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说明：  My friend give this to me. I hope it will be helpful to others.

fdtd 在自由空间没有吸收边界的情况下的代码(1D FDTD simulation in free space Without Absorbing Boundary Condition )

关于matlab学习的PPT,实例讲解，适合初学者进行入门学习，最后达到熟练编程。(On matlab learning PPT, examples explain, is suitable for beginners to introductory learning, and finally reached the proficient programming.)

对于传递函数为G=1/(s*s+2*&*s+1)归一化二阶系统，制作一个能绘制该系统单位阶跃响应的图形用户界面。本例演示：（A）图形界面的大致生成过程；（B）静态文本和编辑框的生成；（C）坐标方格控制键的形成；（D）如何使用该界面。(for the transfer function of G = 1/(s* s* 2)

orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the spectrum is spread through the use of a user s code. User s codes are carefully chosen to be mutually orthogonal to each other. These codes are derived from an OVSF code tree, and each user is given a different, unique code. An OVSF code tree is a complete binary tree that reflects the construction of Hadamard matrices.

基于三电平滞环有源电力滤波器（APF）的仿真设计，包括（谐波检测， 电流跟踪环节） Z域(Based on three-level hysteresis active power filter (APF) simulation design, including (harmonic detection, current tracking links) Z domain)

一个单车道元胞自动机程序，对学习元胞很有帮组(a cellular automation model for one lane)

给定一个子波计算LS反滤波。有点小问题。你们帮忙看看...(Given a wavelet compute the LS inverse filter)

傅立叶变换和滤波器设计的ppt介绍傅立叶变换和滤波器设计(Fourier transform and filter design ppt)

Time response of second order system