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Comprehensive health status evaluation method for rotation machinery equipment based on influence of use and maintenance
ActiveCN105527112ASolve problemsRealize evaluationStructural/machines measurementSpecial data processing applicationsEvolution ruleSelf-organizing map
The invention discloses a comprehensive health status evaluation method for rotation machinery equipment based on influence of use and maintenance. The health status of the equipment is influenced by different factors, related influential factors are analyzed and arranged, and divided into technical status factors and non-technical status factors, and concepts of an inherent health degree and a comprehensive health degree are defined. The inherent health degree of the rotation machinery equipment is evaluated on the basis of WPD (Wavelet Packet Decomposition) and SOM (Self-Organizing Map) by utilizing degeneration state monitoring data of the equipment. A proportion degeneration model is established by considering influence of service age and condition; and on the basis of an evaluation result of the inherent health degree, influence of service age and condition is also taken into evaluation of the comprehensive health degree. A proportion health recovery model is established, and influence of maintenance is further taken into evaluation of the comprehensive health degree. Influence of the service age, condition and maintenance are comprehensively considered on the basis of the proportion degeneration model (PDM) and the proportion health recovery (PHR) model, and evolution rule of the comprehensive health degree is derived.
Owner:BEIJING INST OF ELECTRONICS SYST ENG
Knowledge graph information representation learning method, system, equipment and terminal
PendingCN112765369AGood modelingEnhance expressive abilityKnowledge representationSpecial data processing applicationsModelSimEngineering
The invention belongs to the technical field of knowledge maps, and discloses a knowledge map information representation learning method, a system, equipment and terminal, and the knowledge map information representation learning method comprises the steps: carrying out the preprocessing according to a path constraint resource distribution method; calculating the reliability of all paths, and outputting the reliability to a training set and a test set; initializing the model and setting parameters; generating a triple according to an iterator, and randomly replacing head and tail entities; calculating a loss function of the triple according to the score function; calculating a loss function of an additional path according to the path reliability; performing parameter optimization by using an Adam method; and performing model verification by using entity prediction and relation prediction. According to the method, rich path information contained in the knowledge graph is considered, the modeling effect of entities and relationships is improved, the modeling of the relationships can be optimized by inputting vectors into a complex plane and using rotation to represent the vectors, and the method can be used for link prediction and recommendation systems.
Owner:XIDIAN UNIV
SAR (synthetic aperture radar) image change detection method based on high-order neighborhood TMF (triplet Markov random field) model
InactiveCN104680549AEffectively reflect non-stationarityImprove robustnessImage enhancementImage analysisPattern recognitionSynthetic aperture radar
The invention discloses an SAR (synthetic aperture radar) image change detection method based on a high-order neighborhood triplet Markov random field model, and mainly solves problems of high false detection amount and low overall precision of an existing method. The SAR image change detection method comprises the following steps: 1, inputting two time phase SAR images and generating a differential image; 2, initializing a labeling field X; 3, initializing a likelihood parameter; 4, performing definition on the initialized labeling field X by adopting a 3*3 neighborhood and initializing an auxiliary field U; 5, constructing a priori potential energy function comprising a homogeneous region, a heterogeneous region and a U field part by adopting a 5*5 high-order neighborhood; 6, updating the labeling field X and the auxiliary field U; 7, updating the likelihood parameter according to the updated labeling field X; 8, performing iterative updating on the labeling field X and the auxiliary field U and obtaining a final change detection result. Compared with the prior art, the SAR image change detection method reduces the false detection amount, improves the overall detection precision, enhances the noise robustness, and can be used for SAR image recognition.
