骨架提取m文件

Principal Component Analysis

LMS算法是最被广泛应用的滤波器演算法，最大的特点就是计算量小，易于实现。(LMS algorithm is the most widely used filter algorithms, the biggest feature is the small amount of calculation, easy to implement.)

说明：  经典的MATLAB工具，一种可以解决的BP网络的实例(beautiful MATLAB things)

matlab 下高斯和瑞丽分布下QPSK信号的产生，发送和接收以及误码率分析(matlab under the Gaussian distribution, and Ruili QPSK signal generation, transmission and reception, and bit error rate analysis)

根据给定参数，设计相应的滤波器，实现滤波，并进行频谱分析，观察滤波效果。(In accordance to the given parameters, the design of the filter, to achieve filtering, and spectrum analyzer to observe the filtering effects.)

振动信号预处理，主要为五点三次平滑法和平均法(Vibration signal pre-processing, mainly for the 5.3 second smoothing method and average method)

直接扩频信号抑制正弦干扰效果，横坐标为信噪比，纵坐标为误码率(restrain of sinusoidal interference in ds_ss signal)

采用栅格对机器人的工作空间进行划分，再利用优化算法对机器人路径优化，是采用智能算法求最优路径的一个经典问题。目前，采用蚁群算法在栅格地图上进行路径优化取得比较好的效果，而利用遗传算法在栅格地图上进行路径优化在算法显得更加难以实现。 利用遗传算法处理栅格地图的机器人路径规划的难点主要包括：1保证路径不间断，2保证路径不穿过障碍。 用遗传算法解决优化问题时的步骤是固定的，就是种群初始化，选择，交叉，变异，适应度计算这样，那么下面我就说一下遗传算法求栅格地图中机器人路径规划在每个步骤的问题、难点以及解决办法。(It is a classical problem to divide the workspace of the robot by grids and optimize the path of the robot by using optimization algorithm. At present, the ant colony algorithm is used to optimize the path on the grid map, and the genetic algorithm is used to optimize the path on the grid map, which is more difficult to achieve. The difficulties of using genetic algorithm to deal with the path planning of robot on raster map mainly include: 1. guaranteeing that the path is uninterrupted, 2. guaranteeing that the path does not cross obstacles. The steps of genetic algorithm in solving optimization problems are fixed, that is, population initialization, selection, crossover, mutation, fitness calculation. Then I will talk about the problems, difficulties and solutions of genetic algorithm in each step of robot path planning in raster map.)

通信原理上机实验-基于Matlab的数字基带和频带调制系统-2ASK调制解调系统MATLAB源程序(On communication theory machine experiment- Matlab-based digital baseband and band modulation system-2ASK MATLAB source code modulation and demodulation system)

在PID控制中，微分信号的引入可改善系统的动态特性，但也易引起高频干扰。在误差扰动突变时尤其显出微分项的不足。若在控制算法中加入低通滤波器，则可使系统性能得到改善。(In PID control, the introduction of differential signal can improve the dynamic characteristics of the system, but it can also cause high-frequency interference. When error perturbations change abrupt, the deficiency of differential terms especially shows. If the low-pass filter is added to the control algorithm, the performance of the system can be improved.)