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简介：这份报纸为不一致的自然沉积混合物的运输以中部的谷物尺寸和有效沉积尺寸评估代表性的沉积尺寸的适用性。来自Krasak河的自然沉积，Yogjakarta被使用。床样品从三不同的河节被收集，即在上游的(U)，中流(M)和下游的(D)。中部的直径，d50和沉积几何标准差，为节U，M和D的g是1.63公里，0.91公里和0.69公里，并且4.8，2.3和1.5分别地。特别注意对在阀值沉积运动上改变代表性的沉积尺寸的效果被给予，在四个阀值方程被采用的地方。当时，阀值价值变化g=4.8g=4.8并且与g<2.4g<2.4。分析用有或没有沉积运动的阀值标准说明两个的八个选择公式被扩大到水流带来的碎石运输的预言。到为床材料的不一致的报道，当时，在用d50的计算水流带来的碎石分泌物之间的比较与水流带来的碎石预言被做代表性的沉积直径被使用。当有效沉积尺寸为不一致的沉积混合物被采用时，统计分析的改进仅仅为预言被观察的分析表演计算了使用Brownlie(1981)和Camenen和Larson(2005)表情。采用有效沉积缩放de或d计算水流带来的碎石分泌物的他们未必确实改进水流带来的碎石预言，d50的使用被看作足够。

简介：丰富的山崩沉积物被Wenchuan地震触发，提供为在降雨条件下面的随后的碎片流动或斜坡失败的材料的富有的来源。山崩沉积物的物理、机械的性质的好理解对关于斜坡失败机制和碎片流动的开始的研究很重要。实验室biaxial压缩测试被用来在山崩存款，和一个分离元素方法(一个契约接触模型)的机械性质上学习材料作文和水内容影响被用来学习粒子僵硬，契约力量，磨擦系数和限制应力影响在数字、试验性的参数之间的机械行为和关系。试验性的结果证明山崩存款的失败压力与与增加的水内容增加好粒子并且也的内容被减少，特别在起始的增加阶段。浸透的山崩存款的结合被增加，但是磨擦角度随好粒子内容的增加被减少。砍力量参数(结合和磨擦角度)在起始的增加阶段与增加的水内容被减少，然后，他们慢慢地减少。有在5%-7%的水内容的批评的值(在重量)为失败强调并且砍山崩存款的力量参数。二次的方程被介绍描述在契约之间的关系力量和结合，和数字磨擦系数和试验性的磨擦角度。

简介：AnewapproachfortreatingthemeshwithLagrangianschemeoffinitevolumemethodispresented.IthasbeenprovedthatclassicalLagrangianmethodisdifficulttocopewithlargedeformationintrackingmaterialparticlesduetoseveredistortionofcells,andthechangingconnectivityofthemeshseemsespeciallyattractiveforsolvingsuchissues.Themeshwithlargedeformationbasedoncomputationalgeometryisoptimizedbyusingnewmethod.Thispaperdevelopsaprocessingsystemforarbitrarypolygonalunstructuredgrid,theintelligentvariablegridneighborhoodtechnologiesisutilizedtoimprovethequalityofmeshincalculationprocess,andarbitrarypolygonalmeshisusedintheLagrangianfinitevolumescheme.Theperformanceofthenewmethodisdemonstratedthroughseriesofnumericalexamples,andthesimulationcapabilityisefficientlypresentedincopingwiththesystemswithlargedeformations.

简介：WehavedevelopedaSi/grapheneoxideelectrodesynthesizedviaultrasonication-stirringmethodunderalkalinecondition.Scanningelectronmicroscopy(SEM),transmissionelectronmicroscope(TEM),EDSdot-mappingandhigh-resolutiontransmissionelectronmicroscopy(HRTEM)resultsshowthatSiparticlesareevenlydispersedonthegrapheneoxidesheets.Theelectrochemicalperformancewasinvestigatedbygalvanostaticcharge/dischargetestsatroomtemperature.TheresultsrevealedthatSi/grapheneoxideelectrodeexhibitedahighreversiblecapacityof2825mAh/gwithacoulombicefficiencyof94.6%at100mA/gafter15cyclesandacapacityretentionof70.8%after105cyclesat4000mA/g.Theseperformanceparametersshowagreatpotentialinthehigh-performancebatteriesapplicationforportableelectronics,electricvehiclesandrenewableenergystorage.