Owner:XIDIAN UNIV
Circuit control system and method for dynamically adjusting voltage and frequency
ActiveUS9317048B2High degree of automationReduce complexityEnergy efficient ICTPower supply for data processingControl systemComputer module
Owner:ALLWINNER TECH CO LTD
Grey-fuzzy educational informationization level assessment method and system
The invention discloses a gray and fuzzy evaluation method for the level of educational informatization, specifically: setting evaluation indicators and evaluation grades for the objects to be evaluated; Enter the weight of each evaluation level to form a membership degree matrix R; calculate the weight of each evaluation index according to the importance evaluation results of each evaluation index by each expert, and form an index weight vector W; calculate the rating membership degree B=W ·R; Calculation of informatization score Z=B·D T , so as to determine the informatization level to which the object to be evaluated belongs, D is a vector composed of the intermediate scores of each evaluation level score interval, and the superscript T represents transposition. The present invention also provides a system for realizing the above method. The invention fully and systematically considers informatization data that is difficult to quantify and incomplete information, makes the evaluation result more accurate, and realizes the effective evaluation of the education informatization level.
Owner:HUAZHONG NORMAL UNIV
Full-working condition performance prediction method for compressor
ActiveCN110701086ASimple designShorten the design cycleEngine fuctionsPump controlImpellerDesign cycle
The invention discloses a full-working condition performance prediction method for a compressor, and aims at providing a rapid and accurate full-working condition aerodynamic performance prediction method so as to increase the design and optimization efficiency of the compressor. In the method, a formula is established by taking parameters of a design point as the reference to predict the flow, the efficiency and the overall pressure ratio of an off-design working condition; in a flow prediction method, firstly, the flow of the design point is converted according to an empirical formula to flow corresponding to a peak efficiency point at different rotating speeds, and then, blocking flow and surging flow at respective rotating speeds are calculated; in an efficiency prediction method, firstly, the efficiency of the design point is converted according to the empirical formula to peak efficiency at different rotating speeds, and then, the efficiency at different rotating speeds is calculated according to an elliptic piecewise approximation method; and in a prediction method for the overall pressure ratio, work factors at different rotating speeds and different flow are calculated according to the thought of the equivalent width of an impeller exit, and the work factors are combined with current efficiency to obtain the overall pressure ratio. By applying the full-working condition performance prediction method to design and optimization of the compressor, the design cycle can be remarkably shortened, and the design cost is reduced.
Owner:TIANJIN UNIV
Planar antenna near-field measurement method and system capable of reducing truncation errors
ActiveCN111366793AExtrapolation worksHigh engineering practical valueAntenna radiation diagramsPlanar antennasSpectral domain
The invention discloses a planar antenna near-field measurement method capable of reducing truncation errors, which comprises the steps of obtaining a plane wave spectrum output by a probe through inverse Fourier transform according to an electric field received by the probe; carrying out probe correction; calculating the credible spectral domain of the plane wave spectrum of a to-be-measured antenna according to the emission spectrum of the to-be-measured antenna and a spectral domain filtering function; obtaining an aperture electric field of the to-be-measured antenna through Fourier transform according to the credible spectral domain of the plane wave spectrum of the to-be-measured antenna; performing inverse Fourier transform according to the aperture electric field of the to-be-measured antenna to obtain a scalar form of the plane wave spectrum of the to-be-measured antenna and an electric field located between the to-be-measured antenna and the scanning surface; introducing additional row or column measurement, and calculating an electric field located at the position of an additional row or column probe; calculating an iterative error for each additional row or column measurement; and repeating until the nth iteration error is greater than the (n-1)th iteration error, and terminating iteration. According to the invention, the truncation error problem in planer near-field measurement is reduced based on a band-limited function extrapolation algorithm.
