计算不同温度下麦克斯韦速率分布律的图像，并用辛普森方法求图像下方面积(The image of Maxwell velocity distribution law at different temperatures is calculated and the area under the image is calculated by Simpson method)

根据高斯光束的特性，在matlab中作出束腰半径为0.5mm的高斯光束在束腰处的三维光强分布图。(According to the characteristics of the Gauss beam, the three-dimensional intensity distribution of the Gauss beam with the waist radius of 0.5mm at the waist is made in MATLAB.)

2018.01最新编译，matlab需要2016b以上。 将需要运行的exe文件拷贝到MATLAB文件夹下，如bellhop3d.exe(The latest compilation(2018.01). Matlab should be 2016b or later. Copy the the "exe" file that you need to run under the "MATLAB" folder, such as "bellhop3