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arXiv 1107.0042cs.AI
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限制值迭代:理论与算法

Restricted Value Iteration: Theory and Algorithms

Washington University(华盛顿大学);Hong Kong University of Science & Technology(香港科技大学)

N. L. Zhang, W. Zhang

摘要:

值迭代是一种寻找POMDPs近似最优策略的常用算法。由于需要考虑整个置信空间,这需要解决大量的线性规划,因此效率低下。本文研究了限制于信念子集的值迭代问题。我们表明,连同适当选择的信念子集,限制值迭代产生接近最优的政策,我们给出了一个条件,以确定是否一个给定的信念子集将带来节省空间和时间。我们还将限制值迭代应用于两类有趣的POMDPs,即信息POMDPs和近可辨别的POMDPs。

英文摘要:

Value iteration is a popular algorithm for finding near optimal policies for POMDPs. It is inefficient due to the need to account for the entire belief space, which necessitates the solution of large numbers of linear programs. In this paper, we study value iteration restricted to belief subsets. We show that, together with properly chosen belief subsets, restricted value iteration yields near-optimal policies and we give a condition for determining whether a given belief subset would bring about savings in space and time. We also apply restricted value iteration to two interesting classes of POMDPs, namely informative POMDPs and near-discernible POMDPs.

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