简介：Optimizationofcompositionandmicrostructureisimportanttoenhanceperformanceofsolidoxidefuelcells(SOFC)andlithium-ionbatteries(LIB).Forthis,theporouselectrodestructuresofbothSOFCandLIBaremodeledasabinarymixtureofelectronicandionicconductingparticlestoestimateefectivetransportproperties.Particlepackingsof10000spherical,binarysizedandrandomlypositionedparticlesarecreatednumericallyanddensifiedconsideringthediferentmanufacturingprocessesinSOFCandLIB:thesinteringofSOFCelectrodesisapproximatedgeometrically,whereasthecalenderingprocessandvolumechangeduetointercalationinLIBaremodeledphysicallybyadiscreteelementapproach.Acombinationofatrackingalgorithmandaresistornetworkapproachisdevelopedtopredicttheconnectivityandefectiveconductivityforthevariousdensifiedstructures.ForSOFC,asystematicstudyoftheinfluenceofmorphologyonconnectivityandconductivityisperformedonalargenumberofassemblieswithdiferentcompositionsandparticlesizeratiosbetween1and10.Incomparisontopercolationtheory,anenlargedpercolationareaisfound,especiallyforlargesizeratios.Itisshownthatincontrasttoformerstudiesthepercolationthresholdcorrelatestovaryingcoordinationnumbers.Theefectiveconductivityshowsnotonlyanincreasewithvolumefractionasexpectedbutalsowithsizeratio.ForLIB,ageneralincreaseofconductivityduringtheintercalationprocesswasobservedincorrelationwithincreasingcontactforces.Thepositiveinfluenceofcalenderingonthepercolationthresholdandtheefectiveconductivityofcarbonblackisshown.Theanisotropycausedbythecalenderingprocessdoesnotinfluencethecarbonblackphase.

简介：Consideringtheefectsofosmoticpressure,elasticbending,Maxwellpressure,surfacetension,aswellasfexo-electricanddielectricpropertiesofphospholipidmembrane,theshapeequationforspherevesicleinalternation(AC)electricfeldisderivedbasedontheliquidcrystalmodelbyminimizingthefreeenergyduetocoupledmechanicalandACelectricalfelds.Besidestheefectofelasticbending,theinfuenceofosmoticpressureandsurfacetensiononthefrequencydependentbehaviorofvesiclemembraneinACelectricfeldisalsodiscussed.Ourtheoreticalresultsformembranedeformationareconsistentwithcorrespondingexperiments.Thepresentmodelprovidesthepossibilitytofurtherdisclosethefrequency-dependedbehaviorofbiologicalcellsinthecoupledACelectricanddiferentmechanicalfelds.

简介：Cementationisproducedbymixingacertainamountofcementwiththesaturatedclay.Thepurposeofthispaperistomodelthecementationeffectonthemechanicalbehaviorofcement-treatedclay.Amicromechanicalstress-strainmodelisdevelopedconsideringexplicitlythecementationatinter-clustercontacts.Theinter-clusterbondinganddebondingduringmechanicalloadingareintroducedintwoways:anadditionalcohesionintheshearslidingandahigheryieldstressinnormalcompression.Themodelisusedtosimulateisotropiccompressionandundrainedtriaxialtestsundervariousconfiningstressesoncement-treatedSingaporeclaywithvariouscementcontents.Theapplicabilityofthepresentmodelisevaluatedthroughcomparisonsbetweennumericalandexperimentalresults.Theevolutionoflocalstressesandlocalstrainsininter-clusterplanesisdiscussedinordertoexplaintheinducedanisotropyduetodebondingatcontactlevelundertheappliedloads.

简介：Liquidsolid使流体化床在处理工业基于粒子尺寸，密度，和形状分开粒子的矿物质被使用。理解扩展的使流体化的床为精确地估计它的表演是重要的。使流体化的床的扩大特征被与铁矿石，铬铁矿，石英，和煤样品执行几个实验学习。把水用作液体媒介，实验被进行在使流体化的床上学习粒子尺寸，粒子密度，和表面的速度的效果扩大。试验性的数据被利用基于维的分析开发一个实验数学模型以粒子特征估计使流体化的床的扩大比率，操作并且设计参数。从数学模型获得的预言的扩大比率在对试验性的数据的好同意。

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简介：Stent-graftimplantationisanimportantmeansofclinicaltreatmentforaorticdissectinganeurysm(ADA).However,researchesonfluiddynamicseffectsofstentwererare.ComputersimulationwasusedtoinvestigatetheinteractionsbetweenbloodstreamandvascularstructureinastentedADA,whichendurestheperiodicpulsevelocityandpressure.Weobtainedandanalyzedtheflowvelocitydistribution,thewalldisplacementandwallstressintheADA.Bycomparingthedifferentresultsbetweenanon-stentedandastentedADA,wefoundthattheinsertionofavasculargraftcanmakethelocationofmaximumstressanddisplacementmovefromtheaneurysmlumenwalltothearterywall,accompaniedwithagreatlydecreaseinvalue.Theseresultsimplythattheplacementofastent-graftofanykindtooc-cludeADAwillresultinadecreasedchanceofrupture.

简介：Analternateyetgeneralformoftheclassicaleffectivethermalconductivitymodel(Maxwellmodel)fortwo-phaseporousmaterialsispresented,servinganexplicitthermo-physicalbasis.Itisdemonstratedthatthereducedeffectivethermalconductivityoftheporousmediaduetonon-conductingporeinclusionsiscausedbythemechanismofthermalstretching,whichisacombinationofreducedeffectiveheatflowareaandelongatedheattransferdistance(thermaltortuosity).