unit variance 方差为1
unit variance Gaussian 标准正太分布 高斯分布
conditionally independent 条件独立
evidence lower bound
The ELBO is an approximation to the evidence (sometimes called
the marginal likelihood). It tends to be a better approximation then
BIC, but even if it is very accurate you have to deal with the subtleties
of the evidence itself. For that see the numerous relevant posts on
this list as well as the discussion in Bayesian Data Analysis.
边际似然函数下界
