简介:TheadvantageofATMtechnologyforstatisticallymultiplexingnetworkresourcesbydifferentusersinvokesthecompetitionofnetworkresources.Thiscompetitionhassomedamagingeffectsonmessagetransmitting.TheresearchfortestingmethodsandtechnologyofATMisimportantforustodevelopATMnetworks,topromotetheirconstruction,toensurethatvariousATMdevicesprovidedbydifferentprovidersinteroperateproperlyandtoprovideexcellentservicesfortelecommunicationusers.Afterdiscussingtheabstracttestingmethodofconformancetestingandtheabstractdescriptionofprotocoltesting,thethesisputsforwardakindofabstracttestingconfigurationforATMtestingandakindofabstractdescriptionmethodfortestingcase.Fromtheangleofapplication,thethesisdiscussesthebasicrulesforATMtesting.Afterthat,thethesispointsoutthattheATMtestingmustbemadefromthefouraspectsofnormaltesting,conformancetesting,performancetestingandinteroperabilitytesting.Thegeneraltestingmethods,generalconfigurationandconnectionforATMtestingandtheselectionofATMtestingitemsarediscussed,respectively,inthefouraspects.CombinedwiththecharacteristicsofthetrafficssupportedbyATMsystems,thethesisdiscussesseveralkindsoftrafficmodelsforconductingATMtesting.Onthebasisofstudyingvarioustrafficmodels,theauthorclassifiestrafficmodelsforATMtestingasthreekinds:periodictrafficmodels,stochastictrafficmodelsandmanualtrafficmodels.Theparametersofdescribingtrafficmodelsandtheircalculatingmethodarediscussedinthethesis.Anewkindofperiodiccell-sequencetrafficmodelisproposedinthisthesis.Theperiodiccell-sequencetrafficmodelhasexcellentlinearlydescendingcharacteristicsinthecellinterval.ThetrafficmodelsdiscussedinthisthesiscanbeappliedtovariousATMtestingcases.Fromthepointofnormaltesting,physicallayertesting,ATMlayertesting,AALlayertesting,networkmanagementtesting
简介:Inthispaper,abroadbandmultimediaapplicationplatform,BaMAP,isintroduced.TheBaMAPaimstooffercontentandserviceprovidersagoodintegratedenvironmentforefficientcontentproduction,management,deliveryandsharing.Itsupportslarge-scalehierarchicalstorage,aswellasmechanismsforcontentdistributionandqueriesfromremotenodes.Theon-demandservice,partoftheBaMAP,offerstwoaccessinterfaces,DVB-CandIP,whichallowtheplatformtorunonmostoftheexistingaccessnetworks.
简介:Theapplicationofcellularneuralnetworks(CNN)forsolvingpartialdifferentialequations(PDEs)isinvestigatedinthispaper.TwokindsofthePDEs,theheat-conductionequationandPoisson'sdquation,areconsideredtobetypicalexamples.TheycanbecomputedinrealtimebyusingtheCNN,whiletheCNN'shardwareisimplementedbytheintegratedOP-AMP.Theexperimentalresultsshowthatthehardwareperformenceisinagreementwiththatgivenbythecomputersimulation.Therefore,theCNNisanewpowerfultoolforsolvingPDEs.
简介:这篇文章处理导致一个混合linear/non-linear模型评价问题的调遣目标追踪的问题。为调遣追踪系统,扩大了Kalman过滤器(EKF)或粒子过滤器(PF)传统地被用来估计状态。在这篇文章,排斥了粒子过滤器(MPF)处于一个混合linear/non-linear模型评价问题为申请被介绍。MPF是Kalman过滤器(KF)和PF的联合。它因此认为两个他们有利并且能被用于混合linear/non-linear基础,在有条件地线性的状态用KF被估计,非线性的状态用PF被估计的地方。模拟结果证明MPF保证评价精确性并且在调遣追踪申请的目标与PF和EKF相比减轻潜在的计算负担问题。
简介:Atpresent,chaoticcommunicationshavebeenwidelystudied.However,theseresearchesmainlyfocusonthebinarysystemswhiletheresearchesofM-arychaoticcommunicationsarenotextensive.Tochangethesituation,achaosM-arymodulationmethodbasedonphaseplanepartitionofHamiltonmapisproposed.Firstly,thechaoticmodelofHamiltonmapanditsphaseplanefeaturesaredescribed,andthenthewayofcreatingthechaosM-arymodulationisdiscussed.Next,toevaluatetheproposedmethod,thesystemsimulationresultsandanalysisaregiven.Finally,thechaosM-arymodulationmethodisappliedtocommunications.
