一般方程

To solve the s-process network equation under general conditions and to create the corresponding computation code, 2.The input data base, 3. The neutron source of s-process and the neutron number density, 4. Combining the s-process heavy elements network and neutron source with the astrophysical site.

研究的内容主要是以下几个方面的问题：1、一般情况下的s－过程核反应网络方程的求解及相应计算程序的建立；2、输入数据库的建立；3、s－过程中子源问题的研究，中子数密度的计算；4、将s－过程重元素核反应网络、中子源研究与发生s－过程的天体环境结合起来。

The existence of limit cycles for nonlinear equation are discussed.

讨论了更一般非线性方程的极限环的存在性。

Empirical likelihood is a nonparametric statistical method used to construct confidence regions for multivariate means,and more generally,for parameters defined by estimating equations.

经验似然是一种非参数统计方法，用于对多元均值参数和更一般地，由估计方程定义的参数，构造置信域。

By introducing the general notion of nonwandering operator semigroup T and utilizing a basic result in normed linear space,the nonwandering property of T=e~ is investigated with the constructive method.

通过给出一般算子半群T的非游荡性概念，利用赋范空间的一个基本结果和直接的构造法证明了具有变系数的线性发展方程的强连续解半群T=etA在适当的条件下是非游荡的；另外，通过对C-半群T概念的引进，定义了一个无界算子半群etA，进一步证明了这二者关于非游荡性的联系；最后给出了一个无界算子半群etP关于非游荡性理论的刻画，其中P是微分多项式。

The main objects are graduate students, teachers and technical staff of electrical engineering with generic knowledge about Ordinary Differential Equation and neoteric mathematical theory.

本课程的主要对象是具有一般的常微分方程分支知识和一般近代数学理论知识的研究生、教师和电气工程技术人员。

The computational forms of conservative and nonconservative full—potential equations in an arbitrary non—orthogonal coordinate system have been developed by using simple and convenient mathematical derivation.

一、用简便易懂的数学推导，给出了一般曲线坐标系上守恒及非守恒型全位势方程的计算形式，对推导中引进的符号从物理上作了解释。

Thirdly, the standered SIMPLE algorithm of Patankar forsolving tWo-dAnensional elliPtic kind equations in orthogonal coo-rdinates is developed, A gerneral comPuter program for solvingequations goveming the laxninar flows and tubulent flows usingcolocated grids in orthogonal coordinates is built.

在S.V Patanker求解二维定常椭圆型方程的SIMPLE程序的基础上，加进同位网格的内容，编制了层流、紊流计算程序，用1）平行平板层流；(2）后台阶层流：（3）正方形方腔层流自然对流三种典型流动状态检验了层流同位网格SIMPLE计算程序，结果显示与一般规律及理论解吻合甚好。

Based on the wave equations established in general coordinate system for orthorhombic anisotropy media, this paper di...

在建立一般观测坐标系下正交各向异性介质波动方程的基础上，着重讨论了相应的伪谱法波场数值计算的稳定性条件，进而用伪谱法实现了正交各向异性介质弹性波场的正演模拟，获得了很好的模拟效果

This paper introduced some application of Mathematica in drawing geometrical graphics,gave a common method to get the parametric function of surface of revolution in three-dimensional space,and the Mathematica programs of several examples about the surfaces were given.

介绍了Mathematica在几种几何图形绘制中的应用，提出了获得空间旋转曲面的参数方程的一般方法，并给出了用Mathematica绘制空间旋转曲面的实例的源代码。

The operation of periodic flow reversal is a new kind of unsteady-state reaction techniques.

流向变换周期操作是一种非稳态催化反应新技术，其反应器模型一般为非线性反应－对流－扩散方程的新型定解问题。

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。