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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：Byanalyzingthethreshold-jumpingofSchmittcircuits,thispaperindicatesthatthecoreelementrealizingthisfunctioninbinaryTTLSchmittcircuitsisthedifferentialcurrentswitchwithcontrollablethreshold.Basedonthecharacteristichavingtwokindsofsignal-detectionthresholdinternaryTTLcircuits,aternaryTTLSchmittcircuithavingtwicereactionsofthreshold-jumpingisdesigned.ThesimulationwithPSPICEprovesthatthedesignedcircuithasidealfunctionofSchmittcircuits.

简介：Inbandpasssigmadeltamodulator,resonatoristhekeyblock.Thispaperproposedanewresonatorwhichcansimplifythecircuitimplementationwhendesigningbandpassmodulatorwithlowpassprototype.Theeffectoffinitegain,finitebandwidth,andpathmismatchontheresonatorisanalyzed.ThefunctionoftheproposedresonatorandthedeviredequationsaboutpathmismatchhavebeenverifiedbyswitchedcapacitorsoftwareSWITCAP.

简介：Inthispaper,theperfectdyadicbinarysequencepairwithone-valuedyadiccorrelationfunctionsispresented.Thatis,theperfectdyadicbinarysequencepairisaperfectdiscretesignal,foritsdyadicrelativefunctionisδ-function.Thetransformationfeaturesandsomeexistingadmissibilityconditionsofperfectdyadicbinarysequencepairarediscussed,andthepropertiesforthiskindofcodeinWalshtransformationspectrumandweightspectrumarealsoanalyzed.Fromabove,Itisfoundthattheperfectdyadicbinarysequencepaircaneasilydifferentiatefromitsdyadicshifting.Sothesegoodsignalscanusedinengineeringassynchronizationcode,multi-usercodeandsoon.

简介：由于TSP和电信服务的差异的复杂性在中国测量电信服务价格(TSP)的全部的变化是困难的。这篇文章分析在电信服务收入和电信服务的交通体积之间的关系并且推出在电信价格的趋势测量全部的变化的方法，它基于消费者“s为电信服务的实际支付。在从1949～2000与时间系列数据描述TSP的变化趋势以后，TSP显示出连续衰退趋势during1949～1975。相反，TSP出现了从1976～1991的一个升起的趋势和在1992以后的一个锋利的衰退趋势。实验测试和电信改革的实际背景支持结果。

简介：就在人们苦思冥想移动电话可能具有的每一种功能和特征时，“杀手级应用”一一移动电视出现了，移动电视的出现为一大批其他行业，例如广播公司、内容提供商以及广告公司提供了进入无线通信领域的机会。

简介：Theconceptofnetworkcentricwarfare(NCW)anditscharacter,highrequirementofreal-timesynchronizationareintroduced.Thedistributedequal-nodenetworkarchitectureinNCWispresented.Basedontheoreticalanalysisonethemetinterfaceperformance,thispaperpresentsthatforwardinglatencybetweenethemetinterfacedevicesisakeyinfluencefactorofreal-timesynchronizationinNCW.Ethemetfundamentalisbrieflyintroduced.Themodelbetweenaswitchundertest(SUT)andasmartbitscardispresentedandusedfortwointerconnectingswitchesinNCW.Onconditionthatignoringthelatencyofconnectingfiberortwistedpairsandprocessinglatencyofthesmartbitstestsystem,thispaperpresentsthatdockfrequencytolerance(CFT)betweenaSUTandasmartbitscardisaleadinginfluencefactorofforwardinglatencyofanethemetswitch.TheformulaetocalculateinternalforwardinglatencyandforwardinglatencycausedbyitsCFTarededuced.TheoreticalcalculationonforwardinglatencyofanethemetswitchbasedonthegivenCFTandtesttimeisimplemented.ExperimentalstudyonprimaryforwardinglatencyandsecondaryforwardinglatencyisimplementedandforwardinglatencybetweentheSUTandthesmartbitscardismeasured,thustestifyingtheaccuracyoftheabovetheoreticalanalysisthattheCFTisakeyinfluencefactorofforwardinglatency.ThemeasurestosatisfytheneedsofforwardinglatencyinNCWarepresented.

简介：Inthispaper,thecauseofbit-errorisanalyzedwhendataaredecidedintheopticalreceiver.AmonolithicD-ffdecisioncircuitisdesigned.Itcanworkeffectivelyat622Mb/s.Moreover,adecisionmethodofparallelprocessingtoimprovethddecisionspeedispresented,throughwhichtheparallelcircuitcanworkupto1Gb/susingthesamemodel.Withthetechnique,higher-speeddatacanbedecidedbyusinglowerspeeddevice.

简介：Inthispaper,usedBSO(Bi12SiO20)crystalasahologramrecordingmaterial,TV-cameraasadetector,andaholographicsetupcontrolledbyacomputer,automaticallycalculatinghologramof3-interferogramsmethodistheoreticallyandexperimentallystudied.Thisnewholographicrecordingmaterialandautomaticallycalculatinghologrammakeitpossibletousereal-timeholographyinanindustry.Asapracticalexample,theshrinkingof2-componentsadhesivein4hismeasured.

