Now showing items 1610-1629 of 2622

    • w-Frchet可微性质和Radon-Nikod(?)m性质以及w-Asplund空间 

      程立新; 吴从炘 (2003-03-15)
      我们称定义在一个Banach空间的对偶空间上的广义实值w*-下半连续凸函数f具有w*-Frechet可微性质(w*-FDP),如果对于该对偶空间上的每个w*-下半连续的广义实值凸函数g,只要g≤f,就有g在intdom g的某个稠密的Gδ-子集上处处Frechet可微.本文用集合的Radon-Nikodym性质刻划了该种函数的特征.作为它的一个直接推论,给出了局部化的Collier定理.
    • WEAK TYPE (H ,L ) ESTIMATE FOR COMM UTATOR OF 

      Wu Huox iong; Zhang Pu (A pp l. M a th. J. Ch inese U n iv. S er. B, 2005)
      L et L8 , b be the commutato r generalized by the n2dimensionalM arcink iew icz integral L8 and a funct ion b∈BMO (Rn). It is p roved that L8 , b is bounded from the Hardy space H 1 (Rn) into the w eak L 1 (Rn) space.
    • Weighted composition followed and proceeded by differentiation operators from Zygmund spaces to Bloch-type spaces 

      Long, Jianren; Qiu, Chunhui; Wu, Pengcheng; 邱春晖 (SPRINGER INTERNATIONAL PUBLISHING AG, 2014-05-02)
      The boundedness and compactness of the weighted composition followed and proceeded by differentiation operators from Zygmund spaces to Bloch-type spaces and little Bloch-type spaces are characterized.
    • Weighted essential non-oscillatory schemes for tidal bore on unstructured meshes 

      Lu, CN; Qiu, JX; Wang, RY; 邱建贤 (2009)
      In this paper, the third-order weighted essential non-oscillatory (WENO) schemes are used to simulate the two-dimensional shallow water equations with the source terms oil unstructured meshes. The balance of the flux and ...
    • WEIGHTED KOPPELMAN-LERAY-NORGUET FORMULAS ON A LOCAL q-CONCAVE WEDGE IN A COMPLEX MANIFOLD 

      邱春晖; 姚宗元 (2003-12-30)
      <正> A weighted Koppelman-Leray-Norguet formula of (r, s) differential forms on a local g-concave wedge in a complex manifold is obtained. By constructing the new weighted kernels, the authors give a new weighted ...
    • Well-posedness for a class of nonlinear parabolic equations with strong degeneracy 

      Zhang, J. W.; 张剑文 (2007-07-01)
      In this paper, we establish the well-posedness for a class of nonlinear parabolic equations with strong degeneracy. By introducing a new definition of entropy solutions, we prove the uniqueness of weak solutions and this ...
    • Wendt操作对纽结和链环影响的若干规律 

      谭秋月; 孙平安; 林姝妤 (2015-11-13)
      主要研究在纽结和链环投影图上做一次WEndT操作对纽结和链环的影响,以及其与解结数和交叉指标的关系.定义了与纽结解结数密切相关的一个概念—纽结投影图的拟解结数和2分支链环投影图的拟分拆数,分别计算了纽结表中交叉指标不超过9的纽结和交叉指标不超过8的2分支链环的拟解结数和拟分拆数,并总结了若干经验规律.
    • WENO schemes with Lax-Wendroff type time discretizations for Hamilton-Jacobi equations 

      Qiu, JX; 邱建贤 (2007)
      In this paper, a class of weighted essentially non-oscillatory (WENO) schemes with a Lax-Wendroff time discretization procedure, termed WEND-LW schemes, for solving Hamilton-Jacobi equations is presented. This is an ...
    • When a digraph and its line digraph are connected and cospectral 

      Zhang, FJ; Lin, GN; 张福基 (1998-04-06)
      In this paper we characterize all digraphs each one of which is cospectral with its line digraph and both the digraph and its line digraph are connected. Some related enumeration problems are also considered. From these ...
    • Whittaker modules for the Schrodinger-Witt algebra 

