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35results about How to "Improve computing reliability" patented technology
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Focal position determining method, focal position determining apparatus, feeble light detecting apparatus and feeble light detecting method
InactiveCN101278190AEasy and simple decisionEasy decisionMicroscopesFluorescence/phosphorescenceDigital zoomMagnification
It is possible to provide a focal point position deciding method, a focal point position deciding device, and others capable of deciding a focal point position of an objective lens appropriate for an observation object portion at the stage when a sample is set for light-emission observation of the observation object portion which is a particular portion in the sample. Light is applied to the sample; the focal point position of the objective lens is modified, the modified focal point position is measured; the sample to which light is applied at the modified focal point position is imaged; a characteristic amount is calculated according to the captured image; modification of the focal point position, measurement of the focal point position, imaging of the sample, and calculation of the characteristic amount are repeatedly executed; at least one focal point position is selected from a plurality of focal; point positions accumulated by the execution according to a plurality of characteristic amounts accumulated by the execution; and a focal point position of the objective lens appropriate for the observation object portion in the sample is decided according to the selected focal pointposition. The focal point position of the objective lens is decided and digital zoom and optical zoom are performed so that the captured image is magnified with a desired magnification for display.
Owner:OLYMPUS CORP
Power battery temperature prediction model based on liquid cooling heat dissipation mode and modeling method
PendingCN111191366AReduce complexitySimplify input parametersDesign optimisation/simulationPower batteryThermodynamics
The invention discloses a power battery temperature prediction model based on a liquid cooling heat dissipation mode and a modeling method. The change relation of equivalent heat dissipation parameters between the battery and the cooling liquid along with the flow and the equivalent heat dissipation parameters between the battery and the air are calibrated through tests and the calibration resultis calibrated, and the change relationship between the battery internal resistance and the entropy thermal coefficient representing the reversible heat of the battery along with the SOC, the temperature and other factors are considered so as to establish a prediction model capable of predicting the temperatures of the battery cells at different positions in the battery pack in different thermal management stages. The model established according to the method can be used for real-time estimation and thermal management control of the temperature of the single battery in the liquid-cooled power battery pack and can expand the application range of the model, reduce the complexity of the model, simplify the input parameters of the model and improve the reliability of model operation on the basis of ensuring the simulation precision.
Owner:CHINA FIRST AUTOMOBILE
Geometrical model establishing methodand dose calculation method based on medical image data
PendingCN109308733AImprove accuracy and precisionImprove computing reliabilityX-ray/gamma-ray/particle-irradiation therapy3D modellingMedical imaging dataVolumetric Mass Density
The invention provides a method for establishing a geometric model based on medical image data, comprising the steps of: inputting or reading medical image data; defining organization type and densityinformation; The step of giving 10B concentration information based on the measured overall 10B concentration spatial or temporal distribution; Establishing a 3D encoding matrix with tissue type, density and 10B concentration information; Steps to generate a geometric model. Another aspect of the present invention provides a dose calculation method based on medical image data, comprising the steps of calculating a 10B dose (DB), a neutron dose (DN), and a photon dose (D gamma) of the obtained geometric model according to a Monte Carlo method; The step of calculating a dose to tumor and tissuebased on the measured spatial or temporal distribution of the overall 10B concentration (Bcon). The geometric model building method based on medical image data of the invention can improve the accuracy and precision of the lattice information in the model. The dose calculation method based on the geometrical model can improve the reliability of dose calculation to improve the quality of treatment.
