简介:Inthisarticle,wemainlydiscusstheasymptoticbehaviorformulti-dimensionalcontinuous-timerandomwalkinrandomenvironmentwithholdingtimes.Byconstructingarenewalstructureandusingthepoint'environmentviewedfromtheparticle',underGeneralKalikow'sCondition,weshowthelawoflargenumbers(LLN)andcentrallimittheorem(CLT)fortheescapespeedofrandomwalk.
简介:ThepaperdealswiththestronglydampednonlinearwaveequationofKirchhofftype.Theexistenceofaglobalattractorisprovenbyusingthedecomposition,andmoreover,thestructureoftheglobalattractorisestablished.Ourresultsimprovethepreviousresults.
简介:Inthisarticle,theauthorsdiscussedtheboundarybehaviorfortheCauchy-typeintegralswithvaluesinaCliffordalgebra,obtainedsomeSochocki–PlemeljformulaeandPrivalov–MuskhelishvilitheoremsfortheCauchy-typeintegraltakenoverasmoothsurfacebyrathersimplemethod.
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简介:DynamicbehaviorofsinglepileembeddedintransverselyisotropiclayeredmediaisinvestigatedusingthefiniteelementmethodcombinedwithdynamicstiffnessmatricesofthesoilderivedfromGreen’sfunctionforringloads.Theinfluenceofsoilanisotropyonthedynamicbehaviorofpilesisexaminedthroughaseriesofparametricstudies.
简介:TheauthorsstudytheasymptoticbehaviorofthesmoothsolutionstotheCauchyproblemsfortwomacroscopicmodels(hydrodynamicanddrift-diffusionmodels)forsemiconductorsandtherelatedrelaxationlimitproblem.First,itisprovedthatthesolutionstothesetwosystemsconvergetotheuniquestationarysolutiontimeasymptoticallywithoutthesmallnessassumptionondopingprofile.Then,verysharpestimatesonthesmoothsolutions,independentoftherelaxationtime,areobtainedandusedtoestablishthezerorelaxationlimit.
简介:Theelasticbehaviorofsaturatedporousmaterialsunderundrainedfreezingisinvestigatedbyusingaporomechanicalapproach.Thermodynamicequilibriaareusedtodescribethecrystallizationprocessofthepartiallyfrozensolutioninbulkstateandconfinedstateinpores.Byphasetransitionatfreezing,fusionenergy,thermalcontractionofsolid,solutionandicecrystals,volumechangesofcrystallizationbuildupremarkableporepressurethatinducesexpansionorshrinkageofsolidmatrix.Owingtothelowerchemicalpotentialwhenporewatermixeswithsalts,fewericeformsinpores.Penetrationoficeintotheporousmaterialsincreasesthecapillarypressure,butlimitse?ectontheporeliquidpressureandthestrainofsolidmatrix.Onthecontrary,theporepressureinducedbysolutiondensityrisesassaltconcentrationincreasesandcausessignificantshrinkageofsolidmatrix.
简介:许多尝试被做了为学习微粒媒介的行为为不同参数和某些组成的模型发现各种各样的关系。所有这些模型基于连续媒介的概念。用象分离元素方法那样的一个数字方法,一个人能弄明白什么正在发生通过一玷污粒子的不连续的媒介在介绍shear力量和变丑特征起主要作用。有易碎的粒子的媒介的行为与非易碎的粒子在这份报纸并且与集会的相比被学习。在这份报纸,夸张有弹性的模型被调查因为多角形的集会在二个不同测试系列塑造了粒子。另外,象卷紧张,磨擦的角度,膨胀性的角度和有弹性的模量那样的汇编的不同的宏参数的进化为非易碎、易碎的土壤粒子两个都在模拟测试期间被学习。在结束,参量的研究在集会行为上在粒子破裂的力量的效果上被执行。
简介:Photoisomerization(trans-cis)ofazoaromaticcompoundshasbeeninvestigatedextensivelyusingabsorptionspectroscopysince1950s[1].Byirradiationwithlightofwavelengthλ1orλ2,thegeometricconfigurationoftheazobondinazobenzenebasedcompoundscanbereversiblyswitchedfromtranstocis.Thetwostateshavedistinctabsorptionspectra.Thisfeaturewouldallowreversiblestorageofdataonthebasisofcisandtransstateswiththeaidofλ1andλ2.However,thecisstateisthermodynamicallyunstablewithrespecttothetransstate,thereforeathermalrelaxationprocessoccursinthedark(atroomtemperature).Thisthermalback-reactionstronglylimitsthelifetimeofthecisstate,anditisinfluencedbythesubstituentR1andR2,catalysts,temperature,andenvironment(solventpolarity,typeofpolymermatrix)[2].
