Density Ratio

Density Ratio Estimation with Stein Displacement Fields: Unifying Density Ratios and Dynamical Transport

利用 Stein 位移場進行密度比估計：連結統計與動態分布轉移

This paper parametrizes log-density ratios as Stein operators acting on displacement fields, solving distribution shifts as a single convex optimization problem with dual statistical and dynamical descriptions.