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305results about How to "Comprehensive consideration" patented technology
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Traffic jam avoiding prompting system based on collective intelligence network
ActiveCN103236163AImprove accuracyImprove reliabilityDetection of traffic movementMicrobloggingCollective intelligence
The invention provides a traffic jam avoiding prompting system based on a collective intelligence network. The traffic jam avoiding prompting system consists of a webpage traffic hot spot digging module, a microblog traffic hot spot digging module, a road condition rule predicting module, a jam hot spot verification and management module, a real-time traffic hot spot server, a traveling route planning module based on hot spot avoiding, a traffic hot spot and avoiding route display module and intelligent mobile phone end application software. The traffic jam avoiding prompting system faces the collective intelligence sensing network, is combined with the traditional traffic information sources, carries out digging and prediction on the urban traffic hot spots on the basis of the data activation technology, and further provides the traffic jam hot spot display and avoiding prompt service for intelligent terminal users. The traffic jam avoiding prompting system has the advantages that the data is from the multi-source collective intelligence network, the accuracy is good, the checking comprehensive rate is high, the hot spots are captured and fed back in real time, high efficiency and practicability are realized, the design is good, the operation is stable, the installation is convenient, the traffic jam avoiding prompting system can become a tool capable of providing wide and practical intelligent traffic information for urban residents, and the efficient information prompt is provided for the users to realize the smooth traveling.
Owner:BEIHANG UNIV
Method for modeling and error compensation of temperature drift of fiber optic gyroscope
ActiveCN102095419AComprehensive analysis to study the effects of temperature driftAnalyzing the effects of temperature driftSagnac effect gyrometersThermodynamicsFibre optic gyroscope
The invention discloses a method for modeling and error compensation of temperature drift of a fiber optic gyroscope, which comprises the following steps of: obtaining a learning sample and denoising the learning sample; establishing a fiber optic gyroscope temperature drift error compensation model based on temperature gradient; establishing a parameter formula based on a temperature change rate so as to determine the relations between the temperature change rate and various parameters of the fiber optic gyroscope temperature drift error compensation model; and subtracting a temperature drift compensation value, obtained by the fiber optic gyroscope temperature drift error compensation model, from the real-time output data of the fiber optic gyroscope to realize temperature compensation to the fiber optic gyroscope. The invention not only realizes modeling for the temperature drift of the fiber optic gyroscope in mechanism, but also simultaneously and greatly improves the convenience and accuracy of modeling, and has important significance to performance research and improvement of the fiber optic gyroscope in constantly variable temperature environments.
Owner:SOUTHEAST UNIV
Optimal site selection method and device for distributed wind power plant based on fuzzy analytic hierarchy process
InactiveCN102945507AComprehensive considerationConsistency is easyForecastingIndex systemDigital signal processor
An optimal site selection device for a distributed wind power plant based on a fuzzy analytic hierarchy process comprises a DSP (Digital Signal Processor) module, a keyboard input module, a liquid crystal display module, a communication module and a host computer. An optimal site selection method for the distributed wind power plant based on the fuzzy analytic hierarchy process comprises the following steps: dividing candidate wind energy resource zones in a region rich in wind energy resources, determining an evaluation index system for the site selection of the wind power plant, determining the hierarchical structure of a scheme for the site selection of the wind power plant, judging the cognition degrees of experts on selected sites for the wind power plant by an expert group judgment and group decision method to obtain the cognition degree parameters of all the experts, and constituting a criterion layer judgment matrix and an index layer judgment matrix for the site selection of the wind power plant; and finally ranking the candidate wind energy resource zones by advantages and disadvantages and determining one site for the wind power plant. Compared with the traditional analytic hierarchy process for site selection, the method has the advantages that factors are fully considered, the examination and the regulation of the consistency of the judgment matrixes are simple, easy, scientific and reasonable, and results are scientifically analyzed. The device has the advantages that through the operation processing process of the DSP, the site selection period can be shortened, and the site selection efficiency can be increased.
