查询词典 method

The quasi wavelets method introduce regularizer and make the scale function regularity and localization attributes. A meshless method and a quasi wavelets method based on the natural boundary integral equation in this paper are presented. Corresponding formulas are developed for the implementation of the present method.

本文提出的自然边界元的无网格方法是将无网格方法与自然边界元方法相结合，使其不仅具有自然边界元的降维及计算便捷、稳定等优点，而且还具有无网格方法的只需节点信息、不必划分网格、后处理方便等优点，这使该方法在处理高维问题上计算简捷。

The conventional development fashions for the gas condensate fields mainly are natural depletion and cyclic gas injection: using the method of gas injection require know clearly about the formation and need more investment, so this method is used few in our country; although a good deal of condensate oil is loss in the formation because of the appearance of retrograde condensation by the method of natural depletion, it is the main development method in China because of the lower investment and lower perception level abut the formation .

凝析气藏主要有衰竭或循环注气两种开发方式：注气开发对地质条件以及资金投入要求较高在我国仅有少数气田采用该方式：虽然采用衰竭开发方式大量的液态烃由于反凝析而损失在地层中，但是由于其低的投资费用、对地质认识程度要求不高，该方式在我国仍然是主要开发方式。

The method in computer clsed befone is the method of nodal line. The method is appropriate if the computing procedure is separate from CAD procedure. But if they are integrative the method isn't appropriate.

以前的桥梁混凝土构件电算办法是节线法，这在结构计算程序与CAD程序是分开来时是合适的，如果CAD程序与结构计算程序合为一体时，节线法就不合适了，因为CAD程序的几何元素是用参数表示的[1 ] 。

A robot motion control architecture is studied in this paper as an example of distributed system. A guided global planning method including nonholonomic constraint is proposed. The method brings the flexibility and quickness of the local method into the reliable frame of global method.

本文以一个机器人运动控制系统为例进行分布式系统结构的研究，提出了一种有指导的全局规划方法，该方法集局部规划的灵活敏捷与全局规划的完整可靠于一体，可以嵌入多种全局规划框架下运行。

So the method is more convenient to be implemented than the modified combined homotopy method as well as the combined homotopy interior point method and the aggregate constraint homotopy method under weak normal cone condition.

因此动边界组合同伦方法比修正组合同伦方法及弱法锥条件下的组合同伦内点法和凝聚约束同伦方法更便于应用。

This thesis is divided into six parts. The first chapter is preface, the current status of research in the inverse problems for parabolic partial differential equations is reported; the second chapter is "regularization methods for numerical differentiation and their applications ", in this chapter we investigate many regularization methods from a viewpoint of regularization theory and algorithm, some applications in the inverse problems for parabolic partial differential equations are given; the third chapter is "spectral regularization methods". Based on Fourier analysis, within the framework of regularization theory, we apply the spectral methods to some ill-posed problems. Many numerical experiments are done in order to show the validity of the methods; the fourth chapter is devoted to wavelet dual least squares method and a revised wavelet method; in the fifth chapter,we combine finite difference method with method of lines and apply it to the backward heat conduction problem in time; in the sixth chapter "identification problems for unknown source ", the essence and the degree of two problems related to source identification are pointed out, at the same time, some numerical methods are reported.

本文分为六个部分，第一章前言简要分析了国内外抛物型偏微分方程反问题的研究现状；第二章数值微分的正则化及其应用从正则化理论和算法的角度出发，考察了许多正则化方法，还给出了数值微分在抛物型偏微分方程反问题的一些应用；第三章谱正则化方法是在Fourier分析的基础上，在一般正则化理论的框架下，给出了这种方法在各种不适定问题中的应用，数值实验表明谱方法是有效的；第四章研究了小波对偶最小二乘方法和改进的小波方法；第五章主要研究了有限差分方法结合线方法在时间反向热传导问题中的应用；第六章是未知源识别问题，主要指出了两类未知源问题的不适定程度和不适定本质，同时报告了一些数值方法。

The proposed method has the capability of predicting the performance of condenser including threedimensional effects due to the change of cooling water temperature and the multiple tube paths arrangement. The proposed algorithm is more suitable to the condenser of multiple tube-paths than existing method. The proposed method is applied to a N11220-1 condenser to demonstrate its predictive capability, the results indicate that condensation rate of each bay and the air concentration at gas offtake is quite different, which can not be predicted by two-dimensional method.

对N11220-1型凝汽器的一个实验工况的模拟表明，该方法的热流密度计算结果与实验结果吻合良好，证明方法是有效的，模拟结果还表明，由于冷却水温度沿程变化，沿轴向各个汽室的冷凝量和抽气口的空气浓度均有明显不同，而目前国内外仍在使用的二维模型程序无法考虑这些影响，计算精度较差。

MethodsPolysaccharides was extracted from fresh onion and onionskin by hot water leaching method, microwave-assisted freeze thawing method and ultrasonic wave method. The content of polysaccharides was determined by DNS method.

方法采用热水浸提法、微波辅助冻融法和超声波法从新鲜洋葱和洋葱皮中提取多糖，用DNS法测定多糖含量。

The material job and main conclusion are as follows:(1)A simple boundary orthogonalization procedure independence grids generation method is put forward on the base of algebraic grid generation method; Data structure and computational model on interface are established aiming at blocks of structured grids.(2) SIMPLE procedure is established in nonorthogonal grids by use of the finite volume method and in-depth discusses on special topic such as boundary condition in nonorthogonal grids, deferred correction method and grads compute on calculational nodes, and so on.

本文完成的具体工作和主要结论如下： 1以代数网格生成方法为基础提出了一种简单的、可独立于网格生成方法之外的边界正交化技术；针对分区结构网格系统建立了分区交界面处的数据结构与计算模型； 2利用有限体积方法在非正交同位网格系统中建立了SIMPLE求解算法，对非正交网格系统中的边界条件、延迟修正技术及计算节点的梯度计算等专题进行了深入讨论。

Continuous orthonormalization method, this method avoids those major difficulties with Henyey method and parallel shooting method.

数值计算求解时，我们改进和发展了连续正交归一化方法，设计出了我们自己的计算太阳振动频率和本征函数的程序。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。