Owner:SHANGHAI HOLLYWELL ELECTRONICS SYST TECH
Full-drive underwater vehicle track tracking control method based on optimization algorithm
ActiveCN112034865AIn line with the actual applicationGuaranteed speed error convergenceAltitude or depth controlKinematic controllerControl engineering
The invention relates to a full-drive underwater vehicle track tracking control method based on an optimization algorithm, and belongs to the technical field of underwater vehicle track tracking control. The method comprises the steps of obtaining motion parameters of a vehicle, and designing a motion attitude constraint vector and a speed constraint vector of the vehicle; calculating a tracking error, and obtaining a kinematics controller and a dynamics controller according to the six-degree-of-freedom model of the vehicle; finally, obtaining the expected speed through the kinematics controller, and deriving the force and the moment in each degree of freedom through the dynamics controller; and carrying out the method until track tracking is completed. The redundancy problem of a full-drive vehicle in tracking a three-dimensional curve is solved, and meanwhile the attitude and speed constraint problem of the vehicle in the moving process is considered. An attitude and speed constraintconstruction optimization problem is a convex optimization problem, multiple reliable methods are provided for solving, and the solving speed can meet the real-time requirement; and the problem of speed saturation in operation of the full-drive vehicle is fully considered, and the practicability is high.
Owner:ZHEJIANG UNIV +2
Mobile node parameter adaptive track prediction method
InactiveCN104936289APrecise positioningImprove accuracyNetwork topologiesLocation information based serviceSimulationSelf adaptive
The invention relates to a mobile node parameter adaptive track prediction method. The influences of environmental factors on nodes under a dynamic sea condition are considered; the adaptability to a variable environment is fully considered specific to the requirement of a sea moving object on a positioning method; and the motion situations of beacon nodes are introduced into node motion track prediction. After a motion track is determined, a sampling region and a sample point weight are determined on the basis of an improved Monte Carlo method. Information about relative positions with one-hop and two-hop beacon nodes in the motion processes of unknown nodes is taken as a filter condition, so that the sampling rate, sampling speed and positioning accuracy are increased. The adaptive track prediction method can be established according to environmental changes. The motion tracks of the unknown nodes are predicted through effective utilization of the motion situations of sea area beacon nodes, and an improved Monte Carlo positioning method is put forward in combination with motion characteristics, so that the sea dynamic node positioning capability can be enhanced, and the sea search-rescue speed and success rate are increased.
Owner:SHANGHAI MARITIME UNIVERSITY
AIRPORTP Symmetry Model (ASM)-based flight delay prediction and propagation analysis method
ActiveCN110009939AImprove service qualityFully considerForecastingDesign optimisation/simulationSimulationAnalysis method
The invention provides an AIRPORTP Symmetry Model (ASM)-based flight delay prediction and propagation analysis method. According to the method, first, to solve the delay prediction problem, an MNR model is constructed by using information like flight message data, airplane departure time at a previous station, an airplane model, and whether a VIP is on the airplane, so as to predict flight arrivaltime; second, to solve the delay propagation problem, a delay propagation symmetry model ASM is constructed by using MPM, the concept of deformation gradient is defined, if the deformation gradient is less than zero, the flight is not affected by delay, or, the flight is delayed due to factors or the flight or external factors; and finally, if the flight is affected, MNR is improved based on theASM model, a transmission factor is introduced for each parameter of the MNR model so as to analyze delay propagation, flight delay time is updated in real time based on propagation analysis, an arrival delay equation can be updated in real time, the delay propagation problem is considered thoroughly, the obtained result is more accurate, and calculation is faster.
Owner:青岛民航凯亚系统集成有限公司
Treatment liquid for trivalent chromium conversion coating and treatment method of metal substrate
ActiveUS20160208391A1Excellent corrosion resistance and scratch resistanceHigh stabilitySolid state diffusion coatingWelding/cutting media/materialsOrganic acidConversion coating
Provided are a treatment liquid for a trivalent chromium conversion coating, achieving excellent corrosion resistance and scratch resistance without containing a cobalt compound, with high stability and adequate consideration for environmental issues; and a method for treating a metal substrate using the same. Provided is a treatment liquid for a trivalent chromium conversion coating on the surface of a metal substrate comprising: a trivalent chromium compound; titanium lactate; one or more compounds of transition metal other than cobalt; two or more organic acids or organic acid salts, and at least one ion species selected from chloride ions, nitrate ions, and sulfate ions; but no cobalt compound.
