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arXiv 2011.06631cs.LGcs.AI
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情景强化学习的稳态分析

Steady State Analysis of Episodic Reinforcement Learning

Rakuten Institute of Technology(乐天技术研究所)

Huang Bojun

摘要:

本文证明了在任何行为策略下,每个有限时域决策任务的情景学习环境都具有唯一的稳态,并且在基本上所有的情景学习过程中,智能体输入的边际分布确实收敛于稳态分布。这一观察结果支持了一种与传统观点相反的有趣的思维方式:虽然在持续学习中经常假设存在独特的稳态,但在情景学习中却被认为不太相关,但事实证明,它们的存在对后者来说是有保证的。基于这一认识,本文围绕这两种强化学习形式主义中分别对待的几个重要概念,统一了情景强化学习和连续强化学习。在实践中,存在唯一的和可接近的稳定状态,使一个一般的方法来收集数据的情景RL任务,本文适用于策略梯度算法作为示范,基于一个新的稳态策略梯度定理。最后,本文还提出并实验验证了一种扰动方法,有利于在现实世界的RL任务的快速稳态收敛。

英文摘要:

This paper proves that the episodic learning environment of every finite-horizon decision task has a unique steady state under any behavior policy, and that the marginal distribution of the agent's input indeed converges to the steady-state distribution in essentially all episodic learning processes. This observation supports an interestingly reversed mindset against conventional wisdom: While the existence of unique steady states was often presumed in continual learning but considered less relevant in episodic learning, it turns out their existence is guaranteed for the latter. Based on this insight, the paper unifies episodic and continual RL around several important concepts that have been separately treated in these two RL formalisms. Practically, the existence of unique and approachable steady state enables a general way to collect data in episodic RL tasks, which the paper applies to policy gradient algorithms as a demonstration, based on a new steady-state policy gradient theorem. Finally, the paper also proposes and experimentally validates a perturbation method that facilitates rapid steady-state convergence in real-world RL tasks.

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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