简介：Intherepresentationofnaturalandsocialphenomena,thereexistnotonlyordinaryorpartialdiferentialequationswhichareindependentofthepaststatesanddeterminedsolelybythepresentstates,butalsotimedelaydiferentialequationswhicharerelatedtosomeof更多还原

简介：Inthisnote,thedissipativecontrolproblemofthegeneralquadraticsupplyrateforstatedelayedsystemsisconsidered.Asystematicapproachisusedinthisworksothatasufficientconditionontheexistenceofadelay-independentstatefeedbackcontrollerisgiven.Inaddition,asufficientconditionontheexistenceofadelay-dependentstatefeedbackispresented.Oursolutionsareexpressedintermsofmatrixinequalitiesthatcanbesolvedbynumericalmethod.Thedelay-dependentcontrollermightbelessconservativethanthedelay-independentoneinthesensethatthedelay-dependentcasemayhaveasolutionforalargerclassofsystemsthanthatfordelay-independentcase.

简介：ObjectiveSinceHelms'successfulbilateralcochlearimplantationwithgoodresultsin1996,therehavebeenincreasingnumberofreportsonbilateralcochlearimplantation.Mostseconddevicehavebeenimplantatedwithinoneyearafterthefirst.Consideringeffectsoflongtimeauditorydeprivation,itisnotclearwhetheradelayedsecondcochlearimplantservestoaddadditionalbenefitsandhowitmayinteractwithcentralnervoussystemplasticity.MethodsThreecaseswhoreceiveddelayedsecondcochlearimplantsatPeople'sHospitalofPekingUniversityfrom2002to2005werereviewed.Theintervalbetweenthefirstandsecondimplantswaslongerthan2yearsinallthreepatients.Soundperception,andunilateral/bilateralspeechdiscriminationinquietandnoisewereevaluated.Inaddition,GAPdetectiontestwasconductedinonepatient.ResultsInonecase,havingbothimplantsonprovidedimprovedperformancecomparedtousingonlyoneimplantbothinquietandnoise.Presumablyduetovisualinterferencefromlip-readingorshortintervalbetweensecondimplantandtesting,onepatientshowednoimprovementfromusingthesecondimplanteitherinquietornoise,whilethelastcasedemonstratedadditionalbenefitsfromthesecondimplantonlyinquiet.Inallthreepatients,performanceinrecognizingthefourtonesinMandarinwassuperioroverwordrecognition.ConclusionsConsiderableplasticityinthecerebralauditorycenterispreserved,despitelongacousticdeprivationinsomechildrenwhohavereceivedunilateralcochlearimplant.Delayedsecondimplantscanresultinsignificantimprovementsinsomeofthesechildren.Visualinterferencefromlip-readingmaybeanobstacleduringretraining.ThebetterrecognitionoftonesintheMandarinlanguagemayrepresentadifferentsounddiscriminationmechanismintheauditorysystem,althoughitmayalsoberelatedtothesignalprocessingmechanismsoftheimplantused(MED-ELCOMBI40+).

简介：Inthispaper,westudyasimplifiedmodelwithdelayforacontroloftestosteronesecretion.EmployingtheejectivefixedpointprincipleduetoNussbaum,theexistenceofslowlyoscillatingperiodicsolutionofthemodelisprovenwhenthedelayparameterr>r0,forsomeconstantr0>0.

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简介：这份报纸与推迟的中子和一般边界条件处理一个非线性的运输方程。我们建立，经由Lp-spaces(1p<+)。本地、非本地的进化问题被讨论。

简介：Arobustadaptivepredictorisproposedtosolvethetime-varyinganddelaycontrolproblemofanoverheadcranesystemwithastereo-visionservo.Thepredictorisbasedontheuseofarecurrentneuralnetwork(RNN)withtappeddelays,andisusedtosupplythereal-timesignaloftheswingangle.Therearetwotypesofdiscrete-timecontrollersunderinvestigation,i.e.,theproportional-integral-derivative(PID)controllerandtheslidingcontroller.Firstly,adesignprincipleoftheneuralpredictorisdevelopedtoguaranteetheconvergenceofitsswingangleestimation.Then,animprovedversionoftheparticleswarmoptimizationalgorithm,theparallelparticleswarmoptimization(PPSO)methodisusedtooptimizethecontrolparametersofthesetwotypesofcontrollers.Finally,ahomemadeoverheadcranesystemequippedwiththeKinectsensorforthevisualservoisusedtoverifytheproposedscheme.Experimentalresultsdemonstratetheeffectivenessoftheapproach,whichalsoshowtheparameterconvergenceinthepredictor.

简介：Thispaperconsidersaclassofdelayedrenewalriskprocesseswithathresholddividendstrategy.ThemainresultisanexpressionoftheGerber-ShiuexpecteddiscountedpenaltyfunctioninthedelayedrenewalriskmodelintermsofthecorrespondingGerber-Shiufunctionintheordinaryrenewalmodel.Subsequently,thisrelationshipisconsideredinmoredetailinboththestationaryrenewalriskmodelandtheruinprobability.

