简介:Wepresentaschemeforpreparingremotelyathree-particlepureentangledstateviaentanglementswapping,andthenwedirectlygeneralizeittothemultiparticlecase.ItisshownthatbyusingNpairsofbipartiteEPRstatesasthequantumchannel,remotepreparationofsomespeciallychosenN-particlepureentangledstatescanbeachievedfaithfullywithanN-particleorthonormalbasismeasurementandonlyNbitsofclassicalinformation.
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.
简介:Weinvestigatetheproblemofteleportationofunitaryoperationsbyunidirectionalcontrol-statetelepor-rationandproposeaschemecalledunidirectionalquantumremotecontrol.Theschemeisbasedontheisomorphismbetweenoperationandstate.Itallowsustostoreaunitaryoperationinacontrolstate,therebyteleportatSonoftheunitaryoperationcanbeimplementedbyunidirectionalteleportationofthecontrol-state.WefindthattheprobabilityofsuccessforimplementinganarbitraryunitaryoperationonarbitraryA~-qubitstatebyunidirectionalcontrol-stateteleportationis4^-M,and2Mebitsand4Mcbitsareconsumedineachteleportation.
简介:Weproposeaschemeformultiparty-controlledremotepreparationofthetwo-particlestatebyusingtwonon-maximallyGreenberger-Horne-Zeilingerstatesasquantumchannel.Ourschemeconsistsofonesenderandnremotereceivers.Itwillbeshownthatthesendercanhelpeitheroneofthenreceiverstoremotelypreparationtheoriginalstatewiththeappropriateprobability,andthesenderAlice'stwo-particleprojectivemeasurementandthecontrollers'single-particleproductmeasurementsareneeded.Wealsoobtainedtheprobabilityofthesuccessfulremotestatepreparation.
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.
简介:Thispaperintroducesanewenhancementmethodformulti-spectralsatelliteremotesensingimagery,basedonprincipalcomponentanalysis(PCA)andintensity-hue-saturation(IHS)transformations.ThePCAandtheIHStransformationsareusedtoseparatethespatialinformationofthemulti-spectralimageintothefirstprincipalcomponentandtheintensitycomponent,respectively.TheenhancedimageisobtainedbyreplacingtheintensitycomponentoftheIHStransformationwiththefirstprincipalcomponentofthePCAtransformation,andundertakingtheinverseIHStransformation.Theobjectiveoftheproposedmethodistomakegreateruseofthespatialandspectralinformationcontainedintheoriginalmulti-spectralimage.Onthebasisofthevisualandstatisticalanalysisresultsoftheexperimentalstudy,wecanconcludethattheproposedmethodisanidealnewwayformulti-spectralimagequalityenhancementwithlittlecolordistortion.Ithaspotentialadvantagesinimagemappingoptimization,objectrecognition,andweakinformationsharpening.
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.
简介:Wepresenttwoschemesforpreparingremotelyathree-particleentangledstatebytwodifferentquantumchannels.Inthefirstscheme,twopartialthree-particleentangledstatesareusedasthequantumchannels,whileinthesecondscheme,threetwo-particlenon-maximallyentangledstatesareemployedasthequantumchannels.Itisshownthattheremotestatepreparationcanbesuccessfullyreal/zealwithcertainprobability,forbothtwoschemes,ifasenderperformssomeprojectivemeasurementsandareceiveradoptssomeappropriateunitarytransformations.Itisshownalsothatthesuccessfulprobabilitiesofthesetwoschemesaredifferent.