简介：TernarymetalchalcogenidesemiconductorAg8SnS6,whichisanefficientphotocatalystundervisiblelightradiation,isstudiedbyplane-wavepseudopotentialdensityfunctionaltheory.Aftergeometryoptimization,theelectronicandopticalpropertiesarestudied.Ascissoroperatorvalueof0.81eVisintroducedtoovercometheunderestimationofthecalculationbandgaps.Thecontributionofdifferentbandsisanalyzedbyvirtueoftotalandpartialdensityofstates.Furthermore,inordertounderstandtheopticalpropertiesofAg8SnS6,thedielectricfunction,absorptioncoefficient,andrefractiveindexarealsoperformedintheenergyrangefrom0to11eV.TheabsorptionspectrumindicatesthatAg8SnS6hasagoodabsorbencyinvisiblelightarea.Surfaceenergiesandworkfunctionsof(411),(413),(211),and(112)orientationshavebeencalculated.TheseresultsrevealthereasonforanoutstandingphotocatalyticactivityofAg8SnS6.

简介：在一篇最近的文章[物理信A372(2008)417]，王等。建议了一个方法，它被叫(G'/G)扩大方法，寻找非线性的进化方程的旅行波浪答案。包含KdV方程，mKdV方程，变体Boussinesq方程，和Hirota一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G)扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文，我们将证明(G'/G)扩大方法等价于扩大tanh功能方法。

简介：一个近似方法向前被带预言声学的压力基于表面velocity.It被称为方法(ERSM).The学习在声学的压力由在统一速度和其它表面元素颤动的相应表面元素散发了的声学的转移向量(ATV)平等者发现那个各个元素的元素放射重叠保留still.that声学的压力被相应困惑的pistonvibrating在统一velocity.So散发，它利用声学的压力radiat

简介：Inthispaper,hierarchicalbasismethodforsecondordernonsymmetricandindefiniteellipticproblemonapolygonaldomain(possiblynonconvex)discretedbyavertex-centeredcovolumemethodisconstructed.

简介：证明了图2Kv的可旋转(4,6)圈系存在的充分必要条件为:v≥10,v≡0,5(mod10).更多还原

简介：OurJournalATAwasfoundintheWinterof1984atthebeautifulcoastalcityDalian,China,theEditorsinchiefwereProfessorC.K.Chui(abroad),andthelateProfessorM.D.Cheng(domestic).20years,itseemstobeshort,however,theJournalhasdevelopedquicklyandchangedalot.

简介：

简介：一个单圈图G的邻接矩阵是奇异的当且仅当G含完美匹配和4m(m∈N)阶圈,或G和从G中删去唯一圈中的顶点及其关联边后得到的导出子图均不含完美匹配.单圈图的邻接矩阵的最大行列式是4.

简介：Itisveryimportanttomeasurelocaldeformationsforanin-depthunderstandingofmechanicalpropertiesandfracturemechanismofstructuralandfunctionalmaterials.Inthispaper,differenttypesofmodelgridfabricationmethodsandmanytypesofelectronMoiremethodsusinganelectronbeamdrawingsystem,ascanningelectronmicroscopeorafocusionbeamarereported,togetherwiththeirapplicationsinthemeasurementofdeformationsoccurringinvariousengineeringsandmaterialsscienceresearch.

简介：AccordingtotheanalyticalcharacteristicsofcubicBsplinefunction,suchascompactnessanddiscontinuoussmoothness,twomethods,GlobalintegralmethodandAssemblingmethodareproposedtocalculatethenon-linearstiffnessmatrixinthesplinefiniteelementmethod.TheGlobalintegralmethodtransformstheintegraloftheproductofsplinefunctionsintothesumofboundarydataoftheproductbyintegralbyparts.TheAssemblingmethodusesthecompactnesscharacteristicsofthesplinefunction,reducesthen+3orderstiffnessmatrixinunitintervaltothe4ordermatrix,andthenobtainstheglobalmatrixbyassemblingthesmallones.Thetwoproposedmethodsareclearintheoryandeasytoberealizedbycomputerprogram,whichcaneffectivelyimprovetheefficiencyofthealgorithmfornonlinearsplineelementmethod.

简介：在教学中，经常会遇到条件不明确的问题，学生常顾此失彼，导致少解或漏解，这需要对不明确条件逐一分析讨论、做出正确的判断，这就是物理中的分类思想。

简介：

简介：我们考虑决定作为生气的节有一条开的弧的薄绝缘的无限的柱体的形状的反的散布问题。假设电场在TM模式被极化，这为在R2在一条开的弧的外表定义的Helmholtz方程导致一个混合边界价值问题。我们假定弧混合了Dirichlet阻抗边界状况，并且试着由使用因式分解方法通过远地模式恢复弧的形状。然而，我们不能使用樱桃酒介绍对待远地操作员F的基本定理，并且一些辅助操作员不得不被考虑。到我们的问题的因式分解方法的理论确认在这份报纸被给，并且一些数字结果被介绍显示出我们的方法的生存能力。[从作者抽象]

简介：

简介：

简介：在这份报纸，我们为在quadrilaterals上定义的混合边界价值问题调查一个新pseudospectral方法。我们介绍新Legendre高斯类型插值并且证实基本近似结果，它为在quadrilaterals上定义的部分微分方程在pseudospectral方法起重要作用。我们为二个模型问题建议pseudospectral方法并且证明他们的光谱精确性。数字结果表明他们的高效率。在这份报纸开发的近似结果对在复杂领域上定义的另外的问题也适用。[从作者抽象]

简介：

简介：Thispaperdealswithrationalinterpolation.Fromalgebraicviewpoint,wepresentanalgebraicformulationofrationalinterpolationanddiscusstheexistenceoftheinterpolationfunction.Finallyanalgorithmforunivariatecaseandanexamplearepresented.

简介：AmeshlessapproachtoanalysisofarbitraryKirchhoffplatesbythelocalboundaryintegralequation(LBIE)methodispresented.Themethodcombinestheadvantageousfeaturesofallthethreemeth-ods:theGalerkinfiniteelementmethod(GFEM),theboundaryelementmethod(BEM)andtheelement-freeGalerkinmethod(EFGM).Itisatrulymeshlessmethod,whichmeansthatthediscretizationisinde-pendentofgeometricsubdivisionintoelementsorcells,butisonlybasedonasetofnodes(orderedorscat-tered)overadomaininquestion.Itinvolvesonlyboundaryintegration,however,overalocalboundarycen-teredatthenodeinquestion;Itposesnodifficultiesinsatisfyingtheessentialboundaryconditionswhileleadingtobandedandsparsesystemmatricesusingthemovingleastsquare(MLS)approximations.Itisshownthathighaccuracycanbeachievedforarbitrarygeometriesforclampedandsimply-supportededgeconditions.Themethodisfoundtobesimple,efficient,andattractive.

简介：Inthispaper,severalusuallyusedpolynomialinterpolationmethodsareexplainedinviewofvectorbasisanddimensioninlinearalgebratheory.Usingtransitionmatrixes,generalconversionformulabetweenthebasisfunctionsetsofthesepolynomialinterpolationmethodsaregiven.Anexamplealsoshowstheeffectivenessoftheresults.