吴恩达深度学习基础教程

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.

Signal Processing blocks

tsp using Genetic algorithm

讨论了多变量灰色预测模型的算法,给出多变量灰色预测模型的Matlab程序.通过实例说明算法程序的应用和效果. 更多还原 (Algorithm discussed multivariable gray forecasting model, gives the Matlab program multivariable gray forecasting model by examples illustrate the application and effectiveness of the algorithm of the program. More reduction)

矢量网络分析仪的驱动程序，可以用matlab调用(Vector network analyzer driver, you can use matlab call)

This tests the new String object method: concat.

支持向量机(SVM)实现的分类算法源码[matlab](Support Vector Machine (SVM) classification algorithm realize the source [matlab])

Simulation in Matlab m-File PID Anti_Windup

说明：  字母识别源程序,能够对26个字母进行识别，并以A为例做识别演示(source identification letters to the 26 letters identification, and as an example to do a demonstration Recognition)

巴特沃思滤波器matlab程序处理，包含高通、低通等等(butteword filter)