Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
44results about How to "Justify" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Effective method for quickly eliminating residual stress of heterogeneous component
InactiveCN102799729AHigh densityImprove calculation accuracySpecial data processing applicationsVibration amplitudeElement model
The invention relates to an effective method for quickly eliminating residual stress of a heterogeneous component. The method comprises the following steps of: (1) establishing a heterogeneous component finite element model, wherein the establishing process comprises structure simplification, geometrical model establishment, material attribute definition and grid division; (2) carrying out staticstructural analysis on the heterogeneous component finite element model, and obtaining the residual stress and the distribution thereof of the heterogeneous component through applying screw pretightening force; (3) carrying out modal analysis and calculation on the heterogeneous component finite element model to obtain inherent frequencies of eight front steps of the heterogeneous component, and selecting a preset frequency from the inherent frequency as a vibration aging parameter; (4) carrying out harmonic analysis and calculation on the heterogeneous component finite element model to obtain a relation curve of the deformation amount and the frequency of the heterogeneous component, and determining a vibration amplitude value required during vibration aging through simulating a result; and (5) carrying out transient dynamic analysis on the heterogeneous component finite element model, and obtaining the distribution of the residual stress of the heterogeneous component after the vibration aging through the transient dynamic analysis and calculation.
Owner:BEIHANG UNIV
Joint shearing whole-process damage constitutive model for determining a yield point based on a stress difference
ActiveCN109885980AWell formedThe physical meaning of the parameter is clearSpecial data processing applicationsBreakage probabilityThin layer
The invention discloses a joint shearing whole-process damage constitutive model for determining a yield point based on a stress difference. The method comprises the steps that S1, setting a joint thin-layer microscopic unit body to be loaded and then enters a linear elasticity stage, the joint thin-layer microscopic unit body is an isotropic continuous medium, the microscopic unit body is instantaneously completed when being converted from a lossless state to a lossy state, and the process is irreversible; S2, defining an external load threshold F * based on a Weibull distribution function toobtain a damage probability density function of the mesoscopic unit body; S3, based on a rheological model mechanical element, simulating the load condition of a mesoscopic unit body by adopting thecombination of a spring and a friction plate to obtain a statistical damage constitutive model of the joints under the shearing action; S4, determining an external load threshold F * according to twoparts, namely damage and non-damage, of the rock and soil material after being subjected to load damage, and obtaining a damage evolution model and a joint shear deformation damage constitutive modelof the joint in the shear deformation process; S5, determining parameters m, u0 and us of the joint shear deformation damage constitutive model; and S6, verifying the correctness of the constitutive model.
Owner:CENT SOUTH UNIV
Hybrid power automobile oil consumption theoretical calculation and analysis method
InactiveCN108388746AJustifyQuantitative analysis of factors affecting fuel consumptionGeometric CADDesign optimisation/simulationAnalysis methodFunctional module
The invention discloses a hybrid power automobile oil consumption theoretical calculation and analysis method and aims to solve the problems, in the prior art, that a hybrid power automobile oil consumption theoretical calculation and analysis method is not complete, theoretical calculation cannot be rapidly achieved in the former hybrid power automobile development and design process, and in addition microscopic and detailed oil consumption quantification analysis bases are not available. The method comprises the following steps: I, performing hybrid power automobile oil consumption theoretical calculation, namely 1) classifying hybrid power automobile function modules and energy flow nodes, 2) performing energy flow calculation on different nodes of a hybrid power automobile system, 3) performing average comprehensive transmission efficiency of the hybrid power automobile system, and 4) establishing a hybrid power automobile oil consumption theoretical calculation model; II, analyzing hybrid power automobile oil consumption influence factors, namely 1) establishing a hybrid power automobile oil consumption increment calculation model, and 2) performing quantitative analysis on hybrid power automobile oil consumption influence factors, and achieving detail quantitative analysis on hybrid power automobile oil consumption influence factors.