Owner:NORTHEASTERN UNIV
Regional building energy consumption predicting method
InactiveCN106524295AComprehensive considerationSmall amount of calculationMechanical apparatusSpace heating and ventilation safety systemsBuilding energySimulation
The invention discloses a regional building energy consumption predicting method. The regional building energy consumption predicting method comprises the steps of: S1, acquiring an annual energy consumption data sample set of buildings as data for building energy consumption prediction; S2, calculating cooling and heating loads of individual buildings, respectively, according to form of terminal air conditioners and heating equipment of the buildings; S3, calculating the energy consumption of cold and heat source related energy-consuming equipment of the buildings according to the cooling and heating loads of the individual buildings; S4, calculating the energy consumption of illumination equipment of the individual buildings; S5, calculating the energy consumption of electric equipment of the individual buildings; S6, calculating the energy consumption of power equipment of the individual buildings; S7, accumulating the energy consumption obtained in the steps S3, S4, S5 and S6 to obtain the annual energy consumption of the individual buildings; and S8, calculating the total energy consumption of all buildings in the region according to the annual energy consumption of the individual building. The method disclosed by the invention breaks through the limitation that for single building energy consumption prediction, an energy station is taken as a node, establishes an energy consumption predication calculating model of a building group in the region, and can provide a reliable ground for overall planning and management of regional energy sources.
Owner:BEIJING BUILDING TECH DEV
Method for predicting dynamic open-flow capacity of fractured horizontal wells for tight sandstone gas reservoirs
InactiveCN107301306AImprove reliabilityPracticalData processing applicationsDesign optimisation/simulationRock corePredictive methods
The invention relates to the field of gas field development research, in particular to a method for predicting dynamic open-flow capacity of fractured horizontal wells for tight sandstone gas reservoirs. The method includes coupling gas reservoirs, fracture and wellbores to obtain gas and liquid two-phase flow productivity equations for optional fracture locations of the fractured horizontal wells; building corresponding fractured horizontal well numerical models on the basis of reservoir stratum parameters and fracture parameters to obtain relation curves and fitting relational expressions of non-dimensional gas release boundaries and gas test time; computing gas release boundaries of the fractured horizontal wells at production phases by the aid of dynamic reserves inverse processes; solving the gas and liquid two-phase flow productivity equations on the basis of phase permeability curves obtained by rock core tests so as to obtain the dynamic open-flow capacity of the fractured horizontal wells at the different production phases. The method has the advantages that influence of difference of physical parameters of reservoir strata, change of the fracture parameters, difference of gas well open-flow test time, external fracturing fluid and movable water of formations on open-flow capacity is taken into consideration, accordingly, the open-flow capacity of the fractured horizontal wells at the different production phases can be predicted by the aid of the method, and the prediction practicality and reliability can be improved.
Owner:SINOPEC NORTH CHINA OIL & GAS CO
Simulation collocation method for oscillation disconnection device of power system
ActiveCN102570454AEasy to operateComprehensive considerationAc network circuit arrangementsCollocationPower grid
The invention relates to the field of power system stability research, in particular to a simulation collocation method for an oscillation disconnection device of a power system. The method comprises the steps: A. building a simulation data model; B. building a research failure set; C. performing simulation calculation of power grid stability after failure, obtaining out-of-step characteristics of a power grid, determining an oscillation center, and summarizing oscillation center moving laws; D. performing simulation calculation of acting characteristics of the oscillation disconnection device after the failure, and judging acting correctness of the oscillation disconnection device; E. putting forward a preliminary collocation scheme of the oscillation disconnection device; F. studying coordinating relations among stability control measures; and G. putting forward the final collocation scheme of the oscillation disconnection device by combination with the step C, the step D, the step E and the step F. The simulation collocation method has the advantages of being strong in maneuverability, comprehensive in considered factors and reasonable in scheme, and has high practical value and good market prospect.
Owner:STATE GRID CORP OF CHINA +2
Bus transfer identification method based on vehicle GPS and bus IC card data
ActiveCN105185105AImprove accuracyComprehensive response to travel characteristicsDetection of traffic movementWalking distanceArrival time
The invention discloses a bus transfer identification method based on vehicle GPS and bus IC card data, sequentially comprising the steps as follows: carrying out data fusion based on vehicle GPS and bus IC card data; extracting passenger bus travel data; acquiring a shortest path matrix of bus stops; identifying the get-on stop and the get-off stop; judging a transfer behavior based on the card swiping time interval; identifying the transfer behavior based on the walking distance for transfer; identifying the transfer behavior based on a transfer time threshold; and identifying the transfer behavior based on bus arrival time matching. The method of the invention takes comprehensive factors into consideration, is convenient in calculation and actual operation, is high in practicability, can greatly improve the convenience in and accuracy of bus transfer identification, and has a broad application prospect.
