studenttest.m

本文简要介绍了语音信号采集与分析的发展史以及语音信号的特征、采集与分析方法，并通过PC机录制自己的一段声音，运用Matlab进行仿真分析，最后加入噪声进行滤波处理，比较滤波前后的变化。(This paper introduces the voice signal acquisition and analysis of the history and characteristics of speech signals, sampling and analysis methods, and through a PC, record your own voice, use of Matlab simulation and analysis, and finally adding noise filtering, comparing before and after filtering change.)

各种系统辨识方法，对一阶，二阶，三阶自衡系统进行辨识。用到的方法有面积法等等……(Various system identification method, first, second, third from the value system identification. The methods used in an area of law, etc ... ...)

进行HHT的EMD分解，经验模态分解算法，(The HHT-EMD decomposition)

使用sift算法，可以完成两张图片的拼接(stich two image with sift algorithm)

谱减法语音增强的matlab程序，读入语音信号并产生随机白噪声。(Matlab spectral subtraction speech enhancement program that reads the speech signal and generates a random white noise.)

利用双线性Z变换设计巴特沃斯和切比雪夫I型IIR数字滤波器，包括低通、高通、带通、带阻四种形式。使用者只需指定通带、阻带的边缘实际频率及相应的衰减，便可输出数字滤波器 的级联形式的各子系统分子、分母的系数，并输出其幅频和相频响(Bilinear Z transform design Butterworth and Chebyshev Type I IIR digital filters, including low pass, high pass, band pass, band stop four forms. Users simply specify the passband edge frequency stopband actual and corresponding attenuation subsystems can form molecular cascade output digital filter coefficients of the denominator, and the output of its magnitude and phase frequency response)

2机5节点系统，可实现简单牛拉法，快速解耦法迭代潮流计算(2-machine 5-node system can realize simple Niula method and fast decoupling method to iterate power flow calculation)

说明：  潮流计算的matlab编程，分别试了PQ分解法，牛拉法，高斯赛德尔法(The matlab programming of power flow calculation has tried PQ decomposition method, Niula method and Gauss Seidel method respectively.)

说明：  MATLAB小波变换降噪，内附完整代码。有需要的可以下载看看。(Matlab wavelet transform denoising)

这是一个在matlab下模拟ask 和 bpsk调制和解调的代码(this is a file wirtten by Matlab, to explain the ASK and BPSK in a correctly way )