pra1

说明：  神经网络的计算，包括训练和测试两部分，利用的是最小均方误差算法。(Nerual network calculation,including training and working part,utilizing MMSE algorithm.)

用Matlab编写的Mie theory计算程序。在光子学中运用广泛，使用非常方便。(prepared using Matlab Mie theory calculation procedures. Photonics in extensive use, the use is very convenient.)

利用传输矩阵方法，对均匀光栅的反射谱模拟(Uniform grating reflection spectrum simulated using the transfer matrix method)

改进的粒子群算法，有更好的性能，提高了算法的搜索能力(Improved particle swarm optimization, better performance, improved search ability of the algorithm)

观察数据长度N的变化对DTFT分辨率的影响 这几个程序是老师写的 对于理解DTFT有很大帮助(Effect of observation data length N on DTFT resolution These programs are written by the teacher and are very helpful for understanding DTFT.)

ML corrected .m file

说明：  此程序针对地震原始数据形式：单边激发单边接收以计算走时(This process raw data in the form of seismic: unilateral unilateral excitation to calculate the travel time to receive)

高斯坐标，大地坐标，空间直角坐标之间的相互转换，参照控制测量下册公式编写。(Gauss coordinates, geodetic coordinates, space conversion between rectangular coordinates, the formula reference book prepared under the control measure.)

运动目标模拟器相参性分析，分析了基于数字射频存储器(DRFM)的运动目标模拟器(MTS)相参性。由于DRFM延时的离散性,引起了MTS输出信号相位的改变,破坏了信号的相参性,使MTS输出信号频谱发生变化,不仅使谱线位置移动,而且还产生了附加的寄生谱线。分析结果表明,延时更新率(Fc)决定了谱线间隔,并通过sinc函数决定谱线的幅度,而雷达信号频率与所模拟目标的速度共同决定谱线的移动。 (Moving Target Simulator Coherent Analysis, Moving Target Simulator (MTS)-based digital radio frequency memory (DRFM) coherent. Due to the the DRFM delay discrete MTS output signal of the phase change is caused, the destruction of the phase of the signal parameters, the MTS output signal spectrum changes, not only the spectral line position, but also generates additional parasitic spectral line. The analysis results show that the delay update rate (Fc) determines the spectral interval by sinc function determines the amplitude of the spectrum, while the radar signal frequency and speed together determine the movement of the spectral lines of the simulated target.)

FDTD仿真，空气和玻璃界面的折射现象，可以观察到电磁波的折射现象。(A source of electric field is defined at the top edge of the spatial domain,(in glass) on the left half, which is a hard sinusoidal source, in that it does not change its value due to interference from external fields i.e in other words,the source is a perfect electric conductor. )