yuijie_v79

substitution cipher is the method of encoding in which unit of plain text are replaced by cipher text. Monoalphabetic cipher uses a fixed message over entire message.A monoalphabetic cipher uses fixed substitution over the entire message.The monoalphabetic substitution takes a letter of an alphabet and substitutes it with another letter, this way a ciphertext is generated. The way of converting is fixed. A character of the plaintext will be replaced by the same ciphertext character, during the entire ciphertext. There is no additional key. The only way of security is to keep the substitution-table secret. A popular example for the monoalphabetic substitution is the caesar cipher.

基于快速傅里叶变换的GUI设计，能对多个输入序列进行FFT分析，并在画面上显示出输入信号，经过FFT处理，经过IFFT处理的信号波形(GUI design based on the fast Fourier transform, FFT analysis of a plurality of input sequences, and displayed on the screen of the input signal after FFT processing, the signal waveform after the IFFT processing)

实现对离网运行的孤岛微电网的可靠性评估，用的是解析法，能够很好的评估孤岛的可靠性。(Realize the off-grid micro-run island grid reliability evaluation using analytical method, can be a good assessment of the reliability of the island.)

在labview的信号处理中用户来计算波形的包络谱，用来进行信号分析(To calculate the wave spectrum envelope of users in the signal processing of the LabVIEW, used for signal analysis)

移频键控调制方式的matlab编程实例，可以直接用来仿真(Shift keying modulation matlab programming examples, can be directly used to simulate)

利用MATLAB编程解飞秒激光与物质相互作用时所用到的双温方程(solve two tempture model)

找出一个一维数组的周期 例如： 1 2 3 1 2 3 的周期为3 1 2 3 1 2 的周期也为3(Find a cycle such as one-dimensional array: 1 2 3 1 2 3 cycles to 3 1 2 3 1 2 cycles for 3)

说明：  this is very good for master students and use in communication system course

本文件是关于自适应滤波算法的matlab仿真，其中对LMS、RLS等算法给出了具体的程序。(This document is on adaptive filter algorithm of matlab simulation, including LMS, RLS) give a specific procedures. )

物体追踪程序，c++与matlab 的混合编程，可以实现对任何物体的实时追踪，效果很棒。(Track the program, c++ matlab mixed programming objects, can achieve real-time tracking of any object, and the results were fantastic.)