Owner:SOUTHEAST UNIV
Comprehensive evaluation index system of ship routing scheme and combined evaluation method thereof
InactiveCN101982830AImprove and improve accuracyEasy to optimizeData processing applicationsSafety indexShip routing
The invention provides a comprehensive evaluation index system of a ship routing scheme and a combined evaluation method thereof. The comprehensive evaluation index system comprises a quantitative index and a qualitative index, wherein, the quantitative index comprises an efficiency index and the qualitative index comprises a safety index and a performance index. The combined evaluation method comprises the following steps: determining a qualitative evaluation index value by a group decision making method; determining a quantitative index value of the scheme by an entropy method and a fuzzy analytic hierarchy process (FAHP); and realizing ordering and optimization of the scheme based on a technique for order preference by similarity to ideal solution (TOPSIS). Compared with the traditional comprehensive evaluation index system of the ship routing scheme and the evaluation method thereof, the comprehensive evaluation index system and the evaluation method thereof of the invention increase analysis evaluation of the quantitative index, thus the index system is more complete; and by combination of quantitative evaluation and qualitative evaluation, expert knowledge is integrated into the decision-making process preferably, thus being more practical and more flexible.
Owner:SHANGHAI MARITIME UNIVERSITY
Isolated grid operation stabilization control method for regional weak tie power grid
InactiveCN104201668AGuaranteed uptimeReduce load lossAc network circuit arrangementsPower gridLoad following power plant
The invention relates to an isolated grid operation stabilization control method based on a delivery manner of a regional weak tie power grid. The method is a dynamic simulation analyzing method based on tracks. According to a searching-verifying method and combining the voltage and frequency change tracks, the operating characteristics of the power grid under the condition of various delivery power are analyzed, the factors of the unit grid interfering protection of the regional power grid, the operating state change of the power grid, the over-speed protection of a generator unit, the high-week machine cutting measures of the regional power grid, linked machine cutting, low-frequency load decrease and the like are comprehensively considered, an isolated grid operation stabilization control strategy which is suitable for the delivery regional power grid for the requirements of the actual power grid is developed, and the second defense line and the third defense line of the regional power grid, and the over-speed protection allocation scheme of a generator are coordinated and optimized. Through the adoption of the stabilization control method, the isolated grid operation stabilization of the regional power grid can be ensured, the load loss can be reduced, the adaptability is better, the considered factors are more comprehensive, the certain practical value can be generated, and the promoted prospect is better.
Owner:CHINA SOUTHERN POWER GRID COMPANY +1
Neighboring area automatic optimization method and apparatus
ActiveCN104618937AImprove efficiencyImprove accuracyWireless communicationCell spaceUsers perceptions
The invention provides a neighboring area automatic optimization method and apparatus. The method includes the steps of determining a main serving cell and a list of candidate neighboring areas corresponding to the main serving cell; scoring every candidate cell on the list of the candidate neighboring areas according to candidate neighboring area switching data, candidate neighboring area measurement report data and / or candidate neighboring area cell spacing data; sorting the candidate cells on the list of the candidate neighboring areas according to the score of every candidate cell; selecting M candidate cells as neighboring areas corresponding to the main serving cell the from the list of the candidate neighboring areas according to sorting results, wherein M is the maximum number of needed neighboring areas of the main serving cell. The neighboring area automatic optimization method and apparatus takes the influence of the candidate neighboring area switching data, the candidate neighboring area measurement report data and / or the candidate neighboring area cell spacing data on neighboring area selection into comprehensive consideration, effectively improves the neighboring area optimization efficiency and accuracy and improves user perception.
