简介：蛋白质符合构造上的水的影响被在不同的水系统模仿模型蛋白质溶解酵素的分子的动力学调查。有有六戒指的水的水模型和溶解酵素水簇系统建模的TIP3P的溶解酵素水系统被评估。另外，在溶解酵素附近的溶剂的光线的分发功能是计算的。在溶解酵素附近的水分子的分发类似于水簇的，这被发现。二面的角度的分析和溶解酵素的二硫化物契约证明溶解酵素的符合构造严重地在溶解酵素水系统与那相比在溶解酵素水簇系统被损坏。这差别能被归因于在溶解酵素和水簇之间的分子间的氢契约的更大的数字的形成。是与分析一致水簇能在溶解酵素的热变性作用的过程改变变性作用的度。

简介：Basedontheboundaryintegralmethod,a3Dbubblebreakupmodelinanarrowflowfieldisestablished,andacorrespondingcomputationprogramisdevelopedtosimulatethesymmetricalandasymmetricalbubblebreakup.Thecalculatedresultsarecomparedwiththeexperimentalresultsandagreewiththemverywell,indicatingthatthenumericalmodelisvalid.Basedonthebasicbehaviorofbubblesinanarrowflowfield,thesymmetricalandasymmetricalbubblebreakupisstudiedsystematicallyusingthedevelopedprogram.Afeasibilityruleof3Dbubblebreakupispresented.Thedynamicsofsub-bubblesaftersplittingisstudied.Theinfluencesofcharacteristicparametersonbubblebreakupandsub-bubbledynamicsareanalyzed.

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简介：AheavystormrainfallcausedbyTyphoonAere(No.0418)whenlandingatFujianhasbeensuccessfullysimulatedbyusingAREMmodel.Thesimulationresultisscale-separatedbyspatialband-passfiltering,whichrevealsthemesoscalelowpressureandconvergencelinethathasdirectimpactonthisrainfallprocess.Thephysicalcharacteristicsofthetwomesoscalesystemsandtheirrelationwithrainfallarealsoanalyzed.Studyshowsthatthereexistsawellcorrespondingrelationshipbetweenthestormrainfallandmesoscaledivergenceandstrongupdraftarisingfromtheconvergence,whichiscausedbytheinteractionsbetweenthemesoscalesystemsandtopographicfeatures,andisdirectlyresponsiblefortherainfall.

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简介：ThenormalhypervelocityimpactofanAl-thinplatebyanAl-spherewasnumericallysimulatedbyusingtheadaptivesmoothedparticlehydrodynamics(ASPH)method.Inthismethod,theisotropicsmoothingalgorithmofstandardSPHisreplacedwithanisotropicsmoothinginvolvingellipsoidalkernelswhoseaxesevolveautomaticallytofollowthemeanparticlespacingasitvariesintime,space,anddirectionaroundeachparticle.UsingtheASPH,theanisotropicvolumechangesunderstrongshockconditionarecapturedmoreaccuratelyandclearly.ThesophisticatedfeaturesofmeshlessandLagrangiannatureinherentintheSPHmethodarekeptfortreatinglargedeformations,largeinhomogeneitiesandtracingfreesurfacesintheextremelytransientimpactprocess.Atwo-dimensionalASPHprogramiscodedwithC++.Thedevelopedhydrocodeisexaminedforexampleproblemsofhypervelocityimpactsofsolidmaterials.Theresultsobtainedfromthenumericalsimulationarecomparedwithavailableexperimentalones.Goodagreementisobserved.

简介：这份报纸为二的模拟论述一个计算液体动力学模型--维(2-D)水流动，沉积运输，河岸失败过程，和随后的隧道模式变化。在隧道拐弯的第二等的水流的效果在水流动的修改动量保存方程被包括。一个改进河岸失败模型被使用由于河床侵蚀计算河岸失败，并且模仿冲积隧道的侧面的迁居和平面形状变化。水流动模型在作者设计的连续拐弯用流动的实验室大小被验证了，除了从文学的斜槽测试数据。

简介：A2DmodelaboutcharginganddischargingprocessesinthundercloudisusedtosimulatethreedifferentialatmosphericstratificationsresultingindiscrepantthunderstormprocessesinBeijingregion.Thedynamicandmicrophysicalprocessesinthunderstormandtheirinfluenceonlightningactivitiesarealsdiscussed.Theresultsindicatethatascendingvelocityandwatervaporarethemostimportantfactorstoinfluencelightningactivities.Atthesametime,theyaffecteachotherandaretogethercontrolledbyatmosphericstratification.Themagnitudeoftheascendingvelocitydeterminestheintensityofstormandthetimewhenthethunderstormmatured.Thethunderstormwithstrongupdraftscanreachalargeheightinashorttime.Strongpersistentupdraftsandsufficientwatervaporwhichhelptogeneratemoreicephasehydrometeorsthatdirectlyinfluencecharginganddischargingprocesswillprolongthematurestageofthethunderstormandtherebyenhancelightningactivities.Thoughthebigdensityoficephasehydrometeorscanbeformed,itisdifficulttosustainalongtimeintheconditionofstrongupdraftsandscantwatervapor.Undertheconditionofweakupdraftsandsufficientwatervaporinthewholelevels,itiseasytoformwarmcloudprocessinwhichtheicephaseprocessandlightningactivitiesareweak.Thefavorablestratificationconditionsforstronglightningactivitiesarethesufficientvaporintheloweratmosphere,moderatehumidityinthemidtroposphere,biginstabilityenergyandsomesuitableconvectiveinhibition.Throughcalculatingsomeatmosphericinstabilityparameters,itisindicatedthatconvectiveinstabilityindexsmallerthan-10℃(negativemeansinstable),convectiveavailablepotentialenergylargerthan1000Jkg~(-1),convectiveinhibitionlargerthan40Jkg~(-1),the700-hPapotentialequivalenttemperaturelargerthan340Kandthe35%-85%humidityinthemidtroposphere(700-400hPa)aretheadvantageousconditionsforstronglightningactivities.

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简介：Usingmoleculardynamics(MD)methodscombiningwithtwo-stepradiationheatingmodel,themechanismsofablationandthethermodynamicstatesatNisurfaceunderfemtosecondlaserirradiationareinvestigated.Simulationresultsshowthatthemainmechanismsofablationareevaporationandtensilestressesgeneratedinsidethetarget.Thevelocityofstresswaveispredictedtobenearlyequaltosoundvelocity.Theratesofablationatdifferentfluencesobtainedfromsimulationsareingoodagreementwithexperimentaldata.Superheatingphenomenonisalsodiscovered.

简介：Inthispaper,adrivingstressfiniteelementmethodofelastic-plasticlargedeformationbasedonimplicittimeintegratingalgorithmandaneight-chainmolecularnetworkmodelisusedforthenumericalsimulationofthesimplesheartestofpolycarbonate(PC)materials.Thesimulatedresultsarecomparedwithexperimentalones.Thestrainlocalizationpropagationfortheshearbanddeforma-tionforsimplesheardeformationisinvestigatednumerieaUy.TheeffectsofmicrostructureparametersinthemodelonstrainsofteningandorientationhardeningofthePCarediscussedindetail.

简介：一个数学模型被提出了基于为在水的暂停调查microparticles的沉积行为联合了连续、分离的粒子方法由把同样连续的液体阶段和粒子阶段当作分离，因此允许要列在后面的单个粒子和作为时间的功能要调查的粒子阶段的结构的进化的行为。模型考虑大多数包括货车derWaals对单个粒子起作用的占优势的力量吸引人，静电排斥，重力，Brownian，弄空，位，联系并且拖力量。代码也基于模型被开发了。这份报纸报导在各种各样的条件下面在水的暂停安定的单音分散microparticles的一些初步的建模结果。结果显示出液体阶段的短时间动力学，它有一个类似的数量级到粒子阶段。当他们的尺寸变得很小时，如此的短时间动力学能忍受意义到象粒子聚集那样的过程。结果的初步的分析也在粒子基于一个最新建议的参数安定的进化上被执行了，本地规范的卷部分(LNVF)。

