简介：到动态系统的可靠性分析的僵绳点近似的应用程序被调查。处于可靠性问题的失败事件在规定阀值水平上作为一个单个性能变量的exceedance被提出。僵绳点近似技术提供一种选择估计表演变量的累积分布函数(CDF)。失败概率在指定阀值作为补充CDF的价值被获得。方法要求从取决于产生性能变量的功能(CGF)的cumulant的一个简单代数学的方程计算僵绳点。为用表演变量的随机的样品计算僵绳点的一个方法被介绍。僵绳点近似的适用的区域详细被讨论。A10故事砍与白噪音刺激造模型说明建议方法论的精确性和效率。

简介：消费者们对容易腐烂的食物的质量给予越来越多的注意，它被存储温度主要影响。这份报纸在温度控制下面为容易腐烂的食物论述一个动态定价模型。为了最大化全部的利润，最佳的价格和存储，温度用Pontryagins最大的原则被获得。一个静态的定价模型被提供与动态的作比较。它被动态政策能比静态的使更多的收入成为的一个数字例子显示出。而且，经理的含意被分析，建议方法的有效性被表明。

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简介：AccordingtoLorenz,chaoticdynamicsystemshavesensitivedependenceoninitialconditions(SDIC),i.e.,thebutterfly-effect:atinydifferenceoninitialconditionsmightleadtohugedifferenceofcomputer-generatedsimulationsafteralongtime.Thus,computer-generatedchaoticresultsgivenbytraditionalalgorithmsindoubleprecisionareakindofmixtureof'true'(convergent)solutionandnumericalnoisesatthesamelevel.Today,thisdefectcanbeovercomebymeansofthe'cleannumericalsimulation'(CNS)withnegligiblenumericalnoisesinalongenoughintervaloftime.TheCNSisbasedontheTaylorseriesmethodathighenoughorderanddatainthemultipleprecisionwithlargeenoughnumberofdigits,plusaconvergencecheckusinganadditionalsimulationwithevensmallernumericalnoises.Intheory,convergent(reliable)chaoticsolutionscanbeobtainedinanarbitrarylong(butfinite)intervaloftimebymeansoftheCNS.TheCNScanreducenumericalnoisestosuchalevelevenmuchsmallerthanmicro-leveluncertaintyofphysicalquantitiesthatpropagationofthesephysicalmicro-leveluncertaintiescanbepreciselyinvestigated.Inthispaper,webrieflyintroducethebasicideasoftheCNS,anditsapplicationsinlong-termreliablesimulationsofLorenzequation,three-bodyproblemandRayleigh-Bénardturbulentflows.UsingtheCNS,itisfoundthatachaoticthree-bodysystemwithsymmetrymightdisruptwithoutanyexternaldisturbance,say,itssymmetry-breakingandsystem-disruptionare'self-excited',i.e.,out-of-nothing.Inaddition,bymeansoftheCNS,wecanprovidearigoroustheoreticalevidencethatthemicro-levelthermalfluctuationistheoriginofmacroscopicrandomnessofturbulentflows.Naturally,muchmoreprecisethantraditionalalgorithmsindoubleprecision,theCNScanprovideusanewwaytomoreaccuratelyinvestigatechaoticdynamicsystems.

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简介：Theproblemofrecognizingnaturalscenes,suchaswater,smoke,fire,wind-blownvegetationandaflockofflyingbirds,isconsidered.Thesescenesexhibitthecharacteristicdynamicpattern,buthavestochasticextent.Theyarereferredtoasdynamictexture(DT).Inreality,thediversityofDTsondifferentviewpointsandscalesareverycommon,whichalsobringgreatdifficultytorecognizeDTs.Inthepreviousstudies,duetonoconsideringofthedeformableandtransientnatureofelementsinDT,themotionestimationmethodisbasedonbrightnessconstancyassumption,whichseeminappropriateforaggregateandcomplexmotions.Anovelmotionmodelbasedonrelativemotionintheneighborhoodoftwo-dimensionalmotionfieldsisproposed.Theestimationofnon-rigidmotionofDTsisbasedonthecontinuityequation,andthenthelocalvectordifference(LVD)isproposedtocharacterizeDTlocalrelativemotion.SpatiotemporalstatisticsoftheLVDsisusedastherepresentationofDTsequences.ExcellentperformancesofclassifyingallDTsinUCLAdatabasedemonstratethecapabilityoftheproposedmethodindescribingDT.

