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简介：Inthisarticlewedefineasurfacefiniteelementmethod(SFEM)forthenumericalsolutionofparabolicpartialdifferentialequationsonhypersurfacesFinR~(n+1).ThekeyideaisbasedontheapproximationofFΓbyapolyhedralsurfaceΓ_hconsistingofaunionofsimplices(trianglesforn=2,intervalsforn=1)withverticesonF.AfiniteelementspaceoffunctionsisthendefinedbytakingthecontinuousfunctionsonΓ_hwhicharelinearaffineoneachsimplexofthepolygonalsurface.WeusesurfacegradientstodefineweakformsofellipticoperatorsandnaturallygenerateweakformulationsofellipticandparabolicequationsonΓ.Ourfiniteelementmethodisappliedtoweakformsoftheequations.Thecomputationofthemassandelementstiffnessmatricesaresimpleandstraightforward.Wegiveanexampleoferrorboundsinthecaseofsemi-discretizationinspaceforafourthorderlinearproblem.Numericalexperimentsaredescribedforseverallinearandnonlinearpartialdifferentialequations.Inparticularthepowerofthemethodisdemonstratedbyemployingit,tosolvehighlynonlinearsecondandfourthorderproblemssuchassurfaceAllen-CahnandCahn-Hilliardequationsandsurfacelevelsetequationsforgeodesicmeancuryatureflow.

简介：Thispaperdealswithmodelgenerationforequationaltheories,i.e.,automaticallygenerating(finite)modelsofagivensetof(logical)equations.Ourmethodoffinitemodelgenerationandatoolforautomaticconstructionoffinitealgebrasisdescribed.Someexamplesaregiventoshowtheapplicationsofourprogram.Wearguethat,thecombinationofmodelgeneratorsandtheoremproversenablesustogetabetterunderstandingoflogicaltheories.Abriefcomparisonbetwweenourtoolandothersimilartoolsisalsopresented.

简介：§1.IntroductionIn[1],R.SchoenandS.T.Yanusedharmonicmaptostudythetopologyofanon-compactcompletestablehypersurfaceinamanifoldofnon-negativecurvature.Essentiallythemethodistoprovefirstthenonexistenceofsomekindofnonconstantharmonicmapandthentodrawtherelativeconclusionsconcerningthetopology.Suchnonexistencetheoremshavebeenobtainedin[3]and[4]incaseswheretheconcernedmanifoldsarecompact.Theaimofthispaperistostudythenon-compactcompletecase.Ourmainresultscanbestatedasfollows.

简介：我们首先在这份报纸决定概括恰当的亚群F的结构*有限的组G的(G)所有其缺点组(块)在自守组Aut(G)下面结合到Sylowp亚群或G的固定p亚群。那么，我们证明如果有限的组L对它的合适的Sylowp交叉的集合及物地起作用，那么，任何一个L/Op(L)有T.ISylowp亚群或p=2并且L/O2(L)的Sylow2亚群的正常闭合是2-nilpotent与完全descripted结构。这解决一个长打开问题。我们也在一半传递性上由以撒和普通及格学生获得经典结果的一些归纳。

简介：Inthispaper,weshallprovethatforanypositiveintergern,thereexistsnon-trivialcommutativefinitesemigroupofidempotentconsistingofsomen×nrealquaternionmatri-ceswhichislowersemilattice.Intheprocessofsolvingthisproblemweshallseethatmanypropertiesofgeneralizedinversesforcomplexmatricesstillholdforquaternionsma-

简介：Theballoon-basedcathetersareattractivefortheminimallyinvasiveproceduresbecausethesecatheterscanbeconfiguredtomatchrequirementsonsizeandshapefortheinteractionwiththesofttissue.Ananalyticalmechanicmodelisdevelopedforthedeformedballoontodeterminetheshapeoftheinflatedcatheter.Thebridgesalonglatitudinaldirectionshouldbehighstretchableduetothehighelongationalongthelatitudeoftheinflatablecatheter.Theseresultsagreewellwiththefiniteelementmethodwithoutanyparameterfitting.