Owner:NIPPON HYOMEN KAGAKU KK
Method and device for calculating equivalent minable thickness ratio of coal mine goaf for overhead transmission line
ActiveCN106777655AEnsure safetyHelp determineData processing applicationsDesign optimisation/simulationComputer scienceCalculation methods
The invention discloses a method and device for calculating an equivalent minable thickness ratio of a coal mine goaf for an overhead transmission line. The method comprises the following steps: calculating an equivalent thickness of each rock-soil layer above the gaof; accumulatively summing the equivalent thicknesses (shown in the specification) of all the layers of an overlying rock-soil layer so as to calculate a total equivalent thickness, corresponding to a standard medium, of the overlying rock-soil layer; calculating the equivalent minable thickness ratio of the goaf according to a mining thickness of a coal bed and the total equivalent thickness of the overlying rock-soil layer. Based on sufficient calculation theoretical basis and comprehensive consideration, a result is reliable; the influence degree of the thickness and the nature of the overlying rock-soil layer on surface deformation can be reasonably considered; the severity of actual surface deformation can be accurately reflected; evaluation of the dangerousness of the surface deformation of the goaf where the transmission line passes can be facilitated; determination of a reasonable planning, construction and operation technical scheme for the overhead transmission line of the coal mine goaf can be facilitated; the method has important guidance significance and reference value for guaranteeing the safety of the transmission line.
Owner:国网山西省电力公司阳泉供电公司 +2
Trusted startup method for BMC firmware system security
PendingCN112651030AEasy to handleConvenient, fast and timely processingDigital data protectionPlatform integrity maintainanceFile systemAttack
The invention discloses a trusted startup method for BMC firmware system security, belongs to the field of trusted startup, and is characterized in that trusted measurement is performed on a BMC without a trusted cryptographic module according to a file system, a bootstrap program and a kernel in sequence, and then trusted startup is performed on the BMC firmware system. The BMC processor is guided to measure and obtain an actual measurement reference value of the file system according to a trusted computing module preset in a nonvolatile storage area b and a factory file system standard reference value imported by a developer in advance by means of a repositionable function program arranged in the nonvolatile storage area a, if not, an alarm is given, and if yes, it is trustful; and verifying the bootstrap program and the kernel according to the same method, and once the bootstrap program and the kernel are credible, directly entering a starting stage of the BMC firmware. Based on the basic fact that the attack resistance of the kernel plug-in including a file system is weaker than that of a bootstrap program and a kernel, the potential safety hazard of system equipment caused by a method of starting while checking or checking after starting is overcome in advance.
Owner:BEIJING UNIV OF TECH
Hydrogen refueling station building area and scale system and method
PendingCN113609209ANarrow down the scope of the siteImprove economic efficiencyDrawing from basic elementsData processing applicationsData harvestingCollections data
The invention discloses a hydrogen refueling station building area and scale system and method, and relates to the technical field of hydrogen refueling stations. The system comprises a station building data collection module, and the station building data collection module comprises user information collection, hydrogen information collection and other information collection. The hydrogen refueling station building area and scale system and method have the beneficial effects that sufficient data support can be obtained through systematized and scientific steps according to a station construction data collection step, a data analysis chart drawing step and a data comprehensive analysis processing step, through intuitive data analysis after drawing, through twice data analysis of primary overlay processing, primary data analysis, secondary overlay processing and secondary data analysis, the station building range is further narrowed and the final station building scale is determined conveniently according to accurate judgment, so that the station building site selection position and scale can be matched with the number of vehicles and the hydrogenation capacity in the area, the economic benefit is improved, and meanwhile the situation of resource waste is avoided.
