Now showing items 697-716 of 2622

    • H ilbert 空间中g-Parseva l 框架的一些性质 

      肖祥春; 朱玉灿; 曾晓明 (数学学报(中文版), 2008-11)
      在Hilbert 空间中讨论g-Parseval 框架的一些性质 , 得到g-Parseval 框架约一些恒等式和不等式
    • HAMILTON CYCLES IN DIRECTED EULER TOUR GRAPHS 

      Zhang, F. J.; Guo, X. F.; 郭晓峰 (1987)
      In this paper we define the directed Euler tour graph of a directed Eulerian graph by T-transformations, which was introduced by Xia-Xin-guo in 1984, and prove that any edge in a directed Euler tour graph is contained in ...
    • HAMILTON CYCLES IN EULER TOUR GRAPH 

      Zhang, F. J.; Guo, X. F.; 郭晓峰 (1986)
      In this paper we define the Euler tour graph of an Eulerina graph by K-transformations, which was introduced by Kotzig in 1966 (in “Theory of Graphs” (P. Erdös and G. Katona, Eds.), Proc., Colloq., Tihany, Hungary, ...
    • Hamilton paths in Z-transformation graphs of perfect matchings of hexagonal systems 

      Chen, RS; Zhang, FJ; 张福基 (1997-04-18)
      Let H be a hexagonal system. The Z-transformation graph Z(H) is the graph where the vertices are the perfect matchings of H and where two perfect matchings are joined by an edge provided their symmetric difference is a ...
    • Hamiltonicity of 3-connected line graphs 

      Yang, Weihua; Xiong, Liming; Lai, Hongjian; Guo, Xiaofeng; 郭晓峰 (PERGAMON-ELSEVIER SCIENCE LTD, 2012-10)
      Thomassen conjectured that every 4-connected line graph is Hamiltonian. Lai et al. conjectured [H. Lai, Y. Shao, H. Wu, J. Zhou, Every 3-connected, essentially 11-connected line graph is Hamiltonian, J. Combin. Theory Ser. ...
    • Hammocks arising from the auslander-reiten quiver of representation-directed algebras 

      Lin Yanan (Chinese Science Bulletin, 1996-07)
      Hammocks have been introduced bu Brenner in order to give a numerical criterion for a finite traslation quiver to be the Auslander-Reiten quiver of some representation-finite algebra.Ringel and Vossieck gave a combinatorial ...
    • Hankel矩阵的离散Cosine变换的快速算法 

      汪祥 (2005-07-30)
      在图像和信号处理研究邻域,经常会涉及到结构矩阵的离散sine、快速傅里叶变换(FFT)及离散cosine变换.文献[6]的作者利用FFT给出了离散cosine变换的一个算法,计算变换矩阵的M个元素所需的计算量和存贮空间分别为O(N2logN)+O(M)和O(N2).本文利用Hankel矩阵的结构特点导出一递推关系式(见式(8)),给出了Hankel矩阵的离散cosine变换(DCT)的一个快速算法.该算法所需要的存贮空间为O(N),计算 ...
    • Hanoi塔问题的一个公式解(英文) 

      钱建国; 张福基 (2001-06-25)
      Hanoi塔问题自提出以来已有一百多年的历史.其间,这一问题吸引了许多的研究者.正如H.A.Simon所指出的,Hanoi塔问题对于认知科学就象大肠杆菌对现代基因学那样,是一个无价的研究标本.事实上,它已成为组合数学,人工智能,计算机科学以及规划等中的递归问题的典型例子,并由此产生了各种各样成熟的算法.回顾这些结果,我们提出一个基本问题:能否对Hanoi塔问题给出一个公式解?本文就此给出了一个肯定的回答.在我们的研究中,图论将是一个有力的工具
    • Hardy spaces associated with magnetic Schr枚dinger operators on strongly Lipschitz domains 

      Yang, Dachun; Yang, Dongyon; 杨东勇 (Elsevier Ltd, 2012 Decem)
      Let p鈭?0,1], 惟 be a strongly Lipschitz domain in Rn and A:=-(鈭?ia鈫?路(鈭?ia鈫?+V a magnetic Schrodinger operator on L2(惟) satisfying the Dirichlet boundary condition, where a鈫?=(a1,,an) 鈭圠loc2(惟,Rn) and 0鈮鈭圠loc1(惟). In this ...
    • Harish-Chandra modules for the q-analog Virasoro-like algebra 

