phase-shift magnitude of the phase shifter meets a requirement or not. The electromechanical coupling model for the structure parameters and the phase-shift magnitude of the distributed MEMS phase shifter, established with the method, can directly analyze the influence of the structure parameters on the phase-shift magnitude of the phase shifter, and can be used for quantitatively evaluating the influence of the structure deformation on the phase-shift magnitude of the distributed MEMS phase shifter in a load environment so as to guide the design and optimization of the distributed MEMS phase shifter.
Owner:XIDIAN UNIV

Multi-modal small sample learning method based on significance

The invention discloses a multi-modal small sample learning method based on significance, which comprises a multi-modal combination part and a label propagation part, and specifically comprises the following steps: in a multi-modal combination process, firstly, carrying out significance map extraction on sample images of a support set through a pre-trained significance detection network, and separating out foregrounds and backgrounds of the sample images; secondly, acquiring word embedding of support set sample image foreground and background region semantics through a GloVe model as semanticinformation to assist visual information classification; and finally, performing adaptive combination on foreground, background and semantic information of the acquired support set sample image through a modal mixing mechanism to obtain sample feature representation with multi-modal information; in a label propagation process, firstly, subjecting a support set sample and a query set sample after modal combination to graph construction according to a K-nearest neighbor method; and finally, predicting the category of the query set sample without the label through the support set sample with thelabel.
Owner:TIANJIN UNIV

Intelligent monitoring and control system of vehicle filter

The invention discloses an intelligent monitoring and control system of a vehicle filter. A host control system is integrated with a read-write module, a communication module, an identification moduleand a data acquisition module, wherein the read-write module is connected with a CAN bus interface of an electrical system, the identification module reads and writes information on an electronic tag, the data acquisition module acquires corresponding data information in the filter, a residual service life of a filter element can be estimated according to the information, the communication moduleis connected with a cloud platform through a data link, and the cloud platform is connected with a plurality of clients. In the invention, the host control system comprehensively monitors each pieceof parameter information of the whole filter so as to achieve a purpose of correcting the residual service life of the filter element; and for the different filter elements, related information acquired by an oil product sensor also participates in correcting residual service life information of the filter elements so that neglect of parameter information influencing a pressure drop and a resistance is avoided, a pressure drop value is monitored more accurately, and the residual service life value of the filter can be reflected more accurately.
Owner:无锡亿利环保科技有限公司

Method for setting induction stirring parameter of round blank continuous casting crystallizer

The invention relates to a method for formulating electromagnetic stirring parameters of a round billet continuous casting crystallizer. In order to overcome the problem that there are few studies on the determination of stirring parameters or the research conclusions are quite different, a combination of steel type, billet size, casting machine and electromagnetic stirring equipment is invented, and the electromagnetic stirring is determined through numerical simulation analysis and experimental verification. The formulation method of parameters such as current intensity and frequency. This method is based on the simulation results of the magnetic field distribution of electromagnetic stirring, and performs coupling calculations on the flow field, temperature field, and movement trajectory of the molten steel in the mold during the electromagnetic stirring process. The rationality of the electromagnetic stirring parameters is judged by investigating and judging the rationality of the electromagnetic stirring parameters, and then the calculation results are compared with the field sampling test to determine the electromagnetic stirring parameters. The method of the present invention can quickly, accurately and effectively determine the current intensity and frequency of electromagnetic stirring under different conditions, significantly reduce inclusions and air bubbles on the surface of the slab and under the skin, expand the equiaxed crystal ratio, improve the quality of the core, and increase the compactness of the structure and uniformity.
Owner:TIANJIN IRON & STEEL GRP +1

Method for conveniently judging hydraulic-solar complementary integrated photovoltaic scale under complex power grid

