huffman

例举了中值滤波，均值滤波等方法，以及用MSE和PSNR来判断图像质量。(Cites median filtering, average filtering method and the use of MSE and PSNR to judge image quality.)

This project uses PCA (Principal Component Analysis) to detect face from 2D images.

说明：  这是一个函数图像的源代码，用matlab编程的(function graph)

matlab平台上实现函数y=sinx的逼近程序，构造bp算法实现（输出层采用y=x线性函数，隐含层采用非对称Sigmoid函数）(matlab platform function y = sinx approximation procedures, construction bp algorithm (output layer using linear function y = x, hidden layer use of non-symmetrical Sigmoid function))

重力异常的向上延拓程序，很实用，推荐地球物理学生学习(Gravity anomaly upward extension procedure is very useful, recommended geophysics students)

DOCUMENT FOR BASIC LEARNING OF COMMUNICATION IN VARIOUS ASPECTS.

用于系统辨识的matlab6.0程序，对学习系统辨识的研究人员很有帮助(System Identification matlab program)

sampling programs in matlab

MATLAB 第三代多目标性能指标计算源程序，适合于较新的多目标智能算法比较(MATLAB source the third generation of multi-objective performance index calculation, suitable for a new multi-objective intelligent algorithm)

说明：  an investigation on use of chaotic sequence in DS-CDMA. The DS-CDMA systems offer physical layer security without the need for a significant increase in computation or power requirements. Nowadays, DSCDMA has been used widely. These systems suffers from multiple access interference because of other users transmitting in the cell, channel inter symbol interference and additive white Gaussian noise. Codes have an effective role in DSCDMA system, so M-sequences; gold sequences have been used as spreading codes in DS-CDMA. These sequences by shift registers and periodic in nature are developed. However, these sequences are not enough and also limit the security. This paper presents an investigation on use of new type of sequences called chaotic sequences for DS-CDMA system. These sequences by chaotic maps are generated.