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