简介：Allopticalnetworkbasedonwavelengthdivisionmultiplexingtransmissionsystemwithopticalcrossconnect(OXC)isanessentialapproachforopticalcommumications.CrosstalkintroducedbyOXC(speciallylargescaleone)isakeylimitingfactorforitscapacity.OpticalsignalpassingthroughatypicalOXCisanalyzedinthispaper,followedbydescriptionofthegenerationandeffectofintrabandcrosstalk.ThepowerpenaltiesinducedbyintrabandcrosstalkversusthenumberofmultiplexedwavelengthsMandthenumberofinputfibersNhavebeengivenbynumericalsimulations.TheresultsshowthatthecoherentcrosstalkisthemostcriticallimitationonOXCanddependsmorecloselyonthenumberofmultiplexedwavelengthsMthanthenumberofinputfibersN.Crosstalkissuppressedbydoublyfiltering,fixingoptimumdecision-thresholdandappropriatelychoosingthenumberofmultiplexedwavelengthsM.

简介：ThetheoreticalSpectralresponseformulaoftheN^+-N-I-P^+siliconphotodetectorwithhigh/lowemissionjunctionisgiven.Atthesametime,consideringtheprocessrequirements,theoptimunstructureparametersofsiliconphotodetectorareobtainedbynumericalcalculationandsimulation.Undertheconditionoftheseoptimumstructureparameters,theresponsivityofthesiliconphotodetectorwillbe0.48A/Wat650nm.

简介：Thebacktrackingsearchoptimizationalgorithm(BSA)isoneofthemostrecentlyproposedpopulation-basedevolutionaryalgorithmsforglobaloptimization.Duetoitsmemoryabilityandsimplestructure,BSAhaspowerfulcapabilitytofindglobaloptimalsolutions.However,thealgorithmisstillinsufficientinbalancingtheexplorationandtheexploitation.Therefore,animprovedadaptivebacktrackingsearchoptimizationalgorithmcombinedwithmodifiedHooke-Jeevespatternsearchisproposedfornumericalglobaloptimization.Ithastwomainparts:theBSAisusedfortheexplorationphaseandthemodifiedpatternsearchmethodcompletestheexploitationphase.Inparticular,asimplebuteffectivestrategyofadaptingoneofBSA’simportantcontrolparametersisintroduced.TheproposedalgorithmiscomparedwithstandardBSA,threestate-of-the-artevolutionaryalgorithmsandthreesuperioralgorithmsinIEEECongressonEvolutionaryComputation2014(IEEECEC2014)oversixwidely-usedbenchmarksand22real-parametersingleobjectivenumericaloptimizationbenchmarksinIEEECEC2014.Theresultsofexperimentandstatisticalanalysisdemonstratetheeffectivenessandefficiencyoftheproposedalgorithm.

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简介：AnewmodeltodescribeI-Vcharacteristicsoforganiclight-emittingdevices(OLEDs)isdevelopedbasedonexperimentalresults.ThedependenceofI-Vcharacteristicsonenergybarrier,trapdensityandcarriermobilityisanalyzed.TheresultshowsthatthismodelcombinestheFowler-Nordheimtunneltheoryandthetrapchargelimitedcurrenttheorywithexponentialtrapdistribution(TCL),anditdescribesthecurrenttransportcharacteristicsofOLEDsmorecomprehensively.TheI-VcharacteristicsfollowFowler-Nordheimtheorywhentheenergybarrierishigh,thetrapdensityissmallandthecarriermobilityislarge.InothercasestheyfollowtheTCLtheory.

简介：一光谱在波长部门multiplexing分析嗯做波导放大器(EDWA)的数值分析法被介绍。这个模型基于道格拉斯计划修改的有限差分横梁繁殖方法，它能高效地减少截断误差和时间消费。由迭加为试验性的曲线的Lorentzian功能，EDWA的光谱特性能被调查。结果证明在980nm抽的EDWA的泵效率在1480nm比那高。由讲道理地增加泵长度和耳集中，同时，更大的信号获得能被获得。考虑theup变换和合作的跨松驰的效果，频谱分析高度，dopedEDWA在一条更宽的频带上被执行。

简介：Thetime-domainElectroMagnetic(EM)scatteringbyburiedobjectsindispersivemediaiscalculatedwithFD-TDmethod.TheFD-TDformulainDebyedispersivemedia(boththecomplexpermeabilityandthecomplexpermittivityaredescribedbyDebyeequations)arededuced,andtheabsorbingboundaryconditionisgiven.ThevalidityofFD-TDmethodinlossymediaisverifiedthroughcomparingtheFD-TD’sresultsandtheotherones.Thepropagationoftransientpulsesindispersivemediaisstudiedindetail.Thescatteringpulsesandthewiggletracesfortypicalburiedobjectsaregiven.

