简介：介绍一种新型智能材料———形状记忆合金,包括其主要性能及应用,着重阐述NiTi形状记忆合金在医学领域的应用状况。

简介：Thispaperpresentsanewboundaryintegralequatiònfortwo-dimensionalelasticitywiththestresscomponentσijtitjasoneoftheboundaryvalues,wheretiisthedirectioncosineofthetangentontheboundary.ThisformofBEMhasanadvantageinthatthestresscomponentσijtitjontheboundarycanbecalculateddirectlyfromthenumericalsolution.Thepresentformulationforplaneproblemsusestwokernels,theoneislogarithmicallysingularandtheotheris1/rsingular.Theeffectivenessoftheapproachisalsodiscussedthroughtestexamples.

简介：Inmagneticresonanceelastography,oneseekstoreconstructtheshearmodulusfrommeasurementsofthedisplacementfieldinthewholebody.Inthispaper,wepresentanoptimizationapproachwhichsolvestheproblembysimplyminimizingadiscrepancyfunctional.Inordertorecoveracomplexanomalyinahomogenousmedium,wefirstobservethattheinformationcontainedinthewavefieldshouldbedecomposedintotwoparts,a'near-field'partintheregionaroundtheanomalyanda'far-field'partintheregionawayfromtheanomaly.Aswillbejustifiedboththeoreticallyandnumerically,separatingthesescalesprovidesalocalandprecisereconstruction.

简介：Thisletterreportstrafficflowsensitivitytovisco-elasticity,withthetrafficflowmodelingbrieflydescribedatfirstandthenusedtodotrafficflowsimulationswhoseresultscanreflectthepropertiesofspatial–temporalevolutionofringtrafficflow.Itrevealsthatvisco-elasticityplayscrucialroleinformationoftrafficflowpatterns,implyingthatself-organizationoftrafficflowiscrucialindeterminingtrafficflowstatus.

简介：Inthisarticle,byusingthestabilityofCauchytypeintegralwhenthesmoothperturbationforintegralcurveandtheSobolevtypeperturbationforkerneldensityhappen,wediscussthestabilityofthesecondfundamentalprobleminplaneelasticitywhenthesmoothperturbationfortheboundaryoftheelasticdomain(unitdisk)andtheSobolevtypeperturbationforthedisplacementhappen.Andtheerrorestimateofthedisplacementbetweenthesecondfundamentalproblemanditsperturbedproblemisobtained.

简介：Therelationsofallgeneralizedvariationalprinciplesinelasticityarestudiedbyemployingtheinvariancetheoremoffieldtheory.Theinfinitesimalscaletransformationinfieldtheorywasemployedtoinvestigatetheequivalenttheorem.Amongtheresultsfoundparticularlyinterestingarethoserelatedtothatallgeneralizedvariationalprinciplesinelasticityareequaltoeachother.Alsostudiedresultisthatonlytwovariablesareindependentinthefunctionalandthestress-strainrelationisthevariationalconstraintconditionforallgeneralizedvariationalprinciplesinelasticity.ThisworkhasprovenagaintheconclusionofProf.ChienWei-zang.

简介：<正>IntroductionThefundamentalproblemsofahalfplanewithanisotropicelasticityandtheperiodicfundamentalproblemsofahalfplanewithisotropicelasticitywererespectivelyinvestigatedbyS.G.Leknitskii[1]andLuChien-ke[2].Theseproblemsareformulatedonthecornplexz-planeintermsof

简介：Inthispaper,theauthorobtainsthemoregeneraldisplacementsolutionsfortheisotropicplaneelasticityproblems.Thegeneralsolutionobtainedinref.[1]ismerelytheparticularcaseofthispaper,Incomparisonwithref.[1],thegeneralsolutionsofthispapercontainmorearbitraryconstants.Thustheymaysatisfymoreboundaryconditions.

简介：TheStrohformalismismostelegantwhentheboundaryconditionsaresimple,namely,theyareprescribedintermsoftractionordisplacement.Formixedboundaryconditionssuchasthereforaslipperyboundary,theconcisematrixexpressionsoftheStrohformalismaredestroyed.WepresentageneralizedStrohformalismwhichisapplicabletoaclassofgeneralboundaryconditions.Thegeneralboundaryconditionsin-cludethesimpleandslipperyboundaryconditionsasspecialcases.ForGreen’sfunctionsforthehalfspace,thegeneralsolutionisapplicabletothecasewhenthesurfaceofthehalf-spaceisafixed,afree,aslippery,orothermoregeneralboundary.FortheGriffithcrackintheinfinitespace,thecrackcanbeaslit-likecrackwithfreesurfaces,arigidlineinclusion(whichissometimescalledananticrack),orarigidlinewithslipperysurfaceorwithothergeneralsurfaceconditions.ItisworthmentionthatthemodificationsrequiredontheStrohformalismareminor.Thegeneralizedformalismandthefinalsolutionslookverysimilartothoseofunmodifiedversion.Yettheresultsareapplicabletoaratherwiderangeofboundaryconditions.