Owner:SHANGHAI DATANG MOBILE COMM EQUIP +1
Multi-model fused house property evaluation method
InactiveCN107230113AImprove comparabilityImprove efficiencyProduct appraisalMathematical modelNetwork model
The present invention provides a real estate evaluation method with multi-model integration, which includes the following steps: determining the real estate price influencing factor; constructing a real estate transaction case database according to the determined real estate price influencing factor; obtaining real estate transaction cases in relevant areas through the real estate to be evaluated; screening the real estate data to obtain comparable transaction cases; quantify the housing price impact factors and calculate the weights of housing price impact factors; use set pair analysis model, VIKOR model, fuzzy mathematical model, and neural network model to calculate relevant parameters respectively; correct the time of real estate transaction cases, and estimate Property prices to be appraised. The present invention adopts spatial information technology to establish a real estate database, and based on this, constructs a precise quantification method for real estate valuation factors and a batch evaluation mode for real estate prices fused with multiple mathematical models, which overcomes the subjective nature of price influencing factors in traditional single-model valuation methods The problem of uniqueness and the singleness of the valuation model.
Owner:JIANGXI UNIV OF SCI & TECH
Optimal grouping configuration method of distributed generations and microgrid
ActiveCN104361403AComprehensive considerationFast convergenceEnergy industryForecastingStored energyMicrogrid
The invention provides an optimal grouping configuration method of distributed generations and a microgrid. The method includes the steps of establishing a multi-objective optimization model based on distributed generation and microgrid hybrid integrated supply; solving the multi-objective optimization model by means of a non-dominated genetic algorithm to allow optimal grouping configuration of the distributed generations and the microgrid. The multi-objective optimization model makes full consideration on investment cost, supply reliability and running grid loss and also considers constraints such as microgrid power balance, storage capacity configuration ratio, permeability, node voltage, distributed generation output and group number, complete factors are considered, and the problems in connection positions and volumes of the distributed generations, loads and stored energies can be effectively solved.
Owner:STATE GRID CORP OF CHINA +2
Camera calibration method based on improved distortion model
InactiveCN107507246AHigh precisionComprehensive considerationImage enhancementImage analysisDistortionLevenberg–Marquardt algorithm
The invention discloses a camera calibration method based on an improved distortion model. The method comprises the following steps: according to the transformation relationship between a world coordinate system and an image coordinate system, establishing a camera calibration model; according to orthogonal property of a matrix, obtaining a constraint equation of internal parameters of a camera; approximately calculating an initial value through a linear solution method, and then, calculating a homography matrix through a gradient method; according to the calculated constraint equation and the homography matrix, calculating camera model parameters; combining Zhengyou Zhang and Heikkila calibration models, changing solving order of the two ends of a distortion model equation according to radial distortion and tangential distortion, and calculating the initial value through a linear least square method; and carrying out optimization solution on the camera parameters through a Levenberg-Marquardt algorithm to obtain optimal camera parameters. The method realizes camera calibration and has the advantages of high calibration precision and easy implementation.
Owner:NANJING UNIV OF SCI & TECH
Electric vehicle remaining driving range estimation method and device, storage medium and equipment
ActiveCN111216730AMileage Anxiety EaseComprehensive considerationVehicular energy storageBattery/fuel cell control arrangementDriver/operatorElectrical battery
The invention discloses an electric vehicle remaining driving range estimation method and device, a storage medium and equipment, and belongs to the field of electric vehicles. The method comprises the following steps: acquiring the remaining available power of a battery in real time; acquiring unit mileage power consumption according to the road grade and congestion degree of a travel path and the driving style of a driver; and calculating the remaining driving range according to the remaining available power and unit mileage power consumption of the battery. The influence rule of the drivingstyle of the driver, the road grade of a planned travel and the real-time congestion degree of the road condition on the travel energy consumption is comprehensively analyzed, and the unit mileage power consumption in the driving process of the electric vehicle is quantitatively predicted. According to the invention, the remaining driving range estimation method fusing the pedestrian, vehicle androad information is adopted, and more comprehensive factors are considered, so that the remaining driving range of the electric vehicle can be calculated more accurately, and the mileage anxiety of auser can be relieved.
