data_analysis

M=512 原图像长度 N=64 K=8 I=zeros(M,M) J=zeros(N,N) BLOCK=zeros(K,K) 显示原图像 I=imread( f:ceshiyuanshitu.bmp ) figure imshow(I) xlabel( 原始图像 ) 显示水印图像 J=imread( f:ceshilogistic_nuaa64.bmp ) figure imshow(J) xlabel( 水印图像 ) 嵌入水印 tem=1 for p=1:N for q=1:N x=(p-1)*K+1 y=(q-1)*K+1 BLOCK=I(x:x+K-1,y:y+K-1) BLOCK=dct2(BLOCK) if J(p,q)==0 a=-1 else a=1 end BLOCK(2,1)=BLOCK(2,1)*(1+a*0.01) BLOCK=idct2(BLOCK) I(x:x+K-1,y:y+K-1)=BLOCK end end 显示嵌入水印后的图像 figure imshow(I) xlabel( 嵌入水印后的图像 ) imwrite(I, f:ceshiembedded.bmp )

常微分方程的数值解法 包括RUNGE-KUTTA方法 Adams预估——校正算法 和MATLAB自带的ODE45解法(Numerical solution of ordinary differential equations including the method of Adams RUNGE-KUTTA predictor- corrector algorithm and ODE45)

load flow study using gauss siedel method

异步电机转子磁场定向控制仿真模型，通过验证，好用!(FOC induction motor simulation models, easy to use!)

program which reads a TABLE file of N points in M dimensions, in the unit hypercube, and returns estimates of the quality of the point dispersion

power_svpwm_multiPhasesLevel_sfun.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_svpwm_multiPhasesLevel_sfun.rar, Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

一个多径信道仿真程序。其主程序为： Jakes_filter.m 产生信道多普勒功率谱形状 linear_fft.m作fft变换，并作相应平移。 linear_psd.m分析信号的psd qpsk_berest.m产生qpsk信号 random_binary产生随机信号源(a multi-path channel simulation program. Its main program : Jakes_filter.m have access Doppler power spectral shape linear_fft.m for f ft transform, and for the corresponding translation. Linear_psd.m analysis of the signals generated psd qpsk_berest.m letter qpsk No. random_binary generated random signal source)

三自由度系统的自由响应.wilson-theta和Newmark-beta求解动力学振动方程( Three degrees of freedom the system free response. Wilson-theta and the Newmark-beta dynamics vibration equation solving)

卫星运动学和姿态动力学模型，采用Matlab的S-function来创建模型，可以方便更改参数(Satellite kinematics and attitude dynamics model using Matlab S-function to create the model, you can easily change the parameters)

matlab算法中比较常用的求最短路的Dijkstra算法。(matlab algorithm for the most commonly used short Dijkstra algorithm.)