学科分类
/ 8
144 个结果
  • 简介:Wepresentacomparisonofwide-areafiletransferperformanceofthenewGlobusGSIFTPandCERN'srfiotools,ThefullversionofthepaperisavailableonthewebatthefollowingURL.

  • 标签: 广域网 存储管理器 GSIFTP RFIO实验
  • 简介:Cheng类型不平等,Cheeger类型不平等和Faber-Krahn-type不平等被概括到Finslermanifolds。为一个协议,与加权的Ricci弯曲歧管的Finsler从在下面跳了由一个否定常数,第一个特征值的Li-Yaus评价也被给。

  • 标签: FINSLER流形 第一特征值 比较定理 不等式 紧致 下界
  • 简介:Withthehelpofalimitpropertyofsolutionsofbackwardstochasticdifferentialequations(BSDEs),thispaperestablishesaconversecomparisontheoremfordeterministicgeneratorsgofBSDEsundertheassumptiong(t,y,0)≡0.

  • 标签: 反向统计微分方程 期望 逆比较 生成元
  • 简介:TheauthorpresentssomestraightforwardproofsfortwocomparisontheoremsforGreenfunctionsofMarkovchains,whichslightlyimprovethepreviousresultsbyVaropoulos,DurrettandYanandChen.ArecentresultbyRogersandWilliamsaboutinstantaneousMarkovchainsisalsoimprovedbyusingthesameidea.

  • 标签: CHAINS slightly instantaneous Lyons INVAR usual
  • 简介:ThediscontinuousGalerkin(DG)orlocaldiscontinuousGalerkin(LDG)methodisaspatialdiscretizationprocedureforconvection-diffusionequations,whichemploysusefulfeaturesfromhighresolutionfinitevolumeschemes,suchastheexactorapproximateRiemannsolversservingasnumericalfluxesandlimiters.TheLax-Wendrofftimediscretizationprocedureisanalternativemethodfortimediscretizationtothepopulartotalvariationdiminishing(TVD)Runge-Kuttatimediscretizations.Inthispaper,wedevelopfluxesforthemethodofDGwithLax-Wendrofftimediscretiza-tionprocedure(LWDG)basedondifferentnumericalfluxesforfinitevolumeorfinitedifferenceschemes,includingthefirst-ordermonotonefluxessuchastheLax-Friedrichsflux,Godunovflux,theEngquist-Osherfluxetc.andthesecond-orderTVDfluxes.WesystematicallyinvestigatetheperformanceoftheLWDGmethodsbasedonthesediffer-entnumericalfluxesforconvectiontermswiththeobjectiveofobtainingbetterperfor-mancebychoosingsuitablenumericalfluxes.Thedetailednumericalstudyismainlyperformedfortheone-dimensionalsystemcase,addressingtheissuesofCPUcost,ac-curacy,non-oscillatoryproperty,andresolutionofdiscontinuities.Numericaltestsarealsoperformedfortwodimensionalsystems.

  • 标签: 不连续Galerkin法 时间离散 数字通量 高阶精确度
  • 简介:Acousticimpulsesproducedthroughthemechanismofthelaser-inducedbreakdowninwaterhavebeeninvestigatedintherangefrom0℃toroomtemperature.Differentlyfromtheacousticimpulsesproducedviathermalexpansion,thepolarityandtheamplitudeofacousticimpulseproducedvialiquidbreakdownmechanismdonotchangewithwatertemper-ature.Thisindirectlyprovesthattheproductionofacousticimpulseisduetotheexpansionofthecavityitselfwhichincludesplasma.Asemiempiricaldescriptionofthisphenomenonisgiveninthispaper.

  • 标签: BREAKDOWN TEMPER IMPULSE dielectric polarity SURROUNDING
  • 简介:ConsiderthelinearsystemAx=b,(1)whereA∈Rn×nisnonsingular.TheadditiveSchwarzmethodwasintroducedinthelastcentury.Recently,themethodhasbeenusedforsolvinggeneralalgebraicsystemoflinearequations(1)inparal-lelcomputer(see[1]).Thisiterativemethodcanbeconsideredasageneralmultisplit-ting,inwhichthecorrespondingiteratesxn,l,l=1,2,…,k,aregivenby

  • 标签: 回回
  • 简介:在一台半导体设备构造一根相连的金属线的原子被电子流动在高密度搬运。这现象被称为electromigration,它可以引起线失败。以便描绘electromigration失败,比较研究被执行,一些典型现象为薄、大的结构由破裂力学对待。薄结构的一个例子,被破裂力学对待,是硅石为通讯系统的光纤维。在由electromigration的一根金属线的损坏生长在光纤维使遭到了到静态的疲劳的硅石与裂缝生长比较被描绘。另外,简短比较在大结构在electromigration失败和一些破裂现象之间被做。

  • 标签: 断裂力学 电迁移 金属线 失效 二氧化硅光纤 大型结构
  • 简介:ThelargescalelinearsystemswithM-matricesoftenappearinawidevarietyofareasofphysical,fluiddynamicsandeconomicsciences.Itisreportedin[1]thattheconvergencerateoftheIMGSmethod,withthepreconditionerI+S_α,issuperiortothatofthebasicSORiterativemethodfortheM-matrix.ThispaperconsidersthepreconditionedJacobi(PJ)methodwiththepreconditionerP=I+S_α+S_β,andprovestheoreticallythattheconvergencerateofthePJmethodisbetterthanthatofthebasicAORmethod.Numericalexamplesareprovidedtoillustratethemainresultsobtained.