Owner:SHANDONG UNIV OF TECH +1
Spiral bevel gear tooth surface loading performance multi-objective optimization method
ActiveCN107577876AImprove loading effectAvoid broken teethSpecial data processing applicationsMathematical modelRooted tooth
The invention relates to a spiral bevel gear tooth surface loading performance multi-objective optimization method. The method is characterized by comprising the following steps that firstly, a mathematical model of a spiral bevel gear tooth surface loading performance multi-objective optimization problem is established, and test design sample points are obtained; secondly, a tooth surface loadingcontact analysis method considering tooth root bending stress is established, tooth surface loading contact analysis is conducted on the test design sample points, target functions corresponding to the test design sample points and response values of the target functions are obtained, and then an initial sample point set including the test design sample points and the corresponding response values is obtained; thirdly, a Kriging proxy model is fitted on the basis of the initial sample point set, the mathematical model of the spiral bevel gear tooth surface loading performance multi-objectiveoptimization problem is solved, and the optimal solution set of the spiral bevel gear tooth surface loading performance multi-objective optimization problem is obtained. The method is high in calculation efficiency, high in calculation accuracy and capable of being widely applied to spiral bevel gear tooth surface loading performance multi-objective optimization.
Owner:TSINGHUA UNIV +1
Road intersection queuing length calculation method
ActiveCN105679024AReal-time calculation of queue lengthComprehensive considerationDetection of traffic movementRoad crossingCalculation methods
The invention discloses a road intersection queuing length calculation method, and the method comprises the steps: 1, building a road intersection queuing length model: Lq=(Q2-Q1)*LC, and calculating the road intersection queuing length through the road intersection queuing length model; 2, carrying out the correction of the road intersection queuing length model through formula (1), wherein the formula (1) meets the formulas: (2), (3) and (4); 3, carrying out the accumulated error correction of the road intersection queuing length obtained at step 1 through the following method: (a), zero value correction: adjusting the road intersection queuing length to be zero if there is no vehicle passing by a detector I and a detector II in a certain time period and there is no vehicle staying between the two detectors I and II; (b), full value correction: adjusting the road intersection queuing length to be (L2-L1) if there is no vehicle passing by the detector I and the detector II in a certain time period and there are more vehicles staying between the two detectors I and II. The method can calculate the road intersection queuing length in real time through iterative computation.
Owner:苏州六头牛信息科技有限公司
Grid-connected microgrid reliability evaluation method considering peak load shifting
The invention relates to a grid-connected microgrid reliability evaluation method considering peak load shifting. The method includes the following steps that: the fuzzy membership degree of a peak period and a valley period is set according to the load curve of a power system; the fuzzy similarity matrix R and equivalence matrix R<^> of various time points of the load curve are determined, dynamic clustering is carried out through a lambda-cut relation, so that the division of the peak period and the valley period can be realized; adjustment is made according to the order of the power market and the actual electricity consumption demands of people, so that a corrected typical load peak period, normal period and valley period can be obtained; a load demand response model is established according to three constraint elements, namely, the total electricity consumption of loads, electricity price and customer' satisfaction, and an objective function described in the descriptions of the invention is provided, and a solution can be obtained through using a particle swarm algorithm, and a corrected load curve is determined; and the reliability of a corrected load curve-based grid-connected microgrid is determined through using a Monte Carlo simulation method. The method of the invention has the advantages of great universality and simple algorithm interface.
Owner:CHONGQING UNIV
Parameter matching method for dual mode power shunt hybrid power system
ActiveCN108466544ASolving Parametric Design ProblemsMatching method is simpleGeometric CADGas pressure propulsion mountingHybrid systemDual mode
The invention provides a parameter matching method for a dual mode power shunt hybrid power system, and the parameter design problem of the dual mode power shunt hybrid power system is solved. The method includes the following steps that, firstly, a lever model of the dual mode power shunt hybrid system is established, and efficiency characteristics and switching conditions in different modes of the system are obtained; then the dynamic performance index, the cycle driving condition, the mode switching condition, and the basic control idea are comprehensively considered, and the type selectiondesign of an engine, a motor and a battery is carried out in turn; and finally, simulation calculation is carried out by using the forward simulation model to verify the dynamic performance and economic performance of a whole vehicle. The matching method is simple and effective, saves the preliminary matching cost, shortens the development cycle, and significantly improves the dynamic performanceand economic performance of the whole vehicle.
