学科分类
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500 个结果
  • 简介:首先将[3]的双Possion风险模型推广到带干扰的一种新模型。然后运用鞅论的方法得出破产概率满足Lundberg不等式和一般公式。以及当个体所赔服从指数分布时的破产概率的具体表达式。

  • 标签: 干扰 风险模型 停时 破产概率 保险公司
  • 简介:WhenthePoissonmatrixofPoissonsystemisnon-constant,classicalsymplecticmethods,suchassymplecticRunge-Kuttamethod,generatingfunctionmethod,cannotpreservethePoissonstructure.Thenon-constantPoissonstructurewastransformedintothesymplecticstructurebythenonlineartransform.ArbitraryordersymplecticmethodwasappliedtothetransformedPoissonsystem.TheEulerequationofthefreerigidbodyproblemwastransformedintothesymplecticstructureandcomputedbythemid-pointscheme.Numericalresultsshowtheeffectivenessofthenonlineartransform.

  • 标签: Poisson系统 对称结构 非线性传播 刚性体 POISSON结构
  • 简介:Wecompare13differentaposteriorierrorestimatorsforthePoissonproblemwithlowest-orderfiniteelementdiscretization.Residual-basederrorestimatorscompetewithawiderangeofaveragingestimatorsandestimatorsbasedonlocalproblems.Amongourfivebenchmarkproblemswealsolookontwoexampleswithdiscontinuousisotropicdiffusionandtheirimpactontheperformanceoftheestimators.(SupportedbyDFGResearchCenterMATHEON.)

  • 标签: 后验误差估计 竞争 有限元离散 性能影响 各向同性 不连续
  • 简介:我们withasymptotically在某完全的军士合同manifolds上学习泊松方程非否定的弯曲。我们将也与非否定的弯曲在某完全的军士合同manifolds上学习nonhomogeneousheat方程的限制行为。

  • 标签: 完全非紧流形 泊松方程 热力方程 GREEN函数
  • 简介:VariationalmethodsareusedtostudythenonlinearSchrdinger-Poissontypeequationswhichmodeltheelectromagneticwavepropagatingintheplasmainphysics.ByanalyzingtheHamiltonianpropertytoconstructaconstrainedvariationalproblem,theexistenceofthegroundstateofthesystemisobtained.Furthermore,itisshownthatthegroundstateisorbitallystable.

  • 标签: Schrdinger-Poisson TYPE EQUATIONS ground state EXISTENCE
  • 简介:ThispaperstudiestheoperatingcharacteristicsofanM/G/1queuingsystemwitharandomizedcontrolpolicyandatmostJvacations.Afterallthecustomersareservedinthequeueexhaustively,theserverimmediatelytakesatmostJvacationsrepeatedlyuntilatleastNcustomersarewaitingforserviceinthequeueuponreturningfromavacation.IfthenumberofarrivalsdoesnotreachNbytheendoftheJ~(th)vacation,theserverremainsidleinthesystemuntilthenumberofarrivalsinthequeuereachesN.IfthenumberofcustomersinthequeueisexactlyaccumulatedNsincetheserverremainsidleorreturnsfromvacation,theserverisactivatedforserviceswithprobabilitypanddeactivatedwithprobability(1-p).Forsuchvariantvacationmodel,otherimportantsystemcharacteristicsarederived,suchastheexpectednumberofcustomers,theexpectedlengthofthebusyandidleperiod,andetc.Followingtheconstructionoftheexpectedcostfunctionperunittime,anefficientandfastprocedureisdevelopedforsearchingthejointoptimumthresholds(N~*,J~*)thatminimizethecostfunction.Somenumericalexamplesarealsopresented.

  • 标签: 输入排队 随机化 休假 M/G/1排队系统 施工时间 成本函数
  • 简介:Theprobabilityofearthquakeoccurrenceintheforthcoming50yearsintheareaconfinedbyLinfen,Taiyuan,andDaixianbasins,ShanxiProvinceiscomputedbyusingadualPoissonmodelandthefutureseismicriskisalsocomputedbyusingaprobabilitydistributionintegratedwiththeattenuationlaw.

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  • 简介:ThispaperfocusesonstudyingthePoissontheoryandtheintegrationmethodofdynamicsofrelativemotion.Equationsofadynamicalsystemofrelativemotioninphasespacearegiven.Poissontheoryofthesystemisestablished.TheJacobilastmultiplierofthesystemisdefined,andtherelationbetweentheJacobilastmultiplierandthefirstintegralsofthesystemisstudied.Ourresearchshowsthatforadynamicalsystemofrelativemotion,whoseconfigurationisdeterminedbyngeneralizedcoordinates,thesolutionofthesystemcanbefoundbyusingtheJacobilastmultiplierif(2n1)firstintegralsofthesystemareknown.Attheendofthepaper,anexampleisgiventoillustratetheapplicationoftheresults.

  • 标签: 系统集成方法 相对运动方程 动力系统 雅可比 积分方法
  • 简介:Inthispaper,theuniquenessofstationarysolutionswithvacuumofEulerPoissonequationsisconsidered.Throughanonlineartransformationwhichisafunctionofdensityandentropy,thecorrespondingproblemcanbereducedtoasemilinearellipticequationwithanonlinearsourcetermconsistingofapowerfunction,forwhichtheclassicaltheory[4]'[9]oftheellipticequationsleadstheauthorstotheuniquenessresultundersomeassumptionsontheentropyfunctionS(x).Asanexample,theauthorsgettheuniquenessofstationarysolutionswithvacuumofEuler-PoissonequationsforS(x)=|x|θandθ∈{0}∪[2(N-2),+∞).

  • 标签: 唯一性 稳定解
  • 简介:这份报纸基于方向性的差别为有限的点方法使一些成为数学分析。由用仅仅为一阶的计算和秒顺序的五个附近的点的数字公式的明确的表达式的优点方向性的differentials,新方法论被介绍给拉普拉斯算符操作符在2D上定义的discretize散布的点分布。有很弱的限制的一些足够的条件被获得,在哪个下面结果的计划是积极计划。作为后果,分离最大的原则被证明,并且第一命令O(h)的会聚的结果为在散布的点分布上定义的节的答案被完成,它能在一致的点分布上被提起直到O(h2)。

  • 标签: 计算机数学 有限元素方法 随机的集中 DISCRETIZATION 方法 分发(概率理论)