简介：这份报纸为改变系统由延期建模的延期的交换非线性的时间的一个班处理稳定性问题微分方程。旁边在箭头形式下面并且用新构造Lyapunov功能转变系统表示，聚集技术，Borne-Gentina实际稳定性标准与性质联系了，考虑系统的新延期无关的稳定性条件被建立。与在这的存在结果相比区域，获得的结果是明确的，对使用简单并且允许我们避免寻找普通Lyapunov的问题功能。最后，一个例子被提供，与数字模拟，到表明建议方法的有效性。

简介：Inthispaper,westudythecontrollabilityresultsforthenonlinearimpulsiveintegrodifferentialevolutionsystemswithtime-varyingdelaysinBanachspaces.Thesufficientconditionsofexactcontrollabilityisprovedunderwithoutassumingthecompactnessoftheevolutionoperator.TheresultsareobtainedbyusingthesemigrouptheoryandtheSchaferfixedpointtheorem.

简介：光谱表示方法(SRM)广泛地被用来模仿空间地变化的地面运动。这研究基于根分解集中于SRM的近似途径，它能改进模拟的效率。近似途径的精确性可以被三个因素影响：为分解的矩阵，为插值的频率插值节点和元素的分发。这条途径的精确性上的这些因素的影响被检验，下列结论被得出。SRM基于十字的根分解比SRM基于落后连贯矩阵的根分解展出更大的精确性光谱矩阵。节点在这研究建议了的频率插值的相等的精力分发是比有相等的间距的相反的木髓更有效的。为插值的元素没在精确性上有许多效果，因此因为它从一个计算效率观点是不太复杂的，分解矩阵的元素的插值被推荐。

简介：

简介：Spatialcoherenceresonanceinatwo-dimensionalneuronalnetworkinducedbyadditiveGaussiancolourednoiseandparameterdiversityisstudied.WefocusontheabilityofadditiveGaussiancolourednoiseandparameterdiversitytoextractaparticularspatialfrequency(wavenumber)ofexcitatorywavesintheexcitablemediumofthisnetwork.Weshowthatthereexistsanintermediatenoiselevelofthecolourednoiseandaparticularvalueofdiversity,whereacharacteristicspatialfrequencyofthesystemcomesforth.Hereby,itisverifiedthatspatialcoherenceresonanceoccursinthestudiedmodel.Furthermore,weshowthattheoptimalnoiseintensityforspatialcoherenceresonancedecaysexponentiallywithrespecttothenoisecorrelationtime.Someexplanationsoftheobservednonlinearphenomenaarealsopresented.

简介：Thispaperdealswiththeproblemofdeterminingtwounknownparametersofsomenonlinearreaction-diffusionmodels.Thesereaction-diffusionmodelsarederivedfromapplicationsinthegroundwaterflowtransport,environmentalsciences,gasdynamics,heatandmasstransfer,industrialautomatizationandsomeotherengineeringtechnologicalfields.Theadjointmethodbasedonthevariationalprincipleisarelativelynewoptimalcontrolmethod.Itisusedintheidentificationoftheunknowndiffusioncoefficient,andsomecoefficientsofthenonlinearsinkorsourcetermsinthesesystems.Atfirst,theproblemistransferredintoanoptimizationproblemofminimizingafunctional,andtheadjointequationsofthegoverningequationsarederivedfromtheadjointmethod.Then,theformulasaregiventocalculatethegradientoftheobjectivefunctionwithrespecttothecoupleofunknownparameters.Atlast,aniterativegradient-basedoptimizationalgorithmispresentedforsolvingtheoptimizationproblem.Anumericalexampleisofferedintheend.Itshowstheeffectivenessoftheproposedapproach.

简介：

简介：Thepaperisconcernedwithsolvingperiodicboundaryproblemofsemilinearsystems,whichwillbedifferentiablyembeddedintoanone-parameterfamilyofoperators.Thesolutionofthesystemsisthenfoundbycontinuingthesolutioncurveofoperatorhomotopy.WhentheNewton-Kantorovich'sprocedureisappliedtothecorrespondingoperatorequations,anefficientalgorithmisderived.Finally,thetheoreticalresultsareinexcellentagreementwiththenumericalexamples.

简介：由使用矩阵的向量方法，我们关于线性限制学习生长曲线模型。在矩阵损失功能和向量损失功能下面，我们在不同类的线性类上为参数的线性评估者的考虑获得必要、足够的条件。

简介：在黑色基于Blandford-Znajek和磁性的联合进程的共存洞(BH)生长圆盘，为喷气力量的一个多参数模型和活跃星群的原子核(AGN)的收音机大声被学习。结果，AGN的收音机大声能被五个参数管理：(ⅰ)BH旋转，(ⅱ)变化的一个幂定律索引磁性在圆盘上删除；(ⅲ)决定圆盘的内部边的位置的一个参数，(ⅳ)到生长流动的最深处的部分的公羊压力的领带地平线上的磁场的压力的比率，并且(ⅴ)到地平线的户外Reldlines的尖速度的比率。观察两分在之间收音机大声并且收音机安静AGN被上述参数的效果很好解释。而且，我们独立关于每个参数讨论AGN的收音机大声的衍生物。另外，AGN的收音机大声上的螺丝钉不稳定性的效果被讨论。

简介：

简介：Inthispaper,wedevotetoconstructingtheone-sidedempiricalBayes(EB)testforthelocationparameterintheGammadistributionbynonparametricmethod.Undersomemildconditions,weprovethattheEBtestisasymptoticallyoptimalwiththerateoftheorderO(n-δs/2s+1),where1/2≦δ<1ands>1isagivennaturalnumber.Anexampleisalsogiventoillustratethattheconditionsofthemaintheoremsareeasilysatisfied.

