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通信的数字化是它能与计算机技术和数字信号处理技术相结合的基础，而实现通信数字化的前提是信源能提供的各种用于传递的消息，例如语音、图像、数据、文字等都必须以数字化形式表示。而信源编码是数字通信系统中的重要组成部分，他是保证信号有效传输的一种重要方式。霍夫曼编码依据字符出现的概率来构造异字头的平均长度最短的码字，有时称之为最佳编码，其优越的性能被广泛使用在数字通信系统中。霍夫曼编码已经成为数据压缩的灵魂算法。本文介绍了无失真编码算法的构造，霍夫曼编码的规则和特点，同时分析了对信源进行优化的方法，最后通过MATLAB仿真来讨论比较二元霍夫曼编码、三元霍夫曼编码以及信源扩展编码的效率，来实现霍夫曼码的优化构造。(The digital communication is it can and computer technology and digital signal processing technology in combination of the base, and realize the digital communication is the premise of source can provide all kinds of used to deliver news, such as voice, video and data and text must take the digital form said. And the source coding digital communication system is the important component, he is to ensure the effective transmission signal is an important way. Huffman coding based on the probability of characters appear to construct different "the average length of the shortest code words, sometimes called the best coding, superior performance is widely used in digital communication system. Huffman coding has become the soul of data compression algorithm. This paper introduces the structure of the encoding algorithm without distortion, Huffman coding rules and characteristics, and analysis of the source of the optimization method, and finally by MATLAB simulation to discuss compares two yu)

关于最优化算法的Matlab仿真程序，最速下降法与牛顿法。(Optimization algorithm Matlab simulation program, the steepest descent method and Newton method.)

运用MATLAB软件对层次分析法做进一步的探索与研究，对选购手机有一定的借鉴意义(Using MATLAB software AHP for further exploration and research on purchasing mobile phones have some reference)

经典的Kay写得数字信号处理的matlab代码，很有意义，分享(Designed for practicing electrical engineers, researchers, and advanced students, this text is a thorough, up-to-date introduction to optimizing detection algorithms for implementation on digital computers. For a full book description and ordering details please refer to http://www.mathworks.com/support/books/book1505.jsp )

这个是上海傲谱分析仪器有限公司型号为FP650型火焰光度计的说明书(This is the Shanghai Ao spectrum analysis instrument Co., model for the FP650 type flame photometer.)

matlab基础讲义以及例子和程序编写，老师推荐(matlab Advanced Materials )

these files perform digital modulation and demodulation, and provide scatter plots

find the local maximum of the data, and filter high frequency signal.

var模型的实现。针对var模型的算法，估计模型的参数。并对其进行检验(achieve var model. Var model for the algorithm, the estimated parameters of the model. And its test)