Owner:NEUBORON MEDTECH
Big data credibility measurement method based on layering model
InactiveCN105843829AImprove computing reliabilityWeb data indexingSpecial data processing applicationsTrusted ComputingData source
The invention pertains to the field of data credibility assessment of big data, in particular to a big data credibility measurement method based on a layering model. The method comprises following steps: calculating credibility of data sources and credibility of data on the basis of a conventional data creditability analysis theory by adding weight parameters such as a time factor and a penalty factor and dynamically creating a credible analysis network for layered big data. Compared with a conventional model, the big data credibility measurement method helps overcome the problem of a conventional credible analysis method including inadaptability of credible calculations of big data such that the factor of affecting credibility of big data from a more comprehensive level is analyzed. In the meanwhile, more accurate analyses can be made to credibility measurement of data provided with more data amount provided by data sources such that the credible requirement of big data can be well satisfied.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Multi-source data fusion collecting device and system
ActiveCN109298670AHigh precisionImprove computing reliabilityProgramme controlComputer controlInductorInformation transfer
The invention relates to a multi-source data fusion collecting device and system. The device comprises an information collecting module used for sampling a mutual inductor set for sensing a to-be-detected target to obtain first sampling data and second sampling data, and sampling a pulse signal of the to-be-detected target to obtain pulse sampling data, an information processing module used for processing the first sampling data and the second sampling data to obtain a first sampling value, first general information, a second sampling value and second general information, and processing the first sampling value, the second sampling value and the pulse sampling data to obtain monitoring information, and an information transmission module used for transmitting one or more of the first general information, the second general information and the monitoring information to a multi-source data fusion protecting device, a stabilization device and an automatic device. According to the device and the system provided by the invention, the precision and the calculation reliability of the sampling data are high; and the management and control obstruction is reduced, so that stable and reliableoperation of an intelligent substation is facilitated.
Owner:BEIJING SIFANG JIBAO AUTOMATION +2
Diffuse reflection light source system for visual inspection and design method
ActiveCN110596122AImprove uniformity of illuminationQuality improvementOptically investigating flaws/contaminationImaging qualityDiffuse reflection
The invention discloses a diffuse reflection light source system for visual inspection and a design method. The diffuse reflection light source system can calculate the shape of a diffuse reflection curved surface according to the size of a target illumination region, and effectively improve the illumination uniformity of the target region. On the basis of a rectangular array light source, illuminance distribution of a reflection curved surface is solved, light intensity distribution of the reflection surface is obtained according to an energy conservation principle, an illuminance distribution formula of a target surface is obtained, and coordinates of a series of discrete points on the reflection curved surface are solved to obtain the reflection curved surface. The diffuse reflection light source system has sufficient theoretical basis, the mathematical modeling is simple and practical, the calculation reliability is high, a light source system set up according to the optimal structure parameters has the advantages of being uniform in illumination, high in energy utilization rate, free of shielding a lens and the like, the imaging quality of a target object in visual detection can be effectively improved, and the diffuse reflection light source system has important practical significance in improving the detection precision.
Owner:CENT SOUTH UNIV
Blocking net working state monitoring and early warning method in combination of computational mechanics and field monitoring
InactiveCN108007499AImprove computing reliabilityDetermining working failure limitsMeasurement devicesDesign standardPull force
The invention provides a blocking net working state monitoring and early warning method in combination of computational mechanics and field monitoring, which belongs to the technical field of blockingnet working state monitoring. Through port engineering design standards, various loads in the blocking net working environment are classified, various load applied to the blocking net are converted to a main rope of the blocking net. Through the computational mechanics method, the main rope of the blocking net after load conversion is subjected to iterative solution, geometric constraint conditions of the main rope of the blocking net are introduced, the tensioning shape of the main rope of the blocking net under effects of various single environment loads or a combined environment load of the blocking net can be solved and the pulling force at a concerned place is solved. Historical monitoring data of each section of the blocking net are selected for comparison and analysis, the workingstrength limit of the blocking net system under effects of various loads is determined, the blocking net system working reliability safety grade is divided, the alarming value and the risk matrix of each section of the blocking net are determined, early warning on the blocking net working state is realized, and a basis is provided for reasonable maintenance on the blocking net.
Owner:DALIAN UNIV OF TECH
Smooth geometrical model establishing method based on medical image data
ActiveCN108310677AImproved stepped profileImprove computing reliabilityImage enhancementInformaticsTreatment qualityProsthesis
The invention provides a smooth geometrical model establishing method based on medical image data, which comprises the following steps: inputting or reading the medical image data; establishing a three-dimensional medical image voxel model according to the medical image data; smoothing the three-dimensional medical image voxel model; and establishing a three-dimensional voxel prosthesis tissue model. The invention also provides another smooth geometrical model establishing method based on the medical image data, which comprises the following steps: inputting or reading the medical image data;establishing the three-dimensional voxel prosthesis tissue model according to the medical image data; and smoothing the three-dimensional voxel prosthesis tissue model. The smooth geometrical model establishing method provided by the invention is used for smoothing the three-dimensional medical image voxel model or the three-dimensional voxel prosthesis tissue model so as to be closer to the realsituations of human organs, thereby improving the dose calculation reliability to promote the treatment quality.