简介：ＳＴＵＤＹＯＦＡＤＩＶＩＣＥＯＮＴＨＥＷＡＴＣＨＦＯＲＰＡＲＡＭＥＴＥＲＯＦＢＬＯＯＤＰＲＥＳＳＵＲＥＡＮＤＩＴＳＦＬＯＷＢＹＵＮＤＡＭＡＧＥＤＭＥＴＨＯＤＳＴＵＤＹＯＦＡＤＩＶＩＣＥＯＮＴＨＥＷＡＴＣＨＦＯＲＰＡＲＡＭＥＴＥＲＯＦＢＬＯＯＤＰＲＥＳ...

简介：Thispaperisconcernedwiththethermoelasticbehaviorsofanelasticmediumwithvariablethermalmaterialproperties.Theproblemisinthecontextoffractionalorderheatconduction.Thegoverningequationswithvariablethermalpropertieswereestablishedbymeansofthefractionalordercalculus.Theproblemofahalf-spaceformedofanelasticmediumwithvariablethermalmaterialpropertieswassolved,andasymptoticsolutionsinducedbyasuddentemperatureriseontheboundarywereobtainedbyapplyinganasymptoticapproach.Thepropagationsofthermoelasticwaveandthermalwave,aswellasthedistributionsofdisplacement,temperatureandstresseswereobtainedandplotted.Variationsinthedistributionswithdifferentvaluesoffractionalorderparameterwerediscussed.Theresultswerecomparedwiththoseobtainedfromthecaseofconstantmaterialpropertiestoevaluatetheeffectsofvariablematerialpropertiesonthermoelasticbehaviors.

简介：瞬间电容器的高频率CV曲线被学习了。氧化物层什么时候是厚的，被显示出半古典作品模型是到到古典模型的量模型和途径的好近似。这个结论提供我们一有效(半古典作品)包括量为机械效果建模为极端薄氧化物做参数抽取设备。这里，有效提取策略被设计，数字实验表明策略的有效性。

简介：Inthispaper,theexponentialstabilityanalysisforODEswitchedsystemswithtimedelayisextendedtodistributedparameterswitchedsystems(DPSS)inHilbertspace.Foragivenfamilyofexponentialstablesubsystems,thispaperfocusesonfindingconditionstoguaranteetheoverallDPSS'exponentialstability.Basedonsemigrouptheory,byapplyingpiecewiseLyapunov-Krasovskiifunctionalsmethodincorporatedaveragedwelltimeapproach,sufficientconditionsforexponentialstabilityarederived.Theseconditionsaregivenintheformoflinearoperatorinequalities(LOIs)wherethedecisionvariablesareoperatorsinHilbertspace,andthestabilitypropertiesdependonswitchingrule.Beingappliedtoheatswitchedpropagationequations,theseLOIsarereducedtostandardLinearMatrixInequalities(LMIs).Finally,anumericalexampleisgiventoillustratetheeffectivenessoftheproposedresult.

简介：Alow-diffusionpreconditioningRoeschemewithanadjustableparametertocontrolthenumericaldissipationisproposed.Thisschemereflectstherealphysicaldissipationintheextremelylow-speedregion.Thepreconditioningparameterinschemeisimprovedbylinearcut-offandcorrectionfactor.Thenumericalresultsoflow-Mach-number/low-Reynolds-numbersteadysolutionsofviscousflowspastacircularcylinderandpastaNACA0012airfoilshowtheefficiencyofthenewscheme.

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简介：ThesoftswitchingareweldinginverterreducesswitchinglossesandimprovesoperatingenvitonmentofdevicesbyusingZero-Voltage-Transition(ZVT)technique.Step-by-stepanalysisofeachtimingintervalandtheassociatingvoltageandcurrentwaveformsareincludedfortheFull-BridgeZero-Voltage-SwitchedPWMcomerter,Numerousdesignequationssupportingthephase-shiftedsoftswitchingtechniquearehighlighte.

简介：Inthispaper,theproblemofParameterestimationinlineardelayedsystemsfromsampleddataistreated.Usingnumericalintegraloperation(NIO),anidentificationmodelwhichisparametrizeddirectlyinthelineardelayedsystempa-rametersisgot.Withtheleastsquare(LS)methodortheinstrumentalvariable(Ⅳ)method,therecursivealgorithmofparameterestimationisgiven.Theresultoftheillustratedexampleshowsthatthisalgorithmissimple,rapidandaccurrate.