Owner:JILIN UNIV
Experimental device and method for simulating single-crack flowback after shale gas fracturing
InactiveCN105301192AComprehensive considerationCoring is simplePermeability/surface area analysisShale gasProduction rate
The invention relates to an experimental device and method for simulating single-crack flowback after shale gas fracturing. The experimental device is mainly composed of a pump set, a device body, a hydraulic pressure and temperature control device, and a tail monitoring and liquid waste disposal device. The device body mainly refers to an improved rock core clamp holder specially used for manufacturing a rock core, confining pressure is applied through the hydraulic pressure device, and the temperature control device heats hydraulic oil to form a high temperature for simulation of the stratum environment; in the experimental process, displacement meters on the upper side face and the lower side face of the rock core clamp holder can detect crack displacement change, and the sand production rate and the fluid flow speed can be monitored in real time through the tail monitoring device. By the adoption of the experimental device and method, the stratum high-temperature and high-pressure environment can be simulated, and on the premise that the flow conductivity of cracks of different crack lengths and crack widths is detected, the crack pressure drop, the sand production rate, the propping agent embedding degree and the propping agent backflow and settlement rule are detected; moreover, artificial marble rock cores are used, and the environment gets more close to the true stratum environment compared with the mode that steel blocks are used for simulating cracks.
Owner:SOUTHWEST PETROLEUM UNIV
Talent ability depicting method based on scientific research accomplishment data
The invention discloses a talent ability depicting method based on scientific research accomplishment data and belongs to the data mining field. The method comprises steps that paper ability of all the talents is acquired through calculation based on quality, the publication time, the author order and the reference information of papers published by the talents; based on acceptance states, the application time and the inventor ordering information of application patents, patent ability of all the patents is acquired through calculation; based on the class, the grade, project fund, the accomplishment time and the project personnel ordering information of accomplished projects, project ability of all the talents is acquired through calculation; based on achievements in recent years, the active degree of all the talents is acquired through calculation; based on projection and patent enforcement situations, the practice degree of all the talents is acquired through calculation; and normalization is carried out according to the calculation results of the five aspects, and radar map visual expression is further realized. The method is advantaged in that talent scientific research ability figure construction and visualization are realized according to the scientific research accomplishment database, and the general scientific research ability situations of the talents can be rapidly and visually mastered.
Owner:HANGZHOU DIANZI UNIV
Data storage method and apparatus used for cloud storage environment
ActiveCN108287666AComprehensive considerationInput/output to record carriersData matchingMemory footprint
The invention provides a data storage method and apparatus used for a cloud storage environment, and relates to the technical field of cloud storage. The method comprises the steps of determining values corresponding to storage influence factors according to to-be-stored data, current storage nodes and a network environment when the to-be-stored data is received, wherein the storage influence factors include a data quantity of the to-be-stored data, transmission distances between the to-be-stored data and the storage nodes, fault rates of the storage nodes, residual spaces of the storage nodes, memory occupation rates of the storage nodes, and network bandwidths corresponding to the storage nodes or network delays corresponding to the storage nodes; and according to the values corresponding to the storage influence factors, determining the optimal storage nodes matched with the to-be-stored data, thereby correspondingly storing the to-be-stored data in the optimal storage nodes. The storage nodes can be reasonably matched for the to-be-stored data based on multi-factor consideration, so that a relatively good data storage scheme is provided.
Owner:CHINESE PEOPLE'S PUBLIC SECURITY UNIVERSITY
Simulation configuration method for constant-value parameter of frequency control device in weak interconnection power grid
ActiveCN103390081AResolution frequencySolve the oscillation frequencyData processing applicationsAerodynamics improvementWater turbineLow voltage
The invention provides a simulation configuration method for constant-value parameters of frequency control devices in weak interconnection power grids. According to the characteristics that the frequency changes quickly and the amplitude is large after an isolated grid runs due to a reason that the weak interconnection power grids are serially faulted, acting characteristics of frequency control devices such as a primary frequency modulation control device of a steam turbine generator set, a primary frequency modulation control device of a water turbine generator set, a steam turbine overspeed protection control device, a high-frequency generator tripping safety automatic device, a low-frequency load shedding safety automatic device and a low-voltage load shedding safety automatic device are comprehensively considered from two aspects, i.e. isolated grid frequency decrease and increase. A scientific and reasonable simulation configuration method for the constant-value parameters of the frequency control devices in the weak interconnection power grids is made and has the advantages of high applicability, comprehensive considered factors, reasonable scheme and the like.
