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arXiv 0902.0392stat.MLcs.LG
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贝叶斯RL探索的树探索

Tree Exploration for Bayesian RL Exploration

EPFL(洛桑联邦理工学院)

Christos Dimitrakakis

摘要:

强化学习的研究已经产生了两种主要类型的不确定性下的最优决策算法。第一种方法采用贝叶斯框架,最优性随着计算时间的增加而提高。这是因为所得到的规划任务采用具有无限数量的状态的信念树上的动态规划问题的形式。第二种类型采用相对简单的算法,这被证明是遭受小遗憾的分布自由的框架内。本文给出了贝叶斯信念树中节点的最优值函数的一个下界和一个高概率上界,它们类似于POMDPs中的类似界。然后使用边界来创建更有效的策略来探索树。所得到的算法进行比较与分布免费算法UCB 1,以及一个更简单的基线算法多臂强盗问题。

英文摘要:

Research in reinforcement learning has produced algorithms for optimal decision making under uncertainty that fall within two main types. The first employs a Bayesian framework, where optimality improves with increased computational time. This is because the resulting planning task takes the form of a dynamic programming problem on a belief tree with an infinite number of states. The second type employs relatively simple algorithm which are shown to suffer small regret within a distribution-free framework. This paper presents a lower bound and a high probability upper bound on the optimal value function for the nodes in the Bayesian belief tree, which are analogous to similar bounds in POMDPs. The bounds are then used to create more efficient strategies for exploring the tree. The resulting algorithms are compared with the distribution-free algorithm UCB1, as well as a simpler baseline algorithm on multi-armed bandit problems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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