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用matlab实现FFT，不是用matlab自带的函数fft，而是自己重新编程(Matlab implementation with FFT, not the native function with matlab fft, but his re-programming)

convolution code in matlam code language

基于牛顿插值方法，由位置微分得到速度。给出卷积系数(Newton interpolation method by position differential speed. Given convolution coefficients)

This is the parser of NMEA encoded data from GPS it separates lat and long

本书系统介绍了图论重要算法的思想及其 MATLAB实现，可供数学、计算机科学、工程科学等学科中相关专业的大学生、研究生阅读,也可供相关专 业研究人员参考。(This book systematically introduces the idea of the important algorithm of graph theory and its MATLAB implementation, which can be read by college students and graduate students majoring in mathematics, computer science, engineering science and other disciplines, and can also be referred to by researchers specializing in related fields.)

三个txt数据文件的意义及其数据格式举例 97县名称号码、纬度、经度(Txt data files of three of the significance of the data formats, for example the name of 97 the county number, latitude, longitude)

Spectral Element Method to solve the 2D SH wave equation,strain weakening (plasticity) in the bulk,paraxial absorbing boundary conditions and zero initial conditions in a structured undeformed grid.

实现输入一串数字，然后matlab可以将数字对应的蜂鸣音播放出来（类似于电话的拨号）(Achieve input a string of numbers, then you can figure corresponding matlab beep play out (similar to dial-up phone))

是经验模态的函数，用于进行数字信号处理。可以用于分解频率(Is the empirical mode of function, used for digital signal processing. Can be used to decompose the frequency)

说明：  基于SVPWM技术的永磁同步电机仿真模型(SVPWM technique based on simulation model of permanent magnet synchronous motor)