The solitary wave solution of the two-dimensional regularized long-wave equation in fluids and plasmas

This paper investigates the solitary wave solutions of the two-dimensional regularized long-wave equation which is arising in the investigation of the Rossby waves in rotating flows and the drift waves in plasmas. The main idea behind the numerical solution is to use a combination of boundary knot method and the analog equation method. The boundary knot method is a meshless boundary-type radial basis function collocation technique. In contrast with the method of fundamental solution, the boundary knot method uses the non-singular general solution instead of the singular fundamental solution to obtain the homogeneous solution. Similar to method of fundamental solution, the radial basis function is employed to approximate the particular solution via the dual reciprocity principle. In the current paper, we applied the idea of analog equation method. According to the analog equation method, the nonlinear governing operator is replaced by an equivalent nonhomogeneous linear one with known fundamental solution and under the same boundary conditions. Furthermore, in order to show the efficiency and accuracy of the proposed method, the present work is compared with finite difference scheme. The new method is analyzed for the local truncation error and the conservation properties. The results of several numerical experiments are given for both the single and double-soliton waves.     

Flora_Flex: In Search of Synthetic Immortality

Evan Douglis performs alchemy, bringing to life from theinaminate ‘the natural’ with his genetically inspired Flora_flex prefab modular building system. He demonstrates the beauty, intricacy and opulence inherent in pursuing flowering plant morphology as a model for surface variation. Copyright © 2008 John Wiley & Sons, Ltd.     

后张法无黏结预应力砼梁的设计与施工

介绍了汕头市林百欣国际会展中心工程框架主梁采用后张法无黏结预应力砼梁设计计算和施工方法。     

面向协同装配规划的信息模型研究

为解决复杂产品的装配设计团队和装配规划团队间的协同工作,提出了装配结点概念,用以集成描述产品装配信息,利用装配结建立了产品的装配联系图模型,通过图模型中顶点和边的属性,分别独立描述零件和装配信息.给出了一个基于割顶点的装配联系图层次分解算法,构建了基于共享零件的产品结构层次树模型.基于结构层次树模型,描述了协同装配规划中的协同工作信息.利用实例说明了面向协同装配规划的信息建模过程及模型的有效性.     

A Deeper Structural Theory

The architectural critic and author Nina Rappaport celebrates a new structural synthesis that takes a holistic approach to tectonics, uniting the bones or structure of a building with its skin. She calls for a new structurally based theory that effectively fuses culture and technology, embracing ‘deep decoration’ and ‘subtle innovation’ and reviving a design tradition that can be traced back to AWN Pugin and John Ruskin. Copyright © 2010 John Wiley & Sons, Ltd.     

网络丝结构模型的研究

通过实验分析提出网络丝结构及其形成机理，并且在此基础上建立了网络结的结构模型，分析了加工工艺对网络丝结构和性能的影响。为开拓网络丝应用领域提供有益的理论依据。     

格网法绘制不规则区域等值线图的计算机实现

等值线图应用在许多方面，格网法绘制等值线是一常用方法，但在实际中常会遇到不规则边界格网．本文讨论了计算机绘制不规则边界格网等值线的过程，包括不规则边界格网节点数据的存贮与管理．     

Boundary knot method for some inverse problems associated with the Helmholtz equation

The boundary knot method is an inherently meshless, integration‐free, boundary‐type, radial basis function collocation technique for the solution of partial differential equations. In this paper, the method is applied to the solution of some inverse problems for the Helmholtz equation, including the highly ill‐posed Cauchy problem. Since the resulting matrix equation is badly ill‐conditioned, a regularized solution is obtained by employing truncated singular value decomposition, while the regularization parameter for the regularization method is provided by the L‐curve method. Numerical results are presented for both smooth and piecewise smooth geometry. The stability of the method with respect to the noise in the data is investigated by using simulated noisy data. The results show that the method is highly accurate, computationally efficient and stable, and can be a competitive alternative to existing methods for the numerical solution of the problems. Copyright © 2005 John Wiley & Sons, Ltd.     

样条函数的多结点技术

对多结点样条函数作了进一步的研究，构造了带参数的多结点样条基本函数，其保持了普通多结点样条函数的优越性。参数引进，使结点增多，使其可表达更加复杂的波动数据。由于基数型的插值公式形成一族，因此，可以根据实际问题的需要选择最优参数。     

逼近NURBS蒙皮曲面的算法

给出了一种逼近NURBS（非均匀有理B样条）蒙皮曲面的方法，用于对给定的一组平面NURBS截面线进行蒙皮。该方法包括两个算法：一个算法用于去除截面线相容性处理所产生的大量的冗余控制顶点，另一个算法用于确定蒙皮方向最优的节点矢量。本方法能够实现有效的数据压缩和光滑的曲面造型，逼近精度可由程序控制。文中的图例是作者为演示算法而构造的，通过这些图例可以证实算法的有效性。