Use of a Jacobi iteration Roots of C++ source code

NEC2c 是一个翻译的数值电磁学代码 (NEC2) 从 FORTRAN 到 c。它使用三个条款 （正弦、 余弦和常数） 来表示当前函数和应用方法，解决三维天线问题的时刻。NEC2c 提供细丝和曲面建模并可以在 NEC2c 中指定的地平面 （完美/不完美） 影响。然而，当前 NEC2c 不允许天线在地面下放置和字段计算也是限于只可用空间。通过将功能添加到 somnec.c 的代码，可以埋和架空电线的花费问题。为源和评价点之间的大距离，该字段被解决使用诺顿公式虽然索末菲一体化执行与小距离。

这是一个关于BP神经网络的程序，对初学者有一定的帮助。-This is a study on BP neural network procedures, these will certainly help beginners.

k-means 算法的工作过程说明如下：首先从n个数据对象任意选择 k 个对象作为初始聚类中心；而对于所剩下其它对象，则根据它们与这些聚类中心的相似度（距离），分别将它们分配给与其最相似的（聚类中心所代表的）聚类；然后再计算每个所获新聚类的聚类中心（该聚类中所有对象的均值）；不断重复这一过程直到标准测度函数开始收敛为止。-k-means algorithm process as follows: First of all, the object data from the n choose k object as initial cluster centers and the remaining for the other object, then according to their cluster center with those of the similarity (distance) respectively assigned to them with the most similar (represented by cluster center) clustering obtained and then calculated for each new cluster center clustering (all objects in the cluster mean) repeated this process until the standard measure of function until the beginning of convergence.

Pt100传感器计算工具，输入温度值，如100℃，则能计算出相应的Pt100阻值。 

应用背景This application is to focus on the numerical methods in Computational Fluid Mechanics, dealing with aeronautics, hydraulics, heat and mass transfer etc. We konw fluids have the ability to transport matter and its propertities as well as transmit force, therefore fluid mechanics is a subject that is particularly open to cross fertilization with other sciences and disciplines of engineering. The subject of fluid mechanics will be highly relevant in domains such as chemical,metallurgical, biological and ecological engineering.关键技术 SIMPLE (Semi-Implicit Method for Pressure Linked Equations) algrithm is the principal numerical method to numerical simulate incompressible fluid flow, it can remove the difficults of fake pressure disturbance and neglecting specific pressure equation for incompressible fluid flow successful. The main thoughts and steps of SIMPLE algorithm are given in this application. The single-phase loc

aes算法c(c++)_支持128、192和256位密钥 实现一个C++的AES算法类，可直接调用

外推法解微分方程组，并给出实例。外推法首先给丁初始补偿，软件自动决定下一步的步长-Extrapolation solution differential equations, and gives examples. First, extrapolation to the small initial compensation, the software automatically decide on the next step of

在VC 6.0环境下实现，利用A*和小根堆算法来实现寻路，可设置起点与终点，设置简单迷宫。代码的注释详细，且使用代码简单，初学者也能看懂，能够了解A*的基础

电话仿真系统 主要用在计算机仿真课上 可能有错误！-telephone simulation system used mainly in computer simulation class may be wrong!