hundunkongzhijizaibaomitongxinzhongdeyingyong

若系统中有信息不完全或不确知的现象，则称为系统的灰色性。这种具有灰色性的系统，称为灰色系统。(If the system has incomplete information or not sure, then known as the system of the gray. This kind of gray system, known as the Gray system.)

here are the codes in matlab for effects of temperature ,refractive index and length of the grating in FBG spectra,and reflection spectrum of TE and TM modes of 1D photonic crystals

使用递推极大似然估计法辨识系统参数,这是《系统辨识》这门课程的程序，希望大家（特别是上这门课需要写论文的同学）能够用得上(Using maximum likelihood estimation method recursive identification system parameters, this is the " system identification" procedure for this course, I hope you (especially on this course requires students to write papers) to the lingua franca of)

Matlab编程必备手册，包含编程格式规范，程序控制结构和实例，适用于初学者。(Matlab programming required manual contains programming format specification, program control structure and examples for beginners.)

Opencv code for Sobel edge detection

非常详细的matlab开发手册，包括图像、通信、数值计算等等。(very good book of the matlab)

计算地球上的椭球面的距离，输入两点的经纬度(Calculated on the earth ellipsoid distances, enter the latitude and longitude points)

关于DCT和DWT在MATLAB上面的实现，很有参考价值(DCT and DWT in MATLAB for the implementation of the above, a good reference)

Subscript Span extends Metric Affecting Span implements Parcelable Span.

假定半波长间隔均匀分布线列布阵的阵元数N=16，若入射平面波为f=62.5Hz的正弦信号，信号持续时间为0.4s， 系统采样频率 =1 KHz,阵列加权为均匀加权，分别给出 a)当平面波信号分别从 0,10,20,30,40,50,60,70,80,90,100度方向入射时，指向90度的波束形成器的输出序列； b)当平面波信号分别从0:1:180度方向入射时，指向90度的波束形成器的输出序列经过平方求和后的分贝数输出（把所有181个输出绘制在同一幅图中)(Assuming N=16, f=62.5, fs=1KHz, uniform weight, and the code gives: a) 90 degree response when incidence angles are: 0: 10: 100 degrees b) 90 degree spectral response when incidence angles are: 0:1:180 degrees )