chebyshev-filter

说明：  communication matlab

This sourcecode extracts de melcepstrum coefficient of an audio file. You should give to de function, the audio file save as a vector, and the function returns a vector with 23 melcepstrum coefficients.

基于纹理结构的图像检索，matlab实现。(Texture-based image retrieval, matlab achieve.)

大牛ELAD关于sparse representation的代码(The large cattle ELAD About sparse representation of the code)

说明：  ga-pls选取特征波长，能过有效减少建模所需要的波长。(Ga-pls can effectively reduce the wavelength required for modeling by selecting the characteristic wavelength)

用MATLAB编写的基于有限体积法求解二维浅水方程边界数值通量的Riemann求解器（HLL格式），可处理干河床问题，适用于规则网格及不规则网格，只需提供边界左右两侧的水深和流速以及外法线矢量(Written using MATLAB numerical flux based on the finite volume method for solving the two-dimensional shallow water equations boundary Riemann solver (HLL format), can handle the dry riverbed problem, applicable to a regular grid and irregular grid, just on both sides of the border around water depth and flow rate as well as outside the normal vector)

本章先分析说明伪谱法求解波动方程的算法原理，再给出弹性波场伪谱法数值模拟的改进算法；然后，通过直接引入P波波场变量和S波波场变量，给出可实现弹性波场的P波和S波分解的波动方程，并用伪谱法实现弹性波场的P波和S波分解的数值模拟；最后用伪谱法对井间地震的复杂波场作数值模拟，分析井间地震波场中各种波的传播规律。(In this chapter, the principle of pseudo-spectral method for solving wave equation is analyzed, and then an improved algorithm for numerical simulation of elastic wave field is given. Then, by directly introducing P-wave field variable and S-wave field variable, the wave equation which can realize P-wave and S-wave decomposition of elastic wave field is given, and the P-wave sum of elastic wave field is realized by pseudo-spectral method. Numerical simulation of S-wave decomposition; finally, pseudo-spectral method is used to simulate the complex cross-well seismic wave field and analyze the propagation law of various waves in cross-well seismic wave field.)

log transfermation of an image

说明：   学习matlab的朋友，这是一个计算线性方程组的程序，略有改进，若有疑问不吝赐教(learning Matlab friends, which is a calculation of linear equations procedures, a slight improvement If in doubt wing)

Digital Image Processing Using Matlab Additional Material