bpsk_fading

带中文注释的主成份分析 PCA源代码在matlab的实现 (Annotated with the Chinese to achieve pca algorithm matlab)

树状网潮流程序，ＭＡＴＬＡＢ代码编写，附１９９８年文献说明(tree network trend procedures, the preparation of MATLAB code, with the literature in 1998)

选拨赛数学建模题目-网络谣言的传播模型。文件中包括题目、参考文献和matlab代码。basic.m中是最简化的模型，extend1.m中更进一步，算法中引入老年人和年轻人的活跃程度和对谣言的易信度的不同，beacons.m中再进一步引入网络警察角色来演化谣言的传播。(American Mathmetical Modeling Competition. Title:Spread of Internet Rumours.The file inclueds the title document,the reference literature and the MATLAB code.)

matlab abc/dq0/abc坐标转换，带锁相环

说明：  OFDM系统中，在没有频率偏差时，解调后的结果与原始数据一致，而存在频率偏差时，解调后的结果与原始数据差异较大，且频率偏差越大，解调结果与原始数据的差异就越大。(In OFDM system, when there is no frequency deviation, the demodulation result is consistent with the original data, while when there is frequency deviation, the demodulation result is significantly different from the original data, and the greater the frequency deviation is, the greater the difference between the demodulation result and the original data will be.)

这是一个低通抽样定理，例题中包括了低通信号的波形，抽样速率为4Hz的抽样信号，抽样序列恢复出原始信号(This is a low-pass sampling theorem, examples included in the lowpass signal waveform, the sampling rate is 4Hz sampling signal to recover the original signal sample sequence)

《高等光学仿真》第一版的matlab源程序(" Advanced optical simulation," the first edition of matlab source)

这段代码利用分步傅里叶方法求解非线性薛定谔方程的matlab程序(This code solves the NLS equation with the split-step method)

稀疏表示字典的训练方法，由压缩感知领域大神M. Elad公布的matlab工具包(matlab tools for K-SVD)

该程序用于实现图像分割中的区域生长法。共有4个参数。1，2，种子点的座标，3，图像，4，生长时用到的域值。(this code is used for region growing in the image segmentation domain.)