Owner:JILIN UNIV
Optimal scheduling method and system for electricity-gas-heat comprehensive energy system
PendingCN112417652AJustifyDesign optimisation/simulationConstraint-based CADCarbon emission tradingOptimal scheduling
The invention discloses an optimal scheduling method and system for an electricity-gas-heat comprehensive energy system. The method comprises the following steps: constructing an electricity-gas-heatlow-carbon economic scheduling model based on a stepped carbon transaction mechanism; constructing an objective function and constraint conditions of a low-carbon optimization model based on the electricity-gas-heat low-carbon economic dispatching model; and solving the low-carbon optimization model to obtain low-carbon optimization parameters, performing low-carbon scheduling on the comprehensiveenergy system according to the low-carbon optimization parameters, and therefore, proving the reasonability of the stepped carbon transaction mechanism for low-carbon scheduling.
Owner:NORTHEAST DIANLI UNIVERSITY
Multi-infeed direct-current auxiliary power/frequency combination controller coordination optimization control method
ActiveCN110492499AJustifyRealize emergency controlElectric power transfer ac networkPower oscillations reduction/preventionTransient stateMathematical model
The invention provides a multi-infeed direct-current auxiliary power / frequency combination controller coordination optimization control method, which comprises the following steps of: establishing a mathematical model of a multi-infeed direct-current power transmission system according to a connection relationship of the multi-infeed direct-current power transmission system; solving a multi-infeedinteraction factor, a multi-infeed effective short-circuit ratio and a multi-infeed power support factor of the multi-infeed direct-current power transmission system in a mode of applying small disturbance; determining the final DC power boosting amount of each loop; judging the tie line fault by measuring whether the power of the tie line is suddenly reduced to 0 or not; obtaining a multi-infeeddirect-current auxiliary power / frequency combined controller structure by adopting an active power large-mode controller and a bilateral frequency difference controller structure. The multi-infeed effective short-circuit ratio proportionality coefficient and the multi-infeed power support factor proportionality coefficient are adopted to perform emergency control on an internal fault of the alternating current system and a tie line fault disturbance form, so that coordination and optimization of emergency control of the multi-infeed direct current interconnected power system are realized, andthe transient stability of the system is improved.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
A method for functional prediction of single nucleotide genomic variation in a non-coding region
ActiveCN109033751ALow sequencing depth requirementAvoid time costSpecial data processing applicationsGenomic mutationNucleotide
The invention discloses a method for functional prediction of single nucleotide genomic variation in a non-coding region, which comprises the following steps: 1) identifying a chromatin open region; 2) identifying transcription factor bin sites; 3) assessing the role of single nucleotide variations: Based on the site-specific frequency matrix of transcription factors, the effect of single nucleotide variations in the transcription factor binding site region on transcription factor binding is calculated, and the single nucleotide variations that significantly change the binding capacity of transcription factors are identified; the role of single nucleotide variations is further evaluated by viewing the biological pathway of the target gene of the transcription factor. The method recognizesa variety of transcription factors and their binding sites at one time through chromatin open region information and gene expression information, and realizes the functional annotation of non-coding region genomic mutation.
Owner:SOUTHEAST UNIV
Earth reflection-based analog solar sensor anti-interference method
ActiveCN108827279ATake advantage ofJustifyNavigational calculation instrumentsInstruments for comonautical navigationAlbedoInterference problem
The invention provides an earth reflection-based analog solar sensor anti-interference method, and relates to the technical field of sensor anti-interference. The method comprises the following steps:establishing an earth albedo model, calculating the irradiance received by a solar sensor, obtaining the static characteristic of the irradiance according to the irradiance, obtaining a sunlight andearth reflected light discrimination function, and distinguishing sunlight and earth reflected lights by using the sunlight and earth reflected light discrimination function as a basis of the anti-interference of the solar sensor to earth reflection. The method analyzes a relationship between the irradiance and an incidence angle under an earth reflection condition against the earth reflection-based analog solar sensor anti-interference problem, determines the linear discriminant function between the sunlight and the earth reflected lights by designing a linear classifier, and improves the anti-interference correct rate by fully using measurement information; and the above analysis result shows the rationality of the anti-interference method, and provides a reference basis for the correctuse of the measurement amount of the solar sensor.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Induction heating coil applied to hot-charging knife handle
ActiveCN109714848AImprove heating efficiencyProof of feasibilityCoil arrangementsInduction heating controlEngineeringCopper
The invention discloses an induction heating coil applied to a hot charging knife handle. The induction heating coil comprises a wrapping post made of a high-temperature-resistant material with a certain taper, a plurality of strands of polyurethane round copper stranded wires, a magnetic field gathering groove, a magnetic field gathering cover, an overheating protection module, a work indicatinglamp and the like. According to the invention, the induction heating coil achieves the non-contact heating of the knife handle through the electromagnetic induction principle, and the coil adopts a special winding structure, a special magnetic field gathering part and an assembling structure, so that the generated magnetic field is gathered at the middle upper part of the coil, and the heating section of the knife handle is gathered at the top, thereby smoothly realizing hot charging and taking out of a cutter by the cutter handle, greatly improving the heating efficiency and shortening the hot charging and taking-out time of the cutter.