PendingCN112184016AEasy to understandEasy to change degreeResourcesElectric power systemPower grid
The invention discloses a method for conveniently judging a hydraulic-solar complementary integrated photovoltaic scale under a complex power grid. The method comprises the following steps: S1, analyzing or collecting hourly output processes of a hydropower station and a photovoltaic power station in each typical year; S2, collecting and analyzing the sending-out channel scale of the hydropower station; S3, in combination with the water-electricity and sending-out channel attribution hydraulic-solar complementation situation, a hydraulic-solar attribution complementation proportion scheme is formulated to calculate complementary water-electricity and channel capacity used for complementation; S 4, calculating a light abandoning rate; and S5, calculating the photovoltaic absorption rates ofthe photovoltaic installation scale schemes of different scales under the condition of different hydropower incorporation complementation proportions based on the hydropower incorporation complementation proportions and the light abandonment rates until an optimal solution is obtained. The invention provides a method capable of quickly judging whether the hydraulic-solar complementary integratedphotovoltaic scale is proper or not for the condition that whether the photovoltaic scale is reasonable or not is difficult to quickly judge due to many analysis data, various target functions and complex constraint conditions during large-scale photovoltaic grid-connected consumption of a complex power system.
Owner:CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD

X-band MEMS phase shifter performance prediction method based on thermal environment and bridge material properties

ActiveCN109145448ASolve the problem of phase shift performance impactJudgment performanceDesign optimisation/simulationSpecial data processing applicationsPhase shiftedBridge material
The invention discloses an X-band MEMS phase shifter performance prediction method based on thermal environment and bridge material properties, which comprises the following steps: determining the structural parameters, material properties and electromagnetic working parameters of the X-band MEMS phase shifter; establishing a structure-thermal deformation simulation model and thermal simulation, the temperature of MEMS bridge being extracted by simulation; the modulus of elasticity of MEMS bridge material under thermal environment being measured and fitted with a function; the pull-down voltage of MEMS phase shifter being calculated, which causes the height error of MEMS bridge; according to the error, the phase shift of MEMS bridge being calculated by using the electromechanical couplingmodel of MEMS bridge; calculating the phase shift of the MEMS phase shifter; the phase shift of MEMS phase shifter under the current thermal environment and material properties being predicted. The method can directly analyze the influence of thermal environment and bridge material properties on the phase shifter, and directly predict the phase shift of MEMS phase shifter by using ambient temperature, which can guide the design and optimization, and improve the robustness of the phase shifter under the working environment.
Owner:XIDIAN UNIV

Simulation test system and method for control program of cigarette sorting system

The invention discloses a simulation test system and method for a control program of a cigarette sorting system. The method comprises the steps of carrying out the design of the control program whilebuilding a simulation environment, and downloading the control program into a PLC after the design is completed, enabling the PLC to perform input and output linkage communication with the simulationenvironment through the Ethernet, and if the control program does not pass the test, modifying and testing the control program again until passing the test. According to the method, three-dimensionalmodel compiling, model program compiling and testing are integrated into one platform, so that the learning cost caused by switching among multiple pieces of three-dimensional software is reduced, andthe test time is saved; the cigarette model is used as a load for simulation, the motion condition that mechanical equipment is controlled by a control program can be observed, and meanwhile, the influence of the motion of the mechanical equipment on the load can be visually and vividly observed, so that the correctness and rationality of the control program are judged; an order simulation tool is used for automatic test, a large amount of labor cost is reduced, and the test efficiency is improved.
Owner:KUNMING KSEC LOGISTIC INFORMATION IND

Garbage classification recycling facility adding method and system based on step suitable index improvement

The invention discloses a garbage classification recycling facility adding method and system based on step suitable index improvement, and belongs to the field of municipal engineering and remote sensing. The problem that existing garbage can not be collected and transported in time due to excessive daily energy generation is solved. The method comprises the following steps: acquiring OSM road network data, DEM elevation data, population density and residential area data; connecting OSM road network breakpoints; obtaining a garbage classification output ratio, and calculating a facility score weight according to the garbage classification output ratio; calculating a step-suitable distance attenuation index; obtaining a recovery function index according to the distance attenuation index and the facility score weight; substituting the longitude and latitude of the to-be-calculated area, the OSM road network data and the DEM elevation data into a WalkScore algorithm to calculate and obtain a walking environment index; normalizing the recovery function index and the walking environment index, and adding to obtain a step suitability index; visualizing the step suitability index and the garbage space distribution position, setting a threshold value, and additionally arranging a garbage recycling facility for the space distribution position not higher than the threshold value. The device is used for additionally arranging the garbage classification recycling facility.
Owner:HARBIN INST OF TECH

Method and device for analyzing capability dependency relationship in complex system architecture

