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180 个结果
  • 简介:Recently,Cristofaro-GardinerandHutchingsprovedthatthereexistatleasttwoclosedcharacteristicsoneverycompactstar-shapedhypersufaceinR~4.ThenGinzburg,Hein,Hryniewicz,andMacarinigavethisresultasecondproof.Inthispaper,wegiveitathirdproofbyusingindexiterationtheory,resonanceidentitiesofclosedcharacteristicsandaremarkabletheoremofGinzburgetal.

  • 标签: 封闭特征 星形 紧凑 封闭特性 超曲面 证明
  • 简介:在这篇论文,一个新有点轮流出现的方向含蓄(ADI)Crank-Nicolson-type直角的花键搭配(振荡)方法为二维的部分进化方程被提出,一个弱单个的核在线性粘弹性的理论产生。新奇振荡方法被用于空间discretization,和与部分照统治为时间的部件被考虑的第二份订单相结合的ADICrank-Nicolson-type方法。建议计划的稳定性rigourously被建立,并且将近最佳的顺序错误估计也被导出。数字实验被进行支持预言的集中率并且也展出期望的超级集中的现象。

  • 标签: 部分方程 直角的花键搭配计划 轮流出现的方向含蓄 稳定性 集中
  • 简介:Inthisarticle,theauthorsshowtheexistenceofglobalsolutionoftwo-dimensionalviscousCamassa-Holm(Navier-Stokes-alpha)(NS-α)equations.TheauthorsalsoprovethatthesolutionoftheNS-αequationsconvergestothesolutionofthe2DNSequationsintheinviscidlimitandgivetheconvergencerateofthedifferenceofthesolution.

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  • 简介:Thisarticleprovestheexistenceanduniquenessofsolutiontotwo-parameterstochasticVolterraequationwithnon-LipschitzcoefficientsanddrivenbyBrowniansheet,wherethemaintoolisBihari'sinequalityintheplane.Moreover,wealsodiscussthetimeregularitypropertyofthesolutionbyKolmogorov'scontinuitycriterion.

  • 标签: VOLTERRA方程 LIPSCHITZ系数 随机 双参数 正解 柯尔莫哥洛夫
  • 简介:Invariantsubspacemethodisexploitedtoobtainexactsolutionsofthetwocomponentb-familysystem.Itisshownthatthetwo-componentb-familysystemadmitsthegeneralizedfunctionalseparablesolutions.Furthermore,blowupandbehaviorofthoseexactsolutionsarealsoinvestigated.

  • 标签: 分离变量 双组分 不变子空间 系统 泛函 广义
  • 简介:Inthisarticle,weconsideratwo-componentnonlinearshallowwatersystem,whichincludesthefamous2-componentCamassa-HolmandDegasperis-Procesiequationsasspecialcases.Thelocalwell-posedessforthisequationsisestablished.Somesufficientconditionsforblow-upofthesolutionsinfinitetimearegiven.Moreover,byseparationmethod,theself-similarsolutionsforthenonlinearshallowwaterequationsareobtained,andwhichlocalorglobalbehaviorcanbedeterminedbythecorrespondingEmdenequation.

  • 标签: 自相似解 双组分 水系统 浅水方程 爆破 充分条件
  • 简介:Inthisarticle,weintroduceanewviscosityiterativemethodfortwononexpansivemappingsinHilbertspaces.Wealsoprove,withoutcommutativityassumption,thattheiteratesconvergetoacommonfixedpointofthemappingswhichsolvessomevariationalinequality.TheresultspresentedextendthecorrespondingresultsofShimizuandTakahashi[T.Shimizu,W.Takahashi,Strongconvergencetocommonfixedpointoffamiliesofnonexpansivemappings,J.Math.Anal.Appl.211(1997),71-83],andYaoandChen[Y.Yao,R.Chen,ConvergencetocommonfixedpointsofaveragemappingswithoutcommutativityassumptioninHilbertspaces,NonlinearAnalysis67(2007),1758-1763].

  • 标签: Hilbert空间 映射不动点 非扩张映象 可交换性 迭代法 粘性
  • 简介:Forapairofnodess,tinanundirectedgraphG=(V,A)andagivenlevelUofallowabledelay,wewouldliketomodifythenetworkbynode-basedoredge-basedupgradingstrategiestomakethedelaybetweensandtnotgreaterthanU.Inthispaper,wepresentsomeNP-hardresultsforthedelayimprovementproblems.