简介：为了在舷窗调查衣袋的效果，在金属流动上死，在忍受出口和挤出负担的die的温度被对比与传统死没有衣袋在的设计更低死。二个不同多洞舷窗有或没有衣袋死在更低死被设计。并且挤出过程基于商业软件DEFORM-3D被模仿。模拟结果证明衣袋能被用来有效地以金属流动在腿下面调整金属流动和特别利益。另外，在适用的die的最大的温度和山峰挤出负担减少，它显示增加挤出速度和生产率的可能性。

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

简介：顺序的蒙特卡罗模拟方法被介绍给对microgrid，和Weibuil分布的可靠性评价风速度模型被造模仿时时弯屈与一个二状态的可靠性模型相结合的一个特定的site.Wind汽轮机发电机模型的速度被用于蒙特卡罗模拟方法，并且结果证明风汽轮机可靠性与顺序的蒙特卡罗simulation.A为工作建模很好微煤气的汽轮机的二状态的可靠性模型和从IEEErelia的一个负担模型

简介：Simulationmethodisanimportant-toolinfinancialriskmanagement.Itcansimulatefinancialvariableoreconomicwriableanddealwithnon-linearornon-nominalissue.Thispaperanalyzestheusageof"MonteCarlo"approachincommercialbankriskmanagement.

简介：Inordertoimplementlarge-scaleandhigh-betatokamaksimulation,anewalgorithmoftheelectromagneticgyrokineticPIC（particle-in-cell）codewasproposedandinstalledontheGpic-MHDcode[GyrokineticPICcodeformagnetohydrodynamic（MHD）simulation].Inthenewalgorithm,thevorticityequationandthegeneralizedOhm’slawalongthemagneticfieldarederivedfromthebasicequationsofthegyrokineticVlasov,Poisson,andAmperesystemandareusedtodescribethespatio-temporalevolutionofthefieldquantitiesoftheelectrostaticpotentialφandthelongitudinalcomponentofthevectorpotentialAz.Thebasicalgorithmisequivalenttosolvingthereduced-MHD-typeequationswithkineticcorrections,inwhichMHDphysicsrelatedtoAlfvenmodesarewelldescribed.Theestimationofperturbedelectronpressurefromparticledynamicsisdominant,whiletheeffectsofothermomentsarenegligible.Anotheradvantageofthealgorithmisthatthelongitudinalinducedelectricfield,Etz=-■z/■t,isexplicitlyestimatedbythegeneralizedOhm’slawandusedintheequationsofmotion.Furthermore,theparticlevelocitiesalongthemagneticfieldareused（vz-formulation）insteadofgeneralizedmomentums（pz-formulation）,hencethereisnoproblemof’cancellation’,whichwouldotherwiseappearwhenAzisestimatedfromtheAmpere’slawinthepz-formulation.ThesuccessfulsimulationofthecollisionlessinternalkinkmodebythenewGpic-MHDwithrealisticvaluesofthelarge-scaleandhigh-betatokamaksrevealedtheusefulnessofthenewalgorithm.

简介：Boththeoreticalandfieldobservationswereexaminedtostudythecloserelationshipbetweensoildegenerationandtheevolutionofgrasslandvegetation.Ageneraln-speciesmodelofequalcompetitionunderdifferentdegreesofsoildegradationwasappliedtofielddatainordertoprobethedynamicprocessesandmechanismsofvegetationevolutionduetotheeffectsofthesoil'secologicaldeteriorationongrasslandvegetation.Comparisonsweremadebetweenthetheoreticalresultsandthepracticalsurveyswithsatisfactoryresults.

简介：Theinfraredcameraisusedtoinvestigatethetemperaturefieldofgasmetalarcwelding.Theresultsshowthatthetemperaturedistributionofweldpoolandadjacentareaappearsconeshape.AnewheatsourcemodelcombinedbyGaussiandistributionheatsourceofthearcandconicaldistributionheatsourceofthedropletissetupbasedontheexperimentalresults,andwiththecombinedboundaryconditions,thetemperaturefieldofgasmetalarcweldingissimulatedusingfiniteelementmethod.AccordingtothecomparisonbetweentheresultsofexperimentandsimulationintemperaturefieldshowsthatthenewcombinedheatsourcemodelismoreaccurateandeffectivethantheGaussheatsourcemodel.