简介：Ｄｅｔｅｃｔｉｏｎ　ｏｆ　Ｗｅａｋ　β~－ｄｅｌａｙｅｄ　γ　Ａｃｔｉｖｉｔｉｅｓ　ｉｎ　Ｅｌｅｍｅｎｔ－ｓｅｐａｒａｔｅｄ　ＳｏｕｒｃｅＤｅｔｅｃｔｉｏｎｏｆＷｅａｋβ~－ｄｅｌａｙｅｄγＡｃｔｉｖｉｔｉｅｓｉｎＥｌｅｍｅｎｔ－ｓｅｐａｒａｔｅｄＳｏ...

简介：Asystemofthree-unitnetworkswithcoupledcellsisinvestigated.ThegeneralformulaforbifurcationdirectionofHopfbifurcationiscalculatedandtheestimateformulaofperiodoftheperiodicsolutionisgiven.

简介：Recently,someresearchesindicatethatpositivefeedbackcanbenefitthecontrolifappropriatetimedelayisintentionallyintroducedintocontrolsystem.However,mostworkistheoreticalonebutfewareexperimental.Thispaperpresentstheoreticalandexperimentalstudiesofdelayedpositivefeedbackcontroltechniqueusingaflexiblebeamasresearchobject.Thepositivefeedbackweightingcoefficientisdesignedbyusingtheoptimalcontrolmethod.Theavailabletimedelayisdeterminedbyanalyzing...

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简介：在这份报纸，一个最佳的H鈭?控制算法被用于在一座有多层楼的大楼的第一个故事安装由于地震刺激减少它的interstory飘移的一个活跃的腱系统的设计。完成最佳的控制性能并且保证控制系统的稳定性，选择控制参数纬和伪的最佳策略被开发。分析表情上面并且纬和伪的更低的界限与州的反馈控制为一个单个degree-of-freedom系统被获得。为纬和伪的选择范围图形地被定义以便控制系统总是是稳定的，控制性能比由常规LQR控制算法好。来自在真实地震刺激下面的一座控制三故事的大楼的数字结果证明山峰第一interstory飘移能显著地在10%造的重量附近与最大的控制力量被减少。一份最佳设计流动图表被提供。为推迟时间的结构，另外，这研究给了明确的公式计算纬和伪的批评价值。系统稳定性和控制性能能因此甚至与时间延期被保证。

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简介：EmbrechtsandVeraverbekeinvestigatedtherenewalriskmodelandgaveatailequivalencerelationshipoftheruinprobabilities(?)(x)undertheassumptionthattheclaimsizeisheavy-tailed,whichisregardedasaclassicalresultinthecontextofextremalvaluetheory.Inthisnoteweextendthisresulttothedelayedrenewalriskmodel.

简介：Inthispaper,thedynamicsofadelayedphytoplankton-zooplanktonmodelisconsidered.Takingthedelayduetothegestationofzooplanktonasparameter,wedescribethelocalHopfbifurcationbycentermanifoldtheoremandnormalform,thenwediscusstheglobalexistenceofperiodicsolution.Atlast,somesimulationsaregiventosupportourresult.

简介：ThispaperstudiesthelocaldynamicsofanSDOFsystemwithquadraticandcubicstiffnessterms,andwithlineardelayedvelocityfeedback.Theanalysisindicatesthatforasufficientlylargevelocityfeedbackgain,theequilibriumofthesystemmayundergoanumberofstabilityswitcheswithanincreaseoftimedelay,andthenbecomesunstableforever.Ateachcriticalvalueoftimedelayforwhichthesystemchangesitsstability,agenericHopfbifurcationoccursandaperiodicmotionemergesinaone-sidedneighbourhoodofthecriticaltimedelay.ThemethodofFredholmalternativeisappliedtodeterminethebifurcatingperiodicmotionsandtheirstability.Itstressesontheeffectofthesystemparametersonthestableregionsandtheamplitudesofthebifurcatingperiodicsolutions.

简介：为前列腺癌症介绍雄激素剥夺治疗的最适当的时间仍然保持争论。我们的目的是在在老鼠前列腺(流浪者)的转基因的腺癌的癌症前进和幸存建模的前列腺上评估早对推迟的外科的阉割的效果。流浪者老鼠随机被划分成三个组：早阉割组(在哪个上阉割在4个星期岁时被执行)，推迟的阉割组(在哪个上当腹的瘤能被摸时，阉割被执行)，并且假冒阉割组。老鼠每天在整个他们的生活被监视直到癌症相关的死亡或显然垂死的外观，在时间，单个老鼠被打死的发展。在前列腺瘤的雄激素受体表达式也被计算。在早阉割，推迟的阉割和假冒阉割的平均lifespan组织的结果表演分别地是54.1个星期，59.9个星期和39.1个星期。当时，早阉割和推迟的阉割授与一个统计上重要的幸存优点与假冒阉割组相比(P<0.001)。然而，在在早阉割组和推迟的阉割组之间的lifespan的差别不是统计上重要的(P=0.85)。在收到了早或推迟的阉割的TRAMP老鼠的lifespan的增加比假冒阉割老鼠在死亡与更低的G/B价值(泌尿生殖器的道重量/身体重量)相关。在结论，在流浪者老鼠的早、推迟的阉割延长了幸存到类似的程度。这发现可以在前列腺癌症治疗为临床的实践提供一个指南。