quanxixue

说明：  卡尔曼滤波仿真实例，内附word版实验报告(Kalman filter simulation, experimental version of the report containing a word)

hidinh message with lsb algorithm in matmab m-file

说明：  众所周知，turbo码是cdma2000中一项重要的技术，该程序用simulink模拟实现turbo编码(As we all know, turbo code is an important cdma2000 technology, the process simulation using simulink realization of turbo coding)

编写K-均值聚类算法程序，对下图所示数据进行聚类分析(选k=2)(prepare K-means clustering algorithm, the data shown in the chart below cluster analysis (EAC k = 2))

it is a matlab code about sfc that use in matlab.it is one of most important problems in numerical calculation

输入一串汉字就能分别显示其对应的区码和位码，对于上计算机文化与基础的同学来说，较为有用，可容易理解汉字内码相关知识。程序注解非常详细。(simple and powerful for comprehending the inner-coding of Chinese characters)

pid simulator for bldc

说明：  数学建模竞赛：露天矿的开采问题，运用lingo与matlab编程，内附代码(Mathematical Contest in Modeling: Open-pit mining problem, the use of lingo with the matlab programming, containing code)

leach协议的MATLAB实实现,是研究无限传感器网络的必备 (leach MATLAB real implementation of the protocol, it is essential to study the infinite sensor networks)

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.