简介：我们为Davey-Stewartson系统学习发作答案(D-S系统，为短)在L<潜水艇class=“a-plus-plus”>x<啜class=“a-plus-plus”>2(<啜class=“a-plus-plus”>2)。首先，我们给D-S系统的解决方案的非线性的侧面分解。然后，我们证明最小的集体发作答案的存在。由使用最小的集体发作答案的特征，最后，我们获得限制侧面和L的精确集体的集中<啜class=“a-plus-plus”>D-S系统的2个发作解决方案。

简介：借助于Tersoff和莫尔斯潜力，三维的分子的动力学模拟被执行显微镜学切在硅上学习原子力量单音的水晶表面。内部在细工品和大头针工具和细工品的原子之间的原子力量自己被计算。螺丝钉脱臼被介绍进细工品Si。脱臼的运动不在切处理的原子力量显微镜学期间发生，这被发现。模拟结果证明shear强调对脱臼起作用在Si的收益力量下面是远的。

简介：Inthepresentresearchtwodifferentwholevehiclemultibodymodelsareestablishedrespectively,includingrigidandrigid-flexiblecouplingmultibodyvehiclemodels.Theformerisallcomposedbyrigidbodieswhileinthelatermodel,theflexiblerearsuspensionisbuiltbasedonthefiniteelementmethod(FEM)andmodesuperpositionmethod,inwhichthedeformationsofthecomponentsareconsidered.Theridesimulationswithdifferentspeedsarecarriedoutona3Ddigitalizedroad,andtheweightedrootmeansquare(RMS)ofaccelerationsontheseatsurface,backrestandatthefeetarecalculated.Thecomparisonbetweentheresponsesoftherigidandrigid-flexiblecouplingmultibodymodelsshowsthattheflexibilityofthevehiclepartssignificantlyaffectstheaccelerationsateachposition,anditisnecessarytotaketheflexibilityeffectsintoaccountfortheassessmentofridecomfort.更多还原

简介：阶段形态学，demixing的批评温度，和为混合由吸水的nanosilica(A200)或恐水病的nanosilica(R974)导致了的polystyrene/poly(乙烯基甲基醚)(PS/PVME)的分子的动力学的变化被调查。与混合矩阵的阶段分离，A200由于在A200和PVME之间的强壮的相互作用移居了进PVME富有的阶段，当R974移动了进PS富有的阶段时。热力学的可混和性和集中变化被A200nanoparticles显著地在A200上由于PVME的表面吸附在混合矩阵的阶段分离期间延迟，从rheological测量和颠倒热能力的削弱的增长在批评区域附近由关联长度验证了(Cp)在经由调制微分扫描的玻璃转变期间热量测定(MDSC)。尽管有对同质的混合矩阵的部分动力学的A200和R974的没有影响，nanosilica导致的限制的链散开仍然发生了。在nanosilica和聚合物部件之间的相互作用能限制混合矩阵的终端松驰并且进一步操作他们的阶段行为。

简介：Thefilmdiffusionmass-transferprocessofadsorptionofphenolonmacroporouspolystyreneresinwasinvestigatedindetail.InordertorevisetheBoydfilmdiffusionkineticsequation,theout-surfacestructureofthemacroporousresinandthatofgel-typeion-exchangeresinwascomparedandthenewfilmdiffusionequationwasalsosuggested.Theseresultsshowedthatthefilmdiffusionwasinfluencedbyporosityofthemacroporousresingreatly,whichdifferedfromthefilmdiffustionbehaviorofion-exchangeresinobviously.

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简介：Thediscreteiterativemapmodelofpeakcurrent-modecontrolledbuckconverterwithconstantcurrentload(CCL),containingtheoutputvoltagefeedbackandrampcompensation,isestablishedinthispaper.BasedonthismodelthecomplexdynamicsofthisconverterisinvestigatedbyanalyzingbifurcationdiagramsandtheLyapunovexponentspectrum.Theeffectsoframpcompensationandoutputvoltagefeedbackonthestabilityoftheconverterareinvestigated.Experimentalresultsverifythesimulationandtheoreticalanalysis.Thestabilityboundaryandchaosboundaryareobtainedunderthetheoreticalconditionsofperiod-doublingbifurcationandbordercollision.Itisfoundthattherearefouroperationregionsinthepeakcurrent-modecontrolledbuckconverterwithCCLduetoperiod-doublingbifurcationandborder-collisionbifurcation.Researchresultsindicatethatrampcompensationcanextendthestableoperationrangeandtransfertheoperatingmode,andoutputvoltagefeedbackcaneventuallyeliminatethecoexistingfast-slowscaleinstability.

