fast-S-transform

用K均值聚类法对数据进行分类，比较简单和基础的分类方法，可用于图像处理(With the K-mean method for data classification, the classification of simple and basic method can be used for image processing)

Advances of Research in Independent Component Analysis

数字信号处理中粒子滤波方法 (The Particle Filtering Methodology in Signal Processing)

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution ciphers are useful because the are less easily broken by frequency analysis, however if an attacker knows for instance that the message has a period n, then he simply can individually frequency analyze each cipher alphabet. The number of letters encrypted before a polyalphabetic substitution cipher returns to its first cipher alphabet is called its period. The larger the period, the stronger the cipher. Of course, this method of encryption is certainly not secure by any definition and should not be applied to any real-life scenarios.

fft与边际谱的对比，并画出hilbert图和三维时频谱图(compare fft with marginal spectrum and plot the hilbert figure and 3d time-frequency picture)

说明：  Matlab精彩编程一百例，图形图像处理，函数处理(Exciting one hundred cases of Matlab programming, graphics, image processing, function handle)

Estimation of free CO2 in Kiln

自动增益控制AGC的Matlab源码，其中注释部分对原理进行了详尽的介绍(AGC source code for audio gain control, details has been gaven in the comments)

用simulink做的机械系统的摩擦模型，希望对大家有帮助。(Mechanical Friction with Simulink and Physical Modeling)

DTMF for matlab, using Goertzel algorithm and some test to veryfy the different tones