简介：

简介：

简介：在这份报纸，我们在场supercooled上的大小浇的深无弹性的中子散布的结果(吵闹)在毛孔以内限制了(平均毛孔直径~20)经由大音阶的第五音胶化方法通过alkoxide先锋Tetra-Methyl-Ortho硅酸盐的水解作用和polycondensation获得的一个混乱吸水的硅石矩阵。实验在二温度被执行(250K和210K，即在supercooled的通常认为的liquidliquid转变限制了水前后)在有hydrationh~40%w/w的一件湿样品上，它足够高有充满水的毛孔但是对足够低避免水结晶化。7%也是的几乎干燥的样品ath~调查了测量硅石矩阵的贡献到散布信号的中子。这是众所周知的，吵闹大小在系统允许吝啬的动能的决心和氢原子的动量分发因此，允许研究人员探查supercooled的本地结构限制的水。获得的主要结果是在210K，氢平均数动能比在250K稍微高相等或平。这与最近建议在水里描述氢的动能的温度依赖的一个semiempirical泛音模型的预言是不一致的。这是新、很有趣的结果，它建议在210K，水氢比在250K经历一个更生硬的分子间的潜力。这与liquidliquid转变假设一致。

简介：这份报纸在陶艺和脱臼包括阶段转变为无弹性的材料行为的纹理粗糙的原子论的模拟论述新方法论在金属的调停的粘性。方法论联合平衡方程和一个修改有限元素方法的原子论的明确的表达。与显著地自由的更少度比那些一个充分原子论的模型并且没有另外的组成的规则但是interatomic力量地，新纹理粗糙(CG)方法被显示在预言材料的非线性的组成的回答并且也复制象阶段转变那样的原子规模的现象可行(在硅和脱臼成核和移植，脱臼环的形成和在单个水晶的叠的差错带子的钻石-Sn)镍。指导在CG和现在的方法论在没有失去必要原子论的特征，当模特儿和无弹性的材料行为的模拟有效、有希望的相应完整的分子的动力学(MD)模拟表演之间的比较。潜在的应用和CG方法的限制也被讨论。

简介：Inthisstudytheseismicpoundingresponseofadjacentmulti-degree-of-freedom(MDOF)buildingswithbilinearinter-storyresistancecharacteristicsisinvestigatedthroughdimensionalanalysis.Theapplicationofdimensionalanalysisleadstoacondensedpresentationoftheresponse,andtheremarkableself-similaritypropertyforbilinearMDOFbuildingswithinelasticcollisionisuncovered.Itisshownthatwhentheresponseisexpressedintheappropriatedimensionlessform,responsespectraforanyintensityoftheexcitationcollapsetoasinglemastercurve.ThereducedΠsetexplicitlydescribestheinteractionbetweenthecollidingstructures.TheeffectofpoundingontheMDOFbuilding’sresponseisillustratedusingthreewell-dividedspectralregions(amplified,de-amplifiedandunaffectedregions).Parametricstudiesareconductedtoinvestigatetheeffectsofthestorystiffnessofstructures,thestorystiffnessratioandmassratioofadjacentbuildings,thestructuralinelasticcharacteristicsandthegapsizevalues.Resultsshowthat(i)theinfluenceofsystemstiffnessratiotothelighterandmoreflexiblebuildingismoresignificantinthefirstspectralregion,wherethemaximumresponseofthebuildingisamplifiedbecauseofpounding;and(ii)thevelocityandpoundingforceoftheheavierandstifferbuildingisunexpectedlysensitivetothemassratioofadjacentbuildings.

简介：Inordertostrictlysolvetheproblemofpersistentcurrentinone-dimensionalmesoscopicmetalrings,amodelwithaperfectringcoupledtoanexternalreservoirbyafour-leadjunctionisintroducedtoindependentlydescribeinelasticacattering.Thejunctionisexpressedbya4×4S-matrix,whichisverysimilartothatusedbyBüttikerinsequentialtunnelling.SincetheS-matrixisunitary,thecurrentconservationkeepsantomatically,Sincethequadrupletofthematrixproblemcanbereducedintotwotopologicallyseparatedoublets,itgivesasimpleandelegantmethodcomparedwiththeformerdescriptionwitha3×3matrix.

简介：Theinelasticseismicresponsesofshear-typemultistoreybuildingswithregularasymmetrywereanalyzed.Theeffectsofthefundamentallateralperiod,thefundamentalfrequencyratiooftranslationaltotorsional,theeccentricratio,earthquakeintensityandorthogonalearthquakeexcitationsoninelasticdisplacementandductilitywerestudiedrespectively.Numericalresultsshowthataforementionedfactorsinfluencetheseismicresponsesofthebuildings.Theeffectoftheorthogonalinputofgroundmotionislikelytoberestrictedtothemovingstatusofeccentricelements.

简介：Non-linearfiniteelementmodelsaccountingforlargedisplacementshavebeenusedtoinvestigatethebehaviorofsteelbuilt-upshearlinksthathadpreviouslybeentestedusinglarge-scaleexperiments.Thelinksweredesignedusingstcclgradeswithyieldpointsrangingfromhightolowstrengths.Theobjectivesofthcnumericalanalysesweretofurtherinvestigatethenon-linearbehaviorandtocorrelatethenumericalresultswithexperimentalobservations.Elasto-plasticaswellascyclicstress-strainmaterialpropertieswereincorporatedtostudytheinfluenceofmaterialbehaviorontheoverallshearlinkresponse.Non-linearmonotonicanalysesoftheshearlinksincorporatingthecyclicstress-strainsteelpropertiesresultedinsimilartrendsintheresponseasthebackbonecurvesrecordedfromthephysicalexperiments.Thenumericalmodelsofbuilt-upshearlinksutilizingstructuralgradesteelscloselycorrelatedtotheexperimentallyrecordedshearstrength.Modelsutilizinglowyieldpointsteelsoverestimatedtheshearstrength,whichwascausedbythecharacteristicsofcyclicbehaviorofthosesteels.Thedetailednumericalmodelsalsoallowedforinvestigationoftheplasticstraindemandsonthedifferentcomponentsofthelink.Itwasshownthatfiniteelementmodelscombinedwithappropriatestress-strainrelationshipmaybeusedwithconfidencetocheckthedesignofshearlinksofdifferentsteelgradesandsectionalgeometries.

简介：

简介：