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简介：Tobettersimulatemulti-phaseinteractionsinvolvingfailureevolution,thematerialpointmethod(MPM)hasevolvedforalmosttwentyyears.Recently,aparticle-basedmultiscalesimulationprocedureisbeingdeveloped,withintheframeworkoftheMPM,todescribethedetonationprocessofenergeticnano-compositesfrommoleculartocontinuumlevelsothatamultiscaleequationofstatecouldbeformulated.Inthisletter,amultiscaleMPMisproposedviabothhierarchicalandconcurrentschemestosimulatetheimpactresponsebetweentwomicrorodswithdifferentnanostructures.Preliminaryresultsarepresentedtoillustratethatatransitionregionisnotrequiredbetweendifferentspatialscaleswiththeproposedapproach.

简介：Aconcurrentmultiscalemethodisdevelopedforsimulatingquasi-staticcrackpropagationinwhichthefailureprocessesoccurinonlyasmallportionofthestructure.Forthispurpose,amultiscalemodelisadoptedandbothscalesarediscretizedwithfinite-elementmeshes.Theextendedfiniteelementmethodisemployedtotakeintoaccountthepropagationofdiscontinuitiesonthefine-scalesubregions.Atthesametime,fortheothersubregions,thecoarse-scalemeshisemployedandisresolvedbyusingtheextendedmultiscalefiniteelementmethod.Severalrepresentativenumericalexamplesaregiventoverifythevalidityofthemethod.

简介：Thepotentialsofmulti-scaledesignthatcombinesbothnanoscaleandmicroscalemechanismsforbiocatalysisinvolvingmultipleenzymesandcofactor(s)areexamined.Performanceofthesecomplexsystemsdependsonproperinteractionsamongtheenzymesandcofactor(s).Inthiswork,nanoparticle-basedmultipleenzymesandtetheredcofactoraredesignedtostimulatesuchinteractions.Furthermore,thenanostructuresareencapsulatedinmicrocapsuleswithmembranespossessingporesthatarecomparabletothesizeofnanoparticles.Whilethenanoparticlesarethe'motor'driving.thecomplexreactionsinsidethecapsules,thenano-sizedporesofthemicrospheresallowefficientmoleculardiffusionforrapidreactantsupplyandproductremoval.Themicrocapsulescanthenbeusedinformofpackedbedorsuspensionreactorsforlarge-scaleindustrialoperations.Themulti-leveldesignprovidesthemechanismformatchingreactionandmasstransferrates,andforoptimizingthevolumetricproductivity.Thisstudyshowcasesaninterestingconceptwhichentailsinteractionsamongnanostructuredmultipleenzymesandcofactor,theintegrationofcomplexnano-scalecatalyticstructuresintomicro-scaleandthenindustrialprocess-scalesystemsforlong-termcontinuousoperations.

简介：Clinicaldisordersoftenarecharacterizedbyabreakdownindynamicalprocessesthatcontributetothecontrolofuprightstanding.Disruptiontoalargenumberofphysiologicalprocessesoperatingatdifferenttimescalescanleadtoalterationsinposturalcenterofpressure(CoP)fluctuations.Multiscaleentropy(MSE)hasbeenusedtoidentifydifferencesinfluctuationsofposturalCoPtimeseriesbetweengroupswithandwithoutknownphysiologicalimpairmentsatmultipletimescales.Thepurposeofthispaperisto:1)reviewbasicelementsandcurrentdevelopmentsinentropytechniquesusedtoassessphysiologicalcomplexity;and2)identifyhowMSEcanprovideinsightsintothecomplexityofphysiologicalsystemsoperatingatmultipletimescalesthatunderliethecontrolofposture.WereviewandsynthesizeevidencefromtheliteratureprovidingsupportforMSEasavaluabletooltoevaluatethebreakdowninthephysiologicalprocessesthataccompanychangesduetoaginganddiseaseinposturalcontrol.ThisevidenceemergesfromobservedlowerMSEvaluesinindividualswithmultiplesclerosis,idiopathicscoliosis,andinolderindividualswithsensoryimpairments.Finally,wesuggestsomefutureapplicationsofMSEthatwillallowforfurtherinsightintohowphysiologicaldeficitsimpactthecomplexityofposturalfluctuations;thisinformationmayimprovethedevelopmentandevaluationofnewtherapeuticinterventions.

