学科分类
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15 个结果
  • 简介:由于到在二种尺寸的一极化的马方程的声学的方程的通讯,我们理论上利用最近建议的遥远的看不见外套的声学的对应物。外套与与各向异性的集体密度在壳内嵌入的设计体积moduli,和一个反目标由一个圆形的圆柱的核心组成。cloaking壳的材料参数被使用并列转变方法获得。外套的新设计的本质依靠cloaked目标被cloaking壳不再震聋的能力,它被两个验证在二种尺寸的远地、近地的完整波浪的有限元素的模拟。

  • 标签: 物理学 理论 现状 发展
  • 简介:Wepresentaschemeforpreparingremotelyathree-particlepureentangledstateviaentanglementswapping,andthenwedirectlygeneralizeittothemultiparticlecase.ItisshownthatbyusingNpairsofbipartiteEPRstatesasthequantumchannel,remotepreparationofsomespeciallychosenN-particlepureentangledstatescanbeachievedfaithfullywithanN-particleorthonormalbasismeasurementandonlyNbitsofclassicalinformation.

  • 标签: 投影测量 纠缠 量子通信 量子信息 核磁共振测量 量子管
  • 简介:Themulti-tieredarchitectureofthehighly-distributedCMScomputingsystemsnecessitatesaflexibledatadistributionandanalysisenvironment.WedescribeaprototypeanalysisenvironmentwhichfunctionsefficientlyoverwideareanetworksusingaserverinstalledattheCaltech/UCSDTier2prototypetoanalyzeCMSdatastoredatvariouslocationsusingathinclient.TheanalysisenvironnmentisbasedonexistingHEP(Anaphe)andCMOS(CARF,ORCA,IGUANA)softwarethchnologyontheserveracessedfromavarietyofclients.AJavaAnalysisStudio(JAS,fromSLAC)plug-inisbeingdevelopedasareferenceclient.Theserverisoperatedas"Blackbox"ontheproto-Tier2system.ORCAObjectivitydatabases(e.g.anexistinglargeCMSMuonsample)arehostedonthemasterandslavenodes,andremoteclientscanrequestprocessingofqueriesacrosstheservernodes,andgetthehistogramresultsreturnedandrenderedintheclient.TheserverisimplementedusingpureC++,anduseXML-RPCasalanguage-neutraltransport.Thishasseveralbenefits,includingmuchbetterscalability,betterintegrationwithCARF/ORCA,andimportanly,Makestheworkdirectlyusefultoothernon-javageneral-purposeanalysisandpresentationtoolssuchasHippodraw,Lizard.orROOT.

  • 标签: 目标取向数据库 CMS实验 远距离分析
  • 简介:Weinvestigatetheproblemofteleportationofunitaryoperationsbyunidirectionalcontrol-statetelepor-rationandproposeaschemecalledunidirectionalquantumremotecontrol.Theschemeisbasedontheisomorphismbetweenoperationandstate.Itallowsustostoreaunitaryoperationinacontrolstate,therebyteleportatSonoftheunitaryoperationcanbeimplementedbyunidirectionalteleportationofthecontrol-state.WefindthattheprobabilityofsuccessforimplementinganarbitraryunitaryoperationonarbitraryA~-qubitstatebyunidirectionalcontrol-stateteleportationis4^-M,and2Mebitsand4Mcbitsareconsumedineachteleportation.

  • 标签: 量子信息 单向性 量子遥控 量子输运 控制状态 远距离传输
  • 简介:Weproposeaschemeformultiparty-controlledremotepreparationofthetwo-particlestatebyusingtwonon-maximallyGreenberger-Horne-Zeilingerstatesasquantumchannel.Ourschemeconsistsofonesenderandnremotereceivers.Itwillbeshownthatthesendercanhelpeitheroneofthenreceiverstoremotelypreparationtheoriginalstatewiththeappropriateprobability,andthesenderAlice'stwo-particleprojectivemeasurementandthecontrollers'single-particleproductmeasurementsareneeded.Wealsoobtainedtheprobabilityofthesuccessfulremotestatepreparation.

