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115 个结果
  • 简介:<正>Inthispaperweconsiderasemi-dicretizednonlinearSchrdinger(NLS)equationwithlocalintegralnonlinearity.Itisprovedthatforeachmeshsize,thereexistattractorsforthediscretizedsystem.TheboundstortheHausdorffandfractaldimensionsofthediscreteattractorsareobtained,andthevariousboundsareindependentofthemeshsizes.Furthermore.numericalexperimentsaregivenandmanyinterestingphenomenaareobservedsuchaslimitcycles,chaoticattractorsandaso-calledcrisisofthechaoticattractors.

  • 标签: ATTRACTOR NLS EQUATION
  • 简介:<正>Inthispaper,wediscussthevariationalproblemsofstronglyquasiconvexfunctionalswithboundaryintegralsandthenon-Dirichletproblemsofquasilineardegenemteellipticequations.Wehaveestablishedthesolvabilitytheoremsofthevariationalproblemsandthenon-Dirichletproblems.

  • 标签: 数学年 湖南 年刊 卷数 全口 劣势
  • 简介:Afewweakandstrongconvergencetheoremsofthemodifiedthree-stepiterativesequencewitherrorsandthemodifiedIshikawaiterativesequencewitherrorsforasymptoticallynon-expansivemappingsinanynon-emptyclosedconvexsubsetsofuniformlyconvexBanachspacesareestablished.TheresultspresentedinthispapersubstantiallyextendtheresultsduetoChang(2001),Osilikeandhniagbosor(2000),Rhoades(1994)andSchu(1991).

  • 标签: 不动点 三步迭代序列误差修正 近似映射 一致凸巴拿赫空间 弱收敛
  • 简介:Inthispaper,thebehaviorforcommutatorsofaclassofbilinearsingularintegraloperatorsassociatedwithnon-smoothkernelsontheproductofweightedLebesguespacesisconsidered.BysomenewmaximalfunctionstocontrolthecommutatorsofbilinearsingularintegraloperatorsandCMO(Rn)functions,compactnessforthecommutatorsisproved.

  • 标签: singular integral OPERATOR maximal function weighted
  • 简介:Inthisarticle,wewillinvestigatethepropertiesofiterativesequencefornon-expansivemappingsandpresentseveralstrongandweakconvergenceresultsofsuccessiveapproximationstofixedpointsofnon-expansivemappingsinuniformlyconvexBanachspaces.Theresultspresentedinthisarticlegeneralizeandimprovevariousonesconcernedwithconstructivetechniquesforthefixedpointsofnon-expansivemappings.

  • 标签: 不可扩映射 收敛定理 标准凸巴拿赫空间 不动点
  • 简介:Inthisarticle,byusingtheoryoflinearevolutionsystemandSchauderfixedpointtheorem,weestablishasufficientresultofexactnullcontrollabilityforanonautonomousfunctionalevolutionsystemwithnonlocalconditions.Inparticular,thecompactnesscondi-tionorLipschitzconditionforthefunctionginthenonlocalconditionsappearinginvariousliteraturesisnotrequiredhere.Anexampleisalsoprovidedtoshowanapplicationoftheobtainedresult.

  • 标签: 非局部条件 精确可控性 进化系统 非自治 SCHAUDER不动点定理 LIPSCHITZ条件
  • 简介:Westudytheexistenceoftravelingwavesolutionsforanonlocalandnon-monotonedelayedreaction-difusionequation.Basedontheconstructionoftwoassociatedauxiliaryreactiondifusionequationswithmonotonicityandbyusingthetravelingwavefrontsoftheauxiliaryequations,theexistenceofthepositivetravelingwavesolutionsforc≥cisobtained.Also,theexponentialasymptoticbehaviorinthenegativeinfnitywasestablished.Moreover,weapplyourresultstosomereactiondifusionequationswithspatio-temporaldelaytoobtaintheexistenceoftravelingwaves.Theseresultscover,complementand/orimprovesomeexistingonesintheliterature.

  • 标签: 反应扩散方程 非单调 行波 非局部 解的存在性 时滞
  • 简介:Inthispaper,weareconcernedwiththeexistenceofperiodicsolutionsofsecond-ordernon-autonomoussystems.ByapplyingtheSchauder'sfixedpointtheoremandMiranda'stheorem,anewexistenceresultofperiodicsolutionsisestablished.