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简介：Thethermaldistortionofanopticalreflectorsurfaceduetothechangingsunlightinaspaceenvironmentwillcauseshiftandspreadingofitsreflectedfocusandtherebyinfluencetheperformanceofspace-to-groundlasercommunicationlinks.Basedonthecharacteristicsofaloworbitsatellite,thenormalshiftofaplanmirrorcausedbythermaldistortionisanalyzedwiththesoftwareoftheANSYSoffiniteelementanalysis.Ageneralexpressionofthetransmittedbeamfromadistortedreflectorsurfaceandacountingformulafortheshiftsofthefocuscenterbeforeandafterthermaldistortionarededuced.Theresultofsimulationshowsthatthemagnitudeorderofthenormalshiftoftheantennamirrorsurfacecanbeashighastensofμrad.Theworsethemirrorthermaldistortionis,thelargertheshiftofthereceivedfocuscenteris.Andthechangeoftheshiftsdoesnotobeyalinearrule.

简介：Anewmethodtoreducethenumericaldispersionofthethree-dimensionalAlternatingDi-rectionImplicitFinite-DifferenceTime-Domain(3-DADI-FDTD)methodisproposed.Firstly,thenumericalformulationsofthe3-DADI-FDTDmethodaremodifiedwiththeartificialanisotropy,andthenewnumericaldispersionrelationisderived.Secondly,therelativepermittivitytensoroftheartificialanisotropycanbeobtainedbytheAdaptiveGeneticAlgorithm(AGA).Inordertodemon-stratetheaccuracyandefficiencyofthisnewmethod,amonopoleantennaissimulatedasanexam-ple.Andthenumericalresultsandthecomputationalrequirementsoftheproposedmethodarecom-paredwiththoseoftheconventionalADI-FDTDmethodandthemeasureddata.Inadditionthere-ductionofthenumericaldispersionisinvestigatedastheobjectivefunctionoftheAGA.Itisfoundthatthisnewmethodisaccurateandefficientbychoosingproperobjectivefunction.

简介：Aclassofmodifiedparallelcombinedmethodsofreal-timenumericalsimulationarepresentedforastiffdynamicsystem.Bycombiningtheparallelismacrossthesystemwiththeparallelismacrossthemethod,andrelaxingthedependenceofstagevaluecomputationonsamplingtimeofinputfunction,aclassofmodifiedreal-timeparallelcombinedmethodsareconstructed.StiffandnonstiffsubsystemsaresolvedinparallelonaparallelcomputerbyaparallelRosenbrockmethodandaparallelRKmethod,respectively.Theirorderconditionsandconvergencesarediscussed.Thenumericalsimulationexperimentsshowthatthisclassofmodifiedalgorithmscangethighspeedandefficiency.

简介：TheproblemforcalculatingnearfieldsofEMradiationsystemsbyusingthefinitedifferencetimedomain(FD-TD)methodarediscussedandtheannularphasedarrayofdipoleantennashasbeensimulatednumericallybyuseoftheFD-TDmethod.Foratestrunthenearfieldandcurrentdistributionofthesingledipoleantennaarecalculated.Thenearfieldsoftheannularphasedarrayofdipoleantennasincentralregionfilledwithdeionizedwaterarecomputedandtheinteractionofnearfieldswithananatomically-basedinhomogeneousmodelofhumantorsoisconsideredaswell.

简介：以便完成更高光谱效率，在很少模式纤维的模式部门multiplexing(MDM)是一个新研究区域。这个想法包括联合限制系统的可完成的长度的intermodal延期和模式面对大量技术问题。这篇论文被指定在步索引很少模式纤维完成intermodal延期的分析。我们数字地分析纤维的所有参数，它能在很少模式纤维影响intermodal延期并且识别没有最大的intermodal延期的重要增加，能增加复合模式的数字的条件。

简介：纤维来源(EDSFS)过滤的宽带嗯做superfluorescent的分析正在使用长时期给由传播的啁啾的纤维栅栏矩阵方法。为我们稀释振幅需求和弄平的波长范围要求的EDSFS，求婚了是设计高效的如此的过滤器的关键因素。模拟结果证明如此的类型过滤器有足够的变细在输出弄平戏剧的增加在1529nm1的波长范围的放大自发的排放(ASE)由选择象啁啾的度那样的一致纤维过滤器参数的535nm，原来的时期，导致的索引变化，一些纤维过滤器，然后宽带EDSFS能被完成。