Owner:NEUBORON MEDTECH
Method and system for simulating motion trail of solid inclusions in molten steel
ActiveCN111950137ATo promote floatingImprove cleanlinessDesign optimisation/simulationSpecial data processing applicationsData callEngineering
The invention belongs to the field of metallurgical industry, and particularly relates to a method and a system for simulating a motion trail of solid inclusions in molten steel. The system comprisesan inclusion initial state data storage module, a flow field data calling module, an inclusion stress calculation module, an inclusion motion trail calculation module, a calculation result storage module and a control module. The method comprises the following steps of calculating by initial state data of inclusions, the circular flow field data calling module, the inclusion stress calculation module and the inclusion motion trail calculation module in a circulating manner and simulating the motion trail of the solid inclusion in molten steel.
Owner:UNIV OF SCI & TECH BEIJING
Vehicle rear-end data monitoring platform for Internet-of-Vehicles system
PendingCN111698305AImprove computing reliabilityDetection of traffic movementTransmissionSimulationEvent data
The invention relates to the field of Internet of Vehicles, in particular to a vehicle rear-end data monitoring platform for an Internet-of-Vehicles system. A method for determining confidence and / orpriority of reported event data reported by a vehicle in an Internet-of-Vehicles system (1) is provided, the method at least comprises the steps of obtaining an event risk degree parameter corresponding to a reported event type, obtaining a historical traffic flow speed at a corresponding geographic position based on the reported geographic position, and then obtaining a speed deviation parameterbased on a deviation between a vehicle speed at a reporting moment and the historical traffic flow speed; and determining the confidence and / or priority of the reported event data at least based on the event risk parameter and the speed deviation parameter. The method may also include determining a frequency parameter based at least on the same or similar event reporting frequencies at the respective geographic locations and taking into account the frequency parameter when determining a confidence and / or priority of the reported event data. The calculation reliability of the confidence coefficient and / or priority of the vehicle report event can be improved.
Owner:DAIMLER AG
Transient safety analysis method for one-dimensional lead-based system
ActiveCN114023478AAchieving a modular designEnabling 1D Oxidation Corrosion AnalysisNuclear energy generationComputer implemented nuclear controlEngineeringComputational physics
The invention discloses a transient safety analysis method for a one-dimensional lead-based system. The method mainly comprises the following steps: 1, determining an organization structure of the lead-based system and component parameters of each component forming a rack according to an input file, and setting calculation time and time step length; 2, carrying out system initialization calculation to obtain an initial value at zero time; and 3, calculating the flow field, the temperature field and the pressure length at the current t moment by adopting a Gille algorithm; 4, according to a calculation result in the step 3, performing calculation at the next moment by adopting a Gille algorithm, and stopping calculation until the set total calculation time; 5, if the calculation reaches the specified time, ending the calculation; and 6, calculating distribution of oxygen concentration, iron concentration and oxide layer concentration in the rack by adopting a quasi-steady-state method according to calculation results obtained in the steps 1-5. According to the method, the steady-state thermal hydraulic characteristics of the lead-bismuth fast reactor or the lead-based system and the transient corresponding characteristics under the accident condition can be analyzed, and suggestions and guidance are provided for promoting design and safety characteristic analysis of the lead-bismuth fast reactor.
Owner:XI AN JIAOTONG UNIV
4S store potential customer behavior analysis system based on Reid and face recognition technology
InactiveCN112347907AImprove computing reliabilityEfficient removalImage enhancementImage analysisVideo streamingEngineering
The invention provides a 4S store potential customer behavior analysis system based on a Reid and face recognition technology, and the system comprises the following steps: (1), decoding a video stream from video monitoring, and extracting a picture frame at regular time; (2), performing pedestrian detection on the picture frame to obtain a pedestrian human body picture; (3) calculating pedestrianpictures by using a Reid model, and extracting pedestrian feature vectors; (4) storing the data in the step (3) into a database, including picture shooting time and camera numbers; (5), screening human body trajectory data associated with a human face so as to know trajectory behavior data of a corresponding customer; for each subsequent picture frame, calculating a pedestrian feature vector, andjudging whether the pedestrian appears before or not; the passenger flow calculation reliability is higher, the data is more complete, and the repeated passenger flow can be effectively removed. Datais collected in a non-inductive mode, customer behaviors are not intervened, and the experience feeling is good.
