简介：ＯＮＢＡＮＤＷＩＤＴＨＳＵＭＳＯＦＧＲＡＰＨＳＹＡＯＢＩＮＧ（姚兵）；ＷＡＮＧＪＩＡＮＦＡＮＧ（王建方）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＮｏｒｉｈｗｅｓｔｅｔｅｒｎＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｌａｎｚｈｏｕ７３００７０，Ｃｈｉ...

简介：Weproposeandexperimentallydemonstrateanoveltypeofpolarizationrotatorthatiscapableofrotatingthepolarizationplaneofalinearlypolarizedlightatanydesiredangleineitherbroadornarrowspectralbandwidth.Therotatorcomprisesanarrayofstandardhalf-waveplatesrotatedatspecificangleswithrespecttotheirfast-polarizationaxes.Theperformanceoftherotatordependsonthenumberofindividualhalf-waveplates,andinthispaperweexperimentallyinvestigatetheperformanceoftwocompositerotatorscomprising6and10half-waveplates.

简介：Abstract.LetGbeasimplegraph.ThecyclicbandwidthsumproblemistodeterminealabelingofgraphGinacyclesuchthatthetotallengthofedgesisassmallaspossible.Inthispaper,someupperandlowerboundsoncyclicbandwidthsumofgraphsarestudied.

简介：Anewpolarizationgatingisdemonstratedbyourprinciple-of-proofexperiment,whichistheoreticallyproposedtogeneratetheisolatedordoubleattosecondpulseswiththemulti-cycledrivinglaserpulseinthepreviouswork[OpticsExpress.20,5196(2012)].Intheexperiment,thepolarizationgatingisformedbytwoorthogonally-polarizedlinearlychirpedmulti-cyclelaserpulses,andthespectralbandwidthsoftheharmonicsarebroadenedbymorethantwotimes,whichagreewiththeprevioustheoreticalwork.

简介：AkindofDynamicFullBandwidthUtilized(DFBU)allocationalgorithmisintroduced.Thisalgorithmallowsasinglelinktousebandwidthfarbeyonditsfairsharebandwidthinamulti-servicepackettransportingsystem.Threeimportantparametersastheboundonmaximumandminimumbandwidth,themaximumpacketdelayandtheminimumbandwidthutilizationarediscussedandanalyzed.ResultsofexperimentsshowthattheDFBU-algorithmiscapableofmakingasinglelinkinthesystemtouseallthesparebandwidth(uptofull-bandwidth)whiletheperformanceoffairnessandQoSrequirementisstillguaranteed.

简介：Thisletterintroducesthedesignideas,simulationandtestresultsofanS-bandklystronwithbandwidthof11%,whichwasdevelopedbytheInstituteofElectronics,ChineseAcademyofSciences(IECAS).Onthepeakpowerlevelof800kW,theefficiencyofklystronismorethan30%;thegainismorethan41dB;theequal-drivingrelativeinstantaneousbandwidthisover11%;theaveragepowerislargerthan8kW,andthepowerfluctuationwithinbandwidthislessthan1.5dB.

简介：二种紧缩的电磁的乐队差距(EBG)结构被设计。与生气螺线形状线电感器和interdigital电容器设置的二层协议EBG结构首先被介绍。因为它的显著地扩大的相等的引导者和电容，格子的时期是约4.5%空间波长。由insetting，几在扎根的飞机缩小裂缝，主要bandgap的带宽被将近19%提高。进一步的努力为设计三层协议EBG结构被作了。模拟结果证明它的时期被大约26%与的相比减少建议主要bandgap的二层EBG结构，和带宽作为的是大约3次建议了二层EBG结构。包括二层的详细图案压缩3(有或没有缺点地面飞机和EBG数组被给的三层和模拟的7EBG数组结果被介绍。