The invention discloses a method and device for analyzing a capability dependence relationship in a complex system architecture, and the method comprises the steps of determining the capability, related to each information exchange relationship, of each business according to the information exchange relationship of the business in the complex system architecture and the relationship between the capability and the business; and for the two services with the information exchange relationship, analyzing that the capability associated with the two services has a dependency relationship. By applying the invention, the capability dependency relationship in the complex system architecture can be automatically analyzed, so that the construction and evolution of the complex system can be effectively and scientifically planned.
Owner:NAT UNIV OF DEFENSE TECH

Fan control system and method aiming at fan control signal state

The invention discloses a fan control system and method aiming at a fan control signal state and belongs to the technical field of server heat dissipation. The fan control system aiming at the fan control signal state is composed of a first node, a second node, a comparator, a trigger and a fan. The first node and the second node are connected with the comparator, and fan control signal recognition algorithms are added to control programs in the first node and the second node respectively. The fan is connected with the comparator, the first node and the second node, and two adjacent fan control signal pins on fan terminal pins are connected. The trigger is connected with the first node, the second node and the fan. According to the fan control system aiming at the fan control signal state, after a backboard comparator breaks down, fan control can still be achieved, the problem of complete machine heat dissipation caused by component faults is avoided, therefore, normal work of a server is guaranteed, and high application and popularization value is achieved.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD

A method for three-dimensional display and blind area determination of electromagnetic signals received by UAV on the ground

The invention discloses a three-dimensional display and blind area determination method for unmanned aerial vehicles receiving electromagnetic signals on the ground. Firstly, the downlink data of the communication data link is read through the network data reading method, and the electromagnetic signal strength of the area near the ground receiving station is extracted therefrom, and Perform data filtering and preprocessing operations. Then, according to the receiving position and numerical value of the data, the unit modeling and attribute definition of the three-dimensional visualization display model are carried out. Finally, using computer graphics technology, the three-dimensional visualization operation of data is loaded into different display lists according to the flight distance of the UAV, so as to realize the three-dimensional visualization display of data. Then, the method of threshold judgment is used to determine the position of the blind area of ​​communication, adjust the route direction, and obtain the best planned route. The invention can dynamically display the electromagnetic signal strength of the ground receiving end during the flight of the drone in real time, and is suitable for link information monitoring and route planning under multi-link and multi-channel.
Owner:BEIHANG UNIV

Laser diode simulation circuit

The invention discloses a laser diode simulation circuit, which belongs to the technical field of electronic circuit. The laser diode simulation circuit comprises a threshold setting circuit, a voltage subtractor circuit and a voltage conversion circuit, wherein the threshold setting circuit is used for setting the threshold of the laser diode; the voltage subtractor circuit is used for subtracting the input voltage of the laser diode from a threshold; and the voltage conversion circuit converts the voltage obtained by subtraction into a constant current output in proportion to the voltage.
Owner:SHANDONG UNIV

MOSFET gate-source voltage interference conduction path model

The invention provides an MOSFET gate-source voltage interference conduction path model. The MOSFET gate-source voltage interference conduction path model comprises a double-loop transfer function fordescribing a pulse voltage and pulse current interference conduction process and a characteristic equation for describing a standard second-order system of an interference conduction path. The modelis used for revealing a gate-source voltage interference mechanism occurring when a high-frequency high-power converter and an MOSFET are turned on and turned off at a high speed, and the interferenceconduction path model can comprehensively consider the influence of pulse voltage and pulse current on MOSFET gate-source voltage interference and is used for visually and rapidly judging the rationality of the MOSFET driving parameters, an MOSFET packaging structure and the PCB layout designin in a power conversion system .
Owner:BEIJING JIAOTONG UNIV +1

Parameter optimization design method for SiC MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) driving circuit