Owner:上海蜂雀网络科技有限公司
MEMS (Micro Electro Mechanical System) temperature compensation operation circuit
InactiveCN104317550AReduce areaImprove computing reliabilityDigital data processing detailsBinary multiplierEngineering
The invention relates to an MEMS (Micro Electro Mechanical System) temperature compensation operation circuit which comprises a multiplier, a summator and a storage unit. A temperature compensation and operation method adopted by the MEMS temperature compensation operation circuit comprises the following steps: (1), decomposing a binary five-order polynomial into a loop operation of addition before multiplication, to be specific, calculating each decomposed coefficient through the multiplier and the summator and storing all the coefficients in the storage unit; and (2) operating the binary five-order polynomial through the multiplier and the summator according to the decomposing process of the binary five-order polynomial and outputting an operation result. According to the operation circuit disclosed by the invention, the operation of a multielement high-order polynomial can be realized by the loop operation of the multiplier and the summator, the circuit area can be greatly saved, the operation reliability can be improved and the power consumption and cost are reduced.
Owner:SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
Method for electric power system carbon-flow simulation analysis adapted to large-scale power grid
ActiveCN106055730ACalculation speedImprove computing reliabilityTechnology managementDesign optimisation/simulationElectric power systemPower grid
The invention relates to a method for electric power system carbon-flow simulation analysis adapted to a large-scale power grid. The method comprises the steps of (1) power grid carbon-flow simulation and (2) power grid carbon-flow analysis. The method provided by the invention is characterized in that in combination with characteristics of the actual large-scale power grid and demands of the power grid simulation analysis, the complete and practical large-scale power grid carbon-flow simulation method is given; a power grid carbon-flow analysis method is also proposed; processing is carried out on the basis of carbon-flow simulation results; and a carbon-flow simulation analysis result which can be comprehensively applied by actual power grid simulation workers and can guide production practice is obtained.
Owner:CHINA ELECTRIC POWER RES INST +2
Lamp panel punching die of automobile headlamp
ActiveCN111716443AGuaranteed stabilityImprove work efficiencyMetal working apparatusVibration suppression adjustmentsStructural engineeringMechanical engineering
The invention discloses a lamp panel punching die of an automobile headlamp. The punching die further comprises a supporting plate, a left punch needle assembly, a right punch needle assembly and an automatic driving device, wherein the supporting plate is arranged in the middle of the upper end of an upper die plate; the left punch needle assembly and the right punch needle assembly are both movably arranged on the upper die plate, the left punch needle assembly comprises a hitting rod and a left punch needle which are connected with each other, the right punch needle assembly comprises a hitting rod and a right punch needle which are connected with each other, and the left punch needle and the right punch needle are located at the left side and the right side of the supporting plate respectively; and the automatic driving device is arranged on the upper die plate and used for driving the left punch needle assembly and the right punch needle assembly to punch holes in a workpiece on the supporting plate. According to the lamp panel punching die of the automobile headlamp, under the driving of the automatic driving device, the left punch needle assembly and the right punch needle assembly are driven to punch holes in the workpiece on the supporting plate, a manual punching mode is replaced, time and labor are saved, and the working efficiency of the punching die is improved.
Owner:烟台三维汽车配件有限公司
Seaborne boundary condition simulation method for FLNG device liquidation process
ActiveCN107463754AEffective assessmentReduce computing timeDesign optimisation/simulationSpecial data processing applicationsProcess dynamicsProcess systems
The invention relates to a seaborne boundary condition simulation method for an FLNG device liquidation process. The method is characterized by comprising the following steps of: (1) establishing a three-dimensional control volume unit, working mediums of which flow in an FLNG liquidation process system, under a sea condition, and carrying out analysis to obtain a momentum equation of working medium flow directions; (2) obtaining a three-dimensional motion equation of a hull or a platform on the basis of sea condition basic data of an actual operation sea area; (3) carrying out calculation to obtain a translational motion equation and an angular motion equation of working medium gravity centers; (4) establishing a one-dimensional fluid flow equation for representing flow, in the FLNG liquidation process system, of the working mediums under the actual sea condition; and (5) calculating sea condition boundary condition parameters according to the one-dimensional fluid flow equation, and loading the sea condition boundary condition parameters into a FLNG device liquidation process dynamic model so as to realize application of actual sea condition environment to FLNG device liquidation process. The method can be widely used for improving the simulation facticity and emergency working condition prediction correctness of the FLNG device liquidation process.
