简介:TheCMSgroupsintheUSAareactivelyinvolvedinseveralgrid-elatedprojects,includingtheDoE-fundedParticlePhysicsDataGrid(PPDG)andtheNSFfundedGridPhysicsNetwork(GriPhyN).Wepresentdevelopmentsof:theGriddataManagementPilot(GDMP)software;aJavaAnalysisStudio-basedprototyperemoteanalysisserviceforCMSdata;toolsforautomatingjobsubmissionschemesforlargescaledistributedsimulationandreconstructionrunsforCMS;modelinganddevelopmentofjobschedulingschemesusingtheMONARCtoolkit;arobustexecutionservicefordistributedprocessors.ThedeploymentanduseofthesetoolsatprototypeTier1andTier2computingcentersintheUSAisdescribed.
简介:<正>SupposeXisasuperdiffusioninRdwithgeneralbranchingmechanism¢.andYDdenotesthetotalweightedoccupationtimeofXinaboundedsmoothdomainD.WediscusstheconditionsonψtoguaranteethatYDhasabsoluteycontinuousstates.Andforparticularψ(z)=z(l+,0DisabsolutelycontinuouswithrespecttotheLebesguemeasureinD.whereasinthecased>2+2/B.itissingular.AsweknowtheabsolutecontinuityandsingularityofY(Dhavenotbeendiscussedbefore.
简介:Westudyfew-electronsemiconductorquantumdotsusingtheunrestrictedHartree-Fock-RoothaanmethodhasedontheGaussianbasis.Ouremphasisisontheenergylevelcalculationforquantumdots.Theconfinementpotentialinaquantumdotisassumedtobeinaformofthree-dimensionalsphericalfinitepotentialwell.Somevaluableresults,suchastherearrangementoftheenergylevel,havebeenobtained.
简介:<正>ThispaperdevelopsasymptoticpropertiesofsingularlyperturbedMarkovchainswithinclusionofabsorbingstates.Itfocusesonbothunscaledandscaledoccupationmeasures.Undermildconditions,amean-squareestimateisobtained.Byaveragingthefastcomponents,weobtainanaggregatedprocess.Althoughtheaggregatedprocessitselfmaybenon-Markovian,itsweaklimitisaMarkovchainwithmuchsmallerstatespace.Moreover,asuitablyscaledsequenceconsistingofacomponentofscaledoccupationmeasuresandacomponentoftheaggregatedprocessisshowntoconvergetoapairofprocesseswithaswitchingdiffusioncomponent.
简介:<正>LetXbeaconnectedfiniteCWcomplexanddx:KO(C(X))→Zbethedimensionfunction.Weshowthat,ifAisaunitalseparablesimplenuclearC*-algebraofTR(A)=0withtheuniquetracialstateandsatisfyingtheUCTsuchthatKO(A)=QkerdxandK1(A)=K1(C(X)).thenAisisomorphictoaninductivelimitofMn!(C(X)).
简介:Undertheconditionofhigh-powerdrive,theexperimentalphenomenaoffreestatoroftravelingwaveultrasonicmotortakesonstrongnonlineareffects.Firstly,itscorrespondingtheoriesareestablishedtoanalyzeandcomparethestator'sperformancesattheresonanceandantiresonancestates.Atthesametime,someimportantparameters,suchasresonance/antiresonancefrequency,mechanicalquality,electro-mechaniccoupling,andtherelativevibrationeffect,areselectedelaboratelytoevaluatethevibrationalperformancesoffreestator.Then,someexperimentalschemesbasedonthelaservibrationmeasurementaredesignedrespectively.Underthedifferentdrivesconditions,theexperimentalcharacterizationsoffreestatorattheresonanceandantiresonancestatesareanalyzedsystematically.Finally,Theinvestigativeresultsshowthattheperformanceattheantiresonancestateismuchbetterthanthatattheresonancestate.Someconclusionsofthispapercanprovidenovelideaandguidanceforthechoosingoftheoperatingstatesanddrivingmodesoftravelingwaveultrasonicmotor.
简介:ThemagneticpropertiesofCeRhln5arestudiedbyfirst-principlescalculation.Spin-orbitcouplingisconsideredaswellasdifferentcorrectionsincludinglocaldensityapproximationpluson-siteCoulombinteractionU(U=1,1.5,3eV)andorbitalpolarization.TheresultsshowtheexistenceofonlymoderatecorrelationinCeRhln5andCe-4felectronsareontheborderoflocalizationanditinerancy.Theeffectofpressurebychangingthevolumeoftheunitcellisalsostudied.
简介:Theexistenceanduniquenessofpositivesteadystatesfortheage-structuredMSEIRepidemicmodelwithage-dependenttransmissioncoefficientisconsidered.Thresholdresultsfortheexistenceofendemicstatesareestablished;undercertainconditions,uniquenessisalsoshown.
简介:Emission Temperatures from Populations of Particle Unstable States as a Function of Impact ParameterEmissionTemperaturesfromP...
简介:AsimplemethodispresentedforgeneratingmulticomponentSchroedingercatstatesthroughresonantatomfieldinteractions.Intheschementwo-levelatoms,initiallyingroundstates,aresentthrougharesonantcavityfilledwithastrongcoherentfieldsequentially.Thenstate-selectivemeasurementsareperformedontheatoms.Thedetectionsoftheatomsingroundstatescollapsethecavityfieldontoasuperpositionof2^ncoherentstates.Thisisthefirstwayforproducingsuperpositionsofmanycoherentstatesthroughresonantatom-fieldinteraction.
简介:当界限状态由instantaneousBethe-Salpeter(BS)是描述得好的时,我们精确为在二个界限状态之间的转变导出“严密即时明确的表达”方程(即方程的核“偶尔”是即时的)。事实上,Theobtained严密即时明确的表达被表示为当减少的BS波浪工作出现在明确的表达时,“二个减少的BS波浪函数”适当地夹的一个操作符是即时BS方程的严密解决方案,并且他们可以正直地联系toSchroedinger波浪函数。我们也证明严密即时明确的表达关于U_(他们)(1)是计量器不变的转变精确,如果担心的转变是放射的。明确的表达的一些应用被构画出。
简介:Thefeaturesofthelow-lyingspectraoffour-bodyA+B-A+B-systemshavebeendeducedbasedonsymmetry.Usingthemethodoffew-bodyphysics,wecalculatetheenergyspectraofA+B-A+B-systemsinaharmonicquantumdot.Wefindthatthebiexcitoninatwo-dimensionalquantumdotmayhaveotherboundexcitedstatesandthequantummechanicalsymmetryplaysacrucialroleindeterminingtheenergylevelsandstructuresofthelow-lyingstates.
简介:ByapplyinghigherpowersoftheBogoliubovtransformationoperatorb^t=u^*a+μ^*a^ttothetwo-photoncoherentstates(orminimumuncertaintysqueezedstates)weconstructanewtypeofquantumstatewhichwecallthegeneralizedexcitedtwo-photoncoherentstates.Analyticexpressionsforthequantumstatisticalpropertiesarederived,andthroughnumericalcomputationthephasespacequasi-probabilitydistributionsarefound.Thesestatescanexhibithighlynonclassicalbehaviourdependingonthedegreeofexcitationmandotherparameters.ForparticularvaluesoftwoparametersAandp,thesegeneralizedstatesreducetootherclassesofcoherentstatesformerlyreported.Ourtheorythuspresentsamuchbroaderapproachtothesetypesofquantumstates.