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做出数据的图谱，并用归一化、傅里叶变换进行藻种识别(photo the data,and then normalize the data and then identify them.)

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1. 构造含噪音的振动信号 faultysignal_with_noise， 2. 利用小波变换 Wavelet transform去噪，小波包 Wavelet packet transform 变换去噪， 3. 把两种去噪后的信号，分别用STFT ,FFT ,小波变换三种方法进行错误诊断(1. the vibration signal faultysignal_with_noise, which contains noise, is constructed. 2. using wavelet transform Wavelet transform denoising, wavelet packet Wavelet packet transform transform de-noising, 3. the two kinds of denoising signals are diagnosed by three methods, STFT, FFT and wavelet transform respectively.)

《MATLAB时尚百例实例》实例1-13()

傅里叶分解，包含偶数次谐波，是一个matlab的M文件(Fourier decomposition, contain even-numbered harmonics.Is an M-file matlab)

基于非负矩阵分解（NMF）的人脸特征提取算法，其基本思想是找到一个母性子空间，是的构成子空间的基图像的像素点都是正值(algorithm of NMF of face detection by matlab)

说明：  EEMD的工具箱，包括EEMD分解，希尔伯特变换等，以及一系列EEMD相关的程序(EEMD toolbox, including EEMD decomposition, Hilbert transformation, and a series of EEMD related programs)

matlab 工程数学应用——许波，刘征编著(Applied Engineering Mathematics matlab)

说明：  maltab 图像处理中对ed算法的增强算法(maltab image processing algorithms in the enhancement algorithm on the ed)

基于PWM调制的并网逆变器matlab仿真模型(matlab model)