问题的

Take the method of "subarea" and "conjunction" to segment the whole request model to three parts. Making use of boundary continuousness between medium and lining structure at stress and displacement, construct a wave function that can satisfy the stress boundary condition at horizontal surface by the scattering of SH-waves in circular part. And then, availing of the wave function, conjoin the circular part into the semi-circular hollow space at common boundary. The problem can be reduced to solve the question that can only meet the condition of "conjunction". Finally, the solution of the problem can be summarized to a series of algebraic equations and solved numerically by truncating the finite terms of the infinite algebraic equations.

采用"分区"与"契合"的方法，将整个求解区域分割成三部分，利用介质与衬砌结构在边界上的应力、位移的连续性，构造一个可以自动满足水平界面上应力边界条件的圆域对SH波散射的波函数；再利用这一波函数将圆域与半圆形凹陷半空间的"公共边界"进行"契合"，将问题简化成对一个只需满足'契合'边界条件的散射问题的求解；最终归结为对一组无穷代数方程组的求解问题，利用截断有限项的方法对其进行计算。

It can be solved in O(n 2) time for single convex polyhedron obstacle (here n is the total number of vertices of polyhedron).

文章主要研究了k＝ 2情形下的最短路问题，提出一个在O（n2）时间内解决该问题的算法。

State variables at left end of time interval and costate at right end of time interval were taken as independent mixed variables, and the state and costate variables inside the time interval were approximated by Lagrange interpolation. Nonlinear optimal control problems were replaced by nonlinear equations through dual variable principle, and the symplectic algorithm for solving nonlinear optimal control problems can be obtained at the same time.

以时间区段一端状态和另一端协态作为混合独立变量，在时间区段内采用拉格朗日插值近似状态变量与协态变量，然后利用对偶变量变分原理并将非线性最优控制问题转化为非线性方程组的求解，最终得到求解非线性动力学系统最优控制问题的保辛数值方法。

State variables at left end of time interval and costate at right end of time interval were taken as independent mixed variables,and the state and costate variables inside the time interval were approximated by Lagrange interpolation.

以时间区段一端状态和另一端协态作为混合独立变量，在时间区段内采用拉格朗日插值近似状态变量与协态变量，然后利用对偶变量变分原理并将非线性最优控制问题转化为非线性方程组的求解，最终得到求解非线性动力学系统最优控制问题的保辛数值方法。

In this paper, under the guide of modern pedagogy, psychology and mathematical education theory, the cause for the problem and countermove were discussed and studied.

在数学学习中，她们存在的主要问题是课堂听课质量不高、数学阅读有障碍及综合解决问题的能力较差。

This kind of coupled problem was more difficult to deal with than the general.

这样一种耦合的问题加大了解决问题的难度。

As an example, the ANOVA model with covariant variables is considered. The generalized p-value of this model is given, and then the critical region is proposed.

作为例子，又考虑了具有协变量的ANOVA模型中等均值假设检验问题，给出了其检验问题的广义p-值。

With aggravation of global environmental problems, environmental migration has been a critical issue for many state governments and the whole world.

随着全球环境问题的加剧，环境移民问题正日益受到世界各国政府和国际社会的高度重视。

The problem of digital copyright protection is taken into account by more and more people. Cryptographical technology is one of the key solutions to this problem.

数字版权保护问题越来越受到人们的重视，密码技术是解决这一问题的关键技术之一。

Students must be cultivated to develop the ability to analyze and solve problems.

必须培养学生分析问题的能力和解决问题的能力。

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。