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混沌演示——数据加密的动态过程以及结果展示(Chaos demo- data encryption as well as the results demonstrate the dynamic process)

基于瞬时无功ip-iq理论的有源电力滤波器的模型！(active power filter)

Jacobi矩阵一般是坐标变换时用的——这个坐标系的坐标依次对那个坐标系的坐标求偏导数即得Jacobi矩阵。积分时从直角坐标变到球坐标、极坐标肯定要在积分号里乘上Jacobi矩阵的行列式。 若其特征值全为正，则此Jacobi矩阵正定，即它的任何二次型都大于零。并且如果是对称Jacobi矩阵，还可以实相合于一个单位阵。是比较强的条件。矩阵A的特征值是这个关于x的方程的所有根 det(A-xI)=0(Jacobi)

MPC CONTROLLER LOGARITHMS

数字水印技术是近年来图像保护技术研究领域的一个热点,本文提出了一种基于小波变换的图像数字水印嵌入算法的Matlab实现。实验结果表明,该算法具有较好的视觉效果和透明性。 (Abstract　The digital watermarking technology is the most active topic in image protecting recently.In this paper, a digital watermarking algorithm based on Wavelet transform is proposed,and give ou the program of this algorithm by MatLab.The experimental results demonstrate that the method possess good vision effect and transparence. Keywords　Image protecting　Wavelet transform　Digital　Watermarking　Matlab )

说明：  原理：以待处理的像素作为中心，取一个nXn的模板，在模板中选择k个与待处理像素的值最接近的像素，将这k个像素的均值替换原来的像素值。 假设n=3，k=5，调用方法：b = KNNMeanFilter(a, 3, 5)(Principle: to be treated as the center pixel, take a nXn template select the template and the pending k-nearest pixel values of pixels, this k pixels mean replacing the original pixel value. Assuming n = 3, k = 5, call the method: b = KNNMeanFilter (a, 3, 5))

说明：  实现PSK调制的详细过程，对学习很有帮助，必须顶(PSK modulation to achieve the detailed process, helpful for learning to be top)

Crystal diode modelling (matlab7+simulink)

xs128 SPI 控制数码管 串行通信(the xs128 SPI control digital tube serial communication)

图像的编解码程序，可以直接运行，并含有PSNR的对比(The encoding and decoding files which can run without modify, and we have comparison of PSNR)