简介：Todealwiththestaircaseapproximationprobleminthestandardfinite-differencetime-domain(FDTD)simulation,thetwo-dimensionalboundaryconditionequations(BCE)methodisproposedinthispaper.IntheBCEmethod,thestandardFDTDalgorithmcanbeusedasusual,andthecurvedsurfaceistreatedbyaddingtheboundaryconditionequations.Thus,whilemaintainingthesimplicityandcomputationalefficiencyofthestandardFDTDalgorithm,theBCEmethodcansolvethestaircaseapproximationproblem.TheBCEmethodisvalidatedbyanalyzingnearfieldandfarfieldscatteringpropertiesofthePECanddielectriccylinders.TheresultsshowthattheBCEmethodcanmaintainasecond-orderaccuracybyeliminatingthestaircaseapproximationerrors.Moreover,theresultsoftheBCEmethodshowgoodaccuracyforcylinderscatteringcaseswithdifferentpermittivities.

简介：TheW-Cucompositesarewidelyusedasweld-ingelectrodes,electronicpackagingmaterials,electricdischargematerialsandheatsinksbecauseoftheexcellentproperties.Inthisresearch,theW-40wt.%Cucompositeswerepreparedthroughthevacuumhot-presssinteringmethod,andtheeffectofsinteringtemperatureonthemicrostructureand

简介：ThisArticlepresentsathreedimensionalnumericalmodelinvestigatingthermalperformanceandhydrodynamicsfeaturesoftheconfinedslotjetimpingementusingslurryofNanoEncapsulatedPhaseChangeMaterial(NEPCM)asacoolant.Theslurryiscomposedofwaterasabasefluidandn-octadecaneNEPCMparticleswithmeandiameterof100nmsuspendedinit.AsinglephasefluidapproachisemployedtomodeltheNEPCMslurry.ThethermophysicalpropertiesoftheNEPCMslurryarecomputedusingmodernapproachesbeingproposedrecentlyandgoverningequationsaresolvedwithacommercialFiniteVolumebasedcode.TheeffectsofjetReynoldsnumbervaryingfrom100to600andparticlevolumefractionrangingfrom0%to28%areconsidered.ThecomputedresultsarevalidatedbycomparingNusseltnumbervaluesatstagnationpointwiththepreviouslypublishedresultswithwaterasworkingfluid.ItwasfoundthataddingNEPCMtothebasefluidresultswithconsiderableamountofheattransferenhancement.ThehighestvaluesofheattransfercoefficientsareobservedatH/W=4andC_m=0.28.However,duetothehigherviscosityofslurrycomparedwiththebasefluid,theslurrycanproducedrasticincreaseinpressuredropofthesystemthatincreaseswithNEPCMparticleloadingandjetReynoldsnumber.

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简介：Athree-dimensionalfew-layerreducedgrapheneoxide-wrappedmesoporousLi4Ti5O12（m-LTO@FLRGO）electrodeisproducedusingasimplesolutionfabricationprocess.WhentestedasananodeforLiionbatteries,them-LTO@FL-RGOcompositeexhibitsexcellentratecapabilityandsuperiorcyclelife.Thecapacityofm-LTO@FL-RGOreaches165.4mAhg-1after100cyclesbetween1and2.5Vatarateof1C.Evenatarateof30C,ahighdischargecapacityof115.1mAhg-1isstillobtained,whichisthreetimeshigherthanthepristinemesoporousLi4Ti5O12（m-LTO）.Thegraphenenanosheetsareincorporatedintothem-LTOmicrosphereshomogenously,whichprovideahighconductivenetworkforelectrontransportation.