简介:Aimingtotheestimationofsourcenumbers,mixingmatrixandseparationofmixingsignalsunderunderdeterminedcase,thearticleputsforwardamethodofunderdeterminedblindsourceseparation(UBSS)withanapplicationinultra-wideband(UWB)communicationsignals.ThemethodisbasedonthesparsecharacteristicofUWBcommunicationsignalsinthetimedomain.Firstly,findingthesinglesourceareabycalculatingtheratioofobservedsamplingpoints.Thenanalgorithmcalledhough-windowedmethodwasintroducedtoestimatethenumberofsourcesandmixingmatrix.Finallytheseparationofmixingsignalsusingamethodbasedonamendedsubspaceprojection.ThesimulationresultsindicatethattheproposedmethodcanseparateUWBcommunicationsignalssuccessfully,estimatethemixingmatrixwithhigheraccuracyandseparatethemixingsignalswithhighergaincomparedwithotherconventionalalgorithms.Atthesametime,themethodreflectsthehigherstabilityandthebetternoiseimmunity.
简介:Opticaltimedivisonmultiplexing(OTDM)isoneofthepromisinigwaysforthefuturehigh-speedopticalfibercommunicationnetworks.All-opticalswitchis,beingoneofthecoretechnologiesofOTDMsystemsandnetorks,crucialtorealizethevaroussignalprocessesincludingtime-divisiondemultiplexing,packerswitching,all-opticalregeneratingandsoon.Thisthesismainlystudiesvariousall-opticalswitchtechnologiesandtheirutilizationinthefieldsofall-opticalsignalprocessingsintheOTDMsystemsandnetworks.Themainjobsarelistedasfollows.(1)Anovelall-opticalultrafastdemultiplexingschemeusingthesolitonself-trappingeffectinbirefringentfiberisproposed.(2)ThedemultiplexingperformanceoftheNonlinearOPticalLoopMirror(NOLM)isthoroughlyanalyzedanditsoptimizationisfurtherdiscussed.(3)Theperformanceanalysisandtheconfigurationoptimizationoftheall-opticalswitchesbasedontheSemiconductorOpticalAmplifier(SOA)aresystematicallypresented.Thespeedlimitationoftheall-opticalSOAswitchesinducedbythefastgaindepletionofSOAisdiscussed,Besides,anovelSOAswitchisproposed,whichadoptstheasymmetricMach-ZehnderInterferomerterconfiguration.(4)The8×2.5Gb/sOTDMexperimentaltransmissionsystemalong105kmstandardfiberisrealizedusingtheNOLMdemultiplexer.(5)TheNOLMswitchisusedtorealizetheall-optical3Rregenerationof2.5G/sReturn-to-Zerosignal.(6)ThefeasibilityandlimitationoftheallopticalSOApacketswitchisdiscussed.AndadevelopedMZIconfigurationofSOApacketswitchisfurthershowntoimprovethepackerswitchingperformance.Finally,anall-opticalpacketdroppingnodesuitableinthenetworkswithringorbusconfingurationandanall-opticalpacketswithcingnodeintheShuffleNetnetworksareproposedtoshowthefeasibilityofall-opticalpacketswitchingthroughcombiningtheall-opticalswitchesandthereasonablelogicdecisions.
简介:在这份报纸,一个可伸缩的基于连接的流动控制计划为应用相关的network-on-chip(NoC)被建议。建议计划利用NoC,也就是交通的可预测性和丰富的电线资源的二个特殊特征,到完成重要表演改进。首先,爆炸注射数据被调整进经常的数据溪流,一个基于连接的方法被用来保证所有连接没在任何时间被过载。因而,在网络的包的数字被减少,导致减少的拥挤可能性并且改进了通讯性能。第二,中央控制器的简单体系结构被建议保证建议计划有小区域开销并且是可伸缩的。模拟结果证明与传统的switch-to-switch(圣)相比,流动控制计划和分配前基于流动控制计划,建议计划极大地增加产量并且与合理区域和精力开销砍倒平均潜伏。