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here is a code for some basic operations on speech signal..

SIFT特征提取程序，matlab编写。SIFT是图像上的某种特征，具有尺度，光照，甚至仿射不变性，广泛的用于图像拼接，目标检测，目标跟踪等应用中。(SIFT descriptor)

测量角度：读取图像并选择含有角度的区域，求取角的直线边界，计算直线间的角度。(Measuring angles: read image and choose contain Angle of regional and calculating the Angle between the line, line border calculation.)

program for ofdm,ofdm_ber,coding and decoding(with interleaving),qpsk,hamming codes.

matlab教程，类似计算机语言，很适合初学者的学习教程。(matlab tutorial, similar to computer language, it is suitable for beginners to learn tutorial.)

说明：  超声成像的matlab仿真，挺有用的，各位可以尝试改一改。(simulation for ultrasoung imaging)

LU分解 用比较通俗易懂的语言编写了ＬＵ分解的相关程序(LU)

C4.5决策树算法，可以进行数据分类，是数据挖掘的经典算法(C4.5 decision tree algorithm, data classification, is a classic data mining algorithm)

本程序根据训练好的网络文件ANN.mat预测新的数据文件，得到均方误差，并画出预测数据和原数据的对比图。(the procedures under the trained network file ANN.mat anticipating new data files, to be mean-square error. and the mapping out of the original forecast data and the map data comparison.)

系统辨识与自适应控制中----递推增广最小二乘参数估计算法(Augmented recursive least squares parameter estimation)