  • 标签: 有基节点 有基边集 间接图 偶加分割
  • 简介:Anon-autonomouscompetingsystemisinvestigatedinthispaper,wherethespeciesxcandiffusebetweentwopatchesofaheterogeneousenvironmentwithbarriersbetweenpatches,butforspeciesy,thediffusiondoesnotinvolveabarrierbetweenpatches,furtheritisassumedthatalltheparametersaretimedependent.Itisshownthatthesystemcanbemadepersistentundersomeappropriateconditions.Moreover,sufficientconditionsthatguaranteetheexistenceofauniquepositiveperiodicorbitwhichisgloballyasymptoticstablearederived.

  • 标签: 周期轨道 双核素 非自控散射 稳定渐近线 光栅
  • 简介:在这份报纸,我们关于詹姆士常数考虑下列问题:什么时候做平等J(X*)为Banach空间X的=J(X)抓住?一个Banach空格的詹姆士常数不一般来说与它的双空间的与一致,这被知道。事实上,我们已经有与对称或绝对的标准被装备的二维的normed空格的反例。然而,我们看那二维的空间X上的标准是否对称、绝对,然后平等J(X*)=J(X)抓住。这在二维的盒子中提供一个全球答案给这个问题。

  • 标签: 巴拿赫空间 二维 对偶空间 赋范空间 常数 对称
  • 简介:Weintroduceaone-stepimplicititerativemethodfortwofinitefamiliesofasymp-toticallynonexpansivemappingsinahyperbolicspaceanduseittoapproximatecommonfixedpointsofthesefamilies.Theresultspresentedinthispaperarenewinthesettingofhyperbolicspaces.Ontop,thesearegeneralizationsofseveralresultsinliteraturefromBanachspacestohyperbolicspaces.Attheendofthepaper,wegiveanexampletovalidateourresults.

  • 标签: UNIFORMLY convex hyperbolic space ASYMPTOTICALLY NONEXPANSIVE
  • 简介:Thispaperconsidersaschedulingproblemintwo-stagehybridflowshop,wherethefirststageconsistsoftwomachinesformedanopenshopandtheotherstagehasonlyonemachine.Theobjectiveistominimizethemakespan,i.e.,themaximumcompletiontimeofalljobs.WefirstshowtheproblemisNP-hardinthestrongsense,thenwepresenttwoheuristicstosolvetheproblem.Computationalexperimentsshowthatthecombinedalgorithmofthetwoheuristicsperformswellonrandomlygeneratedprobleminstances.

  • 标签: 最大完工时间 车间调度问题 最小化 流水 混合 NP-HARD
  • 简介:有牛顿重复的一个新decoupled二系结算法为解决描述通过多孔的媒介过滤的液体流动的联合Navier-Stokes/Darcy模型被建议。而且错误估计被给,当时,它证明精确性的一样的顺序能作为在好网孔直接解决系统被完成h=H2。理论分析和数字实验为解决联合问题说明算法的效率。

  • 标签: 牛顿迭代 模型描述 求解 加纳 格法 修改
  • 简介:Cahn-Hilliard阶段地的数字近似当模特儿因为二阶段的不可压缩的流动在这份报纸被考虑。几有效并且为联合非线性的Cahn-Hilliard阶段地的精力马厩时间discretization计划为匹配的密度盒子和变量的系统密度大小写被构造,并且被显示满足类似于连续精力法律的分离精力法律。

  • 标签: 不可压缩流 能源计划 流动模型 稳定 位场 d相
  • 简介:Epidemiologicstudiesuseoutcome-dependentsampling(ODS)schemeswhere,inadditiontoasimplerandomsample,therearealsoanumberofsupplementsamplesthatarecollectedbasedonoutcomevariable.ODSschemeisacost-effectivewaytoimprovestudyefficiency.Wedevelopamaximumsemiparametricempiricallikelihoodestimation(MSELE)fordatafromatwo-stageODSschemeundertheassumptionthatgivencovariate,theoutcomefollowsagenerallinearmodel.Theinformationofbothvalidationsamplesandnonvalidationsamplesareused.Whatismore,weprovetheasymptoticpropertiesoftheproposedMSELE.

  • 标签: 经验似然估计 广义线性模型 半参数 采样 消耗臭氧层物质 简单随机样本