OBSUP

采样频率 fs=10000 轴承外环故障信号 fid=fopen( bearingout.dat , r ) 故障 N=1024 xdata=fread(fid,N, int16 ) fclose(fid) xdata=(xdata-mean(xdata))/std(xdata,1) 时域波形 figure(1) plot(1:N,xdata) xlabel( 时间 t/n ) ylabel( 电压 V/v ) db10小波进行4层分解 一维小波分解 [c,l] = wavedec(xdata,4, db10 ) 重构第1～4层细节信号 d4 = wrcoef( d ,c,l, db10 ,4) d3 = wrcoef( d ,c,l, db10 ,3) d2 = wrcoef( d ,c,l, db10 ,2) d1 = wrcoef( d ,c,l, db10 ,1) ( Sampling frequency fs = 10000 bearing outer ring fault signal fid = fopen (' bearingout.dat' , ' r' ) failure N = 1024 xdata = fread (fid, N, ' int16' ) fclose (fid ) xdata = (xdata-mean (xdata))/std (xdata, 1) time-domain waveform figure (1) plot (1: N, xdata) xlabel (' Time t/n' ) ylabel ( ' voltage V/v' ) db10 wavelet decomposition 4 layer one-dimensional wavelet decomposition [c, l] = wavedec (xdata, 4, ' db10' ) 1 ~ 4 reconstructed detail signal d4 = wrcoef (' d' , c, l, ' db10' , 4) d3 = wrcoef (' d' , c, l, ' db10' , 3) d2 = wrcoef (' d' , c, l, ' db10' , 2) d1 = wrcoef (' d' , c, l, ' db10' , 1) )

遗传算法，非常经典，大家相互交流，大家有好的程序源代码也上传啊(Genetic algorithm (ga), very classic, we communicate with each other, everyone has a good program source code also uploaded)

四元数Hartley仿射变换。对研究四元数Hartley仿射变换的不变性有帮助(quaternion hartley affine transform～～)

对EMD分解方法每一步的结果展示，包括求包络线、取平均值、减平均值后再求包络线，最后得IMF分量(EMD decomposition results for each step of the show, including seeking envelope, averaged, and then find the average value minus the envelope, and finally get IMF component)

matlab实现rnn神经网络，对于使用的现场臭氧发生器数据，进行数据建模仿真，用现场数据对神经网络进行训练并得到参数(use matlab finish rnn)

利用LSB算法去实现了电子水印技术。代码完全实现了嵌入以及提取， 算法同时包含了4种攻击算法以及利用psnr测量提取的水印和攻击后提取的水印(This algorithm describes digital watermark technique by using LSB. This code implement embedding and extraction. At the meanwhile, this algorithm includes 4 different kinds of attacks and in the end, measure psnr between extracted watermark and attacked extracted watermark)

说明：  很多matlab的源代码，非常适用于初学者哦！请同行多多指教！(many Matlab source code is very applicable to beginners! Please peer great weekend!)

全向的标定算法，matlab写的，文件比较多。(The calibration of omni-directional algorithm, matlab written)

MATLAB 6.5 的教科书，对应上传的6.5代码学习。从基础讲解其功能，语法，运算函数，图像处理，等，经典的学习材料，并且用MATLAB 写的源代码(textbooks corresponds to the 6.5 code upload learning. From the foundation to explain its function, grammar, arithmetic function, image processing, etc., classical learning materials MATLAB and write source code)

ECG的应用，ECG在医疗检测方面发挥着中重要作用，所以，心电信号至关重要(With the application of ECG, ECG plays an important role in medical detection, so ECG signal is very important.)