Owner:ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
Navel paste for treating diarrhea, enuresis, night sweat and spontaneous perspiration, and preparation method thereof
ActiveCN101439092AEasy to refineGood curative effectAnthropod material medical ingredientsAerosol deliverySide effectNavel
The invention relates to a navel paste for treating night sweat, spontaneous sweating, enuresis, and lax and a preparation method thereof. The navel paste is prepared by the following raw materials according to parts by weight: 8-12 g of nutgall, 8-12 g of milk veteh, 1-2 g of cinnamon, and 1-2 g of costustoot. The preparation method of the navel paste comprises the steps that: the nutgall is ground; the volatile of the cinnamon and the costustoot is extracted; the milk veteh is extracted by decocting; finished products are compounded, and the like. The navel paste has the advantages of choice of drugs scouring, a medicine multi-purpose, executing astringing and supplementing, reasonable compatibility of medicine, assistant and guide, and suitable primary and secondary. The preparation method causes that the navel paste is refined in a larger level; that is to say the volume of the navel paste is reduced and the content of active ingredient in unit volume is increased, thus guaranteeing curative effect. By clinical observation, the navel paste has obvious curative effect in treating lax, enuresis, and sweating, thus proving the rationality of the prescriptions of the preparation and the preparation method. Meanwhile, the preparation is characterized by convenient use without any side effect and is especially suitable for the situation of difficult coordination on taking medicine and keeping taking medicine over a long time for infants.
Owner:陕西天地人和药业有限公司
Facility agricultural greenhouse and optimal control method for multiform energy storage
ActiveCN111108969AReduce the impact of stabilityJustifyClimate change adaptationRenewable energy machinesWater storageAgricultural science
An embodiment of the invention provides a facility agricultural greenhouse and an optimal control method for multiform energy storage. A facility agricultural greenhouse structure is established, eachpower supply device and a power consumption model thereof in the greenhouse structure are established, and a coordinated optimal model taking photovoltaic output characteristics, time-of-use power price as well as energy consumption and storage characteristics of facility agricultural production into account is established by taking the lowest comprehensive electric heating operation cost of thefacility agricultural greenhouse as an optimization object. An example result shows that a phase change heat storage and energy storage device and a water storage and energy storage device realize themaximized in-situ consumption of excessive photovoltaics, reduce affects of photovoltaic delivery to the stability of a power distribution network and prove the reasonability of a scheduling controlmodel.
Owner:STATE GRID GASU ELECTRIC POWER RES INST +2
Method for calculating carbonization depth of concrete beam
PendingCN113959825AAccurate predictionEffective predictionInvestigating material hardnessFatigue damageConcrete beams
The invention discloses a method for calculating the carbonization depth of a concrete beam, which comprises the following steps of S1, fitting the square root of the carbonization depth and the carbonization time of the concrete beam under the coupling action of repeated load and carbonization erosion to obtain a formula of the carbonization depth, S2, fitting the square root of the carbonization depth and the carbonization time of the concrete beam which is not subjected to fatigue damage due to carbonization erosion at the same time period to obtain the carbonization coefficient of the concrete which is not subjected to fatigue damage, S3, calculating to obtain a fatigue damage influence coefficient and a fatigue damage degree, and establishing a relational expression between the two, S4, expressing the carbonization coefficient k0 of the concrete without fatigue damage by adopting the carbonization coefficient kP in the corrected Papadakis formula, and S5, substituting into the formula in S1 to obtain a calculation formula of the carbonization depth of the concrete beam. The invention provides a method for calculating the carbonization depth of a concrete beam. The method can effectively, accurately and quantitatively calculate the carbonization depth of the concrete beam under the coupling action of repeated load and carbonization erosion.