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简介：多尺度的策略在基于波形的速度倒置的成功的申请是很重要的。策略顺序preceeds从长当模特儿突然速度可伸缩，很好在完整的波形倒置(FWI)被开发了解决本地mininum问题。相反，它的不好在图象域波形断层摄影术(IWT)理解，哪个幕後放映的影像普通图象的支离破碎的波形部件聚在一起进速度更改。IWT对本地最小的问题不太敏感，但是趋于与低分辨率造长规模的模型。以便由IWT造长规模、短规模的模型，我们讨论在图象域限制的几多尺度的策略。策略包括模型reparameterization，客观功能切换和重新可伸缩的坡度。Marmsousi模型和真实数据上的数字测试证明我们的建议多尺度的IWT在有宽wavenumber光谱的buidling速度模型是有效的。

简介：Thesimulationofnanoindentationintosinglenickelcrystalisperformedbyusingquasicontinuummethod.Thestrainenergy-displacementandload-displacementcurvesarepresentedtostudythemechanicalbehaviorofthedislocationnucleation.Thecharacteristicsofthestackingfaultanddislocationnucleationaredeterminedbycalculatingthecentro-symmetryparametersandanalyzingthedisplacementfieldoftheatomsbeneaththeindenter.Thestructureofthestackingfaultandthecharacteristicsofdislocationobtainedinthesimulationbyquasicontinuummethodarereproducedinthesimulationbymoleculardynamics.

简介：AbstractInthispaperwestudysomenonoverlappingdomaindecompositionmethodsforsolvingaclassofellipticproblemsarisingfromcompositematerialsandflowsinporousmediawhichcontainmanyspatialscales.Ourpreconditionerdiffersfromtraditionaldomaindecompositionpreconditionersbyusingacoarsesolverwhichisadaptivetosmallscaleheterogeneousfeatures.Whiletheconvergencerateoftraditionaldomaindecompositionalgorithmsusingcoarsesolversbasedonlinearorpolynomialinterpolationsmaydeteriorateinthepresenceofrapidsmallscaleoscillationsorhighaspectratios,ourpreconditionerisapplicabletomultiple-scaleproblemswithoutrestrictiveassumptionsandseemstohaveaconvergenceratenearlyindependentoftheaspectratiowithinthesubstructures.ArigorousconvergenceanalysisbasedontheSchwarzframeworkiscarriedout,andwedemonstratetheefficiencyandrobustnessoftheproposedpreconditionerthroughnumericalexperimentswhichincludeproblemswithmultipl

简介：仅仅二个宏观的参数被需要描述线性有弹性的固体的机械性质，即泊松的比率和幼仔是模量。相应地，应该有二个显微镜的参数如果线性有弹性的固体的宏观的机械性质从显微镜的水平被导出，决定材料的机械性质。由这个想法照亮了，为材料的一个多尺度的机械模型，虚拟multi-dimensionalinternal契约(VMIB)模型，被把一张shear契约合并到虚拟内部契约(VIB)建议模型。由这修正，VMIB模型联系宏有分离结构和相应关系在之间的显微镜的机械性质的材料的机械性质微并且宏参数被导出。精力密度功能的张肌质量，包含并列向量，算术地被证明。从观点ofVMIB，材料的宏观的非线性的行为能被归因于强加的变丑导致的虚拟契约分发密度的进化。与这个理论假设，作为一个申请例子，易碎的材料的单轴的压缩失败被模仿。在试验性的结果和模仿的之间的好同意被发现。

简介：Anewrnultiscaleedgedetectionmethodispresented,whichisbasedonaneffectiveedgemeasure.Theeffectiveedgemeasure,usedtoadaptivelyadjustthescalesofwavelettransform,isdefinedusingthenovelfeaturesofimageedgeobtainedfromhumanbeingvisioncharacteristics.Finally,twoexperimentsshowthattheproposedalgorithmappearstoworkwell.

简介：Inthispaper,wewilldiscusstheasymptoticbehaviourforaclassofhyperbolic-parabolictypeequationwithhighlyoscillatorycoefficientsarisingfromthestrong-transientheatandmasstransferproblemsofcompositemedia.Acompletemultiscaleasymptoticexpansionanditsrigorousverificationwillbereported.

