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matlab在工程数学方面的应用教学文档，matlab是一款功能强大的软件，可以应用于多种领域，本文档着重介绍matlab在工程数学领域的应用。(matlab engineering applications in mathematics teaching document, matlab is a powerful software that can be used in a variety of areas, this document focuses on matlab projects in the field of mathematics.)

在MATLAB中实现霍夫曼编码，粗略实现编码(Implementation of Hoffman coding in MATLAB)

naive bayesian classification

给一个受污染的声音文件用滤波器用matlab消除噪声(Give a contaminated audio files using filter to remove noise)

传输线的工作状态波形，包括行波和驻波，当参数改变时，传输线的工作状态也因此而改变(The operating state of the waveform of the transmission line, including traveling wave and standing wave, when the parameter is changed, the working status of the transmission line can also be changed)

说明：  传递矩阵法计算梁的横向振动频率，各种边界条件(Frequency calculate by TMM for beam vibration, free-free boundary conditions, simply supported)

说明：  Maple使用教程：maple是解数学物理方程的软件类似于matlab，该教程让初学者轻松的学会用该软件求解复杂的数理方程(Maple tutorial)

To detect skin color based on threshold. Using simple method , with LOC less than 100 but efficient

换能器导纳图绘制函数，需要自备换能器导纳数据，代入即可(Transducer admittance mapping function, you need to bring their own transducer admittance data can be substituted into)

have adapted the PSO to search in binary spaces