学科分类
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68 个结果
  • 简介:ThisletteranalyzesthereasonswhytheknownNeuralBackPromulgation(NBP)networklearningalgorithmhasslowerspeedandgreatersampleerror.Basedontheanalysisandexperiment,thetraininggroupdescendingEnhancedCombinationAlgorithm(ECA)isproposed.TheanalysisofthegeneralizedpropertyandsampleerrorshowsthattheECAcanheightenthestudyspeedandreduceindividualerror.

  • 标签: 学习算法 神经反向传播网络 NBP 混合增强算法 ECA
  • 简介:AdmissioncontrolplaysanimportantroleinprovidingQoStonetworkusers.Motivatedbythemeasurement-basedadmissioncontrolalgorithm,thisletterproposedanewadmissioncontrolapproachforintegratedservicepacketnetworkbasedontrafficprediction.Intheletter,FARIMA(p,d,q)modelsintheadmissioncontrolalgorithmisdeployed.AmethodtosimplifytheFARIMAmodelfittingprocedureandhencetoreducethetimeoftrafficmodelingandpredictionissuggested.Thefeasibility-studyexperimentsshowthatFARIMAmodelswhichhavelessnumberofparameterscanbeusedtomodelandpredictactualtrafficonquitealargetimescale.Simulationresultsvalidatethepromisingapproach.

  • 标签: 接纳控制 网络用户 服务质量 通信量 预测
  • 简介:SurvivabilityisoneoftheimportantissuesinATM-basednetworkssineevenasinglenetworkelementfailuremaycauseaseriousdataloss.Thispaperintroducesanewrestorationmechanismbasedonmulti-layerATMsurvivablenetworkmanagementarchitecture.ThismechanismintegratesthegeneralcontrolandrestorationcontrolbyestablishingtheWorkingVPslogicalnetwork,BackupVPslogicalnetworkandsparelogicalnetworkinordertooptimallyutilizethenetworkresourceswhilemaintainingtherestorationrequirements.

  • 标签: 异步传输模式 可生存性 恢复 集中控制
  • 简介:Aclassoflarge-sealesystems,wheretheoverallobjectivefunctionisanonlinearfunctionofperformanceindexofeachsubsystem,isinvestigatedinthispaper.Thistypeoflarge-scalecontrolproblemisnon-separableinthesenseofconventionalhierarchicalcontrol.Hierarchicalcontrolisextendedinthepapertolarge-scalenon-separablecontrolproblems,wheremultiobjectiveoptimizationisusedasseparationstrategy.Thelarge-scalenon-separablecontrolproblemisembedded,under;ertainconditions,intoafamilyoftheweightedLagrangianformulation.TheweightedLagrangianformulationisseparablewithrespecttosubsystemsandcanbeeffectivelysolvedusingtheinteractionbalanceapproachatthetwolowerlevelsintheproposedthree-levelsolutionstructure.Atthethirdlevel,theweightingvectorfortheweightedLagrangianformulationisadjustediterativelytosearchtheoptimalweightingvectorwithwhichtheoptimaloftheoriginallarge-scalenon-separablecontrolproblemisobtained.Theoreticalbaseofthealgorithmisestablished.Simulationshowsthatthealgorithmiseffective.

  • 标签: LARGE-SCALE system HIERARCHICAL control MULTI-OBJECTIVE optimization.
  • 简介:Anewmethodforanalyzingdynamicsofcontinuousneuralnetworksisproposed,andthenecessaryconvergenceconditionsforaclassofassociativenetworksareobtained.Basedonthestabilitycriterionandtheequationsofequilibriumsetofthenetwork,synthesisofaclassofassociativeneuralnetworksisgiven.Thestabilitycontrolmodelofasymmetricunstablenetworksissuggested,whichisalsoavalidwayforoptimizationanddynamiccontrolofstableneuralnetworks.

  • 标签: CONTINUOUS NEURAL networks ASYMMETRIC INTERCONNECTION ASYMPTOTICALLY
  • 简介:DespiteextensiveresearchonR-trees,mostoftheproposedschemeshavenotbeenintegratedintoexistingDBMSowingtothelackofprotocolsofconcurrencycontrol.R-linktreeisanacceptabledatastructuretodealwiththisissue,butproblemslikephantomstillexist.Inthispaper,wefocusonaconflictdetectionschemebasedonR-linktreeforcompleteconcurrencycontrol.Anin-memoryoperationcontrollistisdesignedtosuspendconflictingoperations.Themainfeaturesofthisapproachare(1)itcanbeimplementedeasilyanddoesnotneedanyextrainformation;(2)Nodeadlocksareinvolvedinlockingscheme;(3)Non-conflictingoperationsarenotrestricted;and(4)PhantomproblemsinR-linktreeareavoidedthroughbeforehandpredication.Theexperimentresultsshowthatthisschemeiscorrectandgainsbettersystemperformance.

  • 标签: 冲突探测 协作控制 R联接树 幻想 多维数据结构
  • 简介:Amethodforfabricationofultravioletinducetransmission(IT)filterbyvisiblelightcontrolinanordinaryvacuumispresented.Manufacturingprinciplesandtechniquesaredisscussed.MeasuredspectraltransmittancecurvesofmakingultravioletITfilterbythismethodaregiven.