简介：以便改进传播精确性和在事情(IoT)的因特网察觉到并且激活信号的效率并且保证系统稳定性，一个适应资源分配算法被建议，它动态地根据他们的信号频率域特征在部件之中分配网络带宽和优先级。一遥远察觉到并且控制无人的地面的车辆(UGV)路径追踪试验台被开发，追踪错误信号的多重UGV为表演评估在模拟被测量。与一样的网络带宽限制，建议算法能减少的结果表演积累并且UGV路径与常规静态的算法相比在超过60%追踪的最大的错误。

简介：Inthispaper,anenergyefficientbandwidthallocationschemeisproposedforwirelesscommunicationsystems.Anoptimalbandwidthexpansion(OBE)schemeisproposedtoassigntheavailablesystembandwidthforusers.Whenthesystembandwidthdoesnotreachthefullload,theremainingbandwidthcanbeenergy-efficientlyassignedtotheotherusers.SimulationresultsshowthattheenergyefficiencyoftheproposedOBEschemeoutperformsthetraditionalsamebandwidthexpansion(SBE)scheme.Thus,theproposedOBEcaneffectivelyassignthesystembandwidthandimproveenergyefficiency.

简介：Inthisarticle,weconsideraclassofkernelquantileestimatorswhichisthelinearcombinationoforderstatistics.Thisclassofkernelquantileestimatorscanberegardedasanextensionofsomeexistingestimators.Theexactmeansquareerrorexpressionforthisclassofestimatorswillbeprovidedwhendataareuniformlydistributed.Theimplementationoftheseestimatorsdependsmostlyonthebandwidthselection.Wethendevelopanadaptivemethodforbandwidthselectionbasedontheintersectionconfidenceintervals(ICI)principle.MonteCarlostudiesdemonstratethatourproposedapproachiscomparativelyremarkable.Weillustrateourmethodwitharealdataset.

简介：TheTwin-LoopAntenna(TLA)hasbeenwidelyusedbecauseofitsbroadbandpropertyandsimplyfeeding,andsomemodifiedstructureshavebeendevel-opedfromitsprototypebyChineseengineers.ButtheexactdesigntheoryforTLAaccord-ingtotheimpedancecalculationhasnotyetbeenpublished.Inthispaper,theimpedanceofloopinaTLAisanalysedandcomputedbyusingthemethodofmoments,andthede-signformulaeandatwo-stepoptimizationprogramforextendingthebandwidthofinputimpedanceofTLAaredetailed.Anexampleofoptimizeddesignshowsthatthebandwidthcanbeincreasedupto36.4%forVSWR≤1.10,whichiswiderthanthebandwidthofra-diationpattern.

简介：Slowlight,atechnologytocontroltheopticalsignalbyreducingthegroupvelocity,hasbeenwidelystudiedtoobtainenhancednonlinearitiesandincreasedphaseshiftsowingtoitspromotingofthelight–matterinteractionability.Inthiswork,awidebandslowlightisachievedinasimpleone-dimensionalfishbonegratingwaveguide.Aflatbandindicatingslowlightwithagroupindexof13andbandwidthover10nmisobtainedbytheplanewaveexpansioncalculation,andthecorrespondingexperimentalresultsagreewellwiththetheoreticalprediction.Asteptaperisdesignedtocompensatethecouplingloss.Theproposedfishbonegratingwaveguideisagoodcandidateforwidebandslowlightdevicesinlightcommunication.

简介：与宽广带宽、分叉的横梁照亮的燃烧思考栅栏的远地的紧张和衍射效率被调查。什么时候光谱这个事件的宽度和分叉随经常的精力增加，最大的紧张减少，和一半微笑在最大的紧张的e-2的宽度变得更宽。甚至当事件光包含大量波长并且来自大量角度时，衍射效率没与合适的沟形状为燃烧栅栏有恶化。

简介：LargedistributedsystemssuchasComputational/DataGridsrequirelargeamountsofdatatobeco-locatedwiththecomputingfacilitiesforprocessing.Fromourworkdevelogpinascalabledistributednetworkcache.wehavegainedexperiencewithtechniquesnecessarytoachievehighdatathroughputoverhighbandwidthWideAreaNetworks(WAN).Inthispaper,wediscussseveralhardwareandsoftwaredsigntechniques,andthendescribetheirapplicationtoanimplementationofanenhancedFTPprotocolcalledGridFTP,WedescriberesultsfromtheSupercomputing2000conference.

