学科分类
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11 个结果
  • 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

  • 标签: ATM 异步传输模式 测试 调查
  • 简介:Inthispaper,abroadbandmultimediaapplicationplatform,BaMAP,isintroduced.TheBaMAPaimstooffercontentandserviceprovidersagoodintegratedenvironmentforefficientcontentproduction,management,deliveryandsharing.Itsupportslarge-scalehierarchicalstorage,aswellasmechanismsforcontentdistributionandqueriesfromremotenodes.Theon-demandservice,partoftheBaMAP,offerstwoaccessinterfaces,DVB-CandIP,whichallowtheplatformtorunonmostoftheexistingaccessnetworks.

  • 标签: 多媒体 BaMAP 应用平台 视频点播
  • 简介:关联向量机器(RVM)的普通信号分类的一条新途径基于向量机器(SVM)和RVM被比较并且分析的支持的核方法被介绍,二发信号分类器。信号的开始的几个柔韧的特征作为分类器的输入被提取,然后,内核思维被用来隐含地印射特征向量到高维的特征空格,和多班RVM和SVM分类器被设计完成AM,CW,SSB,MFSK和MPSK信号识别。模拟结果看了那什么时候选了有的合适的参数,RVM和SVM为可比较的精确性,但是RVM有更少的学习时间和基础功能。RVM的分类速度比SVM快得多。

  • 标签: 分类方法 信号调制 内核 SVM分类器 支持向量机 应用
  • 简介:Theapplicationofcellularneuralnetworks(CNN)forsolvingpartialdifferentialequations(PDEs)isinvestigatedinthispaper.TwokindsofthePDEs,theheat-conductionequationandPoisson'sdquation,areconsideredtobetypicalexamples.TheycanbecomputedinrealtimebyusingtheCNN,whiletheCNN'shardwareisimplementedbytheintegratedOP-AMP.Theexperimentalresultsshowthatthehardwareperformenceisinagreementwiththatgivenbythecomputersimulation.Therefore,theCNNisanewpowerfultoolforsolvingPDEs.

  • 标签: 偏微分方程 细胞神经网络 硬件实现
  • 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。

  • 标签: 跟踪问题 粒子滤波器 应用 手模型 非线性模型 机动目标跟踪
  • 简介:这份报纸基于距离几何学(DG)建议了一个新奇无线地点算法在信号的到达(TOA)的时间过滤的限制(也就是作为DG-TOA)。观察数据过滤并且处理并且基于DG-TOA算法导致数学公式被用于地点,也玩关键规则。模拟结果证明建议DG-TOA算法能提供更多的有效观察数据并且比的更精确最不方形的估计(LSE)算法在稠密,多线路,有变化评价错误的室内的情形。

  • 标签: 滤波算法 距离几何 定位算法 公式应用 几何约束 超宽带
  • 简介:Atpresent,chaoticcommunicationshavebeenwidelystudied.However,theseresearchesmainlyfocusonthebinarysystemswhiletheresearchesofM-arychaoticcommunicationsarenotextensive.Tochangethesituation,achaosM-arymodulationmethodbasedonphaseplanepartitionofHamiltonmapisproposed.Firstly,thechaoticmodelofHamiltonmapanditsphaseplanefeaturesaredescribed,andthenthewayofcreatingthechaosM-arymodulationisdiscussed.Next,toevaluatetheproposedmethod,thesystemsimulationresultsandanalysisaregiven.Finally,thechaosM-arymodulationmethodisappliedtocommunications.

  • 标签: 混沌通信 调制方法 多进制 应用 哈密尔顿图 双星系统
  • 简介:这篇论文提供复合条件质问(CCQ)和基于空格从踪迹代数学导出的踪迹信息使用要求引导的一个形式化方法的应用程序问题的一个形式化的定义。与解决CCQ的应用程序问题的形式化的进程,CCQ的申请的正式要求说明被给,一形式化,到正式要求说明的要求引导的结果的自动印射被执行,软件系统模型和应用程序代码被开发。通过住房信息上的全面质问的一个样品应用程序,可行性形式化,为CCQ的应用程序问题的自动软件开发被证明。结果关于形式化和自动软件开发为另外的问题有重要含意。

  • 标签: 应用程序代码 复合条件查询 软件开发 需求获取 信息空间 形式化方法
  • 简介:Aimingtotheestimationofsourcenumbers,mixingmatrixandseparationofmixingsignalsunderunderdeterminedcase,thearticleputsforwardamethodofunderdeterminedblindsourceseparation(UBSS)withanapplicationinultra-wideband(UWB)communicationsignals.ThemethodisbasedonthesparsecharacteristicofUWBcommunicationsignalsinthetimedomain.Firstly,findingthesinglesourceareabycalculatingtheratioofobservedsamplingpoints.Thenanalgorithmcalledhough-windowedmethodwasintroducedtoestimatethenumberofsourcesandmixingmatrix.Finallytheseparationofmixingsignalsusingamethodbasedonamendedsubspaceprojection.ThesimulationresultsindicatethattheproposedmethodcanseparateUWBcommunicationsignalssuccessfully,estimatethemixingmatrixwithhigheraccuracyandseparatethemixingsignalswithhighergaincomparedwithotherconventionalalgorithms.Atthesametime,themethodreflectsthehigherstabilityandthebetternoiseimmunity.

  • 标签: 盲源分离 通信信号 应用程序 超宽带 混合矩阵 混合信号
  • 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.

  • 标签: 全光切换 包交换 去复用方法 光时分复用
  • 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。

  • 标签: 流量控制 应用程序 可扩展 网络芯片 连接 控制计划