简介：Theeffectsofthevariationsinfiberlength,fibermirrorreflectanceonefficiencyandoutputpowerareexperimentallyinvestigatedforerbium-dopeddoublepassbackwardsuperfluorescentfibersources(SFSs).Theinfluenceoffiberlengthonmeanwavelengthstability(MWS)hasalsobeendemonstrated.Byincorporatingashortsectionofun-pumpederbium-dopedfiber(EDF)attheoutputport,thepumppowerdependentonMWSbecomesindependentofpumpedEDFlength.Thisisanovelphenomenonthathasn'tbeenreporteduptonow,andshouldbehelpfultoSFSfabricationandtheoryanalysis.ByusingafiberMichelsoninterferometerasspectrumslicingcomponent,amulti-wavelengthfibersource(MWFS)with～20channels(from1542nmto1559nm)isgot.TheMWFShasachannelspacingof～0.8nmwhichsatisfiesITU-standard.Theintensityfluctuationamongchannelsislessthan0.5dB,andtheextinctionratioofallchannelsisabove14dB.ThiskindofMWFSshouldbeusefultowavelengthdivisionmultiplexingsystems.

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简介：自从第二十个世纪的最后十年起，无线电信比固定电信以快速的步发展了。这篇文章分析无线活动电信由采用替换和经济计量学模型的正常理论用代替固定电信的效果。分析结果与现实一致，并且在无线、修理的电信工业之间的关系从是补足的在的状态变化了，这被观察了早持续第二十个世纪的十年到目前被代替的。而且，特别在无线区域的电信技术的提高的进步充实顾客“以从而改变他们的通讯风格的多媒体内容要求，它显著地支持无线活动通讯的快速的生长并且加强代用品的效果。

简介：合作路由技术能高效地由创始地选择合作节点提交数据改进网络的性能。在这篇文章，合作路由算法基于三个不同criteria:optimal隧道状态，最大的留下精力，和最短的路径被建议并且实现。模拟基于网络模拟(NS)把建议算法的表演与non-cooperativedestination-sequenced距离作比较--向量(DSDV)协议。结果表明合作算法以牺牲可接受的规范的网络负担的成本与特殊获得超过DSDV路由协议。

简介：Thedesignofternaryedge-triggeredJKL-typeflip-flopisproposed.ThecomputersimulationandthetestinexperimentalcircuitmadeupwithTTLgateshowthisflip-flophastheexpectedlogicfunctions.

简介：Thisletterproposestwoalgorithms:anovelQuantumGeneticAlgorithm(QGA)basedontheimprovementofHan'sGeneticQuantumAlgorithm(GQA)andanewBlindSourceSeparation(BSS)methodbasedonQGAandIndependentComponentAnalysis(ICA).ThesimulationresultshowsthattheefficiencyofthenewBSSmethodisobviouslyhigherthanthatoftheConventionalGeneticAlgorithm(CGA).

简介：P.M.Djuric,etc.(1992)researchedonthesegmentationofnonstationarystochasticprocessintopiecewisestationarystochasticprocessbyBayesiancriterion,andgaveadynamicequationaboutthenumberofsegments,theirboundariesandARmodelordersforeachsegment,butdidnotgivedetailedsolutionfortheequation.Becausethesolutionfortheequationisverycomplex,thispaperinvestigatesthesolution,derivessomerecursiverelations,simplifiestheproblem,savescomputationtimeandgoesfurtherintothesegmentationofnonstationarystochasticprocessintopiecewisestationarystochasticprocess.

简介：Thispapermainlystudiestheinfluenceoftherelativepositionoftarget-sensorsonthetrackingaccuracyoflongrangeairplane.Fromtheoryanalysisandsimulationresults,itisfoundthatthetrackingaccuracyoflong-rangeairplanecanbeimprovedgreatlyiftheextantsensorsarerationallyplacedandmulti-sensordatafusiontechniqueisusedinthecaseofand

简介：BasedonimprovedchargecontrolmodelandcombiningGSWvelocity-fieldequa-tion,aseriesofanalyticalsolutionsforthestaticcharacteristicsofHIGFETssuchasID-VD-VG,IDS-VG,GmandCGarederived.Theresultsofcalculationarecomparedwithexperimentaldatareportedinreferences,withintherangeofVG<2V,ID

简介：Thedevicestructureandtechnicalprocessingsofquasi-planarself-alignedsiliconavalancheelectronemissionarrayarcintroduced.Theprocessingstepattheedgeofelectronemissionregionisabout10nmonlyandthewidthofself-alignedcurrentchannelofshallowAsimplantationisabout3μm.ItsI-Vcharacteristicsshowalargerlinearregionandlowerseriesresistancethanthatoftheprevioussiliconavalancheelectronemissiondevices.Someoftheelectronemissioncharacteristicsarealsodiscussedinthispaper.