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184 个结果
  • 简介:Thepaperpresentsthevariationalformulationandwellposednessofthecouplingmethodoffiniteelementsandboundaryelementsforradiationproblem.Theconvergenceandoptimalerrorestimatefortheapproximatesolutionandnumericalexperimentareprovided.

  • 标签: FORMULATION VARIATIONAL APPROXIMATE radia 日主 鲁石
  • 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.

  • 标签: 表面偏微分方程 表面有限元法 测地曲率 三角形表面 抛物线方程
  • 简介:在这篇论文,二个新非一致的六角形的元素被介绍,它基于trilinear功能空间Q(3)1并且是面向边的,对旋转Q1四边的元素的盒子相似。先验的错误估计被给证明新元素在L2标准在精力标准和秒顺序精确性完成一阶的精确性。这理论结果被数字测试证实。数学题目分类:65N15,65N30。

  • 标签: 六边形有限元 非一致性有限元 Q1有限元 函数
  • 简介:近年来数字摄影之所以能够蓬勃发展,与图像处理软件的不断升级进步有很大关系。也许其中贡献最大的就是Adobe公司。这家公司不但出品了著名的Photoshop软件,还推出了一款价格相对低廉、专供家庭使用的图像处理软件——PhotoshopElements。

  • 标签: ELEMENTS PHOTOSHOP软件 图像处理软件 Adobe公司 简便 数字摄影
  • 简介:Translationcannotexistalone.Itmustbecarriedoutbyitsagentthatisundermultipleinfluenceofhistory,culture,powerandothersocialelementsforheisexactlytheproductofsociety.Meanwhile,thoseelementsalsochangeandevolvewiththedevelopmentoftranslation.Therelationshipbetweenthemcanbeconsideredasratherdelicateandsophisticated.

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  • 简介:Whenthered-blacksubdivisionsaresatisfied,aniterativesubstructuringmethodisproposedtosolvethealgebraicsystemofequationsarisingfromthediscretizationofsymmetricellipticproblemsvianonconformingfiniteelementswhichareonlycontinuousatthequasi-uniformmeshnodes.Theoreticalanalysisisgivenandtheresultsofnumericalexperimentsarereported.

  • 标签: DOMAIN DECOMPOSITION nancoforming ELEMENT substructme
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  • 简介:健全生产的沙的主要元素作文第一次和稀土元素的元素(REE)和另外的选择元素被报导。在从在日本的Miyagi和Tottori的沙滩沙的稀土元素的元素集中被决定由联合正式就职,氩血浆spectrometry(ICPMS)到相对父母岩石描绘健全生产、沉默的沙的REE。健全生产的沙沙滩是很普通的并且在整个在在Miyagi的Japan:five沙滩并且2在区域与另外的沉默的沙沙滩在Tottori被选择。从Miyagi和Tottori的健全生产的沙和沉默的沙样品包含超过60wt%ofSiO_2并且主要由石英和长石组成。Miyagi沙样品被轻REE丰富和类似于本地来源沙岩的那些的完全使球粒状陨石正常化的模式描绘。然而,从在Miyagi的Miyatojima的所有沙样品显示出积极Eu异例,没在另外的沙显示出的一个典型特征从Miyagi取样。Tottori沙样品被高REE内容和显著积极Eu异例也描绘。包含lowerREE内容的沙由于高石英和长石内容。Miyatojima沙样品和Tottori沙样品有高REE内容并且由于长石的存在显示出显著积极Eu异例。最好的结果作为健全生产的沙和silents的类似的一项措施地质的方法和PrincipalComponent分析(PCA)用所有被获得并且。健全生产的沙和沉默的沙之间的差别从PCA结果被获得。

  • 标签: 日本 发声沙滩 无声沙滩 稀土元素 常量元素 微量元素
  • 简介:Adsorptionanddesorptionofexogenousrareearthelements(REE)insoilswerestudied.ResultsshowedthatsoilshadstrongadsorbabilityforREEandtherateofadsorptionofREEwasover95%oftheaddedREEinthesetests.ThecharacteristicsofadsorptionisothermscorrespondedwellwiththebothFreundlichandTemkinequations,butdeviatedfromtheLangmuirequation.TheadsorptionofREEtendedtoincreasewiththerisingofsoilpH.AsequentialextractionmethodusedforstudingthedesorptionanddistributionofREEsorbedinsoilsarealsodiscussed.

  • 标签: 土壤成分 稀土元素 吸附作用 解吸附作用 外生稀土元素 形态
  • 简介:Basedonfractalsuperfibersandbinaryfractalfibers,thefollowingobjectivesareapproachedinthispaper:First,theconceptofmultiple-cellelementsisinducedandabstracted.Second,throughmultiple-cellelements,theconstructabilityofregularmultifractalswithstrictself-similaritiesisconfirmed,andtheuniversalityoftheconstructionmodeforregularmultifractalsisproved.Third,throughtheconstructionmodeandmultiple-cellelements,regularmultifractalsaredemonstratedtobeequivalenttogeneralizedregularsinglefractalswithmultilayerfinestructures.Onthebasisofsuchequivalence,thedimensionformulaoftheregularsinglefractalisextendedtothatoftheregularmultifractal,andthegeometryofregularsinglefractalsisextendedtothatofregularmultifractals.Fourth,throughregularmultifractals,afewgoldenfractalsareconstructed.

  • 标签: 多重分形 细胞分子 超级纤维 诱导因素 教学模式 精细结构
  • 简介:TheapplicationsofbionicmethodologydevelopedbytheLaboratoryofDesignandMaterialSelectionasbasisinthecreationofjunctionelementsweredemonstrated.TheseelementsfavortheapplicationofEcodesigninreferencetotheeffec-tivenessofproductdismountaimingthereductionofambientimpactinallitsphasesofuse.Thecreation,thedevelopmentandtheconfectionofnewjunctionelementsweredescribed,andcasestudiesofnewproductsdevelopedspecificallywiththispurposewerepresented.

  • 标签: 仿生学研究 生态设计 连接零件 产品开发
  • 简介:"TheEgg",whichisregardedasmostdeservingtobeplaced"amongthegreatstoriesoftheworld"(Howe168),issurelythebestexampleofSherwoodAnderson’sshortfictions,ofwhichthethemeisaccuratelysummarizedbyYaoxinChanginhisASurveyofAmericanLiterature:

  • 标签: 职业技术学院 张家口 外语系
  • 简介:为L~的极大元的一条存在定理*在non-paracompactH空间上定义的-majorized通讯被建立。作为结果的应用程序,为non-paracompact的一条平衡存在定理在H空间概括了游戏与无穷地许多播放器并且与L~*-majorized通讯被给。

  • 标签: 最大元素 存在性定理 广义博弈 H-空间