gonglvpumidudefangzhan

基于matlab采用mpeg压缩原理，实现对avi格式文件的解压缩(Matlab mpeg compression used on principle, to realize the decompressor avi format)

matlab环境下建立威胁模型，规划路径，回避威胁(path plan)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一。 在各种优化算法中，共轭梯度法是非常重要的一种。其优点是所需存储量小，具有步收敛性，稳定性高，而且不需要任何外来参数(Conjugate Gradient method (Conjugate Gradient) is between the steepest descent method between Newton method and a method, it only USES a derivative information, but overcome the steepest descent method slow convergence of weakness, but also avoid the Newton law needs to storage and computing Hesse inverse matrix and shortcomings, Conjugate Gradient method is not only solve linear equations with most of the large method, and also one of the most effective solution large nonlinear optimization of one of the algorithm. In all kinds of optimization algorithm, the conjugate gradient method is very important. Its advantage is the storage capacity needed, it has small step convergence, high stability, and doesn t require any exotic parameters numerical experiment, this is the modern scientific computing of the answer above problem sets)

代码实现了汉明码译码的软判决和硬判决误码率仿真图，并且通过对比理论曲线，验证了代码的正确性。(This code achieves the BER code curve of hamming code using soft decision and hard decision. Compared with the theoretical curve,I verify the correctness of the code.)

matlab实现语音信号计算其信噪比，其中包括一个原始语音文件。(matlab，calculate the SNR of a speech)

汇集了几个经典的matlab程序，大家共同学习(A collection of several classic matlab program, we learn together)

power density estimation

数字水印中，对于水印的置乱方法：Arnold置乱，通过改变像素点的位置增强水印的鲁棒性(Digital watermark, the watermark scrambling for ways: Arnold scrambling, by changing the position of pixels increase the robustness of the watermark)

自适应lms算法源程序 自适应matlab程序(adaptive algorithm source lms adaptive procedures Matlab)

说明：  高等数学实验（胡良剑） 数学实验工具箱 (Higher mathematics experiment (Liang-sword) Math lab kit)