      Zhang, X. F.; Tan, S. B.; Lian, H. F.; 谭绍滨 (2010-08)
      In this paper, Whittaker modules for the Schrodinger-Witt algebra so) are defined. The Whittaker vectors and the irreducibility of the Whittaker modules are studied. so has a triangular decomposition according to its Cartan ...
    • Whittaker modules for the Schr¨odinger-Virasoro algebra 

      Xiufu Zhang; Shaobin Tan; Haifeng Lian; 谭绍滨 (Journal of Mathematical Physics, 2010-08)
      In this paper, Whittaker modules for the Schr¨odinger-Virasoro algebra sv are defined. The Whittaker vectors and the irreducibility of the Whittaker modules are studied. sv has a triangular decomposition according to ...
    • Wiener Index and Perfect Matchings in Random Phenylene Chains 

      Chen, AL; Zhang, FJ; 张福基 (2009)
      In this paper we obtain an explicit analytical expression for the expected value of the Wiener index of a random phenylene chain and a simple exact formula for the expected value of the number of perfect, matchings in a ...
    • Wiener Index in Random Polyphenyl Chains 

      Yang, Weiling; Zhang, Fuji; 杨维玲 (2012)
      The Wiener index of a connected graph is the sum of the distances between all pairs of vertices of the graph. In this paper, we obtain a simple exact formula for the expected value of the Wiener index of a random polyphenyl chain.
    • Wiener Index in Random Polyphenyl Chains 

      Yang, Weiling; Zhang, Fuji; 张福基 (2012)
      The Wiener index of a connected graph is the sum of the distances between all pairs of vertices of the graph. In this paper, we obtain a simple exact formula for the expected value of the Wiener index of a random polyphenyl chain.
    • y--2=x--3-27x-62上的整数点(英文) 

      祝辉林; 陈建华 (2009)
      使用代数数论和P-AdIC分析,我们我到了椭圆曲线y--2=X--3+27X-62上所有的整数点。我们给出了一个全虚四次域的子环上计算基本单位和二次代数数“不相关分解“的方法。
    • Z-TRANSFORMATION GRAPHS OF PERFECT MATCHINGS OF HEXAGONAL SYSTEMS 

      Zhang, F. J.; Guo, X. F.; Chen, R. S.; 郭晓峰 (1988)
      Let H be a hexagonal system. We define the Z-transformation graph Z(H) to be the graph where the vertices are the perfect matchings of H and where two perfect matchings are joined by an edge provided their symmetric ...
    • Z-transformation graphs of perfect matchings of plane bipartite graphs 

      Zhang, HP; Zhang, FJ; Yao, HY; 张福基 (2004-02-06)
      Let G be a plane bipartite graph with at least two perfect matchings. The Z-transformation graph, Z(F)(G), of G with respect to a specific set F of faces is defined as a graph on the perfect matchings of G such that two ...
    • Zero dissipation limit to a Riemann solution consisting of two shock waves for the 1D compressible isentropic Navier-Stokes equations 

      Zhang YingHui; Pan RongHua; Tan Zhong; 谭忠 (SCIENCE PRESS, 2013)
      We investigate the zero dissipation limit problem of the one dimensional compressible isentropic Navier-Stokes equations with Riemann initial data in the case of the composite wave of two shock waves. It is shown that the ...
    • Zero relaxation limit to centered rarefaction waves for Jin-Xin relaxation system 

      Zhang, Yinghui; Tan, Zhong; Sun, Ming-Bao; 谭忠 (NONLINEAR ANAL-THEOR, 2011-03-15)
      In this paper, we study the zero relaxation limit problem for the following Jin-Xin relaxation system {u(t) + v(x) = 0 v(t) + a(2)u(x) = 1/epsilon (f(u) - v) (E) with initial data (u, v)(x, 0) = (u(0)(x), v(0)(x)) -> (u ...
    • Zero Surface Tension Limit of Viscous Surface Waves 

      Tan, Zhong; Wang, Yanjin; 谭忠; 王焰金 (SPRINGER, 2014 JUN)
      We consider the free boundary problem for a layer of viscous, incompressible fluid in a uniform gravitational field, lying above a rigid bottom and below the atmosphere. For the "semi-small" initial data, we prove the zero ...