中文说明：
文件中包含一个用matlab simulink搭建的光照强度模型和一个画出不同月份某一天光照强度随时间变化曲线图的matlab脚本程序。
English Description：
The file contains a model of light intensity built by MATLAB Simulink and a matlab script program to draw the curve of light intensity changing with time on a certain day in different months.