基本运算

A basic model of active magnetic regenerator was described, and the model was solved according to Lach theory adopting Mikusinski operational calculus method.

介绍了活性蓄冷器的基本模型，并对该模型采用Lach理论以Mikusinski运算积分的方法进行求解，得到了活性蓄冷器温度分布的半解析解。

Operational from the most basic unit is introduced, and MATLAB orders its use.

从最基本的运算单元出发，介绍MATLAB的命令及其用法。

The former firstly establishes state graph of power system, and then, with the use of the adjacency matrix and path matrix of the directed graph, fast finds out the key transmission sections suffering greatly from the outages of overload lines through simple calculation of matrix.

前者根据实时网络拓扑结构和潮流分布状态，在对初始电力网络简化、分区的基础上，利用有向图的邻接矩阵与路径矩阵，通过简单的矩阵运算，快速识别出与过载线路相关的关键输电断面；后者直接利用系统各支路的阻抗，从图论算法的基本思想出发，搜索最易遭受大负荷转移的关键传输路径，从而将安全性分析目标从整个网络缩小到某些关键的输电线路。

The former firstly establishes state graph of power system, and then, with the use of the adjacency matrix and path matrix of the directed graph, fast finds out the key transmission sections suffered greatly from the outages of overload lines through simple calculation of matrix. In the latter, the minimal short transmission path, the length of which is calculated with line impedance, is determined with graph theory to focus on security analysis objects from the whole network to some key transmission lines.

前者根据实时网络拓扑结构和潮流分布状态，在对初始电力网络简化、分区的基础上，利用有向图的邻接矩阵与路径矩阵，通过简单的矩阵运算，快速识别出与过载线路相关的关键输电断面；后者直接利用系统各支路的阻抗，从图论算法的基本思想出发，搜索最易遭受大负荷转移的关键传输路径，从而将安全性分析目标从整个网络缩小到某些关键的输电线路。

Perform an operation on two custom objects, the

如果是在'int'和自定义类型对象之间运算那自定义的右关联函数会覆盖原先的基本操作。

IFD Calc for Pocket PC is a calculator, that allows you to calculate basic and complicated arithmetic expressions.

通用计算器的掌上电脑是一个计算器，它可以让您的计算基本和复杂的算术运算。

It is mainly caused by Sine and Cosine functions using in polar coordinates which have non-linear character,accordingly multiply is inevitable.

这主要是因为极坐标所用到的正弦函数和余弦函数具有非线性特性，使将来运算基本单元的乘法不可避免。

This paper first analyses and summarizes the ststus quo and evolution trend of encryption, some common used cryptograph are introduced, including the algorithms used in symmetric cryptosystem and asymmetirc cryptosystem. We describe the theory of each algorithms and compare the elliptic curve cryptosystem with the other two asymmetric cryptosystems to show the advantages of this algorithm. Second, the principle of ECC is discussed, including the math foundation of ECC, basic conception of elliptic curves, constructiong idea of ECC, operation on the elliptic curve and so on. Third, the current attacks of ECC were analyzed deeply, and an algorithm based on limited prime number field was constructed. We analyzed its realizability in theory, and implement it by using certain function of MIRACL software package. Latter half in this paper, the implementation model of a simple elliptic curve encryption system which based on GF has been introduced. The paper also put a deep analysis on the algorithm of point addition and point multiplication.

本文首先对密码技术的发展现状及其发展趋势进行了分析和综述，详细的介绍了私钥密码系统和公钥密码系统的发展，说明各种算法的原理和优缺点，并给出了一些典型的密码体制的简要分析，重点将椭圆曲线算法与其它几种公钥密码算法比较，说明椭圆曲线算法的优势；其次，探讨了椭圆曲线密码体制的原理，包括椭圆曲线密码的数学基础、基本概念、椭圆曲线密码体制的构造思想等问题；第三作者对椭圆曲线的攻击现状作了详细的分析，针对所使用的大素数域F_p，设计了素数域上安全椭圆曲线产生的算法，从理论上做了可实施性分析，从软件上做了具体实现；在本文的后半部分，提出了一个简单的基于有限素数域上的椭圆曲线加密方按算实现模型，并对SECES中设计的点加和点乘运算进行了深入分析。

The space-like hypersurfaces with constant scalar curvature in a de Sitter space were studied and a pinching theorem on the square of the norm of the second fundamental form was obtained.

研究de Sitter空间中具有常数量曲率的类空超曲面，将Cheng-Yau的自共轨运算元口作用在对称张量T上，得到了这类超曲面关於第二基本形式模长平方的一个拼挤定理，加强了已有的相应结果。

In this method the transfer functions, which are the response of the temperature and thermal stress in the key parts of the special structures caused by the unit temperature load with the special loading model, are computed firstly using the detailed finite element analysis. Then both the thermal and stress responses and their sensitivities to any complex change of temperature can be obtained by the simple cirro-product integral.

该方法的基本思想是：基于一定的结构和热载荷模式，将事先通过详细有限元分析求出的单位突加热边界条件变化引起的结构控制区的温度和热应力响应作为传递函数，然后进行简单的卷积积分运算，就可以得到任意热载荷幅值变化历史所对应的温度和热应力，进而也可快速进行灵敏度分析。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。