简介：Wedemonstrateasilicon-basedmicrowavephotonicfilter(MPF)withflattoppassbandandadjustablebandwidth.TheproposedMPFisrealizedbyusinga10th-ordermicroringresonator(MRR)andaphotodetector,bothofwhichareintegratedonaphotonicchip.Thefullwidthathalf-maximum(FWHM)bandwidthoftheopticalfilterachievedatthedropportofthe10th-orderMRRis21.6GHz.Therippleofthepassbandislessthan0.3dB,whiletherejectionratiois32dB.Byadjustingthedeviationoftheopticalcarrierwavelengthfromthecenterwavelengthoftheopticalbandpassfilter,thebandwidthoftheMPFcanbegreatlychanged.Intheexperiment,theFWHMbandwidthoftheproposedMPFistunedfrom5.3to19.5GHz,andtherejectionratioishigherthan30dB.

简介：Animprovedmodelforultrasonictransducersisproposed.Byconsideringonlythefirstsymmetricmode,eachlayerisrepresentedasanacousticaltransmissionlineinmodelingofbulkwavetransducers.Inimagingapplications,widebandwidthandshorttimedurationarerequired.Theapproachwehaveusedconsistsofimpedancematchingthefrontfaceofthepiezoelectrictransducertothepropagatingmediumwithaquarterwavelengthimpedancematchinglayerandinsertinganunmatchingquarterwavelengthacousticallayerbetweentherearfaceandbackingmaterial.Aheavybackingwoulddegradethewide-bandphenomena,butshowatimedurationshorterthan0.5μsforimagingapplications.PSPICEcodeofthecontrolledsourcemodelisimplementedtopreciselypredicttheperformanceofthematchedtransducerssuchasimpedance,insertionloss,bandwidthanddurationoftheimpulseresponse.Goodagreementbetweenthesimulationandexperimentalresultshasbeenachieved.

简介：动态带宽分配(DBA)是在以太网被动光网络(EPON)的一个开、热的话题，它为下一代的存取networks.However被认为是最好的选择之一，大多数建议DBA计划忽略服务(QoS)的质量为在在上游的光下面的即时交通和下游的带宽利用的最大的延期和延期神经质上的保证在EPON.In的负担这份报纸，一个新DBA计划，QoS保证适应下游的带宽得到了利用(QoS-ADBU)，是pr

简介：Thispaperfocusesonthestabilityanalysisoftheactivedisturbancerejectioncontrol(ADRC)foraclassofuncertainsystems.ToovercomethedifficultyofdefiningareasonableLyapunovfunctionandsettinglimitationsofsystemparameters,theconverseLyapunovtheoremandthedisturbancetheoryareemployed.Thispaperprovesthattheestimationerroroftheextendedstateobserver(ESO)andthetrackingerroroftheclosed-loopsystemusingADRCareuniformlyultimatelyboundedandmonotonouslydiminishingwiththeincreaseoftheirrespectivebandwidth,sothatthestabilityoftheADRCsystemcouldbeperformed.Inordertofurtherillustratetherelationshipbetweenthestabilityrangeandbandwidths,itanalyzesquantitativelytheperformanceofESOandADRCbasedontherootlocusandthestepresponse.Finally,anexamplebasedonatypicalcontrolsystemiscarriedout,andsimulationresultsverifythetheoreticalanalysisprovedinthispaper.

简介：

简介：Wereportonaone-stageerbium-dopedfibreamplifiedspontaneousemission(ASE)sourcewith80nmbandwidthand13.5dBmoutputpower.thebroadbandwidtherbiumASEsourcewasrealizedinanerbium-dopedfibrewith37mlengthbya1480nmlaserdiodeanda980nmlaserdiodeasforwardandbackwardpumpsources,respectively.Thetotalpumppowerisonly95.7mW.