min_pv

利用matlab，对语音信号进行端点检测和修剪(Speech endpoint trimming)

operating systems introduction what operating systems do computer-system organization computer-system structure computer-system architecture

该代码用于提取haar-like特征，效果比较好，可以直接运行(This code is used to extract haar-like features, the effect is good, you can run directly)

说明：  多边形平板高频散射,采用物理光学发求解多边形平板的雷达散射截面(Polygonal planar high frequency scattering, Using physical optics to solve the radar cross section of a polygonal flat plate)

说明：  数值模拟波浪力，根据莫里森方程，求单一深度波浪力数值模拟的matlab语言程序(Numerical simulation of wave forces)

说明：  实现异步电机无速度传感器控制，应用滑模观测器(The asynchronous motor is controlled without speed sensor and sliding-mode observer is applied)

Ac to dc converter allow the conversion of the continouis input current or voltage to alternative ouput current or voltage

本文件中包含了很多在通信基本原理中常用的源程序，像各种调制方式，交织方式，编码方式都有很详尽的源程序。非常经典！(this document contains many of the basic principles of communication common source, like various modulation, intertwined, encoding great detail of the source. Very classic!)

梁单元总体刚度矩阵组装matlab源程序(The beam element stiffness matrix of MATLAB general assembly source program)

说明：  针对一般的粒子群优化(PSO)学习算法中存在的容易陷入局部最优和搜索精度不高的缺点,对改进型PSO算法进行研究。由于惯性权重系数ω对算法是否会陷入局部最优起到关键的作用,因此,通过改变惯性权重ω的选择,对惯性权重系数采取线性减小的方法,引入改进型的PSO算法。采用改进的PSO算法对PID控制器进行参数优化并把得到的最优参数应用于控制系统中进行仿真。仿真实验结果表明:改进型PSO算法不会陷入局部最优,能得到全局最优的PID控制器的参数,并使得控制系统的性能指标达到最优,控制系统具有较好的鲁棒性。(Aiming at the shortcomings of general PSO learning algorithm, which is easy to fall into local optimum and low search precision, the improved PSO algorithm is studied)