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说明：  expense traker ,the study material

关于ESPRIT算法的误差程序，在不同信噪比下算法的误差曲线(The error process on the ESPRIT algorithm)

check how median filter works

计算灰色关联度，参考因子与比较因子共同存储在一个矩阵，参考因子为第一列(failed to translate)

Filter for equalizer

This is one of the best otmization numeric method.

卡尔曼滤波的理解，利用一个简单的正弦信号来进行卡尔曼滤波，从而更好的理解卡尔曼滤波。(Understanding of the Kalman filter, with a simple sinusoidal signal to the Kalman filter so as to better understand the Kalman filter.)

一个二维静电场，电位函数为φ（x, y），将正方形分成25个正方形网格。有16个内部网格点。假定16个网格点的初值都定为零，试用超松弛法确定16个内部网格点的电位值。(A two dimensional electrostatic field, the potential function for phi (x, y), the square into 25 square grid. There are 16 internal grid point. Assume that 16 mesh point of initial value at zero, trial overrelaxation method to determine the potential value of 16 internal grid point.)

Akkto_test This test is really unuseful akko test

意大利Etna火山InSAR实测的SLC数据，即两幅天线的SAR复图像，mat格式，可以用MATLAB直接读取后进行图像配准、相位滤波、解缠绕等步骤。(Etna volcano, Italy measured the SLC InSAR data, that is, two antenna SAR complex image, mat format, can be read directly after the MATLAB image registration, phase filtering, winding steps of solution.)