Owner:CHINA NAT OFFSHORE OIL CORP +1
A method for estimating the grounding electrode resistance of direct current transmission system by using the average value
ActiveCN103487657BEasy to implement on siteImprove computing reliabilityResistance/reactance/impedenceElectrical resistance and conductanceElectric power system
Owner:KUNMING UNIV OF SCI & TECH +1
Multi-source data fusion acquisition device and system
ActiveCN109298670BHigh precisionImprove computing reliabilityProgramme controlComputer controlInformation processingInformation transmission
The invention relates to a multi-source data fusion collecting device and system. The device comprises an information collecting module used for sampling a mutual inductor set for sensing a to-be-detected target to obtain first sampling data and second sampling data, and sampling a pulse signal of the to-be-detected target to obtain pulse sampling data, an information processing module used for processing the first sampling data and the second sampling data to obtain a first sampling value, first general information, a second sampling value and second general information, and processing the first sampling value, the second sampling value and the pulse sampling data to obtain monitoring information, and an information transmission module used for transmitting one or more of the first general information, the second general information and the monitoring information to a multi-source data fusion protecting device, a stabilization device and an automatic device. According to the device and the system provided by the invention, the precision and the calculation reliability of the sampling data are high; and the management and control obstruction is reduced, so that stable and reliableoperation of an intelligent substation is facilitated.
Owner:BEIJING SIFANG JIBAO AUTOMATION +2
A Transformer Winding Hot Spot Temperature Prediction and Evaluation System with Adaptive Function
ActiveCN103698033BTrue restorationImprove computing reliabilityThermometers using electric/magnetic elementsThermometers using physical/chemical changesTransformerPower grid
The invention discloses a transformer winding hot spot temperature prediction and evaluation system with an self-adaptive function, which mainly includes seven parts such as a transformer top layer oil temperature monitoring system, a substation environment temperature monitoring system, and transformer load current monitoring equipment. The system can monitor the temperature change trend after the load of the transformer is increased, and accurately know the coil temperature of the transformer in real time and predict its temperature change trend. By making full use of the transformer equipment, the temperature effect after the load increase can be measured without damaging the transformer. In the case of equipment insulation performance, it provides an evaluation method for the feasibility of overload operation of the power grid system during peak hours.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
Construction method of large-scale NCS fault-tolerant framework based on fixed-size memristor array
PendingCN111539522AImprove computing reliabilityExtended run timePhysical realisationComplex mathematical operationsAlgorithmIntegrated design
The invention discloses a construction method of a large-scale NCS fault-tolerant framework based on a fixed-size memristor array. The calculation reliability of the neuromorphic calculation system isimproved, the running time of the framework algorithm is accelerated, the scale of the neural network capable of being processed by the system is greatly improved, meanwhile, the resource consumptionof the memristor array is reduced, and subsequent universal integrated design is more convenient by adopting the memristor array with the fixed size.