  • 标签: 光学涂层 沉积过程 传输过滤器 紫外线 真空
  • 简介:Amajordifficultyinmultivariablecontroldesignisthecross-couplingbetweeninputsandoutputswhichobscurestheeffectsofaspecificcontrollerontheoverallbehaviorofthesystem.Thispaperconsiderstheapplicationofkernelmethodindecouplingmultivariableoutputfeedbackcontrollers.Simulationresultsarepresentedtoshowthefeasibilityftheproposedtechnique.

  • 标签: 支撑向量回归 kernel回归 去耦 多元控制系统
  • 简介:Theforcesensingresistor(FSR)anditsconstructionandcharacteristicaredescribed.Byusingtheoptimalelectronicinterface,theendresultwhichisadirectproportionalitybetweenforceandvoltageisobtained.Thecircuitsofapplicationforforceandpositionmeasurementsintheroboticcontrolaregiven.TheexperimentthatFSRsareplacedonthefingersofBH-1dexteroushandastactilesensorstomeasurethecontactingforcesshowsFSR'sforcesensitivityisoptimizedforuseinthecontrolofrobotcontactingwithenvironment.

  • 标签: 电阻器 强制测量 半导体 检测技术 接触式 传感器
  • 简介:Astate-dependentroutingalgorithmbasedontheneuralnetworkmodel,whichtakesadvantageofotherdynamicroutingalgorithmforcircuit-switchednetwork,isgivenin[1].ButtheAlgorthmin[1]isacentralizedcontrolmodelwithcomplexO(N^7),therefore,isdiffculttorealizebyhardware.Asimplifiedalgorithmisputforwardinthispaper,inwhichroutingcanbecontrolleddecentralizekly,anditscomplexityisreducedtoO(10N^3).Computersimulationsaremadeinafullyconnectedtestnetworkwitheightnodes.TheresultsshowthatthecentralizedcontrolmodelhasveryeffectiveperformancethatcanmatchRTNR,andthecentralizedcontrolmodelisnotasgoodasthecentralizedonebutbetterthanDAR-1.

  • 标签: 神经网络 电路交换网络 动态路由选择 分布式控制
  • 简介:Anoptimalpreviewmethodisappliedtothedesignofterrainfollowingcontrollerforcruisemissile.Inthismethod,trackingerrorsandcontrolincrementsarebothconsideredinthequadraticcostfunction.Integratingthegeneraloptimalservosystemwithapreviewfeedforwardcompensationthatfeedsforwardfuturecommandandfuturedisturbanceproducesanoptimalpreviewservosystem.Intheterrainfollowingsystem,theflightaltitudeofthecruisemissileisacommandsignal,anditsfutureinformationcanbeknownapriori.Hence,wehavedesignedaterrainfollowingcontrollerwithabasicstatefeedbackandafeedforwardcompensationforfuturealtitudeinformation.Simulationresultsshowthattheperformanceoftheterrainfollowingsystemwithsuchanoptimalpreviewcontrollerhasbeenimproveddramatically.

  • 标签: CRUISE missile TERRAIN following PREVIEW control
  • 简介:ThisletterproposesaratecontrolalgorithmforH.264videoencoder,whichisbasedonblockactivityandbufferstate.ExperimentalresultsindicatethatithasanexcellentperformancebyprovidingmuchaccuratebitrateandbettercodingefficiencycomparedwithH.264.ThecomputationalcomplexityofthealgorithmisreducedbyadoptinganovelblockactivitydescriptionmethodusingtheSumofAbsoluteDifference(SAD)of16×16mode,anditsrobustnessisenhancedbyintroducingafeedbackcircuitatframelayer.

  • 标签: 视频编码 H.264标准 速率控制 MPEG
  • 简介:基于测量的承认控制(MBAC)算法为放松的即时服务被设计。与传统的连接承认控制机理相对照,MBAC算法的最吸引人的特征是它不要求一个优先的交通模型并且是很困难的让用户在建立流动前找到一个紧密的交通模型。MBAC的另外的优点包括那它能完成到用户的更高的网络利用和提议质量服务。在这篇文章,在MBAC的方程的学习证明他们都能在一样的形式被表示。基于一样的形式,仅当他们满足一些条件,一些MBAC算法能完成一样的性能。

  • 标签: 允许控制 MBAC 测量过程 实时服务
  • 简介:Thispaperdescribesamodifiedspeed-sensorlesscontrolforinductionmotor(IM)basedonspacevectorpulsewidthmodulationandneuralnetwork.AnElmanANNmethodtoidentifytheIMspeedisproposed,withIMparametersemployedasassociatedelements.TheBPalgorithmisusedtoprovideanadaptiveestimationofthemotorspeed.Theeffectivenessoftheproposedmethodisverifiedbysimulationresults.TheimplementationonTMS320F240fixedDSPisprovided.

  • 标签: INDUCTION motot Speed-sensorless FIELD orientated control