The invention provides a SiC MOSFET driving circuit parameter optimization design method, which is used for improving the design reliability of a SiC-based power electronic converter. The parameter design method comprises the following steps: constructing a characteristic polynomial of an interference path transfer function; constructing a standard second-order system according to the characteristic polynomial; taking the input capacitance Ciss of the SiC MOSFET and the resistance Rg in the grid electrode as reference values to carry out parameter per-unit; and verifying whether the stray inductance is small enough or not so as to ensure that the standard second-order system has an enough damping ratio; an auxiliary parallel capacitor per-unit value is designed, so that the standard second-order system obtains a proper transition process with short duration on the premise of having a sufficient damping ratio, and it is ensured that the auxiliary parallel capacitor does not excessivelyinfluence the switching speed; the per-unit value of the driving resistor is designed, the interference peak and interference oscillation of the gate-source voltage are suppressed in a balanced manner, and the switching loss is prevented from being increased due to too slow gate-source voltage change caused by too low cut-off frequency of a driving loop.
Owner:BEIJING JIAOTONG UNIV +1

Pulse laser seed source light detection tool

The invention is applicable to the electronic tool field and provides a pulse laser seed source light detection tool. The pulse laser seed source light detection tool comprises a test lead, a power supply wire and a circuit board; the circuit board is successively connected to an AC / DC conversion module, a DC voltage reduction circuit and a signal amplification circuit; the AC / DC conversion module is connected to external city power through the power supply wire to convert 220V AC y to 24V DC ; the DC voltage reduction circuit reduces the 24V DC voltage to 12V -5V DC voltage to provide working voltage to the signal amplification circuit; one end of the test lead is connected to a pulse laser seed source light monitoring point and the other end is connected to the input end of the signal amplification circuit; and the signal amplification circuit amplifies the electric signal converted by the monitoring point light signal. The pulse laser device seed source light monitoring point is connected through a test lead, the monitoring point can be chosen and moved according to the needs, and amplification can be performed on the electric signal converted from the monitoring point light signal. The invention can determine whether the light in seed source is transmitted into the amplifier, and is stable in test and high in uniformity.
Owner:无锡锐科光纤激光技术有限责任公司

Method for quickly positioning and measuring dead load condition of in-service bridge structure

The invention discloses a method for quickly positioning and measuring the dead load condition of an in-service bridge structure. The method specifically comprises the following steps of: performing layout of measurement and control points and reference points on site according to the geometric morphology of the structure; constructing an absolute coordinate system based on a total station and collecting coordinate data of the reference points; constructing relative coordinates of measurement and control points; according to the absolute reference points P1-P3, obtaining a transmission relation between the absolute coordinate system and the internal and external measurement and control points; a three-dimensional laser scanner is placed on a measurement and control point, and segmented scanning and orientation are carried out on the measurement and control point; performing data processing on the three-dimensional laser point cloud according to point cloud cutting and noise data elimination; an ideal three-dimensional point cloud model is obtained based on data processing, and the volume of concrete is calculated and analyzed. According to the method, accurate positioning can be carried out on internal and external spaces of the bridge, so that the structure size is quickly calculated, the rationality of the overall design of the in-service bridge is judged, and the measurement and control efficiency of influence of dead load variation of the bridge structure on the technical state of the service period of the structure is improved.
Owner:中路高科交通检测检验认证有限公司 +1

Method for detecting design reasonability of N/P ratio of lithium ion three-electrode battery

The invention discloses a method for detecting design reasonability of an N / P ratio of a lithium ion three-electrode battery, and solves the technical problem that the waste of battery synthesis feeding or lithium evolution of the battery in a battery charging process is caused by unreasonable N / P design of the battery, and the battery is dangerous finally. The method comprises the following stepsof S100, placing the lithium ion three-electrode battery in a thermostat with the temperature of 25 DEG C, and connecting to a test cabinet, and charging to a full electric state at a set rate; and S200, judging the reasonability of the N / P design of the battery according to the variation tendency of the potential of the negative electrode pair reference in the charging process. According to themethod, through the changes of a negative electrode potential platform of the three-electrode battery at the different N / P ratios in the charging process, the reasonability of the N / P design of the battery is clearly judged, and the method is simple and feasible to operate, and has a good application prospect in the aspect of battery design.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Analysis and preparation method of artificial core for displacement experiment based on experiment and mathematical algorithm

