mtech2

1．产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，分别设计三种高通， 低通，带通滤波器对信号进行滤波处理，观察滤波后信号的频谱。 2.采集一段含有噪音的语音信号（可以录制含有噪音的信号，或者录制语音后再加进噪音信号），对其进行 采样和频谱分析，根据分析结果设计出一合适的滤波器滤除噪音信号(1. Produce a continuous signal, including low-frequency, medium frequency, high-frequency components, its sampling, spectral analysis, are designed for three high-pass, low pass, band-pass filter the signal filtering treatment to observe the signal spectrum after filtering. 2. Acquisition section of the speech signal contains noise (can record a signal containing noise, or voice recording, additional noise after the signal), its sampling and spectral analysis, based on an analysis of the results to design a suitable filter to filter out one noise signal)

这本书是matlab经典书籍，相信对许多初学者会有帮助的！(This book is the classic books matlab, I believe that many beginners would be helpful!)

根据大津法求二值化阈值的MATLAB实现，参考文献：Otsu, A Threshold Selection Method Gray-Level Histogram(MATLAB coding: A Threshold Selection Method Gray-Level Histogram)

Particle Swarm Optimization

说明：  用MATLAB做得fft谱分析，非常的好用。需要做这方面试验的，可以看看。(Fft done using MATLAB spectral analysis, very easy to use. Test needs to be done in this area, you can look at.)

仿真了6种序列，包括原序列，以及fft的结果，对比了不同N值对于fft结果的影响(Six sequence simulation, including the original sequence, and the fft results, comparing the different N values ​ ​ for fft results of)

这是一类特殊的椭圆偏微分方程Helmhotz方程。该程序是用迭代法求解Helmhotz方程的。(This is a special class of elliptic partial differential equations Helmhotz. The procedure is iterative method for solving equations Helmhotz.)

运用LBM解得一个浓度方程的小程序，非常有用！解对流扩散方程，可以直接带入自己的！(Use LBM of or concentration of a small program, very useful!Convection diffusion equation, the solution can be directly into your own!)

说明：  MFSK、OQPSK、MQAM、COFDM的simulink仿真(MFSK, OQPSK, MQAM, COFDM the simulink simulation)

dc motor speed control using fuzzy logic