简介：在这份报纸，我们调查异构的多尺度的方法(唔)为有分布式的控制的最佳的控制问题，限制与高度摆动的系数由椭圆形的方程管理了。州的可变、有肋骨的变量被依靠联合的宏和微有限元素的多尺度的discretization计划接近，而控制变量是由piecewise常数的discretized。由把著名狮子词根用于discretized最佳的控制问题，我们获得必要、足够的optimality条件。在L2和H1标准的Apriori错误估计为状态被导出，有肋骨并且有制服的控制变量绑了常数。最后，数字例子被举说明我们的理论结果。

简介：Multiscalesimulationsofthetiltedflat-endednanoindentationwithdifferenttiltedangles(from5?～30?)onthe(-110)surfaceofnickelcrystalwerestudiedusingtheQCmethod.Themodeloftheindentationisaflat-endindenterinclinedbyanangleεdrivenintoahalfplanevertically.Load-displacementresponses,initialstagesoftheplasticitydeformationsanddislocationemissionsfornickelfilmatdifferentinclinedangleswereobtainedandanalyzedaswell.Anenergycriterionwassuccessfullyproposedtoanalyzethecriticalloadforthefirstdislocationemissionbeneaththeedgeoftheindenter.Simulationresultsagreewellwithanalyticalones.AnelasticmodelbasedonthecontacttheoryandthePeierls-Nabarrodislocationmodelwerecombinedtoanalyzewhenandwherethedislocationwillbeemittedbeneaththelowersurfaceofaninclinedindenter.Resultsindicatethatthekeyparameteristheratioofthecontacthalfwidthtothepositionoftheslipplane.Thisparametershowstherangeinwhichadislocationwillprobablybeemitted.Thismechanismexplainsthesimulationresultswell.ThisworkisofvalueforunderstandingthemechanismofdislocationemissionsofFCCcrystalsundertiltedflatendednanoindentationwhileprovidingapproachestopredictingwhenthefirstdislocationwillbeemittedandwheresubsequentdislocationswillprobablybeemitted.

简介：在现在的工作，一个计算框架为多尺度的建模和稳固的燃料的分析被建立。一个收拾行李的算法，作为范围或磁盘认为铵高氯酸盐(AP)和铝(艾尔)是粒子被开发匹配尺寸分发和稳固的燃料的卷部分。一个homogenization理论被采用计算一个代表性的体积元素(RVE)的吝啬的压力和紧张。用吝啬的结果，RVE的一种合适的尺寸被决定。没有考虑在粒子和矩阵之间的接口，燃料的松驰的几数字模拟被执行。松驰效果和依赖于应用负担的燃料的非线性的机械行为被讨论。新技术说出基于表面的连贯的行为的A被建议描述由二成分组成的粒子dewetting的现象：一个损坏开始标准和一条损坏进化法律。就接触损坏行为而言的几个例子被计算，损坏接口引起的也非线性的行为在这份报纸被讨论。而且，损坏接口上的批评接触压力，起始的接触僵硬和接触失败距离的效果当模特儿被学习了。

简介：AssimilatingsatelliteradiancesintoNumericalWeatherPrediction(NWP)modelshasbecomeanimportantapproachtoincreasetheaccuracyofnumericalweatherforecasting.Inthisstudy,theassimilationtechniqueschemewasemployedinNOAA’sSTMAS(Space-TimeMultiscaleAnalysisSystem)toassimilateAMSU-Aradiancesdata.Channelselectionsensitivityexperimentswereconductedonassimilatedsatellitedatainthefirstplace.Then,realcaseanalysisofAMSU-Adataassimilationwasperformed.Theanalysisresultsshowedthat,followingassimilatingofAMSU-Achannels5-11inSTMAS,theobjectivefunctionquicklyconverged,andthechannelverticalresponsewasconsistentwiththeAMSU-Aweightingfunctiondistribution,whichsuggeststhatthechannelscanbeusedintheassimilationofsatellitedatainSTMAS.WiththecaseoftheTyphoonMorakotinTaiwanIslandinAugust2009asanexample,experimentsonassimilatedandunassimilatedAMSU-AradiancesdataweredesignedtoanalyzetheimpactoftheassimilationofsatellitedataonSTMAS.TheresultsdemonstratedthatassimilationofAMSU-Adataprovidedmoreaccuratepredictionoftheprecipitationregionandintensity,andespecially,itimprovedthe0-6hprecipitationforecastsignificantly.