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1. 选择一个wav文件作为分析的对象，对该信号进行读取（使用wavread函数）； 2. 音乐信号的频谱分析：首先画出信号的时域波形，然后对信号进行频谱分析得到信号的频谱特性。 3. 设计一组数字滤波器并画出各个滤波器的频率响应 (Filter)

基于MATLAB 对数据进行处理 加密解密(MATLAB-based encryption and decryption of data processing)

简洁但是经典的Root Music DOA 算法,是用多项式求解的方法来寻找DOA(Direction of Arrival )(simple but classic Root Music DOA algorithm, is the polynomial method to find DOA (Direction of Arrival))

this code will convert gray to rgb

数据包络法，层次分析法的结合，用于方案评估(Combination of data envelopment analysis and analytic hierarchy process for program evaluation)

利用最小二乘法进行拟合多元非线性方程，最小二乘回归分析算法，计算目标和海洋回波的功率谱密度。( Multivariate least squares fitting method of nonlinear equations, Least-squares regression analysis algorithm, Calculating a target and ocean echo power spectral density.)

this matlab code is for the FDTD 2D

此文档为QNX6.5的安装过程说明，包括QNX在vmware上的安装过程说明，特别适合第一次接触QNX的人，用于安装教学(This document is QNX6.5 installation process instructions, including QNX installation on vmware instructions, especially for QNX first contact with people, for the installation of teaching)

通过Matlab程序进行计算金的drude模型(calculating of Au drude model)

its a code to make a implementations of a digital system of communication using enthropy with text