Owner:CHANGAN UNIV
Optimal attack threshold value control algorithm for suicidal unmanned plane under interference of escort free-flight decoy
The invention discloses an optimal attack threshold value control algorithm for a suicidal unmanned plane under interference of an escort free-flight decoy. The optimal attack threshold value control algorithm is used for analyzing an attack strategy of a hostile suicidal unmanned plane in the presence of the escort free-flight decoy in combination with a Lanchester equation and optimal control. Firstly, based on analysis on battling performance of an onboard sensing device, a differential equation of military strength loss of both battling sides is built so as to obtain the Lanchester equation. Afterwards, the Lanchester equation is taken as a state equation and attack possibility of the unmanned plane is taken as a control variable to respectively obtain optimal control models under a terminal time specified condition and a terminal time variable condition, and the optimal control problem is solved by adopting a gauss pseudospectral method to obtain an optimal attack strategy. At last, influences caused by performance parameters of a sensor to battling results are analyzed, and simulation results prove the reasonability of the models and the effectiveness of the algorithm.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Combat ability evaluation method combining weighted sum method and SEM method
ActiveCN112632765AReduce difficultyReduce in quantityDesign optimisation/simulationResourcesAlgorithmEntropy weight method
The invention relates to a combat ability evaluation method combining a weighted sum method and an SEM method, and belongs to the field of weapon equipment system ability evaluation. According to the method, aggregation processing of the explicit variables is carried out on a traditional SEM, that is, the entropy weight method is introduced to solve the weights of the bottom-layer indexes, then the weighted sum method is adopted to aggregate the indexes to serve as the new explicit variables, the number of the explicit variables is reduced, the application difficulty of the SEM is reduced, and the requirements for data samples are reduced. Meanwhile, multiple system simulation data under the same simulation scenario condition are collected by referring to a Monte Carlo method, and the method for evaluating by utilizing the mean value of results is more reasonable and comprehensive. The method is suitable for evaluating a large-scale index system (about 400 explicit variables), and the evaluation conclusion of the combat ability of the system under a medium-scale index system (about 50 explicit variables) also proves the rationality of the improved evaluation method.
Owner:INFORMATION CENT OF CHINA NORTH IND GRP
Codebook design method for resisting passive eavesdropping in MISO system based on weighting Voronoi graph
ActiveCN106130611AJustifySolve the problem that the safe transmission rate is too lowSpatial transmit diversityDesign standardEavesdropping
The invention discloses a codebook design method for resisting passive eavesdropping in an MISO system based on a weighting Voronoi graph. The method comprises the steps of 1, taking optimum beam forming on theoretical significance and a corresponding traversal safety rate as references for measuring a safety performance loss; 2, calculating the traversal safety rate after adoption of quantified beam forming, and through combination of the traversal safety rate, obtaining a traversal safety rate loss; 3, defining and calculating a traversal nonzero safety rate loss according to the traversal safety rate loss, and carrying out optimization to obtain an upper bound and a corresponding codebook design standard; 4, establishing the weighting Voronoi graph in complex field Grassmann flow pattern space according to the codebook design standard; 5, with a purpose of minimizing the traversal nonzero safety rate loss, establishing an iterative algorithm VQ-WVD through adoption of an iterative offline training mode, and realizing the weighting Voronoi graph in the complex field Grassmann flow pattern space, generating code words, and obtaining a codebook based on the VQ-WVD.
Owner:XI AN JIAOTONG UNIV
Method for establishing grading standard of Chinese herbal medicine hippocampus japonicus products
The invention discloses a method for establishing a grading standard of Chinese herbal medicine hippocampus japonicus products. The method comprises: step a, carrying out measurement of grading elements; to be specific, carrying out quantification on external property indicators including a shape, a color, hardness, odor and the like; and step b, carrying out determination of the grading elements; to be specific, carrying out a multivariate statistics analysis based on the quantified grading elements and formulating a grading standard of Chinese herbal medicine hippocampus japonicus product specification grades by combining production practice. The method has the following advantages: multiple external properties are considered comprehensively to carry out objective quantification and comprehensive evaluation; and the support can be provided for quality management of the producer; and the guidance can be provided for consumption selection of consumers.
