p_bar(x) = p(x,e)
p(x) is p(x|e)
p_bar is hard to estimate,
but p(x) is easy
and p(x) \propotion p_bar
q is easier for sampling, while we cant sample from p
Occam‘s Razor???
原文地址:https://www.cnblogs.com/ecoflex/p/10259391.html
时间: 2024-10-05 23:25:39