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1-D FDTD code with simple radiation boundary conditions

替代数据法中最重要的文献和文献相关的软件代码，非常经典亚(alternative method of data the most important literature and the literature related to the software code, very classic Asia)

去斜率（strech）参考信号与回波信号混频后得到中频输出信号S(t)=Aexp(j*2*pi*f0*t+phase) 其中f0与回波延时的关系为： f0=k*delay_t K为线性调频斜率，delay_t为回波延时 将s(t)采样，FFT变换即可得到目标距离与频谱的关系。 Strech 信号测距 输入混频后的中频信号（图一），经采样及FFT变换得到频谱（图二） 再根据频谱与距离的关系式R=Tcf/2B显示出距离(图三) (Go slope (strech) obtained after the reference signal and the echo signal mixer IF output signal S (t) = Aexp (j* 2* pi* f0* t+phase) f0 and echo delay relationship: f0 = k* delay_t K chirp slope, delay_t the echo delay sampling s (t), the FFT transform to the target distance spectrum of relations. Strech signal ranging input mixer IF signal (Figure 1), sampling and FFT transform spectrum (Figure 2) according the the spectrum distance relationship R = Tcf/2B shows the distance (Figure 3))

Small program for using LMS filter

histogram equalisation code in matlab

主要用于解决数学软件matlab的曲线拟合问题，其中包括：指数曲线拟合,抛物线拟合，直线拟合。(matlab)

说明：  该程序用于大地反算，参考于武汉大学测绘学院出版的大地测量学基础（第二版）(The inverse procedure for the earth, the reference in the School of Surveying and Mapping, Wuhan University, published the basis of Geodesy (second edition))

说明：  书籍，讲授如何使用MATLAB软件完成基本的使用和操作，适合与初学者使用！(Books, taught how to use MATLAB software to complete the basic use and operation, suitable for use with beginners!)

可以实现动态绘制矩形、圆形、椭圆形等图样。matlab例程(Can dynamically draw the rectangle, round, oval and other patterns. matlab routines)

add all prime num smaller than n and this is a simple code run by windows cmd