简介：Anewhigh-ordertime-steppingfiniteelementmethodbaseduponthehigh-ordernumericalintegrationformulaisformulatedforSobolevequations,whosecomputationsconsistofaniterationprocedurecoupledwithasystemoftwoellipticequations.Theoptimalandsuperconvergenceerrorestimatesforthisnewmethodarederivedbothinspaceandintime.Also,aclassofnewerrorestimatesofconvergenceandsuperconvergenceforthetime-continuousfiniteelementmethodisdemonstratedinwhichtherearenotimederivativesoftheexactsolutioninvolved,suchthattheseestimatescanbeboundedbythenormsoftheknowndata.Moreover,someusefula-posteriorierrorestimatorsaregivenonthebasisofthesuperconvergenceestimates.

简介：本文研究具有混合边界条件半导体方程的近似解，给出了两种近似格式：Ｇａｌｅｒｋｉｎ离散格式和混合变量离散格式，同时还给出了误差分析

简介：Whethertheconceptofeffectivestressandstraininelastic-plastictheoryisstillvalidundertheconditionoffinitedeformationwasmainlydiscussed.Theuni-axialcompressionexperimentsinplanestressandplanestrainstateswerechosenforstudy.Inthetwokindsofstressstates,thestress-straincurvedescribedbylogarithmstrainandrotatedKirchhoffstressmatchestheexperimentsdatabetterthanthecurvesdefinedbyotherstressstraindescription.

简介：为食物可描绘的操作建模，食物供应链的特征被学习。论文的目的是造食物可描绘的一个抽象模型，并且获得食物可描绘和食物安全的更好的理解。基于消费者寻找可描绘信息的行为的分析，为食物可描绘的有限州的自动机被使用自动机介绍理论。食物供应链的状态被一张州的转变图代表。在这份报纸的自动机模仿全部食物供应链并且为行为描述和一个食物可描绘系统的结构的设计提供一个理论基础。

简介：Inthisnotewecharacterizethegeometricfactureofa(μ,r,k)-FES.Namely,foraC~μtriangularin-terpolationschcmewithC~rvertexdata,anyangleofthemacrotrianglemustbedividedintoatleast(μ+1)/(r+1-μ)parts.

简介：在这篇论文，我们学习有限复杂性的selfinjectiveKoszul代数学。当它是有限的时，我们证明复杂性是一个非否定的整数；并且范畴Jin郭云电子邮件：gjy@xtu.edu.cn全文预览(小，大)src=“http://ads.link.valueclick.net/jsmaster”type=text/javascript>type=text/javascript>如果(ValueLoaded)ValueShowAd()；language=JavaScriptsrc=...http://ads.link.valueclick.net/cycle?host=hs0005647&b=pagebuster.183&v=1.2.20&c=00&hcat=M100&kissn=1439-7617&kkeyword=selfinjectiveKoszul代数学，复杂性，斜组代数学，平淡的对称的代数学，16G60，16G20，有限complexity&aid=1439-7617&pid=10.1007/s10114-009-6703-0&bso=listed&msizes=468x60&t=js的16D50&kdoi=10.1007/s10114-009-6703-0&ktitle=SelfinjectiveKoszul代数学...>...>var闪光名字...“...”；varaltImgName=“http://cdn.valueclick.net/hg/0120/a0120602/Springer_TOC_Alerts.gif”；varxmlfile=“http://cdn.valueclick.net/hg/0120/a0120602/sgwIssnJournalMapping.xml”；varminFlashVer=5；var宽度=468；var高度=60；var按标签=“http://ads.link.valueclick.net/redirect?host=h0005647；size=468x60；t=js；c=00；target_id=0；hcat=M100；aid=1439-7617；pid=10.1007/s10114-009-6703-0；banner=a0120602；vcurlpreserve=”；vargifclickTAG=“http://ads.link.valueclick.net/redirect?host=h0005647；size=468x60；t=js；c=00；target_id=0；hcat=M100；aid=1439-7617；pid=10.1007/s10114-009-6703-0；banner=a0120602；vcurlpreserve=”；var插件=0；vard=文件；如果(navigator.mimeTypes&&navigator.mimeTypes[“application/x-shockwave-flash”]&&navigator.mimeTypes[“application/x-shockwave-flash”].enabledPlugin){如果(navigator.plugins&&navigator.plugins[“冲击波闪光”])varswver=(navigator.plugins[“冲击波闪光”].description.split(''))[2]；如果(swver>=minFlashVer)插件=1；}另外如果(navigator.userAgent&&navigator.userAgent.indexOf(“MSIE”)>=0&&(navigator.u

