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arXiv 1208.0984cs.LG
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APRIL:基于主动偏好学习的强化学习

APRIL: Active Preference-learning based Reinforcement Learning

CNRS(法国国家科学研究中心);INRIA(法国国家信息与自动化研究所);Université Paris-Sud(巴黎第十一大学)

Riad Akrour, Marc Schoenauer, Michèle Sebag

摘要:

本文主要研究有限先验知识下的强化学习。例如,在群体机器人领域,专家很难设计奖励函数或演示目标行为,禁止使用标准RL和反向强化学习。虽然专业知识有限,但人类专家仍然经常能够发出偏好并对代理演示进行排名。早期的工作提出了一个迭代的基于偏好的RL框架:专家的偏好被用来学习一个近似的策略返回,从而使代理实现直接的策略搜索。迭代地,代理选择一个新的候选策略,并演示它;专家排名新的演示相对于以前的最佳之一;专家的排名反馈,使代理细化近似的政策回报,并迭代的过程。在本文中,基于偏好的强化学习结合主动排名,以减少排名查询的专家需要产生一个令人满意的政策。在山地车和癌症治疗试验台上的实验证明,几十个排名可以帮助我们学习一个有能力的政策。

英文摘要:

This paper focuses on reinforcement learning (RL) with limited prior knowledge. In the domain of swarm robotics for instance, the expert can hardly design a reward function or demonstrate the target behavior, forbidding the use of both standard RL and inverse reinforcement learning. Although with a limited expertise, the human expert is still often able to emit preferences and rank the agent demonstrations. Earlier work has presented an iterative preference-based RL framework: expert preferences are exploited to learn an approximate policy return, thus enabling the agent to achieve direct policy search. Iteratively, the agent selects a new candidate policy and demonstrates it; the expert ranks the new demonstration comparatively to the previous best one; the expert's ranking feedback enables the agent to refine the approximate policy return, and the process is iterated. In this paper, preference-based reinforcement learning is combined with active ranking in order to decrease the number of ranking queries to the expert needed to yield a satisfactory policy. Experiments on the mountain car and the cancer treatment testbeds witness that a couple of dozen rankings enable to learn a competent policy.

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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