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emd经验模态分解 对振动信号进行emd分解后可以得到若干个imf,然后便可以进行希尔伯特黄变换，判断故障。(emd, it is used to analyse a signal)

Introductory Finite Difference Methods for PDEs

读取SAC格式天然地震数据，可以先读取158字节道头，并且输出NPTS（数字字母码格式），然后开始读取地震数据(Read SAC natural seismic data format that can be read 158 bytes road head, and the output NPTS (alphanumeric format), and then start reading the seismic data)

《MATLAB科学计算宝典》一书附录的例程,全程实例解说MATLAB数值计算和数据可视化功能，提高实用经验。包括微分，积分计算，超越方程，混沌，机械振动等的模拟。(matlab science calculate， all sorts of model for science research and so on.)

it is a code of dispersion relation of one dimension phononic crystal

Ever wanted to programmatically associate a file type on the system with your application, but didn t like the idea of digging through the registry yourself? If so, then this article and code are right for you.

说明：  MATLAB实用教程（第2版）实例源代码程序EXE0705(MATLAB Practical Guide (2nd Edition) examples source code program EXE0705)

应用matlab程序设计的一个日历界面，方便查询日历和日期(Application matlab programming a calendar interface, easy access calendar and date)

运用最小二乘法进行风电功率拟合，再使用它进行预测，含数据和实际案例(Using the least squares method to fit wind power, and then use it to predict, including data and actual cases)

really understand,describe using matlab