secondwave

将梁分成9个单元，在中间受力，建立整体的刚度矩阵，建立整体模型。(The beam is divided into nine units, in the middle forces, the establishment of the overall stiffness matrix, the establishment of the overall model.)

用余弦法仿真的瑞利衰落，包括自相关互相关、功率谱密度等等。依据是Chengshan Xiao2003年的文章。(Cosine method for simulation of Rayleigh fading, including the auto-correlation cross-correlation, power spectral density and so on. Based on the the Chengshan Xiao2003 article.)

ITU标准下的大气传播衰减计算程序，使用简单方便，只需要输入传播角度，高度，气候环境，即可计算大气传输损耗（不包括自由空间传播损耗）(According to the ITU standard, this program calculates the atmospheric loss. It is simple to use, you only have to input some parameters such as height, elevation angle, etc)

matlab lms nlms 变步长自适应 波束形成(matlab lms nlms variable step adaptive beamforming)

this file implement svm in 3d space. libsvm is used for it

三维结构拓扑优化matlab程序，含图形界面top3dGUI，主算法top3d和后处理程序top3dSTL，容易学习。(Matlab code for three-dimensional structural topology optimization , including a graphical interface top3dGUI, primary top3d.m, and post-processing top3dSTL.m.)

利用声卡采集声音，实现声音的滤波处理。很实用，实用matlabGUI写的。最好用matlab2008a以上的版本打开。(this is a sound filter GUI written by MATLAB.)

document powerfull windows 7

Matlab FSK Demodulator

matlab PID 刘金琨《智能控制的MATLAB实现》(matlab PID)