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说明：  瑞利随机数的生成，通过两个同方差的正态分布而求得，并求出其PDF和CDF(Rayleigh random numbers generated by two normal distribution with variance that obtained and solved its PDF and CDF)

系统辨识导论课程学习资料，教你学习辨识基础知识(Introduction to System Identification curriculum learning materials to teach you the basics of learning to identify)

在matlab的小波分析中标,设计一个包含若干不连续点的一维信号，利用小波变换的模极大提取它的阶梯型边界点。(Matlab wavelet analysis in the successful design that contains a number of discrete points of one-dimensional signals, using wavelet transform modulus maxima extraction of its ladder-type boundary points.)

这是机械工业张德丰《MATLAB与外部程序接口编程》随书源码，这本书详细介绍了MATLAB与C、C++、Excel、VB、Delphi、FORTRAN相互调用的方法，使得我们可以综合利用传统编程语言执行效率高和MATLAB函数库功能强大的优势，本书对于MEX和MAT文件、MATLAB引擎、MATLAB C/C++函数库、Matcom等都作了详细的介绍并举例说明，书籍最后还介绍了MATLAB的串口接口。(This is the machine-building industry张德丰" MATLAB and external program interface programming" with the source book, this book details MATLAB with C, C++, Excel, VB, Delphi, FORTRAN calls each method, allows us to provision of comprehensive utilization of traditional efficient way to implement the language and MATLAB function library powerful advantages, this book MEX and MAT files for, MATLAB engine, MATLAB C/C++ function library, Matcom have made a detailed introduction and examples, the book also introduced the final MATLAB serial interface.)

image match with guide

to play audio wave file with coding

matlab入门书籍，对学习matlab有帮助(matlab entry books, learn matlab)

MATLAB+7.X程序设计语言（第二版）楼顺天 第一章 MATLAB系统概述 第二章 MATLAB基本操作 第三章 MATLAB图形系统 第四章 MATLAB程序设计 第五章 MATLAB基本应用领域 第六章 数据阵列类型与结构 第七章 字符串处理 (MATLAB+7.X programming language (second edition) the MATLAB basic operation of floor Sunchon MATLAB System Overview Chapter II Chapter III of MATLAB graphics system Chapter Chapter MATLAB basic applications Chapter MATLAB programming data array type and structure of Chapter VII of the string processing)

本代码使用matlab工具实现了一幅图片的位面图提取，且实现了在某个位面上加密信息、恢复信息的功能。并给出三幅图片的运行结果展示。(This code uses the matlab tool to achieve a picture of the bit plane map extraction, and the realization of the encrypted information in a bit plane, the function recovery information. And gives the results of running three pictures show.)

说明：  简单的小波包分解和重构单路信号，包括求小波的能量熵(Wavelet Packet Analysis)