Owner:上海氢枫能源技术有限公司
SAR image change detection method based on high-order neighborhood tmf model
InactiveCN104680549BEffectively reflect non-stationarityImprove robustnessImage enhancementImage analysisReference fieldRandom field ising model
The invention discloses a SAR image change detection method based on a high-order neighborhood triple Markov random field model, which mainly solves the problems of high number of false detections and low overall precision in the existing method. 2. Initialize the label field X; 3. Initialize the likelihood parameters; 4. Define and initialize the auxiliary field U with a 3×3 neighborhood on the initialized label field X; 5. Use 5×5 The higher-order neighborhood of constructs a priori potential energy function composed of homogeneous area, heterogeneous area and U field; 6. Update the label field X and auxiliary field U; 7. Update the likelihood according to the updated label field X parameter; 8. Iteratively update the label field X and the auxiliary field U to obtain the final change detection result. Compared with the prior art, the invention reduces the number of false detections, improves the overall detection precision, and enhances the robustness to noise, and can be used for the recognition of SAR images.
Owner:XIDIAN UNIV
Method for confirming storage service life of resin adhesive and device and electronic equipment
ActiveCN108536918AAccurate shelf lifeImprove goodness of fitDesign optimisation/simulationSpecial data processing applicationsEpoxyGoodness of fit
The invention relates to a method for confirming the storage service life of a resin adhesive and a device and electronic equipment. The method comprises the following steps: by improving an Arrheniusmodel, establishing a secondary relationship of a logarithm of an acceleration service life of a resin adhesive and a temperature reciprocal so as to obtain a relationship of the acceleration servicelife and the temperature of the resin adhesive; calculating an actual storage service life of the resin adhesive at a normal storage temperature. By adopting the method, relatively high fit goodnessof service lives and temperatures can be achieved, and the storage service life of an epoxy resin adhesive is relatively accurate; a nonlinear relationship of temperatures and acceleration service lives can be widened, data fitting can be carried out through an improved model, the problem that the relationship of high secondary items of temperatures and service lives cannot be reproduced by usinga conventional Arrhenius method is solved, and service life estimation errors can be reduced; calculation can be updated at different temperatures, and compared with a conventional method, the methodis not only applicable to service life pre-estimation on the resin adhesive at a low temperature, and is also applicable to situations of high-temperature service life estimation.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
Spinning forming method and spinning device for W-shaped metal sealing ring
ActiveCN112845783ASolve technical problems that are difficult to locateUniform spinningPolymer scienceSpinning
The invention discloses a spinning forming method for a W-shaped metal sealing ring. The method comprises the following steps: S100, the height of an annular blank of the W-shaped metal sealing ring is calculated according to the axial section of the W-shaped metal sealing ring, and the annular blank with the height is prepared; S200, an annular waist groove part is machined in a spinning mode along the radial center of the annular blank prepared in the step S1, and the waist groove part is sunken in the direction where the axis of the annular blank is located; and S300, the parts, located on the two sides of the waist groove part, in the annular blank are subjected to spinning machining, and the W-shaped metal sealing ring is formed. The W-shaped metal sealing ring which is flat, complete and uniform in spinning can be obtained with the method; and a supporting ring is stuffed into the waist groove part of the annular blank, so that the strength of the edge of a second mold core is improved, and the technical problem that the annular blank is difficult to position is effectively solved.
Owner:HUNAN UNIV
Steam power system modeling method and device for power-driven equipment selection
ActiveCN104424372BQuick calculationQuick modificationSpecial data processing applicationsDevice typeMathematical model
Disclosed are a steam power system modeling method and a steam power system modeling device for power drive device type selection. The steam power system modeling method for the power drive device type selection includes: confirming performance indexes and technological parameters of all devices in a steam power system; building a first nonlinear mathematical model of the steam power system; generating a power drive device type selection alternative scheme and configuring corresponding parameters according to power drive power requirements of all portions in the steam power system and pressure level conditions of a steam pipeline at a position where a drive of a device to be selected is located; performing linear conversion between a solution of the first nonlinear mathematical model and the power drive device type selection alternative scheme, and generating a mixed integer linear mathematic model; judging whether the optimal power drive device design scheme meets an overall performance index of the steam power system according to an optimized solution of the mixed integer linear mathematic model; if the optimal power drive device design scheme meets the overall performance index, generating a second nonlinear mathematical model of the steam power system according to the optimal power drive device design scheme.
