查询词典 method

Based on the Saint-venant equations describing the channel flow movement, the nonlinear algebraic equations derived by the use of Preissmann weighted implicit four-point scheme are solved with the Netwon-Raphson method. A combined Gauss main-element elimination method with compress-storage technique is proposed. The relaxation iterative method for solving branch river networks is extended, which can turn the problem of any complex river networks into the problem of a series of single rivers. The coupling of hydraulic model with water quality model is built up. The combined model was applied to a large complicated river networks with numerical hydraulic structure which influenced by strong tide, storm and heave rain. Visualization of computational results is realized by means of MapInfo, which displays the computational results in fast, convenient and accurate way.

水力模型以描述河道洪水波运动的Saint-Venant方程组为基础，用Newton-Raphson方法直接求解按Preissmann加权四点格式进行离散所得的非线性代数方程组，提出了压缩存贮形式的Gauss列主元消去法并对数值解的收敛性进行了讨论；将支流流量的松弛迭代方法从树状河系推广到了环状河网，使任意复杂河网水力计算的问题都可化为一系列的单一河道的水力计算问题；建立了水力模型与水质模型的联接，初步应用于既有洪水、暴雨、强潮等综合影响，又存在多种水工建筑物及水力调度问题的大型复杂河网中的非恒定流水力、水质计算问题；利用MapInfo对计算结果的可视化进行了研究，有利于决策者快速、方便、准确地作出决策。

Direct method of Gaussian elimination, Gaussian main-element elimination, and the iterative method of Jacobi iteration, Gauss - Seidel (Gauss - Seidel) iterative method is linear equations numerical solution of important ways.

直接法中的高斯消去法、高斯列主元消去法，以及迭代法中的雅可比迭代法、高斯-赛德尔（Gauss-Seidel）迭代法又是线性方程组数值求解的重要方法。

Based on the adequate study of general method to solve linear equation group, this thesis employs incomplete Cholesky conjugate gradient method for the numerical stability and efficiency of solution process. In order to eliminate morbidity of FEM coefficient matrix and speed up its convergency, this thesis proposes a newly effective incomplete Cholesky decomposition preconditioned method and suggests some improved preconditioned schemes to the current popular ICCG methods.

为了克服系数矩阵病态特性和加快收敛速度，本文从完全的Cholesky分解出发，构造出了一种新的不完全分解预处理方法，效果显著；另外，在已有的不完全Cholesky分解预处理方法的基础上，提出了十分有效的改进方案。

During the process of the system researching, A new mesh approach based on advancing front technique for triangle elements was studied. A practical method of generating hexahedron mesh for cellular element method through transfering lines into volumes was worked out. Moreover, a new hidden method for cellular models and a approach of forming stress images were also researched.

在软件研制过程中，提出一种基于前沿生成法的速度快、稳定性好的平面元胞元网格自动生成方法和三维六面体网格的线段转换法；根据元胞元模型的特点，提出一种稳健性较好的三维元胞元模型消隐方法；通过对应力图生成技术的研究，提出一种对等值线、色带图、浓淡图均适用的应力图快速生成算法。

In the fifth chapter, some usual cutting pattern methods such as Least Square method, Dynamic Programming method, Geodesic Line method are introduced.

本文第五章总结了一些膜结构的裁剪分析方法如最小二乘法，动态规划法，测地线法等。

Based on form-finding of the force density method,load analysis of the nonlinear finite element method and geodesic line cutting method,this paper summarizes some outlines in the design and construction of membrane structures.

以小商品城入口膜结构工程为例，结合力密度法找形、非线性有限元荷载分析、测地线裁切等基本理论，给出大型张力膜结构的设计与施工方法，总结了膜结构设计、施工的一些要点和经验，能给同类工程提供有益的参考。

In order to analyse the structural reliability by stochastic finite element method rapidly and efficiently, a method combined with finite element method and gradient optimum algorithm based on ANSYS is presented when referring to the geometric interpretation of structural reliability index.

为快速、高效地进行基于随机有限元法的结构可靠度分析，从结构可靠性指标的几何意义出发，提出了在ANSYS平台上采用有限元法和梯度优化算法相结合的方法进行可靠度分析的构想，对ANSYS进行二次开发实现了该方法。

In the text, the Spectral element method is used to model the seismic wave propagation, which is based on a weak formulation of the elastic mechanics equation. It combines the geometrical flexibility of the Finite element method and the accuracy of the pseudospectral method.

本文采用谱元法对横向同性介质中的地震波进行模拟，该方法基于弹性力学方程弱形式基础之上，具有有限元适应任意复杂介质模型的韧性和伪谱法的精度。

To introduce the method of matrix, the optical system design in detail in the optical polarization Jones matrixes of application, On the other hand, the geometrical optics lens, the relations between the theoretical calculation, and the calculation results of calculation method and the results are compared, consistent, this method is feasible and reasonable.

将矩阵方法引入光学系统的设计中，详尽地给出在偏振光学中琼斯矩阵的应用；另一方面，对几何光学中的透镜间的关系进行理论计算，并把计算结果与普通的计算方法做出的结果比较，它们是相吻合的，说明此方法是可行的，合理的。

Starting in terms of plural method, this paper points out the limitations of rational methods, and take an analysis on the significance of non-rational method. It introduces the 'trial and error method' of Popper, the 'radiative thinking' of Kuhn, the 'Gestalt psychology' of Wittgenstein and some other methods in science innovation.

本文从多元方法论的角度入手，指出理性方法的局限性，并对科学研究中非理性方法的重要性做了分析，重点介绍了波普尔的"试错法"、库恩的"发散式思维"和维特根斯坦的"格式塔心理学"及其他在科学创新中使用的非理性方法。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了