中文说明：计算球形壳层纳米颗粒的散射问题，包括散射系数矩阵，消光系数，吸收系数等。源程序用matlab编写，方便学习调试
English Description：
The scattering problem of spherical shell nanoparticles is calculated, including scattering coefficient matrix, extinction coefficient, absorption coefficient, etc. The source program is written with MATLAB, which is convenient for learning and debugging