The invention discloses an artificial core analysis and preparation method for displacement experiments based on experiments and mathematical algorithms combining qualitative and quantitative methods. The physical parameters of the artificial core are taken as the target parameters for the preparation of the artificial core; the influencing factors of the physical parameters of the artificial core are determined; several combined experiment schemes are formulated, and the artificial core is made according to each combined experimental scheme, and the physical parameters of the artificial core are measured after the preparation is completed; Based on the preparation condition parameters of the experimental plan, based on the gray correlation analysis method, the correlation degree between each influencing factor and each target parameter is determined; according to the ranking of the correlation degree between each influencing factor and the target parameter, the larger influencing parameter and the smaller influencing parameter are determined ;Based on the statistical analysis results of the gray correlation method and BP neural network theory, a particle size ratio prediction mathematical model is established; the ratio prediction results are calculated through the particle size ratio prediction mathematical model, and this is used as a reference to provide data support for making artificial cores.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Platform mold inspection device

InactiveCN105081272BDoes not affect rationalityReasonableness of judgmentHydraulic cylinderThe Internet
The invention discloses a platform type die detecting device. The device is characterized by comprising a horizontal guide rail supported through supports; a left die set sliding block and a right die set sliding block are arranged on the horizontal guide rail in a matched mode; a static die connecting plate is arranged on the left die set sliding block, and the connecting surface of the static die connecting plate is perpendicular to the horizontal guide rail; a moving die connecting plate is arranged on the right die set sliding block, and the connecting surface of the moving die connecting plate is perpendicular to the horizontal guide rail; the static die connecting plate and the moving die connecting plate are each provided with a heating device internally; a threaded hole is formed in the center of a rectangular platform; a heightening bolt which penetrates through the horizontal guide rail is arranged inside the threaded hole in a matched mode; the upper end of the heightening bolt is arranged under a lifting platform in an ejecting mode; a left extending body which extends to the lower portion of the horizontal guide rail is connected to the lower portion of the left die set sliding block; a right extending body which extends to the lower portion of the horizontal guide rail is connected to the lower portion of the right die set sliding block; a hydraulic cylinder is connected between the left extending body and the right extending body. The platform type die detecting device is used for die testing, a die-casting machine is not longer occupied, and the normal die casting production is not influenced.
Owner:CHONGQING SUN MAGNESIUM COMPANY

An Electromechanical Coupling Prediction Method for the Performance of Deformable Distributed Mems Phase Shifters

The invention discloses an electromechanical coupling prediction method for the performance of a deformed distributed MEMS phase shifter. The method comprises the steps of 1) determining structure parameters, material attributes and electromagnetic working parameters of a distributed MEMS phase shifter; 2) determining equivalent circuit parameters of the distributed MEMS phase shifter; 3) determining a working environment condition; 4) performing mechanical analysis on a structure and extracting a maximum offset after structure deformation; 5) calculating the value of a variable capacitor composed of each MEMS bridge and a transmission line after structure deformation; 6) establishing an electromechanical coupling model of each MEMS bridge and calculating phase-shift magnitude; 7) calculating the phase-shift magnitude; and 8) judging whether the phase-shift magnitude of the phase shifter meets a requirement or not. The electromechanical coupling model for the structure parameters and the phase-shift magnitude of the distributed MEMS phase shifter, established with the method, can directly analyze the influence of the structure parameters on the phase-shift magnitude of the phase shifter, and can be used for quantitatively evaluating the influence of the structure deformation on the phase-shift magnitude of the distributed MEMS phase shifter in a load environment so as to guide the design and optimization of the distributed MEMS phase shifter.
Owner:XIDIAN UNIV

Method and system for analyzing outlet/inlet section line capacity of urban railway system

The invention discloses a method and a system for analyzing the outlet / inlet section line capacity of an urban railway system. The method comprises the following steps of: (S1) determining line data, train data and signal system data and dividing a line into a plurality of intervals; (S2) simulating various tracking conditions in the running of trains according to the data and recording the time of all trains of clearing timing points to obtain the running time of the trains between the timing points; (S3) calculating outlet section traveling intervals under different tracking conditions according to a simulating result, calculating a final outlet section traveling interval according to the outlet section traveling intervals to obtain the outlet / inlet section line capacity of the trains, the reserved capacity and a station stopping time maximum value; and comparing the obtained parameters with running requirements as well as analyzing, and outputting a final analysis result. The method and the system improve the scientificity, the comprehensiveness and the accuracy of analyzing the outlet / inlet section line capacity, realize the automation of the analysis process of the outlet / inlet section line capacity and save the labor force.
Owner:TRAFFIC CONTROL TECH CO LTD
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