https://seeyourmind.github.io/2022/04/11/%E4%B8%93%E9%A2%98%E5%AD%A6%E4%B9%A0/%E9%AB%98%E6%96%AF%E5%88%86%E5%B8%83/ 单变量高斯分布(univariate Gaussian )$$f(x)=\frac{1}{\sqrt{2 \pi} \sigma} \exp \left(-\frac{(x-\mu)^{2}}{2 \sigma^{2}}\right)$$
https://seeyourmind.github.io/2022/04/11/%E4%B8%93%E9%A2%98%E5%AD%A6%E4%B9%A0/%E9%AB%98%E6%96%AF%E5%88%86%E5%B8%83/
单变量高斯分布(univariate Gaussian )