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

  • 标签: 基金资助 数学年 中国有色金属工业 湖南 基础学科 总公司
  • 简介:Thebehaviorofthestressintensityfactoratthetipsofcrackssubjectedtouniaxialtensionσχ^∞=pwithtraction-freeboundaryconditioninhalf-planeelasticityisinvestigated.Theproblemisformulatedintosingularintegralequationswiththedistributiondislocationfunctionasunknown.Intheformulation,wemakeusedofamodifiedcomplexpotential.Basedontheappropriatequadratureformulastogetherwithasuitablechoiceofcollocationpoints,thesingularintegralequationsarereducedtoasystemoflinearequationsfortheunknowncoefficients.Numericalexamplesshowthatthevaluesofthestressintensityfactorareinfluencedbythedistancefromthecrackstotheboundaryofthehalf-planeandtheconfigurationofthecracks.

  • 标签: ELASTIC HALF-PLANE Multiple cracks SINGULAR integral
  • 简介:为球形的质子emitters的质子放射性的一半生活在Wentzel-Kramers-Brillouin近似理论上被调查。显微镜的质子原子核相互作用潜力被与重新使正常化的M3Y有效相互作用合拢剩余女儿原子核的密度获得。我们也在计算考虑分光镜的因素(Sp),它用力量NL3在相对论的吝啬的域途径被评估。计算结果被发现在对试验性的数据的好同意。[从作者抽象]

  • 标签: 计算结果 质子辐射 球形 发射器 生活 相互作用势
  • 简介:这篇论文在一根一半线上调查singularsub线性的边界价值问题的积极答案的存在。为积极连续答案或光滑的答案在上的存在的必要、足够的条件[0,∞)被构造新更低、上面的答案给。

  • 标签: 奇异边值问题 正解 存在性 连续解 光滑解
  • 简介:Themulti-parameterinversescatteringproblemofelasticwaveequationwithsinglefre-quencyisinvestigatedwithinBornapproximation.Byuseofawidebandmeasuringschemeinwhichbothtransmittersandreceiversscanoverthehalf-spacesurface,theformulaofthescatteringfieldofelasticwaveisderived.Fourtypesofmodeconversionofelasticwave(P→P,P→S,S→P,S→S)areseparatedfromthescatteringfield.Thesecomponentscontainsufficientinformationforustorecon-structtheconfigurationsofthedensityandLaméparametersofthemedium.Theinverseformulashavetheformoffilteredback-propagationasintheacousticdiffractiontomography.Computersimu-lationsarealsoobtained.

  • 标签: ELASTIC WAVE MULTI-PARAMETER INVERSE SCATTERING
  • 简介:Inthispaper,weconsiderthenonsymmetricalhalf-planeprediction.Apredictiontheoreticproofofthefundamentalformulaaboutonesteppredictionerrorisgiven.AWold-typedecompositionanditsspectralrepresentationtheoremareproved.Spectralextractionproblemsofthehalf-planeinnova-tionsanditssingularcomponentsareinvestigated.

  • 标签: SINGULAR proof REGULARITY whenever PRED ANSWER
  • 简介:Inthispaper,thenotionofp-waveletpacketsonthepositivehalf-lineR+isintroduced.Anewmethodforconstructingnon-orthogonalwaveletpacketsrelatedtoWalshfunctionsisdevelopedbysplittingthewaveletsubspacesdirectlyinsteadofusingthelowpassandhigh-passfiltersassociatedwiththemultiresolutionanalysisasusedintheclassicaltheoryofwaveletpackets.Further,themethodovercomesthedifficultyofconstructingnon-orthogonalwaveletpacketsofthedilationfactorp>2.

  • 标签: 非正交小波包 WALSH函数 多分辨率分析 小波子空间 高通滤波器 经典理论
  • 简介:Inthisworkpropagationofanti-plane(SH)wavesintwopiezoelectricceramichalf-spaceswithathinlayerofasemiconductingmaterialbetweenthehalf-spacesisstudied,andwaveattenuationanddispersioncausedbysemiconductionaswellaswaveamplificationbyabiasingelectricfieldareexamined.

  • 标签: 压电陶瓷 半导体薄膜 电磁波 传播效果
  • 简介:Thispaperisconcernedwiththelarge-timebehaviorofsolutionstoaninitial-boundary-valueproblemforfullcompressibleNavier-Stokesequationsonthehalfline(0,∞),whichisnamedimpermeablewallproblem.Itisshownthatthe3-rarefactionwaveisstableunderpartiallylargeinitialperturbationiftheadiabaticexponentγiscloseto1.Herepartiallylargeinitialperturbationmeansthattheperturbationofabsolutetemperatureissmall,whiletheperturbationsofspecificvolumeandvelocitycanbelarge.Theproofisgivenbytheelementaryenergymethod.

  • 标签: 可压缩NAVIER-STOKES方程 稳定 稀疏波 初始扰动 初边值问题 大时间行为
  • 简介:Inthepaper,generalizedordersandgeneralizedtypesofDirichletseriesintherighthalf-planearegiven.Someinterestingrelationshipsonmaximummodulus,themaximumtermandthecoefficientsofentirefunctiondefinedbyDirichletseriesofintherighthalf-planeareobtained.

  • 标签: DIRICHLET级数 半平面 广义 类型 订单 大模数
  • 简介:ALegendrespectralelement/LaguerrecoupledmethodisproposedtonumericallysolvetheellipticHelmholtzproblemonthehalfline.Rigorousanalysisiscarriedouttoestablishtheconvergenceofthemethod.Severalnumericalexamplesareprovidedtoconfirmthetheoreticalresults.TheadvantageofthismethodisdemonstratedbyanumericalcomparisonwiththepureLaguerremethod.

  • 标签: 赫尔姆霍茨问题 光谱方法 Laguerre耦合方法 半直线
  • 简介:Surfaceeffect,whichisattributedtothedifferentenvironmentsurroundingthesurfaceornear-surfaceatomsfromthatembracingthebulkatoms,maybecomesignificantwhenthesurface-to-volumeratioofabodyislarge.Thispaperconsiderstheeffectofaplaneboundaryofapiezoelectricbodymodeledasathinlayerwithspecifiedmaterialproperties,forwhichatransferrelationbetweenthestatevectorsatthetopandbottomsurfacesisderivedbasedonthestate-spaceformulations.Theequationsofsurf...

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  • 简介:Theinversionofstongscattererembeddedinthehalf-spaceisanimportantprobleminengi-neeringandaverydifficultnonlinearprolbeminmathematics,forwhichtheBorniterativemethodisofnoeffect.Inthispaperthemomentmethodisusedinthediscretizationprocedure.Anumericalapproachispr-esentedbyemployingtheregularizationtechniqueandDBI(distortedBorniterative)method.Thesimulationresultsshowthattheapproachpresentedisefficient.

  • 标签: INVERSION NONLINEARITY STRONG SCATTER HALF-SPACE
  • 简介:在这篇文章,作者们与在正确一半飞机会聚的零目学习Laplace-Stieltjes变换的生长,定义指数的目和指数的低目,并且发现在他们之间的关系。类似于Dirichlet系列的一些结果被获得。

  • 标签: 多边形 指数函数 数学分析 收敛问题