简介：到水泥的动态性质使遭到了到冲动的装载的学习，在不同速度的水泥的压力时间曲线用裂口Hopkinson压力酒吧(SHPB)被测量。动态收益力量和水泥的组成的关系上的温度和紧张率的效果被分析。当它在相对低的温度时，增强的水泥的动态机械性质被使遭到高拉紧率。但是与温度增加，弄软效果的温度做水泥的力量变弱并且水泥的影响坚韧是突出地相对紧张率效果。那么，拉紧率效果，紧张变硬和在在他们之间的水泥和关系的动态机械能力上一起弄软工作的温度是相对复杂的。

简介：Unmannedaerialvehicles(UAVs)mayplayanimportantroleindatacollectionandoffloadinginvastareasdeployingwirelesssensornetworks,andtheUAV’sactionstrategyhasavitalinfluenceonachievingapplicabilityandcomputationalcomplexity.Dynamicprogramming(DP)hasagoodapplicationinthepathplanningofUAV,butthereareproblemsintheapplicabilityofspecialterrainenvironmentandthecomplexityofthealgorithm.BasedontheanalysisofDP,thispaperproposesahierarchicaldirectionalDP(DDP)algorithmbasedondirectiondeterminationandhierarchicalmodel.WecompareourmethodswithQ-learningandDPalgorithmbyexperiments,andtheresultsshowthatourmethodcanimprovetheterrainapplicability,meanwhilegreatlyreducethecomputationalcomplexity.

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简介：Forevaluationofthepermanentdeformationofaseaembankmentunderstochasticearthquakeexcitation,arobustdynamicriskanalyticalmethodispresentedbasedonconventionalpermanentdeformationanalysisandstochasticseismicresponseanalysis.Thismethodcanpredictnotonlythemeanvalueofmaximumpermanentdeformationbutalsothereliabilitycorrespondingtodifferentdeformationcontrolstandards.TheearthquakemotionismodelledasastationaryGaussianfilteredwhitenoiserandomprocess.Thepredictedaveragemaximumhorizontalpermanentdisplacementisinagreementwiththeconventionalresult.Furtherstudiedarethereliabilityofpermanentdeformationduetostochasticwavedetailsatoneseismicmotionlevelandtheriskofpermanentdeformationduetostochasticseismicstrength,i.e.,themaximumaccelerationinalongperiod.Therefore,itispossibletomaketheoptimaldesignintermsofsafetyandeconomyaccordingtotheimportanceofaseaembankment.Itissuggestedthattheimprovedstochasticseismicmodelthatcancatchthebehaviorofthenon-stationaryrandomprocessforseaembankmentsshouldbefurtherstudiedinfuture.

简介：动态系统被考虑的流行病毒传播人口的一个类。用功能的homotopic分析方法，第一，起始的近似功能被选择。然后，任意的顺序近似分析答案连续地被获得。最后，获得的近似分析答案的精确性被描述。为流行病毒传播人口的各种各样的物理参数的影响动态系统被讨论。

简介：Aninvestigationoftheventilatedsupercavitationforasupercavitatingvehiclepitchingupanddowninthesupercavitywascarriedoutinahigh-speedwatertunnel.Theemphasisislaidontheunderstandingoftheinteractionofthevehicleaftbodywiththecavityboundary.Theflowcharacteristicsweremeasuredandthestabilityofsupercavitingflowwithdifferentpitchingfrequenciesandamplitudeswasanalyzed.Inparticular,theobjectivesofthisstudyaretounderstandtheeffectoftheimpactuponthecavitydistortion,andtoquantifytheimpactprocessbyinvestigatingtheevolutionofthepressureinsidethecavityandthentheloadsonthevehicleduringthepitchingmotion.Itisalsoshownthattheevolutionofthepressuredetectedindifferent,asinsidethesupercavity,iscoherentanduniformduringtheperiodsofthepitchingmotion.Thisstudyisofdirectrelevancetoreliableandaccuratepredictionofhydrodynamicloadsassociatedwiththeslammingandimpactonsupercavitatingvehicles.

简介：Thedynamicmechanicalpropertiesofwoodpowder/polypropylenecompositeswithdifferentwoodcontenttreatedanduntreatedwiththecompatibilizerhavebeenstudied.Ithasbeenfoundthatadditionofwoodpowdersandthecompatibilizercanbothimprovetheviscoelasticityofcomposites.Glasstransitiontemperature(Tg)ofappropriatewoodpowder-filledcompositesdecreased.Thevalueforthestoragemodulus(G')increasedgraduallywithincreasingwoodpowdercontent.Theadditionofthecompatibiliz...

简介：Anintervaloptimizationmethodforthedynamicresponseofstructureswithintervalparametersispresented.Thematricesofstructureswithintervalparametersaregiven.Combiningtheintervalextensionwiththeperturbation,themethodforintervaldynamicresponseanalysisisderived.Theintervaloptimizationproblemistransformedintoacorrespondingdeterministicone.Becausethemeanvaluesandtheuncertaintiesoftheintervalparameterscanbeelecteddesignvariables,moreinformationoftheoptimizationresultscanbeobtainedbythepresentmethodthanthatobtainedbythedeterministicone.Thepresentmethodisimplementedforatrussstructure.Thenumericalresultsshowthatthemethodiseffective.

