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说明：  DSP入门：应用傅里叶变换对信号进行频谱分析(DSP basis: Implement of Fourier Transfer to analysis signals spectrum)

GN距离法是一种基于马氏距离的建模集样品的挑选算法(GN distance method is a kind of based on markov distance modeling set sample selection algorithm)

Matlab中提供了一种快速实现多项式拟合的方法函数polyfit()函数， 其格式：p=polyfit(x,y,n)其中x，y为样本向量，n为拟合的多项式的项数。下面拟f(x)=sinx+x,在区间【-3,3】上以0.5为间隔进行拟合。(Matlab provides a fast way to achieve polynomial fitting function polyfit () function, The format: p = polyfit (x, y, n) where x, y as the sample vector, n is the number of items of polynomial fitting. The following proposed f (x) = sinx+ x, the interval-3,3】 【intervals on the order of 0.5 to fit.)

MATLAB code for Substation Expansion Planning

文宇工作室MATLAB教程 文宇工作室MATLAB教程 (The Wen Yu studio MATLAB teach Cheng Wenyu studio MATLAB tutorial)

a very good book by bentley about transeducer technology useful inPG course

说明：  用简正波方法进行声场计算的karaken程序(karaken program for acoustic field caculation by nomal mode method)

Plots the irradiation diagram of a random N isotropic elements array

对信号进行希尔伯特黄变换，随后求边际谱，帮助理解希尔伯特黄变换(The signal Hilbert Huang Transform, and then seek marginal spectrum)

数值求Mittag-Leffler function，这个给出一个多参数的求值，可用在数值仿真。(Solve the value of Mittag-Leffler function, which can be applied the simulink in Matlab.)