  • 标签: 粒子态 控制器 远程 制备 量子通道 投影测量
  • 简介:BABAR[1]usestwoformatsforitsdata:ObjectivitydatabaseandROOT[1]files.Thisposterconcernsthedistributionofthelatter-forObjectivitydatasee[3].TheBABARanalysisdataisstoredinROOTfiles-oneperphysicsrunandanalysisselectionchannel-maintainedinalargedirectorytree,CurrentlyBABARhasmorethan4.5TBytesin200,000ROOTfiles.Thisdatais(mostly)producedatSLAC,butisrequiredforanalysisatuniversitiesandresearchcentresthroughouttheUSandEurope.TwobasicproblemsconfrontuswhenweseektoimportbulkdatafromSLACtoaninstitute'slocalstorageviathenetwork.Wemustdeterminewhichfilesmustbeimported(dependingonthelocalsiterequirementsandwhichfileshavealreadybeenimported),andwemustmaketheoptimumuseofthenetworkwhentransferringthedata,Basicftp-liketools(ftp,scp,etc)donotattempttosolvethefirstproblem.Moresophisticatedtoolslikersync[4],thewidely-usedmirror/synchronisationprogram,comparelocalandremotefilesystems,checkingforchanges(basedonfiledate,sizeand,ifdesired,anelaboratechecksum)inordertoonlycopynewormodifiedfiles,Howeverrsyncallowsforonlylimitedfileselection.Alsowhen,asinBABAR,anextremelylargedirectorystructuremustbescanned,rsynccantakeseveralhoursjusttodeterminewhichfilesneedtobecopied.Althoughrsync(andscp)provideson-the=flycompression,itdoesnotallowustooptimisethenetworktransferbyusingmultiplestreams,abjustingtheTCPwindowsizeorseparatingencryptedauthenticationfromunencrypteddatachannels.

  • 标签: 分布式数据库 BABAR实验合作 文件管理工具
  • 简介:我在场为二接收装置的到也的从一个发送者的一个一般two-qubit状态的概率的遥远的准备的一个新计划。量隧道由一个部分纠缠的分成三部分的GreenbergerHorneZeilinger(GHZ)状态和一个W类型状态组成。我试着由分别地使用平常的射影的测量和积极珍视操作员的措施的方法认识到遥远的two-qubit准备。有不同方法以及全部的古典通讯费用的计划的相应成功可能性在这要求计划也被计算。

  • 标签: 非对称信道 比特 远程 制备 量子态 控制
  • 简介:Thispaperintroducesanewenhancementmethodformulti-spectralsatelliteremotesensingimagery,basedonprincipalcomponentanalysis(PCA)andintensity-hue-saturation(IHS)transformations.ThePCAandtheIHStransformationsareusedtoseparatethespatialinformationofthemulti-spectralimageintothefirstprincipalcomponentandtheintensitycomponent,respectively.TheenhancedimageisobtainedbyreplacingtheintensitycomponentoftheIHStransformationwiththefirstprincipalcomponentofthePCAtransformation,andundertakingtheinverseIHStransformation.Theobjectiveoftheproposedmethodistomakegreateruseofthespatialandspectralinformationcontainedintheoriginalmulti-spectralimage.Onthebasisofthevisualandstatisticalanalysisresultsoftheexperimentalstudy,wecanconcludethattheproposedmethodisanidealnewwayformulti-spectralimagequalityenhancementwithlittlecolordistortion.Ithaspotentialadvantagesinimagemappingoptimization,objectrecognition,andweakinformationsharpening.

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  • 简介:Angularcoloruniformity(ACU)isakeyfactorusedtoevaluatethelightqualityofwhite-lightemittingdiodes(LEDs).Inthisstudy,anoveldoubleremotemicro-patternedphosphorfilm(doubleRMPPfilm)wasusedtoenhancetheACUofaremotephosphor(RP)down-lightlamp.AconventionalRPfilmandremotephosphorfilmwithsinglemicro-patternedfilm(singleRMPPfilm)alsowereexaminedforcomparison.Theangularcorrelatedcolortemperature(CCT)distributionsandtheopticalperformanceofthefilmswereexperimentallymeasured.ThemeasurementresultsshowedthatdoubleRMPPfilmconfigurationexhibitedbettercoloruniformitywithaCCTdeviationofonly441K,comparedwith556KforthesingleRMPPfilmconfigurationand1390KfortheRPfilmconfiguration.AsimulationbasedonFDTDandraytracingcombinedmethodalsoconfirmedtheACUimprovement.Inaddition,comparedwiththeconventionalRPfilm,theluminousefficiencyofsingleanddoubleRMPPfilmconfigurationswasincreasedby6.68%and4.69%,respectively,atadrivingcurrentof350mA.TheenhancementoftheACUandluminousefficiencyareduetothescatteringandmixingeffectofthemicropatternedfilm.Moreover,thedoubleRMPPfilmconfigurationhadbetterCCTstabilityatdifferentcurrentsthantheothertwoconfigurations.TheresultsdemonstratedtheeffectivenessandsuperiorityofdoubleRMPPfilminwhiteLEDapplications.

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  • 简介:Wepresenttwoschemesforpreparingremotelyathree-particleentangledstatebytwodifferentquantumchannels.Inthefirstscheme,twopartialthree-particleentangledstatesareusedasthequantumchannels,whileinthesecondscheme,threetwo-particlenon-maximallyentangledstatesareemployedasthequantumchannels.Itisshownthattheremotestatepreparationcanbesuccessfullyreal/zealwithcertainprobability,forbothtwoschemes,ifasenderperformssomeprojectivemeasurementsandareceiveradoptssomeappropriateunitarytransformations.Itisshownalsothatthesuccessfulprobabilitiesofthesetwoschemesaredifferent.

  • 标签: 量子论 纠缠 盖然论 投射测量