Owner:NINGBO UNIV
Multi-domain network community discovery system fusing discrete time quantum walk
ActiveCN113723582AQuick checkEfficient detectionData processing applicationsArtificial lifeCommunity settingDatabase
The invention provides a multi-domain network community discovery system fusing discrete time quantum migration. The multi-domain network community discovery system comprises a code construction module, a quantum replacement module, a migration module, a community optimization module and an evaluation index module, the data output end of the code construction module is connected with the data input end of the quantum permutation module, the data output end of the quantum permutation module is connected with the data input end of the migration module, and the data output end of the migration module is connected with the data input end of the community optimization module. The data output end of the community optimization module is connected with the data input end of the evaluation index module. According to the invention, the community in the multi-domain network can be quickly and efficiently detected.
Owner:CHONGQING UNIV OF TECH
Preparation method of navel paste for treating diarrhea, enuresis, night sweat and spontaneous perspiration
ActiveCN101439092BJustifyAvoid side effectsAnthropod material medical ingredientsPlant ingredientsAdditive ingredientMedicine
Owner:陕西天地人和药业有限公司
Trial variation particle swarm optimization method and system, computer equipment, medium and application
ActiveCN112464573AEffective maintenance of diversityJustifyArtificial lifeDesign optimisation/simulationGlobal optimizationGlobal optimal
The invention belongs to the technical field of reliability optimization, and discloses a trial variation particle swarm optimization method and system, computer equipment, a medium and application, and the method comprises the steps: designing a direct position updating strategy and a trial variation strategy based on a PSO algorithm; through verification and comparison of complex test functions,proving the rationality of design of the DTSPO method and excellent global optimization capability of the method. According to the method, a direct position updating strategy and a trial variation strategy are designed, so that the diversity of populations and the balance of exploration and development are effectively maintained, and the probability of obtaining a globally optimal solution is improved; through verification and comparison of nine complex test functions, the reasonability of the DTSPO method design and the excellent global optimization ability of the algorithm are proved. Comparison results prove that the DTPSO algorithm provided by the invention can provide effective technical support for practical application such as reliability optimization and the like.
Owner:CIVIL AVIATION FLIGHT UNIV OF CHINA
Performance analysis method of d2d cellular heterogeneous network based on queuing theory
ActiveCN106304165BDetailed scene settingReasonable scene settingTransmission monitoringWireless communicationPacket lossStatistical analysis
The invention discloses a performance analysis method of a D2D cellular heterogeneous network based on queuing theory and belongs to the mobile communication technology field. For a scene of a D2D user reusing a cellular user uplink channel, taking consideration of influence of a distance between the cellular user and a D2D reception end on D2D transmission performance and combining a limited dynamic business arrival mode, the performance analysis method is provided. The performance analysis method comprises steps that an interference zone of the D2D reception end is divided, statistics analysis is carried out according to probability of the cellular user falling into the interference zone, a data state of the D2D user is described through an M / G / 1 queuing model, transfer probability of the waiting-to-be-transmitted-data quantity in a D2D user buffering zone is analyzed through utilizing an embedded Markov chain, and average queue length, average throughout, average time-delay and packet loss ratio expressions are acquired through stable state step-by-step derivation; through system simulation, calculation correctness can be theoretically analyzed, and rationality of an established analysis model is proved.
