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这是一个关于 matlab 的 打开和写入的简单程序(This is an open matlab and write about the simple procedure)

说明：  电力系统潮流的计算机辅助分析 本课题要求对一14节点的电力系统分别使用MATLAB和PSASP软件进行潮流计算及分析，其具体要求如下： 1）用MATLAB实现对该系统的潮流计算。需要MATLAB语言编制程序形成节点导纳矩阵、形成雅克比矩阵、用高斯消去法解修正方程式，并编写输出程序用以输出节点导纳矩阵、节点电压（包括电压的相角和幅值）、以及各支路的首端功率、末端功率和功率损耗，然后调式并在MATLAB运行环境下运行程序输出结果，再将结果制成表格。(Computer Aided Analysis of Power Flow)

经典leach算法,是学习leach最好的算法，有详尽的代码注释。(classical algorithm of leach)

绘制庞加莱截面图的程序。先通过solveLor.m来求出一系列点，然后代入Poincare_section 程序绘制庞加莱截面。 通过观察Poincare截面上截点的情况可以判断 是否发生混沌：当Poincare截面上有且只有一个不动点或少数离散点时，运动是周期的；当Poincare截面上是一封闭曲线时，运动是准周期的 当Poincare截面上是一些成片的具有分形结构的密集点时，运动便是混沌。 (Poincare section drawing program. First obtained by solveLor.m to a series of points, and then drawn into the program Poincare Poincare section. By observing the situation on the Poincare section cut points can determine whether chaos occurs: When there is only one fixed point or a few discrete points on the Poincare section, the motion is periodic When is a closed curve on the Poincare section, the motion is quasi- When is the point of having a dense fractal structure on some stretches of the Poincare section, the motion is chaotic period.)

关于脑电信号处理，的一个类似于eeglab的应用包，可在matlab上直接使用(About EEG signal processing, a similar eeglab application package, can be used directly on the MATLAB)

this matlab code describes OFDM(orthogonal frquency division multiplexing) transmitter

这是一类特殊的椭圆偏微分方程Helmhotz方程。该程序是用迭代法求解Helmhotz方程的。(This is a special class of elliptic partial differential equations Helmhotz. The procedure is iterative method for solving equations Helmhotz.)

非常简单的卡尔曼滤波程序，便于大家学习卡尔曼滤波。(Very simple Kalman filtering program, easy to learn the Kalman filter.)

double side band modulation code

数学建模中常用的图论程序，经整理，有注释(Commonly used mathematical modeling of graph theory program, collated, annotated)