The distributionally robust Markov Decision Process (MDP) approach asks for a
distributionally robust policy that achieves the maximal expected total reward
under the most adversarial distribution of uncertain parameters. In this paper,
we study distributionally robust MDPs where ambiguity sets for the uncertain
parameters are of a format that can easily incorporate in its description the
uncertainty's generalized moment as well as statistical distance information.
In this way, we generalize existing works on distributionally robust MDP with
generalized-moment-based and statistical-distance-based ambiguity sets to
incorporate information from the former class such as moments and dispersions
to the latter class that critically depends on empirical observations of the
uncertain parameters. We show that, under this format of ambiguity sets, the
resulting distributionally robust MDP remains tractable under mild technical
conditions. To be more specific, a distributionally robust policy can be
constructed by solving a sequence of one-stage convex optimization subproblems.

该研究探讨了在不确定参数的最具对抗性分布下，实现最大期望总回报的分布鲁棒 MDP，通过在模糊集格式中加入不确定性的广义矩和统计距离信息，将泛化动量和统计距离模糊集的现有研究推广到后者类别，进而提出了一种新的描述不确定性空间的模糊集形式。在此模糊集形式下，当满足一些温和的技术条件时，可以通过解决一系列一阶凸优化子问题来构建一份分布鲁棒策略。