banbubianliangfa

软阈值去噪程序。噪声为高斯白噪声，采用软阈值去噪算法可保证信号的能量。(noise)

document contenant un projet sur la compression audio par ondelettes et son code matlab

三相异步电机反转，matlab仿真，希望大家支持(Three-phase asynchronous motor reversal, matlab simulation, hope you will support the)

基本电路，用于实现低通滤波器，可以仿真波形。(failed to translate)

qpsk下在多径瑞丽衰落信道的传输特性，有效果很好的误码率和信噪比曲线(The transmission characteristics of multipath Rayleigh fading channel under QPSK are effective, with good BER and SNR curves.)

这是一份MATLAB基础课件，由于我也是初学者，这部课件讲的很浅显，但比较适合初学者对MATLAB所有功能的一个初步了解内容包括涵数值数组及其运算， M文件和面向对象编成， 字符串数组， 符号变量， matlab 绘图 及 Simulnk动态仿真。以及两个基本浅显的程序题。此为第 2章。(This is a basic MATLAB courseware, because I am also a beginner, this software is very simple-speaking, but more suitable for beginners of all the features of MATLAB, a preliminary understanding of the content including the Han and its numerical array computing, M documents and for object into string array, variable symbols, matlab graphics and dynamic simulation Simulnk. As well as the two basic procedures for simple questions.)

系统辨识，通过输入PRBS，由3种模型，输出进行比较，从而辨识各个类别的系统(System identification, through the input PRBS, by three kinds of model outputs are compared to identify the various types of system)

带端点延拓的EMD的matlab程序，可抑制端点效应(With the endpoint extension EMD Matlab procedures, can restrain end effect)

小波变换进行变速箱故障诊断 首先将s1和s2信号时域谱（s1代表维修前的振动信号，s2代表维修后的振动信号），画出来进行对比，会发现s1信号的振动幅值会比较高；然后对s1和s2分别进行小波分解并画出各层的时域谱，只对比s1和s2分后的最高时域谱，s2更加的具有周期性，且幅值较小，s2周期性不够明显，且振动过于密集。分析完时域谱后开始分析频谱，首先对原信号s1和s2fft转换，得到频谱图，如图，然后再对小波分析后高频部分进行fft转换，做出频谱图。对比后我们发现，在f 2375HZ出（也就是齿轮的啮合频率），s1信号频谱幅值会有急剧的升高，然后，其谐波的幅值也会增大。所以可以推断出该维修前的增速箱的齿轮可能出现问题。(Gearbox fault diagnosis based on wavelet transform s1 and s2 first time domain signal spectrum (s1 behalf of the vibration signal before maintenance, vibration signal s2 representative of repaired), drawn comparison, you will find a signal s1 vibration amplitude will be higher then s1 and s2 respectively wavelet decomposition and draw the layers of time-domain spectrum to only a maximum time domain spectroscopy s1 and s2 points after, s2 is more cyclical and smaller magnitude, s2 cyclical enough obviously, and the vibration is too dense. End domain spectral analysis after the beginning of the spectrum analysis, the first of the original signal s1 and s2fft conversion to give the spectrum, as shown, and then after the high frequency part of wavelet analysis fft transformation to make spectrum. We found that after the comparison, at f 2375HZ out (i.e. the gear mesh frequency), there will be a sharp increase in the amplitude spectrum of the signal s1, and then, the amplitude of the ha)

对MATLAB环境下的迭代算法实现进行了讲述，对熟悉Matlab软件的人有帮助(The MATLAB environment iterative algorithm has been talk, for people who are familiar with Matlab software to help)