  • 标签:
  • 简介:AclassofnonlinearparabolicequationonapolygonaldomainΩR2isinves-tigatedinthispaper.Weintroduceafiniteelementmethodonoverlappingnon-matchinggridsforthenonlinearparabolicequationbasedonthepartitionofunitymethod.Wegivetheconstructionandconvergenceanalysisforthesemi-discreteandthefullydiscretefiniteelementmethods.Moreover,weprovethattheerrorofthediscretevariationalproblemhasgoodapproximationproperties.Ourresultsarevalidforanyspatialdimensions.Anumericalexampletoillustratethetheoreticalresultsisalsogiven.

  • 标签: 抛物线方程 有限元分析 多角形域 匹配 偏微分方程
  • 简介:在这篇文章,我们得到non-selfsimilar基本在另一种看法能量守恒定律飘动,它与平常的自我类似的转变不同。答案有不同全球结构。这篇文章被划分成三部分。第一部分是介绍。在第二部分,我们讨论non-selfsimilar基本波浪和他们二维的能量守恒定律的一个班的相互作用。在这种情况中,我们考虑起始的断绝是有u+的抛物线的盒子>0,当明确的non-selfsimilar变成稀薄波浪能被获得时。在第二部分,我们考虑盒子u+的答案结构<0。新答案结构被在不同基本波浪之间的相互作用获得,并且将继续与另外的状态交往。全球答案将与一种尺寸的状况很不同。

  • 标签: 溶液结构 守恒律 多解 相互作用 相似变换 守恒定律
  • 简介:AccordingtotheanalyticalcharacteristicsofcubicBsplinefunction,suchascompactnessanddiscontinuoussmoothness,twomethods,GlobalintegralmethodandAssemblingmethodareproposedtocalculatethenon-linearstiffnessmatrixinthesplinefiniteelementmethod.TheGlobalintegralmethodtransformstheintegraloftheproductofsplinefunctionsintothesumofboundarydataoftheproductbyintegralbyparts.TheAssemblingmethodusesthecompactnesscharacteristicsofthesplinefunction,reducesthen+3orderstiffnessmatrixinunitintervaltothe4ordermatrix,andthenobtainstheglobalmatrixbyassemblingthesmallones.Thetwoproposedmethodsareclearintheoryandeasytoberealizedbycomputerprogram,whichcaneffectivelyimprovetheefficiencyofthealgorithmfornonlinearsplineelementmethod.

  • 标签: NON-LINEAR STIFFNESS MATRIX SPLINE function INTEGRAL
  • 简介:WeprovethatforeveryLipschitzisomorphismffromaseparableHilbertspaceHtoaBanachspaceYwithRadon-Nikodymproperty,thereisaboundedsurjectivelinearoperatorT:H→Ysothat(f+T)-1(NG(f-1))isaΓ-nullsetofH,whereNG(f-1)isthesetofallthepointsofGteauxnon-differentiabilityoff-1.

  • 标签: 数学分析 数学理论 应用数学 函数
  • 简介:1.IntroductionTherearealotofresultsaboutHammersteinintegralequations(see[1]),butsupen-linearproblemsaredifficult;thereareonlyafewresultsaboutit.In[2,3]theauthorsstudysuperliniearintegralequations;in[4]theauthorsstudysystemofsuperlinearintegralequatio...

  • 标签: Cone TOPOLOGICAL degree theory COMPLETELY continuous
  • 简介:Nonlineardynamicalsystemsaresometimesundertheinfluenceofrandomfluctuations.Itisdesirabletoexaminepossiblebifurcationsforstochasticdynamicalsystemswhenaparametervaries.Acomputationalanalysisisconductedtoinvestigatebifurcationsofasimpledynamicalsystemundernon-Gaussianα-stableLévymotions,byexaminingthechangesinstationaryprobabilitydensityfunctionsforthesolutionorbitsofthisstochasticsystem.ThestationaryprobabilitydensityfunctionsareobtainedbysolvinganonlocalFokker-Planckequationnumerically.Thisallowsnumericallyinvestigatingphenomenologicalbifurcation,orP-bifurcation,forstochasticdifferentialequationswithnon-GaussianLévynoises.

  • 标签: 非线性动力系统 非高斯 FOKKER-PLANCK方程 分岔 征费 概率密度函数
  • 简介:Non-commutativePoissonalgebrasarethealgebrashavingbothanassociativealgebrastructureandaLiealgebrastructuretogetherwiththeLeibnizlaw.Inthispaper,thenon-commutativepoissonalgebrastructuresontheLiealgebrassln(Cq)aredetermined.

  • 标签: 非交换代数 代数结构 李代数 莱布尼茨