简介：Thispaperpresentsasimplenonparametricregressionapproachtodata-drivencomputinginelasticity.Weapplythekernelregressiontothematerialdataset,andformulateasystemofnonlinearequationssolvedtoobtainastaticequilibriumstateofanelasticstructure.Preliminarynumericalexperimentsillustratethat,comparedwithexistingmethods,theproposedmethodfindsareasonablesolutionevenifdatapointsdistributecoarselyinagivenmaterialdataset.

简介：碳nanocones有相当迷人的电子、结构的性质，其轴的颤动很少在以前的研究被调查。在这份报纸，基于一个非局部的弹性理论，一个不一致的杆模型被使用在nanocones的轴的颤动上调查小规模的效果和不一致的效果。用修改Wentzel-Brillouin-Kramers(WBK)方法，一个asymptotic答案为一般不一致的nanorods的轴的颤动被获得。用类似的过程，然后，nanocones的轴的颤动为不一致的参数，模式数字和非局部的参数被分析。明确的表情为夹钳夹钳和夹钳免费的边界条件的模式频率被导出。因为对小长度规模的效果的无知，轴的颤动频率被古典杆模型高度过高估计，这被发现。

简介：ThesurvivalprobabilityofsuperheavynucleiproducedincoldfusionreactionsisstudiedbyusingthestandardFermigasleveldensityformulaandanalyzedwithfissionandneutronevaporationcharacteristicspredictedindifferenttheoreticalmodels.Theleveldensityformulausedinthislettersuppressestheratioofneutronemissionwidthtofissionwidth,Гn/Гf.ThedependenceofГn/Гfonthesaddlepointleveldensityparameterandexcitationenergyisalsoinvestigated.

简介：Theset-valuedoptimizationproblemwithconstraintsisconsideredinthesenseofsuperefficiencyinlocallyconvexlineartopologicalspaces.Undertheassumptionofic-cone-convexlikeness,byapplyingtheseperationtheorem,Kuhn-Tucker's,Lagrange'sandsaddlepointsoptimalityconditions,thenecessaryconditionsareobtainedfortheset-valuedoptimizationproblemtoattainitssupereffcientsolutions.Also,thesufficientconditionsforKuhn-Tucker's,Lagrange'sandsaddlepointsoptimalityconditionsarederived.

简介：WeprovethatatopologicalspaceisuniformEberleincompactiffitishomeomorphictoasuperweaklycompactsubsetCofaBanachspacesuchthattheclosedconvexhullcoCofCissuperweaklycompact.WealsoshowthataBanachspaceXissuperweaklycompactlygeneratediffthedualunitballBx＊ofX^＊initsweakstartopologyisafflnelyhomeomorphictoasuperweaklycompactlyconvexsubsetofaBanachspace.

简介：分离对称违背的测试在在粒子物理的标准模型理解弱相互作用的结构起了一个重要作用。历史上，这些大小广泛地与K和B介子的大样品在实验被执行了。一台高光明魅力设备与机会介绍物理学家包括地探索分离对称违背并且用雷普顿，魅力介子，和charmedbaryons测试标准模型。这份报纸为一家未来魅力工厂讨论几可能的大小。

简介：在这份报纸，我们为与不连续的系数解决弹性问题与错误控制建议适应有限元素方法。在方法的网孔不需要适合接口。我们建立一基于剩余是独立趋于增加的常数的posteriori错误估计；Lam????D

简介：

简介：Theexactformoftheexteriorproblemforplaneelasticityproblemswasproducedandfullyprovedbythevariationalprinciple.Basedonthis,theequivalentboundaryintegralequations(EBIE)withdirectvariables,whichareequivalenttotheoriginalboundaryvalueproblem,werededucedrigorously.TheconventionallyprevailingboundaryintegralequationwithdirectvariableswasdiscussedthoroughlybysomeexamplesanditisshownthatthepreviousresultsarenotEBIE.

简介：一条球形的人工的边界上的准确边界条件在这篇论文为线性弹性的三维的外面的问题被导出。在这个边界条件在人工的边界上被强加以后，仅仅在一个围住的领域定义的一个减少的问题被获得。如果一个人在变化明确的表达截断系列条款，有增加精确性的一系列近似问题能被导出，它等价于减少的问题。错误估计被介绍显示出错误怎么取决于有限elementdiscretization和近似问题的精确性。最后，一个数字例子被给表明建议方法的表演。

简介：Inthispaper,anewnumericalmethodfortheSignoriniprobleminthree-dimensionalelasticityispresented.Theproblemisreducedtoaboundaryvariationalinequalitybasedonanewrepresentationofthederivativeofthedoublelayerpotential.Furthermore,aboundaryelementprocedureisdescribedforthenumericalapproximationofitssolutionandanabstracterrorestimateisgiven.