Owner:正链科技(深圳)有限公司
Electric ball valve mounting structure in deep marine environment
The invention relates to an electric ball valve mounting structure in a deep marine environment. The electric ball valve mounting structure comprises a bottom sealing cover, wherein an electric ball valve body is arranged in the middle of the upper part of the bottom sealing cover; an oil filling cover is arranged on the bottom sealing cover through a sealing strip and a bolt; a top sealing coveris arranged on the top of the oil filling cover through the same sealing strip and bolt; threaded holes are formed in connecting surfaces at two ends of the oil filling cover; steel tubes are symmetrically arranged in the two threaded holes; welding neck flanges are arranged at the outer ends of the steel tubes; dismountable flanges are arranged at the inner ends of the steel tubes and are connected with the steel tubes through bolts; and flange gaskets are arranged at the ends of the dismountable flanges. The electric ball valve mounting structure disclosed by the invention is compact and reasonable and is convenient to operate, and the maximum environment stress of 20MPa can be borne by adopting oil filling design inside deep sea. Due to examination of a pressure cylinder test, the rationality of the design is proved.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
Design method of optical fiber sensing ring of optical fiber current transformer based on 650nm waveband
ActiveCN111948751AImprove accuracyLow costCladded optical fibreVoltage/current isolationPhotonic crystalInstrument transformer
The invention relates to a design method of an optical fiber sensing ring of an optical fiber current transformer based on a 650nm waveband. The invention belongs to the technical field of all-fiber current sensing design. The method comprises the steps of enabling a cross section structure of an optical fiber to be provided with multiple layers of air holes; determining chiral parameters of the optical fiber according to the concentration of griseofulvin in PMMA in a refractive index guide type chiral photonic crystal fiber; determining the value range of the air filling ratio of the opticalfiber, and randomly taking the numerical value meeting the requirement as the final air filling ratio of the optical fiber; and determining the value range of the lattice constant of the optical fiberaccording to the obtained chiral parameters and air filling ratio of the optical fiber, and randomly taking the numerical value meeting the requirement as the final lattice constant of the optical fiber. The ratio difference of an optical fiber current transformer system adopting the scheme of a photonic crystal optical fiber sensing ring is 0.235%, the rationality of the parameter design of thedesigned chiral photonic crystal optical fiber is proved, and the current measurement accuracy of the optical fiber current transformer system is indicated to be improved.
Owner:HARBIN INST OF TECH
Apparatus and method for controlling usage of non-optimal path
An apparatus, method, and non-transitory computer-readable media are provided for controlling usage of an non-optimal path. In use, for example, a processing device identifies one of a plurality of paths as an optimal path based on a plurality of round trip time (RTT) values, where the RTT values include an optimal path round trip time (RTT) value of the optimal path and at least one non-optimal path RTT value of at least one non-optimal path. A threshold data amount is determined in connection with the at least one non-optimal path, based on the optimal path RTT value of the optimal path andthe at least one non-optimal path RTT value of the at least one non-optimal path. Further, an application data amount is estimated by the processing device in connection with messages of at least oneapplication. Such application data amount and threshold data amount are compared by the processing device. To this end, usage of the at least one non-optimal path is controlled by the processing device for communicating the messages of the at least one application, based on the comparison of the application data amount and the threshold data amount.
Owner:HUAWEI TECH CO LTD
Method for estimating fatigue life of automobile structural component
PendingCN113029537AImprove accuracyJustifyVehicle testingMachine part testingExercise timeIndustrial engineering
The invention discloses a method for estimating the fatigue life of an automobile structural member, which is characterized by comprising the following specific steps of (1) determining the yield limit sigma s and the fatigue limit sigma-1 of a part according to the material characteristics of the part, and measuring or estimating an S-N curve of the part; (2) calculating an optimal strengthening load Sg, an optimal strengthening effect betag and a strengthening load interval; (3) calculating the optimal strengthening effect beta R corresponding to the specific strengthening load and the strengthening effect beta R, n corresponding to the specific exercise times of the specific strengthening load; (4) carrying out cycle counting on the part load spectrum and grading the part load spectrum as Si, wherein the corresponding cycle number is ni; determining an enhanced load level Sq which corresponds to a cycle number nq; a damage load stage Sw corresponding to the number of cycles nw; (5) calculating the original fatigue life corresponding to each stage of load according to the S-N curve, and calculating the fatigue life after the optimal strengthening effect is obtained; (6) calculating the damage of a stage I and a stage II; and (7) when the fatigue failure phenomenon of the part occurs, calculating the total load block number, namely the fatigue life of the part.