Owner:UNIV OF SCI & TECH OF CHINA
Lithium battery SOC estimation model based on square root extended Kalman filter
ActiveCN112255545BImprove applicabilityCalculation Divergence ImplementationElectrical testingDesign optimisation/simulationHemt circuitsComputational physics
The invention relates to a method for estimating the SOC of a square root extended Kalman, which is characterized in that the Kalman filter can be applied to the SOC of a lithium-ion battery pack with an obvious nonlinear relationship by obtaining the Jacobian matrix on the basis of the Kalman filter algorithm. Estimation, realizes the effective iterative calculation of the SOC value of the lithium-ion battery pack, overcomes the cumulative error of the SOC initial value error and the ampere-hour integral; for the filter divergence that may be caused by the rounding error due to the limited word length of the computer, the extended Cal The Mann filter method decomposes the state quantity covariance matrix by square root to ensure that it has symmetric non-negative definiteness at any time, and prevents the filter divergence that may be caused by the limited word length of the computer; this method fully considers the working basis of lithium-ion batteries in groups. On the basis of the equivalent model circuit, the iterative calculation process based on Kalman is improved, and the square root transformation of the matrix is specifically applied to prevent possible filter dispersion, and the establishment of the SOC estimation model of the lithium-ion battery pack and the mathematical iterative operation algorithm of the SOC value are realized. reliable operation.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Welding joint for fuel tank
InactiveCN100513141CImprove computing reliabilityImprove waterproof performanceSynthetic resin layered productsUnderstructuresFuel tankEngineering
Owner:SUMITOMO RIKO CO LTD
Bolt axial stress detection method based on ultrasonic spectrum energy attenuation
ActiveCN113588414ALower requirementLow costMaterial strength using tensile/compressive forcesFrequency spectrumLinear relationship
The invention discloses a bolt axial stress detection method based on ultrasonic spectrum energy attenuation. The bolt axial stress detection method comprises the following steps: 1) clamping a bolt on a tensile sample machine; 2) adjusting the clamping length of the bolt; 3) adjusting axial stress sigma borne by the bolt; 4) exciting one end face of the bolt to generate ultrasonic waves, and collecting voltage signals of the ultrasonic waves reflected from the other end face of the bolt; 5) selecting a primary bottom surface echo f1 (t) and a secondary bottom surface echo f2 (t) containing all cylindrical surface guided wave signals; 6) calculating an energy attenuation coefficient R (sigma); 7) circulating the step 3) to the step 6) to obtain a nonlinear fitting curve of the axial stress sigma and the energy attenuation coefficient R (sigma); 8) circulating the step 2) to the step 7) to obtain a nonlinear fitting curve of the axial stress sigma and the energy attenuation coefficient R (sigma) of the bolt under different clamping length conditions; and 9) carrying out linear fitting between the slope of the nonlinear fitting curve and the corresponding clamping length to obtain a linear relation of the slope of the nonlinear fitting curve along with the change of the clamping length.
Owner:CHONGQING UNIV
A diffuse reflection light source system and design method for visual inspection
ActiveCN110596122BImprove uniformity of illuminationQuality improvementOptically investigating flaws/contaminationTarget surfaceIlluminance
Owner:CENT SOUTH UNIV
Fault-tolerant strategy selection method based on markov Chain in fog environment
ActiveCN110187989BImprove accuracyImprove computing reliabilityReliability/availability analysisSoftware simulation/interpretation/emulationMarkov chainFog computing
The present invention is applicable to the technical field of fog computing, and provides a Markov Chain-based fault-tolerant strategy selection method in a fog environment. The method specifically includes the following steps: S1. For a fog system with N fog nodes, predict that there are i in the fog system. The steady-state probability π of a fog node failure i , i takes values 0, 1, 2,...N in turn; S2, detect π i Whether it is greater than the preset value, if the detection result is yes, the fault-tolerant strategy with the lowest comprehensive cost is output. The comprehensive cost is evaluated based on the price and time of the fault-tolerant strategy. Based on the steady-state probability of the fog system, a low-cost fault-tolerant strategy is selected, taking into account the time and cost of the fault-tolerant strategy, and improving the reliability of fog computing.
Owner:广东致盛技术有限公司
A method for assessing failure rate of mmc
ActiveCN106202970BAccurate lifeImprove computing reliabilityInformaticsInstrumentsFailure rateComputer module
The invention discloses a fault rate evaluation method of an MMC (Modular Multilevel Converter). The fault rate evaluation method comprises the following steps: (1) acquiring a sub-module and a sub-module assembly of an MMC circuit; (2) inputting working parameters of the MMC circuit and the sub-module assembly thereof, and finishing setting of initial conditions; (3) calculating a fault rate of the sub-module assembly according to a fault model to obtain the fault rate of the sub-module; (4) establishing a Markov model of the MMC circuit and establishing a state transfer equation based on the Markov model; (5) solving the state transfer equation to obtain a variation function of the fault rate of the MMC circuit along with time and module quantity, a variation function of the reliability along with the time and the module quantity and average failure time. The calculation reliability of the fault rate of the sub-module assembly is greatly improved and the estimation reliability of the fault rate of the MMC circuit is improved; by applying the Markov model, the solved fault rate and average service life of the MMC circuit are relatively accurate and are varied along with time variation; the fault rate evaluation method has a dynamic property and high fault evaluation precision.