Owner:PROCESS INTEGRATION
Method for designing stabilizer of an uncertain power system based on interval time lag influence
ActiveCN112186780ATake advantage ofFully considerPower oscillations reduction/preventionRobustificationFeedback controller
The invention relates to a method for designing a stabilizer of an uncertain power system based on interval time lag influence, which comprises the following steps of: constructing a new augmentationvector and a multiple integral LyapunovKrasovskii functional, then introducing a double Wirtinger inequality to estimate a functional derivative on the basis of a single Wirtinger integral inequality,and adopting a convex combination method, so that a system robustness stability criterion with lower conservative property is obtained. On the basis, a memory-free and memory feedback controller of the system is designed, and a step linearization method is applied to obtain a stabilizer existence condition based on a strict linear matrix inequality. Finally, simulation analysis verifies that themethod provided by the invention effectively enlarges the stable operation region of the power system, and the designed controller has better control performance.
Owner:HENAN POLYTECHNIC UNIV
Text emotion analysis method and device, electronic equipment and non-transient storage medium
PendingCN110427454AReal-time analysisComprehensive and accurate analysisCharacter and pattern recognitionText database queryingFeature vectorAnalysis method
The invention provides a text emotion analysis method and device, electronic equipment and a non-transient storage medium, and relates to the technical field of artificial intelligence, and the methodcomprises the steps: obtaining a to-be-analyzed text and a context text; performing word segmentation processing on the context text and the to-be-analyzed text to obtain a first word segmentation set and a second word segmentation set; converting the first word segmentation set and the second word segmentation set into a first feature vector set and a second feature vector set respectively; multiplying a forgetting gate in the text emotion analysis model by the first feature vector set to obtain a first product; multiplying an input gate in the text emotion analysis model by the second feature vector set to obtain a second product; calculating the sum of the first product and the second product as the unit state of the to-be-analyzed text; and applying the unit state of the to-be-analyzed text to an output gate of the text emotion analysis model, and outputting an emotion identifier of the to-be-analyzed text. According to the technical scheme, the emotion analysis accuracy can be improved.
Owner:PING AN TECH (SHENZHEN) CO LTD
Chemical reaction conversion rate prediction method and system based on deep learning, and medium
PendingCN114203264AFully considerTake advantage ofChemical property predictionChemical processes analysis/designChemical reactionReagent
The invention discloses a chemical reaction conversion rate prediction method and system based on deep learning and a medium, and the method comprises the steps: selecting a reactant type A which has the greatest influence on the chemical reaction conversion rate from the types of reactants participating in a chemical reaction, carrying out word segmentation and feature extraction on reactants of the reactant type A and a chemical reaction formula R corresponding to the chemical reaction, and then solving deep characterization information Ta of the reactants of the reactant type A, deep characterization information Tr of the chemical reaction formula R corresponding to the chemical reaction and relation information Tm of the reactants and the reaction formulas through an attention mechanism; and finally, fusing the deep characterization information Ta of the reactant of the reactant type A, the deep characterization information Tr of the chemical reaction formula R corresponding to the chemical reaction and the relation information Tm of the reactant and the reaction formula by using a wide learning system, and predicting the conversion rate of the chemical reaction. The prediction precision of the chemical reaction conversion rate is greatly improved.