  • 标签: 雅可比行列式 迭代法 前提条件 最大矩阵
  • 简介:Inthispaperwestudyreflectedanddoublyreflectedbackwardstochasticdifferentialequations(BSDEs,forshort)drivenbyTeugelsmartingalesassociatedwithL'evyprocesssatisfyingsomemomentconditionsandbyanindependentBrownianmotion.ForBSDEswithonereflectingbarrier,weobtainacomparisontheoremusingtheTanaka-Meyerformula.ForBSDEswithtworeflectingbarriers,wefirstprovetheexistenceanduniquenessofthesolutionsundertheMokobodski'sconditionbyusingtheSnellenvelopetheoryandthenweobtainacomparisonresult.

  • 标签: 倒向随机微分方程 双反射 征税 折射 MEYER 布朗运动
  • 简介:纸基于准确公平可靠,相对错误函数作为损失功能在被拿开发最佳的Bonus-Malus系统(BMS)的一个图案。在BMS,频率和严厉部件被考虑。这个图案与从古典方形错误的损失功能导出的传统的BMS相比。

  • 标签: Bonus-Malus系统 BMS 差积可靠性 公平可靠性 误差函数
  • 简介:Theprimaryresonancesofaquadraticnonlinearsystemunderweakandstrongexternalexcitationsareinvestigatedwiththeemphasisonthecomparisonofdifferentanalyticalapproximateapproaches.Theforcedvibrationofsnap-throughmechanismistreatedasaquadraticnonlinearoscillator.TheLindstedt-Poincar′emethod,themultiple-scalemethod,theaveragingmethod,andtheharmonicbalancemethodareusedtodeterminetheamplitude-frequencyresponserelationshipsofthesteady-stateresponses.Itisdemonstratedthatthezeroth-orderharmoniccomponentsshouldbeaccountedintheapplicationoftheharmonicbalancemethod.Theanalyticalapproximationsarecomparedwiththenumericalintegrationsintermsofthefrequencyresponsecurvesandthephaseportraits.Supportedbythenumericalresults,theharmonicbalancemethodpredictsthatthequadraticnonlinearitybendsthefrequencyresponsecurvestotheleft.Iftheexcitationamplitudeisasecond-ordersmallquantityofthebookkeepingparameter,thesteady-stateresponsespredictedbythesecond-orderapproximationoftheLindstedtPoincar′emethodandthemultiple-scalemethodagreequalitativelywiththenumericalresults.Itisdemonstratedthatthequadraticnonlinearsystemimpliessofteningtypenonlinearityforanyquadraticnonlinearcoefficients.

  • 标签:
  • 简介:Anticipatedbackwardstochasticdifferentialequation(ABSDE)studiedthefirsttimein2007isanewtypeofstochasticdifferentialequations.Inthispaper,weestablishageneralcomparisontheoremforABSDEs.

  • 标签:
  • 简介:ThepreparationoftwotypesofmolecularsievesAlPO4-11andMAPO-11isreported.Theparticlesizeofthelatterishundredsofmicrons,about10timeslargerthanthatoftheformer.TheXRD,IRandDTAspectrahavedemonstratedthatmagnesiumhasbeenintroducedintotheframeworkofAlPO4-11.ThesuccessfulpreparationoflargesinglecrystalofMAPO-11willopenupanewareaforthepreparationoflargemolecularsievescrystalsinthefuture.ThelargeMAPO-11crystalcompoundisapromisinghostforthehost-guestassemblyofcompositematerials.

  • 标签: 单晶体 磷酸铝-11 MAPO-11 分子筛 晶体生长
  • 简介:Inthispaper,severalmixtruerulesofsoundvelocityandtheirusefulnessincharacterizingthecomponentsofbiomediumareanalysed.Itispointedoutthatforcharacterizingthecomponentsofbiomedium,therulesarecompatiblewitheachotherundercertainconditions,andtheerrorsbetweeneachruleandrealsoundvelocityarediffferent.Itconcludesthatthereisnogeneralrulesuitableforvariousmediaamongabovementionedrules.

  • 标签: SOUND VELOCITY MIXTURE RULES Biomedium.