Owner:NANJING INST OF TECH
An Accurate Evaluation Method for Airborne Radioactive Source Items in Severe Accidents of Underground Nuclear Power Plants
ActiveCN106548023BImprove accuracyImprove rationalitySpecial data processing applicationsInformaticsDiffusionRadioactive agent
The invention discloses a method for accurately evaluating airborne radioactive source items in severe accidents of underground nuclear power plants, which comprises the steps of: 1) calculating core burnup for a specific underground nuclear power plant reactor; 2) determining radioactive activity according to an underground nuclear power plant burnup database Maximum burnup point; 3) Calculate the type and activity of radioactive substances released from the fuel into the pressure vessel; 4) Calculate the activity of radioactive substances released from the pressure vessel to the reactor building; The change of radioactive material activity over time; 6) Evaluate underground nuclear power plant cavern engineering measures and natural barriers, and calculate the activity of radioactive material entering the atmosphere; 7) Calculate the activity of radioactive material finally released into the environment. Combining the characteristics of underground nuclear power plants, the invention realizes the quantitative evaluation of the diffusion behavior of airborne radioactive source items when severe accidents occur in underground nuclear power plants through efficient and precise fuel consumption calculation theory and natural surrounding rock shielding calculation model.
Owner:CHANGJIANG SURVEY PLANNING DESIGN & RES
Simulation method of offshore boundary conditions for flng unit liquefaction process
ActiveCN107463754BEffective assessmentReduce computing timeDesign optimisation/simulationSpecial data processing applicationsProcess dynamicsHydrology
Owner:CHINA NAT OFFSHORE OIL CORP +1
Unloading decision and power distribution method in V2V communication based on calculation reliability
PendingCN114302373AImprove computing reliabilityImprove reliabilityParticular environment based servicesVehicle-to-vehicle communicationIn vehicleTime delays
The invention discloses an unloading decision and power distribution method in V2V communication based on calculation reliability, and the method comprises the steps: building a task unloading completion model, dividing a total task of a vehicle-mounted user into a plurality of sub-tasks in the model, and transmitting the plurality of sub-tasks to a fog node for processing, all the sub-tasks are repeatedly sent for multiple times, and when the fog node cannot process the sub-tasks, the fog node sends the sub-tasks to the cloud node for processing; determining the total time delay and the completion probability when a certain subtask is completed; determining the reliability of vehicle-mounted user total task completion, and constructing a reliability maximization problem under power constraint according to the reliability; a specific unloading decision design scheme is given based on a matching theory to solve a maximization problem; compared with a baseline scheme of directly unloading to a cloud node, the method provided by the invention can effectively improve the system reliability under the condition of considering a dynamic channel state environment.
Owner:SOUTHEAST UNIV
Lithium ion battery SOC estimation method based on time-varying correction extended Kalman filtering
InactiveCN113189492ARealize efficient iterative calculationSolve nonlinear problemsElectrical testingBattery chargeComputational physics
The invention relates to a lithium ion battery SOC estimation method based on time-varying correction extended Kalman filtering, which is characterized in that linear processing is carried out by utilizing a Taylor expansion on the basis of a Kalman filtering algorithm, so that Kalman filtering can be applied to SOC estimation of a lithium ion battery pack with a nonlinear relationship; effective iterative calculation of the SOC value of the lithium ion battery pack is realized, and an SOC initial value error and an accumulated error existing in an ampere-hour integral are overcome; it is considered that internal parameters of the model are not constant due to influence of various factors, a function relationship between the SOC and each parameter is obtained through a curve fitting method, and is applied in an algorithm; a Thevenin equivalent circuit model is established, errors caused by the polarization effect are overcome, the steps are short, the principle is clear, the method is suitable for transient analysis of power type battery charging and discharging, and a better characterization effect on the battery is achieved; the method is based on an equivalent model circuit on the basis of fully considering the grouping work of the lithium ion batteries.
Owner:SOUTHWEAT UNIV OF SCI & TECH
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