butterworthfilter

非负矩阵分解的一种新方法——Nesterov法，这种方法提出不久，实现的结果很不错(NMF is a new method--Nesterov method, this method is presented shortly to achieve very good results)

求出以dB为单位的给定比特信噪比的误符号率(Find the symbol error rate of a given bit signal-to-noise ratio in dB)

quaternion example and application

1.边缘检测，分别用Sobel, Laplacian-Gaussian 方法对一幅灰度图像进行边缘提 取，并给出对比结果； 2.灰度阈值分割：利用双峰法对一幅灰度图像进行灰度分割处理。(1. Edge detection, respectively Sobel, Laplacian-Gaussian methods on a gray-scale image edge extraction, and gives comparative results 2. Gray threshold segmentation: Using Twin Peaks method a gray image gray-scale be dealt with separately.)

this code implemented for ICA algorithm and can be use for face recognition

说明：  简单的移动通信系统，在awgn+瑞利衰落条件下，给出同SNR时系统性能(Simple mobile communication system)

基于MATLAB的并网逆变器双闭环控制策略仿真(Double closed loop control)

稀疏表示用，大家可以参考相关的文档来读此次程序(Sparse representation)

说明：  使用一种方法来产生一组具有不同PSD的相关高斯过程的采样值(Use a method to generate a set of different Gaussian process of PSD-related samples)

ORIGN提出异常数据，可以根据需要进行异常数据的剔除(ORIGN proposed abnormal data, can eliminate the need for abnormal data)