dijistra

说明：  图像的置乱加密和解密算法，需要输入加密密钥进行加密，然后只能输入相同的解密密钥才能得到原图像(Image scrambling encryption and decryption algorithms, need to enter the encryption key to encrypt, then enter the same decryption key only to get the original image)

Neural Predictive Control using Quasi Newton Optimization

模仿微信打飞机 的Demo 无bug 希望大家一起学习

matlab code about kalman filter

刘金锟老师的先进PID控制及其matlab仿真第二版程序(Liu Kun, a teacher of advanced PID control and its procedures for the second edition of matlab simulation)

说明：  】利用混沌动力学系统中logistic 映射先对水印图像进行置乱预处理以增强其鲁棒性, 在小波域中将原始音频信号按比例分段, 此比例为原始音频信号低频部分与水印信号个数之比, 然后将水印信号加入到音频信号的 低频部分。用StirMark 攻击后的实验结果表明, 该算法对StirMark 的部分攻击具有一定的鲁棒性。(The logistic- map sequences to encrypt the watermark are used. The original audio signal in DWT (Discrete Wavelet Transform) domain is seperated into some pieces determined by the ratio between the length of the low frequency parts and the length of the encrypted watermark. Every bit of the watermark is added into the relevant pieces of the low frequency parts in the DWT domain. Experimental results show that the algorithm is robust against some StirMark attacks.)

通过迭代法计算方同轴线的电势分布，进而求得内导体电流，最终计算出同轴线的阻抗(Iterative method to calculate the square coaxial electric potential distribution, and thus obtain the inner conductor current, the final calculation of the impedance of the coaxial)

Clarke模型的提出代表了Rayleigh分布用于平坦小尺度衰落统计模型的开端。虽然因为其实现比较复杂，而更倾向于被认为是一种数学模型而非仿真模型，但所涉及到的Rayleigh衰落信道的概念是其后众多改进模型的基础(The Clarke model put forward on behalf of the beginning of the Rayleigh distribution for flat small-scale fading statistical model. Because its implementation is more complex, and more inclined to think that instead of the simulation model is a mathematical model, but involved in the Rayleigh fading channel concept is the basis of many subsequent improvement model)

无约束优化,基于黄金分割的最速下降法极小化函数(Unconstrained optimization, based on the steepest descent method minimization function)

LMS adaptive fulter in matlab. for remove echo in telecomunication