简介：Thispaperstudiesdynamicpricingandcooperativeadvertisingstrategiesinatwo-memberchannelofdistribution.Weproposedifferentialgamemodelsthatincorporatethecarryovereffectsofadvertisingovertimeforbothmanufacturerandretailer.Twodifferentmodelsarestudied.Firstly,wediscussedanon-cooperativedifferentialgamewhichthemanufacturersupportspartiallythecostofthepromotionactivities.Secondly,bothchannelmemberscooperativelydeterminetheirrespectivestrategies.Inthesetwocases,dynamiccooperativeadvertisingandpricingstrategiesarecharacterized.Thennumericalsimulationmethodisappliedtoanalyzethesensitivityofmainmodelparametersandcomparethemainresultsofthetwomodels.Thesimulationresultsshowthatthecooperativemodelachievesbettercoordinationthanthenon-cooperativemodelwiththefollowingfeatures:allchannelmembersachievehigheradvertisingeffortsandprofitlevelinthecooperativecaseratherthanindienon-cooperativecase.

简介：Thesubsea动态起床人底(SDRB)是为漂浮的生产站台绳索系统的设备的一重要的片。一结束被连接，带热扩大负担和其它结束的一条僵硬管道，带灵活起床人的动态负担僵硬管道被连接到一个灵活起床人，它的功能因此是在灵活起床人和在海床上修理灵活起床人的僵硬管道之间的一个转变连接。作为一个典型subsea产品，在另一方面，设计将为subsea产品满足标准的要求。由学习尖的干舷和subsea管道的压力analysisphilosophy，为SDRB的尖压力分析的一个物理模型和过程被建立了。负担被考虑了的不利设计的条件，和从僵硬管道和动态负担灵活性的静态的负担的联合也被优化了。并且在为有检查规则的尖应力的AMSE，DNV和API标准之间的比较分析被做了。因为SDRB属于subsea管道终端产品，DNV标准的使用尖应力被推荐检查它的进程。最后，这个过程SDRB的尖应力被计算了，并且结果证明夹克衫管子和SDRB的搬运人管子压力处理尖当whole.The舱壁不能被在详细分析使用FEA软件ANSYS的AutoPIPE软件精确地模仿，满足DNV标准，但是检查结果将仍然满足DNV标准的要求。

简介：—Effectivestressanalysisisperformedtoevaluatetheresidualdisplacementofacaissonquaywallduring1994Hokkaido-Toho-OkiEarthquakeand1993Kushiro-OkiEarthquake.Theconstitutivemodelusedinthisstudyisamultipleshearmechanismtypedefinedinstrainspaceandcantakeintoaccounttheeffectofrotationofprincipalstressaxis.Theearthquakeaccelerationsrecordedattheoutcroppingrockduringtheearthquakeareusedasinputbedrockmotion.Theresultsoffiniteele-mentanalysisareingoodagreementwiththeobservedbehaviourofthequaywall.Theanalysisalsoindi-catesthatliquefactionandhighexcessporewaterpressurehaveasignificanteffectonthedeformationofthecaisson.Soilimprovementisspeculatedasthemostreliablemeasuresagainstliquefaction.Theinflu-enceofsoilimprovementandthereasonableimprovedareaarediscussedinthepaper.

简介：Theresultsofmathematicalmodellingofunsteadyflowconditionscoupledwithspecificsedimenttransportrelationsarepresentedhere.SimultaneoussolutionsofthedeSaintVenantequationswiththreedifferenttransportrelations,namelytheEngelund-Hansenequation,Grafequation,andanempiricalequationarepresented.TheresultsobtainedwerecomparedwiththosefromtheFluvial-12programunderthesameinputconditionsandreasonablecorrelationwasobserved.Theadvantagesofthecoupledmethodforsimultaneoussolutionoftheequationscompriseahigherdegreeofaccuracy,thepossibilityofintroductionofanydesiredtransportequationintothemodelandthepossibilityofintroducinganyboundaryconditionsintothemodelalongsideacompleteunsteadyflowmodelling.

简介：反公羊保护桩系统，在大楼和基础结构附近被安装，能阻止非法的车辆进入，从忍受车辆的即席创作的爆破装置(VBIED)维持距离并且减少相应损坏。与一个固定保护桩系统相比，当当需要时，它能被移开，一个可移动的保护桩系统提供更多的灵活性。这份报纸首先建议评估K4的可移动的反公羊保护桩系统的一种新类型。模仿撞击保护桩系统的车辆的碰撞，一个有限元素模型然后通过数字模拟结果和存在试验性的结果的比较被造并且验证。基于直角的设计方法，影响这个建议系统的安全和经济的因素根据他们的重要性被检验并且排序。一个最佳的设计计划然后被生产。最后，策划验证建议设计的有效性，包括影响测试的二前面影响测试和二个方面，四动态影响测试根据BSI说明被进行了。标本的剩余旋转角度比30o小并且满足BSI说明的要求。