问题求解

This thesis presents some refined algorithms for large unsymmetric matrix eigenproblems and investigates their convergence and restart.

本文研究求解大规模非对称矩阵特征问题的一些精化投影算法、算法的收敛性以及算法的重新启动等问题。

Moreover, Arnoldi method was also applied to the generalized unsymmetric eigenvalue problem, which arised from the applying of BEM to the free vibration problem of elasticity.

此外，将Arnoldi法应用于由边界元法得到的非对称广义特征值问题，给出了这类特征值问题有效的减缩式求解方法。

Comparing with other optimization methods, it needs few mathematical requirements, so it appropriates to deep foundation pit optimization.

与传统搜索方法相比，遗传算法对所求解的优化问题没有太多的数学要求，适用范围更广，适合于解决基坑支护优化问题。

On the mean time it is desiderated tooptimize.

同时物资调运问题也是一个亟待优化的问题，本文拟在物资调运的模型优化与求解方面作一些有益的尝试。

As for the importance of the distribution of the solutions on the Pareto front, the following measures are introduced in the dissertation: the Niching technique for keeping the genetic diversity and the real coding combining with the average crossover operator for eliminating the so-called"ending effect"of the GAs coding.

求解Pareto波阵面时，解的分布性至关重要，本文从两个角度来提高解的分布性：一是采用小生境技术解决了基因材料多样性损失问题；二是采用常规实数编码配合平均交叉算子解决了端点效应问题。

Based on a method of portioning customers, the paper first formulates the objective function, and provides and proves the low-bound of objective value; and then designs a heuristic algorithm using some known ideas of capacitated concentrator location problem, and verifies the designed algorithm to be asymptotic optimal simultaneously.

基于一种客户分组方法，首先讨论了目标函数的建立、目标值下界的构造和证明，然后借鉴通讯领域中约束集中器选址问题的一些成熟理论设计了求解所研究问题的启发式算法，同时证明了所设计算法的渐进最优性。

Contrast source inversion algorithm recasts the inversion problem as a minimization of a cost functional, thus an iterative sequence is formed to reconstruct the contrast sources and contrasts.

对比源反演算法将反演问题转化为求解成本泛函的极小值问题，从而形成重构对比源和对比度的迭代序列。

Some examples in other references are recomputed and both simulation results are compared.

通过对其它文献中仿真实例的计算和结果对比，表明该算法对求解0-1背包问题的有效性，这对差异演化算法解决其它离散问题会有些帮助。

Based on reformulating the nonlinear complementarity problem as a system of nonsmooth equations by using Fisher-Burmeister function, in this paper, by combining trust region and line search techniques, we present a smoothing method for solving general nonlinear complementarity problems.

在利用Fischer-Burmeister函数将非线性互补问题转化为非线性方程组的基础上，本文通过将信赖域方法与线性搜索方法结合起来，提出了求解一般非线性互补问题的光滑化方法。

Many questions in natural science and engineering canbe transformed into nonlinear equations to be salved,Newton iterative method is an important technique to one-and multi-dimensional variables and iterative process exhibits sensitive dependence on initial guess point.

自然科学与工程中的许多问题都可以转化为非线性方程组的求解问题，牛顿迭代法是重要的一维及多维的迭代技术，其迭代本身对初始点非常敏感。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。