简介：Theconformationalanddynamicpropertiesofpolypropylene(PP)forbothpuremeltsandblendswithdifferentchaintacticitywereinvestigatedbyMonteCarlosimulationofisotactic(iPP),atactic(aPP)andsyndiotactic(sPP)polypropylenes.Thesimulationofcoarse-grainedPPmodelswasperformedonahighcoordinationlatticeincorporatingshort-andlong-rangeintramolecularinteractionsfromtherotationalisomericstate(RIS)modelandLennard-Jones(LJ)potentialfunctionofpropanepairs,respectively.ThedynamicsofchainsinbinaryPP/PPmixturewereinvestigatedwiththecompositionofC150H302withdifferentchaintaciticity.ThediffusionratesofPPwithdifferentstereochemistryaregenerallyintheorderas:iPP>aPP>>sPP.ForPP/PPblendswith50:50wt%binarymixtures,immiscibilitywasobservedwhensPPwasintroducedintothemixtures.ThediffusionrateofiPPandaPPbecamesloweraftermixing,whilesPPdiffusessignificantlyfasterinthebinarymixtures.ThemobilityofPPchainsdependsonbothintramolecular(molecularsizeandchainstiffness)andintermolecular(chainpacking)interactions.TheeffectofintramolecularcontributionisgreaterthanthatofintermolecularcontributionforiPPandaPPchainsinbinarymixtures.ForsPPchain,intermolecularinteractionhasgreaterinfluenceonthedynamicsthanintramolecularcontribution.

简介：Thespinningsolarsailoflargescalehasbeenwelldevelopedinrecentyears.Suchasolarsailcanbeconsideredasarigid-flexiblemultibodysystemmainlycomposedofaspinningcentralrigidhub,anumberofflexiblethintethers,sailmembranes,andtipmasses.Asimplifiedinterplanetarykite-craftacceleratedbyradiationoftheSun(IKAROS)modelisestablishedinthisstudybyusingtheabsolute-coordinate-based(ACB)methodthatcombinesthenaturalcoordinateformulation(NCF)describingthecentralrigidhubandtheabsolutenodalcoordinateformulation(ANCF)describingflexibleparts.Theinitialconfigurationofthesysteminthesecond-stagedeploymentisdeterminedthroughbothdynamicandstaticanalyses.Thehugesetofstiffequationsofsystemdynamicsissolvedbyusingthegeneralized-alphamethod,andthusthedeploymentdynamicsofthesystemcanbewellunderstood.

简介：在这份报纸，由定义新州的向量并且开发搬到空间的各种各样的元素的新转移矩阵，multi-rigid-flexible-body系统的分离时间转移矩阵方法被扩展学习multibody系统的动力学，灵活横梁搬到空间。明确的表达和搬到空间的三个摆钟系统被给验证方法的rigid-flexible-body的数字例子。使用新方法学习multi-rigid-flexible-body系统搬到空间的动力学，系统的全球动力学方程不被需要，系统的深奥矩阵的订单是很低的，计算速度高，不管系统的尺寸。新方法简单，直接，实际，并且为multi-rigid-flexible-body系统动力学提供一个强大的工具。

简介：Weproposedynamicterahertz(THz)emissionmicroscopy(DTEM)tovisualizetemporal–spatialdynamicsofphotoexcitedcarriersinelectronicmaterials.DTEMutilizesTHzpulsesemittedfromasamplebyprobepulsesirradiatedafterpumppulseirradiationtoperformtime-resolvedtwo-dimensionalmappingoftheTHzpulseemission,reflectingvariouscarrierdynamics.Usingthismicroscopy,weinvestigatedcarrierdynamicsinthegapregionoflow-temperature-grownGaAsandsemi-insulatingGaAsphotoconductiveswitchesoftheidentical-dipoletype.TheobservedDTEMimagesarewellexplainedbythechangeintheelectricpotentialdistributionbetweentheelectrodescausedbythescreeningeffectofthephotoexcitedelectron-holepairs.

简介：Tunnelingdynamicsofmulti-atomicmoleculesbetweenanytwomulti-atomicmolecularBose-EinsteincondensateswithFeshbachresonanceisinvestigated.ItisindicatedthatthetunnelinginthetwoBose-Einsteincondensatesdependsnotonlyontheinter-molecularnonlinearinteractionsandtheinitialnumberofmoleculeinthesecondensates,butalsoonthetunnelingcouplingbetweenthem.Itisdiscoveredthatbesidesoscillatingtunnelingcurrentbetweenthemulti-atomicmolecularcondensates,thenonlinearmulti-atomicmoleculartunnelingdynamicssustainsaself-lockedpopulationimbalance:amacroscopicquantumself-trappingeffect.Theinfluenceofde-coherencecausedbynon-condensatemoleculeonthetunnelingdynamicsisstudied.Itisshownthatde-coherencesuppressesthemulti-atomicmoleculartunneling.

