数值方法

To review the numerical methods of the multibody systems dynamics and applications of the symplectic methods

多体系统动力学方程数值方法的发展历程及探讨辛算法的应用

Poincaré inequalities play an important role in the research of many fields such as in harmonic analysis and in theory and numerical method of differential equations.

Poincar 不等式在调和分析、微分方程理论及其数值方法等领域的研究中具有极其重要的作用。

A numerical method is used to obtain the solutions of the mathematical model of the human thermoregulation system,and human temperature distribution and dynamic change during simultaneous exposure to heat and vibration are calculated.

采用数值方法对人体热调节系统数学模型进行求解，计算了不同热和振动复合环境条件下人体温度分布及动态响应，计算结果与实验结果相符较好，相对误差小于5％。

Based on the enumeration of the significant fatigue failure modes of structure system and one-sided tolerance factor, an algorithm for predicting fatigue life of complex structure system is presented.

借助单侧容限系数法和对数准则，提出了一种预测大型复杂结构系统安全疲劳寿命的数值方法。

After introducing the line tension contribution to the total Helfrich curvature energy, the axisymmetrical shape equation and the corresponding boundary conditions are obtained in the case of vesicle with one hole.

在得到关于开口泡的形状方程与相应的边界条件之后，本文进一步用数值方法求解了该微分方程。

The transformation of coordinates,interactive model,and numerical methods were introduced for the dynamic analyses of deep groove ball bearings.

根据空间坐标变换建立接触和碰撞模型，利用数值方法计算分析，编写了适用于深沟球轴承的拟静力学以及动力学分析的软件包BA。

In the process of time march, the evolution of the wave contour maps for unsteady state is totally difference with the steady state.

通过对定常和非定常两种数值方法的收敛过程的比较发现两者波面的变化过程完全不同。

Vector algebra in 3D, vector- valued functions, gradient, divergence and curl, Taylor series, numerical methods and applications.

三维向量代数、向量值函数、梯度、散度和旋度、泰勒级数、数值方法和应用。

All these show that the present method can be used to analyze the complex viscous flow phenomena in turbomachines.

计算结果表明，本数值方法和程序计算稳定，收敛速度快，计算结果与实验值基本一致，可以用来模拟叶轮机械内的粘性流动现象。

A numerical method based on chimera technique has been developed to simulate the viscous flow past a helicopter r...

本文发展了一种基于嵌套网格的计算绕直升机旋翼粘性流动的数值方法。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