Owner:SOUTH CHINA UNIV OF TECH
Collection method of quality of life based on cloud computing
ActiveCN103226798BImprove the quality of lifeFully considerSpecial data processing applicationsLife qualityUnique identifier
The invention discloses a quality of life condition collection method based on cloud computing, which comprises the following steps: (1) utilizing a mobile terminal to collect user information, storing the user information in a database, and adding a unique identifier to differentiate; and (2) differentiating and uploading data not synchronized via the identifier in the database, and downloading new data in a server. The quality of life condition collection method continuously monitors each individual patient's quality of life for a long term, scientifically collects and analyzes the each individual patient's state of quality of life, selects the most reasonable and economical treatment scheme by combining individual condition, improves the patient's quality of life and subsistence benefit, enables different patients' different changes of quality of life to be fully considered, obtains the optimal benefits, and avoids medical resource waste caused by empirical selection.
Owner:SUN YAT SEN UNIV CANCER CENT
Performance Prediction Method of Compressor under All Operating Conditions
ActiveCN110701086BSimple designShorten the design cycleEngine fuctionsPump controlImpellerDesign cycle
The invention discloses a full-working condition performance prediction method for a compressor, and aims at providing a rapid and accurate full-working condition aerodynamic performance prediction method so as to increase the design and optimization efficiency of the compressor. In the method, a formula is established by taking parameters of a design point as the reference to predict the flow, the efficiency and the overall pressure ratio of an off-design working condition; in a flow prediction method, firstly, the flow of the design point is converted according to an empirical formula to flow corresponding to a peak efficiency point at different rotating speeds, and then, blocking flow and surging flow at respective rotating speeds are calculated; in an efficiency prediction method, firstly, the efficiency of the design point is converted according to the empirical formula to peak efficiency at different rotating speeds, and then, the efficiency at different rotating speeds is calculated according to an elliptic piecewise approximation method; and in a prediction method for the overall pressure ratio, work factors at different rotating speeds and different flow are calculated according to the thought of the equivalent width of an impeller exit, and the work factors are combined with current efficiency to obtain the overall pressure ratio. By applying the full-working condition performance prediction method to design and optimization of the compressor, the design cycle can be remarkably shortened, and the design cost is reduced.
Owner:TIANJIN UNIV
Flight Delay Prediction and Spontaneity Analysis Method Based on asm
ActiveCN110009939BImprove service qualityFully considerForecastingDesign optimisation/simulationDelay spreadSimulation
The present invention proposes an ASM-based flight delay prediction and spillover analysis method. First, facing the problem of delay prediction, an MNR model is constructed to predict the delay by using information such as flight message data, departure time at the front station of the aircraft, aircraft type, whether there are VIPs, etc. Flight arrival time; secondly, facing the problem of delay contagion, use MPM to construct the symmetric model ASM of delay contagion, and define the concept of deformation gradient. If the deformation gradient is less than 0, it proves that the flight is not affected by delay. Otherwise, it means that the flight comes from its own factors or Delays have occurred due to the influence of external factors; finally, if affected by the impact, the MNR is improved based on the ASM model, and the transfer factor is introduced into each parameter of the MNR model to analyze the delay impact. On the basis of the impact analysis, the flight delay time is updated in real time , the equation of arrival delay can be updated in real time, fully considering the delay spread problem, the obtained result is more accurate and the calculation is faster.
Owner:青岛民航凯亚系统集成有限公司
A Parameter Adaptive Trajectory Prediction Method for Mobile Nodes
InactiveCN104936289BPrecise positioningImprove accuracyNetwork topologiesLocation information based serviceClassical mechanicsControl theory
The invention relates to a mobile node parameter adaptive track prediction method. The influences of environmental factors on nodes under a dynamic sea condition are considered; the adaptability to a variable environment is fully considered specific to the requirement of a sea moving object on a positioning method; and the motion situations of beacon nodes are introduced into node motion track prediction. After a motion track is determined, a sampling region and a sample point weight are determined on the basis of an improved Monte Carlo method. Information about relative positions with one-hop and two-hop beacon nodes in the motion processes of unknown nodes is taken as a filter condition, so that the sampling rate, sampling speed and positioning accuracy are increased. The adaptive track prediction method can be established according to environmental changes. The motion tracks of the unknown nodes are predicted through effective utilization of the motion situations of sea area beacon nodes, and an improved Monte Carlo positioning method is put forward in combination with motion characteristics, so that the sea dynamic node positioning capability can be enhanced, and the sea search-rescue speed and success rate are increased.