简介：Thispaperexaminesacomputerprogramdevelopedtoanalyzethevibrationofrotatingmachineriesbasedontheoriesofvibrationandmultibodydynamics(MBD).Bendingvibrationproblemsofrotatingmachinerieshavegenerallybeencategorizedaseitherlinearornonlinear.LinearproblemscanbeformulatedbystandardmethodsandnonlinearproblemscanbeformulatedbyMBDmethods.Inourstudy,nonlinearproblemsaretreatedbytheuseofageneral-purposecomputerprogram,RecurDyn(RD).Intheprogramwedeveloped,rotorbendingvibrationanalysis(RotB)structuralpropertiessuchasshafts,rotatingrotarydisks,unbalancedmassesandfoundationstructuresaremodeledasmultibodyelements.Also,nonlinearitiessuchascontact,non-symmetricalshafteffects,bearingcharacteristics,nonlinearrestoringanddampingcharacteristicsinthebearingsaretakenintoaccount.ThecomputationalresultsdemonstratethevalidityofRotB.

简介：Theadsorptiondynamicsforphenolinaqueoussolutionoftheadsorbentbasedonpolystyrenewasstudied.InordertodistinguishwiththeBoydquasi-homogeneousmodeloftheinnerstructureofion-exchanger,theparticlediffusionmodelincludingsurfacediffustionmodelandporediffusionmodelwassuggestedwhichissuitabletothemacroporousadsorbent.Thediffusiondeterminationstepoftheadsorptionpocesswasestablishedandtheeffectivediffusioncoefficientwasalsodetermined.Theinfluenceofsurfacediffusionandporedifusionontheparticlediffusionratewasinvestigatedqualitatively.Allofthesewereveryimportanttoimprovethestructureofthemacroporousadsorbentinordertoimprovethemass-transferrate.

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简介：Nanowireshaveattractedmoreandmoreinterestinrecentyearsduetotheiruniquepropertiescomparedtobulkmaterials[1].Thequitedifferentpropertiespossessedbynanowiresaremainlycausedbytheirhighsurface-tovolumeratio[2].Behaviorsofnanowiresunderirradiationconditionshavealsoattractedintensiveattentionintheseyears[3??5].Ithasbeenproposedthatnanowiresmayberadiationresistancebecausetheirlargesurface-to-volumeratio,andmeanwhilethesurfacearetheperfectsinksfordefectscreatedintheradiationprocess[3].

简介：Amathematicalmodelofapredator-preymodelwithIvlev'sfunctionalresponseconcerningintegratedpestmanagement(IPM)isproposedandanalyzed.Weshowthatthereexistsastablepest-eradicationperiodicsolutionwhentheimpulsiveperiodislessthansomecriticalvalues,Furthermore,theconditionsforthepermanenceofthesystemaregiverl.Byusingbifurcationtheory,weshowtheexistenceandstabilityofapositiveperiodicsolution.Theseresultsarequitedifferentfromthoseofthecorrespondingsystemwithoutimpulses.Numericalsimulationshowsthatthesystemweconsiderhasmorecomplexdynamicalbehaviors.Finally,itisprovedthatIPMstrageyismoreeffectivethantheclassicalone.

简介：Athoroughunderstandingonthemechanicalpropertiesofcarbonnanotube(CNT)isessentialinextendingtheadvancedapplicationsofCNTbasedsystems.However,conductingexperimentstoestimatemechanicalpropertiesatthisscaleisextremelychallenging.Therefore,developmentofmechanisticmodelstoestimatethemechanicalpropertiesofCNTsalongwiththeintegrationofexistingcontinuummechanicsconceptsiscriticallyimportant.ThispaperpresentsacomprehensivemoleculardynamicssimulationstudyonthesizedependencyandpotentialfunctioninfluenceofmechanicalpropertiesofCNT.Commonlyusedreactivebondorder(REBO)andadaptiveintermolecularreactivebondorder(AIREBO)potentialfunctionswereconsideredinthisregard.Young'smodulusandshearmodulusofCNTsarederivedbyintegratingclassicalcontinuummechanicsconceptswithmoleculardynamicssimulations.TheresultsindicatethatthepotentialfunctionhasasignificantinfluenceontheestimatedmechanicalpropertiesofCNTs,andtheinfluenceofpotentialfieldismuchhigherwhenstudyingthetorsionalbehaviourofCNTsthanthetensilebehaviour.

简介：在一系列分子动力学计算中，（ＫＩ）１０８离子簇冷却时自发地由液相变为立方面心相．在３５０Ｋ和４００Ｋ的成核速率大于１０３６核／ｍ３·ｓ．由成核速率得到的固－液界面自由能约为５０ｍＪ／ｍ２．