简介:Thethermalprotectionmaterialsandstructuresarewidelyusedinhypersonicvehiclesforthepurposeofthermalinsulation,andtheirmechanicalbehaviorisoneofthekeyissuesindesignandmanufactureofhypersonicvehicles.ItisourgreatpleasuretopresentthesevenpapersinthisspecialsubjectofTheoretical&AppliedMechanicsLetters(TAML)andintroducethe
简介:InthisarticlewestudyholomorphicisometriesofthePoincar'ediskintoboundedsymmetricdomains.EarlierwesolvedtheproblemofanalyticcontinuationofgermsofholomorphicmapsbetweenboundeddomainswhichareisometriesuptonormalizingconstantswithrespecttotheBergmanmetric,showinginparticularthatthegraphV0ofanygermofholomorphicisometryofthePoincar'ediskΔintoanirreducibleboundedsymmetricdomainΩ€CNinitsHarish-Chandrarealizationmustextendtoanaffine-algebraicsubvarietyVC×CN=CN+1,andthattheirreduciblecomponentofV∩(Δ×Ω)containingV0isthegraphofaproperholomorphicisometricembeddingF:Δ→Ω.Inthisarticlewestudyholomorphicisometricembeddingswhichareasymptoticallygeodesicatageneralboundarypointb∈Δ.Startingwiththestructuralequationforholomor-phicisometriesarisingfromtheGaussequation,weobtainbycovariantdifferentiationanidentityrelatingcertainholomorphicbisectionalcurvaturestotheboundarybehaviorofthesecondfundamentalformσoftheholomorphicisometricembedding.Usingthenonpositivityofholomorphicbisectionalcurvaturesonaboundedsymmetricdomain,weprovethatσmustvanishatageneralboundarypointeithertotheorder1ortotheorder21,calledaholomorphicisometryofthefirstresp.secondkind.Wedealwithspecialcasesofnon-standardholomorphicisometricembeddingsofsuchmaps,showingthattheymustbeasymptoticallytotallygeodesicatageneralboundarypointandinfactofthefirstkindwheneverthetargetdomainisaCartesianproductofcomplexunitballs.WealsostudytheboundarybehaviorofanexampleofholomorphicisometricembeddingfromthePoincar'ediskintoaSiegelupperhalf-planebyanexplicitdeterminationoftheboundarybehaviorofholomorphicsectionalcurvaturesinthedirectionstangenttotheembeddedPoincar'edisk,showingthatthemapisindeedasymptoticallytotallygeodesicatageneralboundarypointandofthefirstkind.Fo
简介:Thesurfaceofpolypropylene(PP)membranewasmodifiedbylowtemperatureplasmawithammonia.Theeffectofexposuretimewasinvestigatedbymeansofcontactanglemeasurement.Theresultsshowthatlowtemperatureammoniaplcsmatreatmentcanenhanceitshydrophilicity.Chinesehamsterovary(CHO)cellsattachmentonthemodifiedmembranewasenhancedandthegrowthrateonthemembranewasfasterthanunmodifiedone.
简介:Thisstudyconcernsatwo-dimensionalmodelandthecorrespondingvirtualcrackclosuretechnique(VCCT)implementedtosolvethegeneralboundaryvalueproblemsthatmayexplainwhyinterfacediscontinuityhaseffectsonthefracturebehaviorinthesuperconductor-substratesystem.Theinterfacialdiscontinuitycanbeclassifiedaccordingtothematerialproperties'continuityandtheirderivatives'continuityattheinterface.Fornonhomogeneoussuperconductorandsubstratespecimenswithvariousmaterialproperties,aVCCTmethodisdevelopedtocalculatetheirfracturebehavior.Furthermore,theeffectsofappliedmagneticfieldamplitudeandnonhomogeneousparametersareextensivelyandparametricallystudiedintwoactivationprocesses(zero-fieldcoolingandfieldcooling).Theintegrativeandcomputationalstudypresentedhereprovideafundamentalmechanisticunderstandingofthefracturemechanisminthesuperconductor-substratesystemandshedslightontherationaldesignofinterfacialcontinuity.