简介：Theauthorsstudyrecursivestructureswith'finitememory'inEuclideanmatricspaceandthemultifractaldecompositionofthecorrespondingfractals.Foranytwopositivenumbersq,β,andsucharecursivestructure,alinearoperatorV~(q,β)infinitedimensionalspaceisdefined.ThemultifractalspectrumisgivenbythespectralradiusofV~(q,β).

简介：这篇论文在各向异性的矩形的网孔的班上处理双线性的有限元素的高精确性分析。各向异性的网孔上的反的不平等被建立。超级结束和超级集中被获得因为第二订椭圆形的问题。数字测试被给，它与我们的理论分析与一致。

简介：Accordingtothelower-boundtheoremoflimitanalysistheRigidFiniteElementMeth-od(RFEM)isappliedtostructurallimitanalysisandthelinearprogrammingsforlimitanalysisarededucedinthispaper.Moreover,theThermo-ParameterMethod(TPM)andParametricVariationalprinciples(PVP)areusedtoreducethecomputationaleffortwhilemaintainingtheaccuracyofsolutions.Abettersolutionisalsoobtainedinthispaper.

简介：Inthispaper,alargeclassofndimensionalorthogonalandbiorthognalwaveletfilters(lowpassandhighpass)arepresentedinexplicitexpression.Wealsocharacterizeorthogonalfilterswithlinearphaseinthiscase.Someexamplesarealsogiven,includingnonseparableorhogonalandbiorthogonalfilterswithlinearphase.

简介：ThetransientbehaviorofasemiconductordeviceconsistsofaPoissonequationfortheelectricpotentialandoftwononlinearparabolicequationsfortheelectrondensityandholedensity.Theelectricpotentialequationisdiscretizedbyamixedfiniteelementmethod.Theelectronandholedensityequationsaretreatedbyimplicit-explicitmultistepfiniteelementmethods.Theschemesareveryefficient.Theoptimalordererrorestimatesbothintimeandspacearederived.

简介：Themathematicalmodelofsemiconductordevicesisdescribedbytheinitialboundaryvalueproblemofasystemofthreenonlinearpartialdifferentialequations.Oneequationinellipticformisfortheelectrostaticpotential;twoequationsofconvection-dominateddiffusiontypearefortheelectronandholeconcentrations.Finitevolumeelementprocedureareputforwardfortheelectrostaticpotential,whileupwindvolumeelementschemesforthetwoconcentrationequations.ErrorestimatesinL2normforournumericalschemesarederived.

简介：TheFiniteAnalyticMethod(FAM)isanewnumericalmethodforsolvingNavier-Stokesequations.However,oncomplexgeometricdomainsthismethodmustemploytheboundary-fittedcoordinatetransformation,whichbecomesverydifficultforsomeflowregions.Inthispaper,theIsoparametricElement,whichhasbeenwidelyusedintheFiniteElementMethod,isincorporatedintotheFAM.Theflowregionissubdividedintoanumberofsmallar-bitaryquadrilaterals,andeachelementistransformedintoasquareelementbytheshapefunc-tionsofIsoparametricElement.ThenthepartialdifferentialequationsonthesquareelementcanbesolvedbytheFAM.Asanexample,theflowintubebundleshasbeencalculatedbythismethod.