Owner:SHANGHAI MARITIME UNIVERSITY
Treatment liquid for trivalent chromium conversion coating and treatment method of metal substrate
ActiveUS10260151B2Improve corrosion resistanceExcellent in corrosion resistance and scratch resistance and stabilityMetallic material coating processesChromium CompoundsOrganic acid
Owner:NIPPON HYOMEN KAGAKU KK
Target detection method and device applied to unmanned ship perception system
ActiveCN109117838BFulfil requirementsImprove detection accuracyCharacter and pattern recognitionNeural architecturesEngineeringArtificial intelligence
The invention discloses a target detection method applied to an unmanned ship perception system, comprising the following steps, step 1: collecting image data; step 2: performing preprocessing; step 3: building a neural network structure; The final image data is optimized; step five: through the judgment module, the accuracy of the data optimized in step four is tested. The data with the preset accuracy rate is sent to step six; step six: encapsulate the data; step seven: visualize the packaged data through the display module; step eight: according to the identification and analysis of the environment in the visual interface, adjust the wireless through the adjustment module The driving state of the ship. The invention can use a large amount of training data to enable the neural network to classify the photographed pictures according to "experience", so that the recognition accuracy is high, the real-time performance is good, and the robustness is good.
Owner:HARBIN INST OF TECH +1
A near-field measurement method and system for planar antennas with reduced truncation error
ActiveCN111366793BExtrapolation worksHigh engineering practical valueAntenna radiation diagramsPlanar antennasSoftware engineering
Owner:SHANGHAI HOLLYWELL ELECTRONICS SYST TECH
Feeder terminal converged communication method and device integrated with customer front-end equipment
ActiveCN114257344BAccurate calculationFully considerSecuring communicationInstrumentsFeeder lineMaster station
The present invention provides a feeder terminal fusion communication method and device that integrates customer front-end equipment, including: acquiring the FTU data transmission value of the serial port link in a first preset time period, and the first preset time period includes The first FTU transmission time point and the second FTU transmission time point; obtain the encryption delay time of the customer front-end equipment, and generate respectively based on the encryption delay time, the first FTU transmission time point and the second FTU transmission time point The first CPE transmission time point and the second CPE transmission time point; respectively generate a second preset time period based on the first CPE transmission time point and the second CPE transmission time point, and obtain communications within the second preset time period The CPE data transmission value of the link; the FTU data transmission value is input into the pre-fitted linear model to obtain the CPE data pre-measurement value, if the CPE data transmission value is the same as the CPE data pre-measurement value If the absolute value of the difference is greater than the standard value, a reminder message is sent to the master station side.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO +5
Method for realizing autonomous fault recovery after satellite is influenced by single particle
PendingCN113377561AEasy to adjustThe price is not smallProgram initiation/switchingNon-redundant fault processingSimulationSatellite
The invention discloses a method for realizing autonomous fault recovery after a satellite is influenced by a single particle. The method comprises the following steps: designing fault recovery program control instruction content which needs to be autonomously executed on the satellite; determining the longitude and latitude range of the satellite on-orbit task influenced by the single particle; setting constraint conditions of program control instruction execution; and obtaining a program control instruction time sequence by utilizing the program control instruction content and the program control instruction execution constraint condition, and uploading the program control instruction time sequence to the satellite. Based on the longitude and latitude range influenced by the satellite on-orbit task single particle, the method can quickly realize autonomous fault recovery after the satellite is influenced by the single particle by combining the program control instruction content and the execution constraint condition, and effectively prevents the satellite on-orbit task from being influenced by the single particle.
Owner:AEROSPACE DONGFANGHONG SATELLITE
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