PID_code

这是一个模拟第3类模式地震波的matlab脚本。 This a collection of Matlab scripts that solve the antiplane (mode III) earthquake dynamic problem with slip-weakening friction, on a 1D fault embedded in a 2D homogeneous elastic unbounded medium. The problem is formulated as a boundary integral equation and the elastodynamic kernels are analytically derived in the spectral domain (spatial wavenumber). The method is explained e.g. by Morrysey and Geubelle (1997), and has been improved and extensively used by Nadia Lapusta, Alain Cochard, etc. (This is a Class 3 model simulation of seismic waves of matlab scripts. This a collection of Matlab scripts that solve the antiplane (mode III) earthquake dynamic problem with slip-weakening friction, on a 1D fault embedded in a 2D homogeneous elastic unbounded medium.The problem is formulated as a boundary integral equationand the elastodynamic kernels are analytically derived inthe spectral domain (spatial wavenumber). The method is explained eg by Morrysey and Geubelle (1997), and has been improved and extensively used by Nadia Lapusta, Alain Cochard, etc.)

system_Newton-Laphson in matlab

非常经典的7自由度车辆动力学模型，用于车辆动力学分析（需要matlab2008以前的版本打开运行）。(Very classic 7 degrees of freedom vehicle dynamics model for vehicle dynamics analysis (need matlab2008 previous versions open run).)

ULPI UTMI conversion

it is homomorphic matlab code

这是用ELM（极限学习机）做的关于图像识别的分类实验，有数据，有程序，有训练时间，测试时间和精度(It is used ELM (Extreme Learning Machine) to do experiments on the classification of image recognition, has data, procedures, training time, test time and accuracy)

同态滤波法、希尔伯特法、香农法求取心音信号包络的matlab算法(The homomorphic filtering Law Shannon Hilbert method of calculating the heart sound signal envelope Matlab algorithm)

做信号处理的时候经常会用到FFT，而MATLAB自带的FFT只能变换出一列系数，想做成频谱图还要自己加一部分，自己写了一个小程序，输入原始信号和采样率，可以画出标准的幅值谱和功率谱。(Do signal processing is often used when the FFT, and FFT MATLAB own transformation from a coefficient of only wanted to make Canada part of the spectrum but also their own, to write a small program, the input original signal and the sampling rate can be Draw a standard amplitude spectrum and power spectrum.)

ColP3D a matlab code for simulating a 3D hydraulic fracture

我下的一本关于机械故障诊断的电子书，对初学者入门比较好(I was under a mechanical fault diagnosis on the books, started better for beginners)