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The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.Though the cipher is easy to understand and implement, for three centuries it resisted all attempts to break it this earned it the description le chiffre indéchiffrable (French for the indecipherable cipher ). Many people have tried to implement encryption schemes that are essentially Vigenère ciphers.[3] Friedrich Kasiski was the first to publish a general method of deciphering a Vigenère cipher.Unlike the monoalphabetic ciphers, polyalphabetic ciphers are not susceptible to frequency analysis, as more than one letter in the plaintext can be represented by a single letter in the encryption.

读入文本数据，绘制地震波时间域曲线及频谱分析图(Read text data, seismic mapping and spectral analysis of time domain curve diagram)

说明：  一个用于MATLAB中实现的FFT功能的码序列。很有用，有帮助(One for the realization of the FFT function of MATLAB, the code sequence. Very useful, helpful)

It is a matlab code for K Nearest Neighbor algorithm.

this file finds the antenna correlation in the case of MIMO

matlab开发环境，．编程实现二维DFT的变换，并与标准函数结果fft2进行比较，基本傅里叶、离散余弦变换，空域（完成两个程序） 增强噪声后再进行处理，利用标准函数，求图像阈值分割、边缘检测的基本使用（lena256.bmp，方法：graythresh、edge），求分水岭，利用标准函数dwt2、idwt2分解图像man_pic.jpg，基本 BP-BPbase1 (matlab development environment. Programming dimensional DFT transform, and with the standard functions compare results fft2 basic Fourier, discrete cosine transform, airspace (to complete the two programs) to enhance the noise and then processed using standard functions for image thresholding, edge Detection of basic use (lena256.bmp, method: graythresh, edge), seeking watershed, using a standard function dwt2, idwt2 decomposed image man_pic.jpg, basic BP-BPbase1)

基于2psk调制下的网络编码性能分析。使用matlab平台开发。针对网络编码的公式进行画图分析。(On 2psk modulation of network coding performance analysis. Use matlab platform. The formula for drawing network coding analysis.)

说明：  基于小波变换的数字图像水印算法研究的论文(Wavelet-based Digital Image Watermarking Algorithm papers)

粒子滤波方法用于跟踪，很易看懂的程序，建议初学者下载学习(Particle filter for tracking, it is easy to understand the procedures recommended for beginners to learn to download)

matlab教程 拉格朗日插值，本程序使用matlab开发环境实现了数值方法的高斯插值内容，方便好用，将所需插值数据加入，即可实现高斯插值(Lagrange interpolation, the program uses matlab development environment to achieve a numerical method of Gaussian interpolation content, easy to use, add the required data interpolation, Gaussian interpolation can be realized)