noiseestimation

说明：  双音频按键识别 背景： 打电话拨号时，每次按键会发出不同的声音，这些声音实际上是由一些固定频率的正弦信号合成的。因为每个按键声音包含两个不同频率的正弦信号，因此也被称为“双音频”信号，简记为DTMF。这相当于是对不同键位用‘音频’进行了编码，如同计算机领域中用数字0和1对处理对象（包括键盘）进行编码。(Two-tone buttons identify Background: When you call dial, each key emits different sounds, which is actually made up of some fixed frequency sinusoidal signal synthesis. Because the sound of each key contains two sinusoidal signals of different frequencies, it is also known as &quot two-tone&quot signal, abbreviated as DTMF. This is equivalent to different keys using the ' audio' encoded, as the computer industry with the numbers 0 and 1 pair of processing object (including the keyboard) to be encoded.)

idft using dit fft of the sequence and comparing using ifft function

说明：  蔡氏电路的matlab仿真图，为初学混沌的朋友作参考(Matlab simulation of Chua' s circuit diagram, a friend of chaos for the beginner reference)

基本的直流微电网下垂控制，可以实现在孤岛运行模式下的电压-功率控制(DC Droop control)

经典FDTD程序Taflove书随书光盘源代码,适合于matlab初学者(classic FDTD program source code in CD-ROM of a Taflove book，suitabal for beginners in matlab)

A code on Kohonen NN that works with an arbitrary 3D data in a file with a name data.txt

This file is fast background subtraction file

get video from camera in simulink

描述对数距离/正态阴影衰落路径损耗模型的MATLAB程序(A description of the number of distance/normal shadow fading MATLAB program path loss model)

CVX的使用方法 它是一种很有用的MATLAB工具(CVX to use it is a very useful tool for MATLAB)