MATLAB-mathmetical-guidance

说明：  双馈风力发电系统的PSCAD仿真模型。大家学习下。(Wind PSCAD power system simulation model. We learn next.)

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) )

color image thresholding using mathematical methods like PCA

图论算法。图论算法在计算机科学中扮演着很重要的角色，它提供了对很多问题都有效的一种简单而系统的建模方式。很多问题都可以转化为图论问题，然后用图论的基本算法加以解决。本资料包含了Floyd、prim、匈牙利算法等算法(Graph algorithms. Graph algorithms in computer science plays a very important role, it provides a lot of problems for a simple and effective way of modeling the system. Many problems can be transformed into graph theory problems, and then use the basic algorithm of graph theory to solve them. This information includes Floyd, prim, the Hungarian algorithm algorithm)

verhulst模型预测代码，MATLAB代码，，，，，(Verhulst model prediction code, MATLAB code,)

说明：  用matlab采集音频，这只需要你的电脑有录音设备，适用于新的R2018a及以上版本(Use matlab to collect audio. It only needs your computer to have a recording device, which is suitable for the new r2018a and above)

matlab 地震反应谱计算 matlab 地震反应谱计算(matlab calculation of earthquake response spectrum seismic response spectrum calculation matlab)

QAM调制方式下的THP预编码程序与BPSK调制方式下基于ZF、MMSE及基于ZF、MMSE干扰消除的信号检测技术(QAM modulation coding procedures under the THP pre-BPSK modulation mode and based on ZF, MMSE, and based on ZF, MMSE interference cancellation signal detection)

不精确拉格朗日法，求解矩阵补全的凸优化问题，可以用该方法实现背景建模(Imprecise Lagrangian method for solving matrix completion convex optimization problem, you can use this method, background modeling)

在3维里面重要的就是用MATLAB模拟空间多孔介质,得到实验基础(In 3-D inside the important thing is to use MATLAB simulation of porous media space, the basic experiment)