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My code is implementation of classic snakes, according to the article of Active contour model. I m making reduction of external curve to the center which searching for extremum (the strongest intensity gradient of edge).

分析chirp信号的改进fft算法，该FrFT算法是从matlab论坛中的算法，尝试后可用(Improved FFT algorithm for analyzing chirp signals)

factorizacion de una matriz por gram schmidt

在这本实用的指导书帮助下你立即就可使用MATLAB了。《MATLAB揭秘》为学习这种功能强大的数学计算工具提供了高效的、启发性的方法。 本书使用简单易行的风格，一开始介绍了MATLAB基础，你将学习到如何绘制图象，求解代数方程及计算积分，也将学习到如何求解微分方程，求ODE的数值解，使用特殊函数工作。本书含有几百个例子及其详细解说过程，章末带有习题，书末还带最终测试题目，一句话，本书给予你的是MATLAB精华。 本自学指导书提供了： 上手MATLAB的最快方法 几百个带有解答过程的工作实例 覆盖了MATLAB7 每章章末配有习题，提高学习质量，查漏补缺。 书末附有最终测试题 为学习和工作节省时间提高效率(for this book s help,you can use the matlab.)

一个可以直接应用于扩频系统的m序列仿真，m序列具有很好的自相关性，是在扩频系统中应用最广的伪随机码，本程序可以直接在matlab上运行，对于扩频系统的学习有很大帮助。(Can be directly applied to a m-sequence spread spectrum system simulation, m sequences with good autocorrelation in the spread spectrum system, the most widely used pseudo-random code, the program can be run directly in matlab for Spread Spectrum Systems of great help in learning.)

source code identification using matlab

说明：  提供了在Matlab中如何进行流场的动态模拟.通过这个是提供给想用Matlab作动态模拟的人一个思路(Matlab provides the flow field in how to carry out the dynamic simulation. Through this is to provide to want to use Matlab for dynamic simulation of a thinking person)

introduction to various data class and its application in various domain

从txt文件中获取数据，然后用四边算法处理，其中涉及matlab文件和mathematica文件(Txt file to get the data, and then use the four sides of the algorithm processing, which involves matlab file and mathematica file)

非平衡数据集的分类问题经常出现在许多实际应用中.支持向量机在处理这一类问题时,整体分类性能比较低.为此,Veropoulos提出的采用不同惩罚系数的改进算法可以较好的解决此类问题.此外,可以利用序列最小优化算法简单快速的解决上述优化问题.(Non-equilibrium data sets classification problems often appear in many practical applications. Support Vector Machine in dealing with this type of issue, the overall classification performance is relatively low. To this end, Veropoulos proposed punishment coefficient using different algorithms can improve the better solution such issues. In addition, can use the Sequential Minimal Optimization algorithm is simple and fast solution to the above optimization problem.)