      Lin, W. Q.; Tan, S. B.; 谭绍滨 (2006-03-01)
      Let (L) over cap be the q-analog Virasoro-like algebra. In this paper we prove that any Harish-Chandra module of (L) over cap with nontrivial center is isomorphic to a generalized highest weight module. Moreover, we show ...
    • Harmonic maps between complex Finsler manifolds 

      Xiao, Jinxiu; He, Qun; Chen, Zhihua; Qiu, Chunhui; 邱春晖 (Science Press, 2012, 十月)
      The variation formula of &part-energy and &part炉-energy is obtained for a smooth map between strongly pseudoconvex complex Finsler manifolds. Also, for such maps, the difference between &part-energy and &part炉-energy proves ...
    • Height probabilities in the Abelian sandpile model on the generalized finite Bethe lattice 

      Chen, Haiyan; Zhang, Fuji; 张福基 (AMER INST PHYSICS, 2013)
      In this paper, we study the sandpile model on the generalized finite Bethe lattice with a particular boundary condition. Using a combinatorial method, we give the exact expressions for all single-site probabilities and ...
    • Heredity of the index of convergence of the line digraph 

      Yan, WG; Zhang, FJ; 张福基 (2003-09-28)
      Let D be a digraph, and let L-n(D) and k(D) denote the nth iterated line digraph of D and the index of convergence of D, respectively. We prove that if D contains neither sources nor sinks, then: (I) k(L-n(D)) = k(D) = 0 ...
    • Hermite WENO schemes and their application as limiters for Runge-Kutta discontinuous Galerkin method II: Two dimensional case 

      Qiu, JX; Shu, CW; 邱建贤 (2005)
      A class of fifth-order weighted essentially non-oscillatory (WENO) schemes based on Hermite polynomials, termed HWENO (Hermite WENO) schemes, for solving one dimensional non-linear hyperbolic conservation law systems, was ...
    • Hermite WENO Schemes and Their Application as Limiters for Runge-Kutta Discontinuous Galerkin Method, III: Unstructured Meshes 

      Zhu, J; Qiu, JX; 邱建贤 (2009)
      In [J. Comput. Phys. 193:115-135, 2004] and [Comput. Fluids 34:642-663, 2005], Qiu and Shu developed a class of high order weighted essentially non-oscillatory (WENO) schemes based on Hermite polynomials, termed HWENO ...
    • Hermite WENO schemes and their application as limiters for Runge-Kutta discontinuous Galerkin method: one-dimensional case 

      Qiu, JX; Shu, CW; 邱建贤 (2004)
      In this paper, a class of fifth-order weighted essentially non-oscillatory (WENO) schemes based on Hermite polynomials, termed HWENO (Hermite WENO) schemes, for solving one-dimensional nonlinear hyperbolic conservation law ...
    • Hermite WENO schemes for Hamilton-Jacobi equations 

      Qiu, JX; Shu, CW; 邱建贤 (2005)
      In this paper, a class of weighted essentially non-oscillatory (WENO) schemes based on Hermite polynomials, termed HWENO (Hermite WENO) schemes, for solving Hamilton-Jacobi equations is presented. The idea of the reconstruction ...
    • Hermite WENO schemes with Lax-Wendroff type time discretizations for Hamilton-Jacobi equations 

      Qiu, JX; 邱建贤 (2007)
      In this paper, we use Hermite weighted essentially non-oscillatory (HWENO) schemes with a Lax-Wendroff time discretization procedure, termed HWENO-LW schemes, to solve Hamilton-Jacobi equations. The idea of the reconstruction ...
    • Hexagonal chains with maximal total pi-electron energy 

      Zhang, FJ; Li, ZM; Wang, L; 张福基 (2001-03-30)
      In the preceding Letter we determined the hexagonal chain (benzenoid hydrocarbon) with minimal total pi -electron energy. Further to that work, in this Letter the following result is obtained: in the set of all hexagonal ...
    • Hexagonal chains with minimal total pi-electron energy 

      Zhang, FJ; Li, ZM; Wang, L; 张福基 (2001-03-30)
      The total pi -electron energy of a conjugated molecule (within The framework of HMO approximation) can be calculated by its molecular graph. For the acyclic molecules, the extremal problem of some important types of ...