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this is pdf paper . i want to download codes with matlab

离散数据频谱分析，采样数据进行离散后，获取信号中的周期运动信息(matlab，FFT，frenquence chart)

说明：  Welch法功率谱密度 Psd自功率谱 是用改进的平均周期图法来求随机信号的自功率谱估计 采用信号重叠分段，加窗函数和fft算法等计算一个信号的自功率谱估计（PSD）

EMD(经验模态分解)代码，安装于matlab-toolbox使用。(EMD(expirical mode decomposition)code,installed on the toolbox of matlab.)

汽车魔术公式的轮胎simulink模型，采用adamds拟合参数(Auto magic formula of the simulink model, uses the adamds fitting parameters )

该模型是模拟信号数字传输系统，可以把一个模拟信号通过PCM编码译码，信道2FSK编码译码，再通过一个二进制对称信道，可以恢复出原模拟信号(The model is the analog signal digital transmission system, an analog signal by the PCM codec, channel 2FSK codec, and then through a binary symmetric channel, you can restore the original analog signal)

csem modelling code for one dimension layered earth

说明：  光纤LP31模式,光纤模式计算，纤芯模式，有效折射率(Fiber LP31 mode, fiber mode calculation, fiber core mode, effective refractive index)

信号处理，Prony分析,常用于电力系统大扰动分析、在线模式分析、控制器设计等等(Signal processing, Prony analysis, commonly used in large power systems disturbance analysis, online mode analysis, controller design, etc.)

1.二值图像的fft分析 2.显示频谱图像，频谱的零频率系数被移到频谱中间 3.填充矩阵填充后的情况比较 4.绘图直观形象(1. Binary Image fft analysis 2. Image shows the spectrum, Spectrum coefficient of zero frequency spectrum has been moved to the middle three. Filled Filled matrix compared to the situation after four. Mapping visual image)