Owner:STATE GRID CORP OF CHINA +2
Checking method and system of high-cycle cutting machine configuration scheme
ActiveCN105391050AHigh utility valueComprehensive considerationAc network circuit arrangementsGrid faultAsynchronous operation
The present invention provides a checking method and system of a high-cycle cutting machine configuration scheme of a multi-DC feed asynchronous operation grid. According to the checking method, through using simulation model simulation, the condition of a grid system after a fault in a forecast fault set happens is calculated to obtain a simulation calculation result, the forecast fault set comprises a traditional grid external feed section breaking fault and also comprises the influence of a non-synchronous operation grid fault on a researched grid frequency, and the high-cycle cutting machine configuration scheme can be checked and corrected so as to obtain a scheme which satisfies a configured multi-DC feed asynchronous operation grid operation requirement. According to the checking method of the high-cycle cutting machine configuration scheme of the multi-DC feed asynchronous operation grid, the factor consideration is comprehensive, the operability is strong, the practical value is high, and the market prospect is good.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Bridge hanging basket construction risk assessment method based on fuzzy analytic hierarchy process
InactiveCN110580580AReduce incidenceSimple designResourcesComplex mathematical operationsHanging basketCvd risk
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Spiral bevel gear tooth surface loading performance optimizing method capable of considering tooth root bending strength
ActiveCN107133405AComprehensive considerationImprove computing efficiencyGeometric CADDesign optimisation/simulationEngineeringUltimate tensile strength
The invention relates to a spiral bevel gear tooth surface loading performance optimizing method capable of considering tooth root bending strength. The method comprises the following steps: 1) building a spiral bevel gear tooth surface loading performance optimizing model capable of considering the tooth root bending strength; 2) building a tooth surface loading contact analysis method capable of considering a tooth root bending stress; and 3) a Kriging agent model of the tooth surface loading optimizing problem and performing optimization solution. The method is capable of firstly considering the tooth root bending stress in the optimizing model, secondly introducing a Kriging agent modeling method in order to solve the problem of large calculation amount, building the agent model of the tooth surface loading performance optimizing problem, and using the agent model to obtain the optimal solution. The obtained tooth surface optimizing result is capable of considering the tooth root bending stress, and the considered factors are more comprehensive.
Owner:TSINGHUA UNIV +1
Crop virtual breeding method based on plant function and structure model
ActiveCN104965997ARealize simulationComprehensive considerationSpecial data processing applicationsPlant genotype modificationData setOriginal data
A crop virtual breeding method based on a plant function and structure model. The method combines a physiological and structural crop virtual growth model and quantitative genetic information, fulfills the aim of carrying out virtual breeding by simulating the growth and development process and the propagation process of crops and comprises the steps of: acquiring physiological data, morphological data, quantitative genetic data and growth environment data of the crops to construct an original data set; based on original data, constructing the crop function and structure model by a computer graphics method and a crop ecology principle; constructing a genetic module which comprises the quantitative genetic information and establishing association from the quantitative genetic information to related model parameters; adding simulation on genetic operations of crossing, recombination and the like in the hybridization process and implementing simulation on the propagation process of the crops; and implementing virtual breeding by selection and hybridization on individuals in the model. By providing the crop virtual breeding method based on the plant function and structure model, virtual breeding of the crops can be implemented by a computer technology so as to provide assistance and support for a conventional breeding progress.
Owner:ZHEJIANG UNIV OF TECH
Large-scale wind power-containing power transmission network planning system considering risks
ActiveCN105226651AComprehensive considerationControl investment costsForecastingSpecial data processing applicationsElectricityPower equipment
The invention relates to a large-scale wind power-containing power transmission network planning system considering risks. The large-scale wind power-containing power transmission network planning system comprises a database module, an input module, an analysis module, a planning module and an output module, wherein the database module is used for storing wind speed data, load data and power equipment data; the input module is used for acquiring required data from the database module and the outside of the system; the analysis module is used for calculating an economic risk index, a technical risk index and investment cost of a planning scheme according to the input data and acquiring security constraint conditions of a power transmission network; the planning module is used for building a power transmission network planning model, determining the power transmission network planning model according to the economic risk index, the technical risk index, the investment cost and the security constraint conditions of the power transmission network, obtained by the analysis module, and acquiring the power transmission network planning result considering the economic risk and the technical risk; and the output module is used for outputting the power transmission network planning result. Compared with the prior art, the risks caused by wind farm output uncertainty can be lowered when the investment cost is controlled; and the large-scale wind power-containing power transmission network planning system has the advantages of high efficiency, comprehensive factor consideration and the like.
