中文说明：
2维高斯拟合，实验过程中用到的，主要是对自己的实验数据的分布频数进行一个二维的高斯拟合来方便可视化实验数据的分布。
English Description：
Two dimensional Gaussian fitting, used in the process of experiment, is mainly a two-dimensional Gaussian fitting for the distribution frequency of their own experimental data to facilitate the visualization of the distribution of experimental data.