timefre

滤波程序、利用MATLAB编写，相当好用(Filtering procedure, and use MATLAB to prepare, very easy to use)

该程序能在matlab2009a下运行，运行后能够听到自己的心跳声。注意要带上耳塞并且把音量调到最大(listen to the heart beat)

说明：  这是一个信赖域方法的程序，简单实用，对初学者非常有用。(This is a trust region method procedures, simple, practical, very useful for beginners. )

IIR和FIR滤波器的设计，用脉冲响应不变法和双线性变换法设计IIR滤波器，用窗函数法设计了FIR滤波器。(IIR and FIR filter design, with the impulse response method and the bilinear transform IIR filter design using window function design of the FIR filter.)

小波包分析提取振动信号中的特征频率，仿真效率很高的，采用累计贡献率的方法。( Wavelet packet analysis to extract vibration signal characteristic frequency, High simulation efficiency, The method of cumulative contribution rat.)

小波阈值去噪，小波变换是一种信号的时间——尺度（时间——频率）分析方法，它具有多分辨分析的特点，而且在时频两域都具有表征信号局部特征的能力(Wavelet threshold denoising)

说明：  BP与GA-BP算法用于温度补偿函数拟合的比较(For the comparison of temperature compensation function fitting BP and GA-BP algorithm)

MATLAB环境下对于含平稳噪声的带噪语音利用谱相减算法进行处理，原始语音请命名为“origin.wmv"，处理后的语音为”enhanced.wmv"。rar内含有我自己做好的语音处理结果，可以用你自己的待处理语音替换它们，请放在同一目录下！(MATLAB environment containing stationary noise for Noisy Speech using spectral subtraction algorithm for processing, the original voice please named origin.wmv , after the voice for enhanced.wmv . rar contains my own voice to do a good job dealing with the results, you can use your own voice to be processed to replace them on the same directory, please!)

数字信号处理的各主要部分知识点的MAtlab实现(Digital signal processing point of the main part of the knowledge to achieve MAtlab)

计算Einstein场方程的mathematica程序包。输入变量和度规。自动计算里奇张量和曲率张量。( calculate Ricci Tensor and the Curvature Scalar)