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低比特图像压缩的 matlab实现，主要是游程编码(Matlab low bit image compression to achieve, mainly RLE)

matlab 短时傅立叶变换的实现，用于学习，采用mesh画图(Matlab short-time Fourier transform to achieve for learning, the use of mesh drawing)

计算聚类系数和读相关系数的MATLAB,希望多多指教(Calculated clustering coefficient and time correlation coefficient of MATLAB, hope great weekend)

说明：  脉冲不变法变换巴特沃思低通滤波器设计 基于matlab仿真编程(pulse unchanged France transform Butterworth low-pass filter design based on Matlab simulation programming)

一个fft的简单实现仿真的例程，画出频谱，观察信号的频谱。(An fft simple simulation routine to draw the spectrum, observed spectrum of the signal.)

matlab code for ldpc code

在无约束最优化方法中，通过选择搜索方向 k d 而得到的方法主要有四种：最 速下降法，Newton法，共轭方向法，Quasi-Newton (拟牛顿法)。 (Study on the algorithm of several nonlinear conjugate gradient method and the analysis of global convergence)

主成分分析方法在各个变量之间相关关系研究的基础上，用较少的新变量代替原来较多的变量，而且使这些较少的新变量尽可能多地保留原来较多的变量所反映的信息一种方法。(Principal Component Analysis in the relationship between the various variables on the basis of the study, with fewer new variables replace the original more variable, but made them less a new variable as much as possible to retain the original variables that reflect more information methods)

说明：  能够对于contourlet计算matlab代码，它可以有更好的波形的抵抗能力。(Matlab code to calculate the contourlet, it can have a better resistance waveform.)

实现快速傅里叶变换，线性调频Z变换，通俗易懂。(This is for students who is major in communication project.)