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适用于MATLAB中的小程序，功能是：添加环境效果，已经验证，可以使用。(Applicable to the small MATLAB program functions are: add environmental effects, has been verified, you can use.)

利用差分法求解热传导方程，然后用matlab编程解差分方程(Heat conduction equation)

二维声波传播过程模拟，采用一定合适的吸收边界条件(2D acoustic propagation simulation with PML boundary)

根据滚动轴承的内圈，外圈，滚动体，正常四方面做故障诊断预处理(According to the fault of rolling bearing inner ring, outer ring, rolling body, the normal four fault diagnosis pretreatment)

MATLAB处理神经网络的43个案例，推荐学习(MATLAB neural network processing 43 cases, it is recommended to learn)

利用MATLAB GUI做的三维数据自动绘图程序，安装运行库后可自动运行，实现从EXCEL读取数据并自动绘制三维曲面图的功能(Using three-dimensional data in MATLAB GUI to do automatic drawing program, after installation of runtime to run automatically read data from a EXCEL and automatically draw the three-dimensional surface map features)

说明：  利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。 脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式。波形编码器的作用是对采样后的信号样本进行量化和编码。从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM可分为均匀量化PCM和对数PCM两大类，对数PCM中，2Aμ律和律编码都已被定为国际标准。(Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process. Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values​ ​ , encoding is to use a set of binary digits, said after a limited number of these maps. By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM in, 2Aμ law and legal codes have been designated as international standards.)

这是一个关于垂直腔半导体光放大器（VCSOA，微腔光放大器的一种）中的双稳态曲线计算程序，用Matlab语言写成，可执行。程序是根据VCSOA中的速率方程（Rate Equation）编写的。从曲线上可以看出随着输入功率Pin的变化VCSOA的输出功率Pout的双稳态曲线，是进一步研究该问题的基本素材之一。(This is a computation program for calculating the bistability activity of the vertical cavity semiconductor optical amplifier, which is based on the rate equation in VCSOA. This code is a basis for further investigating other activities in VCSOA related to bistability. )

mathews数值分析书的源代码，用matlab编写，可以对照书本学习。(mathews numerical analysis of the book' s source code, using matlab, you can control book-learning.)

matlab函数，专门计算列车车体横向sperling平稳性指标。调用方式：y=lridex(acc)，其中acc为测得的或仿真得到的车体横向加速度（不包括时间列）。(matlab function, specifically calculate the train body lateral sperling smooth indicators. The invocation: y = lridex (ACC), wherein acc obtained for the measured or simulation vehicle body lateral acceleration (not including the time column).)