求解

In Chapter 2,a steady permeability identification problem in elliptic equa-tions for two-dimensional orthotropic medium is considered.We construct afunctional,obtain its first and second Gateaux differential,and prove that thefunctional is strictly convex on a convex admissible function set.We seek to iden-tify the permeability by minimization of the above functional.

第二章研究了二维稳态正交异性介质的渗透率反演问题，我们构造了一个泛函，求得该泛函的一、二阶Gateaux微分，证明了它在一个凸的容许集上的严格凸性，并使用极小化泛函即变分方法来求解此问题。

By the new method, the processing steps in the method of back and forth error compensation and correction during solving the advection item can be substantially reduced.

该方法简化了进退误差补偿修正方法对直接影响烟雾模拟实时性和真实性的对流项的求解步骤，从而减少计算时间。

These methods give solutions of adversarial problems by focusing on different points of view, and are of great advantage to adversarial problems solving.

这些方法从不同的角度对对抗性问题的难点问题提供了解决方案，有利于对抗性问题的求解。

Hence, it is worthwhile to develop image understanding system aimed at specific task and problem, utilizing some knowledge reasonably and advisably to reduce present inefficient algorithm uncertainty, improve processing accuracy and reduce unnecessary computation.

在此情况下，从具体任务出发，针对某个具体任务和问题建立专用应用系统，同时合理和适当的引入一些知识，以减小问题求解的不确定性、提高理解结果的准确性、减少不必要的计算是有一定的现实意义的。

The followings are studied in this paper:(1) The orbit is evaluated according to a three-dimensional numerical model of the aerated water jet.

根据掺气水舌入水喷溅特性，建立了水滴在重力、浮力、空气阻力、水舌风及环境风的作用下的水滴随机运动的微分方程，给出了数值计算模型求解降雨强度的计算方法。

The numerical solution of incompressible viscous flow over an aerofoil is obtained by H-type grids and a special difference scheme.

本文用H型网格和特殊的差分格式数值求解了粘性不可压缩叶型绕流。

And then, after establishing the optimization model in accordance with the principle of optimal design of shape formulas, we could obtain the numerical optimization aerofoil on the basis of NACA0018 master pattern solved by the Fluent console, and discuss the reasons of improvement of power coefficient.

然后按照形函数的优化设计原理，建立了优化模型，用Fluent平台求解，在NACA0018母型基础上得到数值优化翼型，并探讨了能量利用率提高的原因。

As important ways for numerical solutions of partial differential equations, spectral methods have been developed rapidly in the past several decades. They not only have been widely applied to numerical simulations in various fields such as physics, mechanics, aerology, oceanics etc, and their theories of numerical analysis also tend to perfect.

作为数值求解的一种手段，谱方法在近几十年得到了蓬勃的发展，它不仅被广泛运用于物理、力学、大气、海洋等领域的数值计算，而且它的数值分析理论也不断地趋于完善。

Chapter 3 mainly describes the afferent outside give pharmacy of the establishment of the room model and solve the process.

第三章主要叙述血管外给药房室模型的建立及求解过程。

At last,we use these feature regions to construct affine invariant s,based on affine geometry invariant property.

利用仿射区域划分获取一组扩展质心集合作为图像特征点集；求解特征点集的凸包，根据扩展质心的性质将凸包顶点均匀组合成若干特征区域；利用仿射几何性质构造了有效的仿射不变量。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。