Owner:STATE GRID CORP OF CHINA +3
Strip steel red rust defect detection method based on artificial intelligence
PendingCN113554629AComprehensive considerationAccurate predictionImage enhancementImage analysisContrast levelAlgorithm
The invention relates to a strip steel red rust defect detection method based on artificial intelligence, and the method comprises the steps: collecting an RGB image of strip steel, removing a background, obtaining a region of interest of the image, carrying out the graying processing of the region of interest, obtaining the gray-scale maps of channels R, G and B, extracting the texture features of the channel R through a gray-scale co-occurrence matrix method, obtaining a gray-scale map quality index of a channel, obtaining a gray-scale difference map of the channel at the same time, obtaining a red rust gray-scale feature map of a single channel according to the gray-scale map quality index and the gray-scale difference map, clustering pixel points of the feature map to obtain a connected domain, and obtaining an area and a contrast feature mean value of the connected domain; forming a feature matrix by the area, the contrast feature mean value and the value of the corresponding pixel point, taking the feature matrix as the input of a classifier, and outputting the defect degree of the red rust grey-scale map. According to the method, the feature map reflecting the red rust defect can be more accurately obtained, and then the red rust defect prediction is more accurate.
Owner:江苏苏桥焊材有限公司
Preparation method of low-residual-stress copper film
InactiveCN102851645AImprove membrane qualityImprove performanceVacuum evaporation coatingSputtering coatingRadio frequency magnetron sputteringRadio frequency sputtering
The invention relates to preparation technology of a metal film, and discloses a new simple and convenient preparation method of a copper film. The invention effectively controls the magnitude of residual stress generated in the preparation process, thereby implementing preparation of the low-residual-stress copper film material. The method is applied to a magnetron sputtering coating device, and adopts radio-frequency magnetron sputtering to prepare the copper film. The magnetron sputtering coating device is provided with a magnetron sputtering chamber, and a magnetron sputtering target is arranged in the magnetron sputtering chamber. The method comprises the following steps: a. pretreating a substrate; b. putting the pretreated substrate in the magnetron sputtering chamber; c. vacuumizing the magnetron sputtering chamber; d. introducing high-purity argon into the magnetron sputtering chamber; e. regulating the radio-frequency sputtering power and gas pressure, and sputtering the magnetron sputtering target to form the copper film on the substrate; and f. after cooling the magnetron sputtering chamber, taking out the copper film sample, and carrying out residual stress testing.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
On-line monitoring area inaccurate rate calculation method, equipment and medium
ActiveCN110531304AReduce the impactAccurate misalignment rateElectrical measurementsSmart meterComputer science
The invention discloses an on-line monitoring area inaccurate rate calculation method, equipment and a medium. The method comprises steps as follows: S1, acquiring time-point electric quantity data ofeach user meter under a master meter in an area online; S2, verifying whether acquired electric quantity data of the master meter in the area are 0, determining that the master meter is not used or the master meter fails if the electric quantity data of the master meter in the area are 0, and performing further calculation if the electric quantity data of the master meter in the area are not 0; S3, calculating error rates of each user meter, line loss rate of the area and fixed loss of the area according to a prototype flow conservation formula of a data application electric energy meter error rate model acquired online; and S4, calculating the error rate of the master meter by use of a correction model, and correcting the error rates of each user meter, the line loss rate of the area andthe fixed loss of the area. With the implementation of the method, for online monitoring calculation of the inaccurate rate of an intelligent electric meter, considering factors for calculation of the inaccurate rate are richer, output of result amount is increased, and the result is more reliable and accurate.
Owner:SHENZHEN POWER SUPPLY BUREAU
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