PCM

这是关于状态响应的两个小程序，一个是状态观测器的设计，一个是状态响应曲线的绘制。(This is about the state response of the two small programs, one state observer design, a state response curve is drawn.)

classification using KNN algorithm

MATLAB实现霍夫曼编码对英文文本的解压缩程序(MATLAB Huffman coding for the English version of decompression procedures)

典型的多项式快速傅里叶变换程序，现在只做到三阶，为初学者提供参考。(A typical polynomial fast Fourier transform program, now only do third-order, provide a reference for beginners.)

测试rastrigin 函数PSO智能算法优化程序(rastrigin PSO)

实现视频每一帧的读取，并实现视频的镜头分割(shot detection and segmetation)

基于自建数据库的音乐识别及检索软件 ； 利用Matlab开发软件, 通过抓取录入歌曲的音高(pitch tracking)绘出声音的频率变化并进行降噪和润滑（smoothing）处理 与数据库中歌曲的频率变化图比对，计算出相似度top10的歌曲并显示。 (Based on self-built of music recognition and retrieval software developed using Matlab software, change the pitch of a song by crawling entry (pitch tracking) plots the frequency of the sound and noise reduction and lubrication (smoothing) processing Frequency changes in the diagram songs than calculate the similarity top10 songs and displayed.)

Capon提出MVDR（Minimum Variance Distortionless Response）高分辩方位估计方法以来，MVDR以其简单的算法、良好的性能得到了广泛关注，是一种具有良好实用前景的数字波束形成方法。(Capon proposed MVDR (Minimum Variance Distortionless Response) high resolution DOA estimation methods since, MVDR algorithm with its easy, good performance has been widespread public concern, is a good practical prospect of digital beamforming methods.)

说明：  contour函数的使用 matlab小波降噪 全局软阈值消噪图像 无偏估计软阈值消噪图像 同态滤波 启发式软阈值消噪图像 (contour matlab wavelet noise reduction function uses the global soft-threshold denoising images unbiased soft threshold denoising images with state of the heuristic filtering images of soft threshold denoising)

基于MATLAB的CUK电路的仿真，仿真参数已经设计正确，供大家参考(Based on MATLAB CUK circuit simulation, simulation parameters have been designed correctly, for your reference)