FTCS_implicit

压缩感知中一种测量方法。介绍如何构造测量矩阵。(Compression in a perceptual measurement method. Introduce how to construct measurement matrix.)

Rosenbrock函数优化属于无约束函数优化问题，其全局极小值位于一条平滑而狭长的抛物线形状的山谷底部，且为优化算法提供的信息很少，因此找到其全局极小值就显得很困难。根据Rosenbrock函数的这种特性，专门提出了一种改进的PSO算法，该算法引入三角函数因子，利用三角函数具有的周期振荡性，使每个粒子获得较强的振荡性，扩大每个粒子的搜索空间，引导粒子向全局极小值附近靠近，避免算法过早地收敛，陷入局部最优，从而找到Rosenbrock函数的全局极小值。大量实验结果表明，该算法具有很好的优化性能，为某些领域某些特定的类似于Rosenbrock函数的优化问题提供了一种新的思路。(Rosenbrock function optimization functions are unconstrained optimization problems, its global minimum value at a smooth parabolic shape and narrow mountain valley Department, and for the optimization algorithm provides little information, and therefore find its global minimum value becomes very difficult. According to this feature Rosenbrock function, specifically mentioning Out an improved PSO algorithm (PSO-R), the algorithm introduced trigonometric factor, using trigonometric has periodic oscillations, so that each particle to obtain more Strong oscillations of expanding the search space of each particle, the particle is close to nearby guide global minimum, avoiding premature convergence algorithm, into a local optimum, thus Finding the global minimum Rosenbrock function. Experimental results show that the algorithm has a good optimizing performance, similar to some certain areas Rosenbrock function in the optimization problem provides a new way of thinking.)

对图像分割，初始轮廓为椭圆。变化的过程中始终以椭圆为约束(For image segmentation, the initial contour is an ellipse.)

this code is for EMD decomposition

Welch功率谱密度是用改进的平均周期图法来求取随机信号的功率谱密度估计值。Welch法采用信号重叠分段、加窗函数和FFT算法等计算一个信号序列的自功率谱估计(PSD如上例中的下半部分的求法)和两个信号序列的互功率谱估计（CSD）。MATLAB信号处理工具箱函数提供了专门的函数PSD和CSD自动实现Welch法估计，而不需要自己编程。(method of power spectral density plot )

Code maade decision for n files in which format is better save image into folder

MATLAB程序设计之图形huffman编码源程序MATLAB programming source code for pattern huffman coding(MATLAB programming of graphics huffman coding source MATLAB programming source code for pattern huffman coding)

配网潮流计算 针对33节点 可以使用 牛顿拉夫逊法(Distribution network for 33 nodes can flow calculation using Newton Raphson)

matlab/simulink对永磁同步电动机的电流滞环控制仿真，可以直接运行，适合电机控制初学者学习使用。(matlab/simulink current permanent magnet synchronous motor closed-loop control simulation can be run directly, for beginners learning to use motor control.)

说明：  关于matlab数字图像处理算法的实验原理及其报告(Matlab digital image processing algorithms on the experimental principle and the report)