Owner:SHANGHAI DIANJI UNIV
A damage constitutive model for the whole process of joint shear based on the determination of yield point based on stress difference
ActiveCN109885980BWell formedThe physical meaning of the parameter is clearDesign optimisation/simulationClassical mechanicsStructural engineering
The invention discloses a joint shearing whole-process damage constitutive model for determining a yield point based on a stress difference. The method comprises the steps that S1, setting a joint thin-layer microscopic unit body to be loaded and then enters a linear elasticity stage, the joint thin-layer microscopic unit body is an isotropic continuous medium, the microscopic unit body is instantaneously completed when being converted from a lossless state to a lossy state, and the process is irreversible; S2, defining an external load threshold F * based on a Weibull distribution function toobtain a damage probability density function of the mesoscopic unit body; S3, based on a rheological model mechanical element, simulating the load condition of a mesoscopic unit body by adopting thecombination of a spring and a friction plate to obtain a statistical damage constitutive model of the joints under the shearing action; S4, determining an external load threshold F * according to twoparts, namely damage and non-damage, of the rock and soil material after being subjected to load damage, and obtaining a damage evolution model and a joint shear deformation damage constitutive modelof the joint in the shear deformation process; S5, determining parameters m, u0 and us of the joint shear deformation damage constitutive model; and S6, verifying the correctness of the constitutive model.
Owner:CENT SOUTH UNIV
A Method for Constructing Failure Criterion of Rock Under Triaxial Compression
ActiveCN112014213BWell formedParameters are clear and easy to findMaterial strength using tensile/compressive forcesComplex mathematical operationsFriction angleMechanical engineering
Owner:CENT SOUTH UNIV
Design method of micro-pulse laser radar optical path parameter topological structure
ActiveCN114595617AImprove structural strengthIncrease stiffnessGeometric CADInternal combustion piston enginesContinuous lightEngineering
The invention discloses a design method of a micro-pulse laser radar optical path parameter topological structure, belongs to the technical field of pulse measurement, is used for designing the optical path parameter topological structure, and comprises the following steps: establishing an all-optical path parameter topological model; topological optimization is carried out, and a design domain, a design load, constraints and boundary conditions are defined; based on the SIMP model, solving the quality characteristics, the element stiffness matrix and the node displacement of the discrete finite element unit; solving a light path total structure function and sensitivity; judging a convergence condition, and establishing a continuous light path structural body topological optimization model; through CFD numerical simulation, a working load in a running state is obtained to serve as an optimization condition of topological optimization, and an optical path structure reconstruction model is established for mass distribution of a topological optimization result; and carrying out size optimization analysis on the light path structure reconstruction model, and verifying results of weight reduction and rigidity increase of a topological optimization result. According to the invention, through topological optimization, a mass distribution result with a complete force transmission path and a clear structure is obtained.
Owner:SHANDONG UNIV OF SCI & TECH
Random emergency material shortage propagation and transverse multistage resupply system design method
PendingCN113722885AImprove the timeliness of emergency rescueJustifyMedical simulationDesign optimisation/simulationEmergency rescueComputer science
The invention provides a random emergency material shortage propagation and transverse multistage resupply system design method, and relates to the technical field of system design. The random emergency material shortage propagation and transverse multi-stage resupply system design method comprises the steps that: before system design preparation work, the research progress about virus propagation and diffusion rules and control methods and emergency material transverse supply at home and abroad can be looked up, the research progress is combined with theories and methods used for solving the emergency material transverse supply problem, and a foundation is laid for work content before system design preparation. A transverse supply mechanism is introduced for maintenance spare parts, a multi-target emergency material transverse multi-stage re-supply model is established, actual cases are adopted for verification and analysis, a post-earthquake initial stage emergency material transverse supply scheme is solved and optimized, the emergency rescue timeliness is improved, and meanwhile, the reasonability of the designed emergency material shortage transverse supply model is also proved.
Owner:BEIJING UNION UNIVERSITY
Coordinated optimization control method for multi-infeed DC auxiliary power/frequency combination controller
ActiveCN110492499BJustifyRealize emergency controlElectric power transfer ac networkPower oscillations reduction/preventionTransient stateMathematical model
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
An anti-jamming method for analog sun sensors based on earth albedo
ActiveCN108827279BTake advantage ofJustifyNavigational calculation instrumentsInstruments for comonautical navigationAlbedoAnti jamming
Owner:NORTHWESTERN POLYTECHNICAL UNIV
A theoretical calculation and analysis method for fuel consumption of hybrid electric vehicles
InactiveCN108388746BJustifyQuantitative analysis of factors affecting fuel consumptionGeometric CADDesign optimisation/simulationHybrid electrical vehicleControl theory
Owner:JILIN UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com