利用离散偶极炬算法计算不同形状粒子的电磁波散射特性-DDSCAT, a Fortran code for calculating scattering and absorption of light by irregular particles, has been jointly developed by Bruce T. Draine (Dept. of Astrophysical Sciences, Princeton University) and Piotr J. Flatau (Scr

FFT算法，Cooley-Turkey算法，By HeChaoyang @Dept.51, HiT-FFT, Cooley-Turkey