arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.10021cs.LGstat.ML
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Deep Q代理学习的表示有多可转移?

How Transferable are the Representations Learned by Deep Q Agents?

Carnegie Mellon University(卡内基梅隆大学);Machine Learning Department(机器学习系)

Jacob Tyo, Zachary Lipton

摘要:

在本文中,我们考虑了深度强化学习(DRL)的样本复杂度的来源,询问有多少来自学习环境状态的有用表示的需求,有多少是由于学习策略的样本复杂度。虽然对于DRL代理,表示和策略之间的区别可能不清楚,我们通过一组迁移学习实验寻求新的见解。在每个实验中,我们保留了在同一个游戏或相关游戏上训练的一部分层,比较了迁移学习和从头开始学习策略的好处。有趣的是,我们发现,由于转移的好处是高度可变的一般和非对称的任务对。我们的实验表明,也许从更简单的环境中转移可以提高更复杂的下游任务的性能,并且根据环境,学习有用表示的要求可以从忽略不计到样本复杂性的大部分。此外,我们发现微调通常优于冻结传输层的训练,证实了在分类设置中首次注意到的见解。

英文摘要:

In this paper, we consider the source of Deep Reinforcement Learning (DRL)'s sample complexity, asking how much derives from the requirement of learning useful representations of environment states and how much is due to the sample complexity of learning a policy. While for DRL agents, the distinction between representation and policy may not be clear, we seek new insight through a set of transfer learning experiments. In each experiment, we retain some fraction of layers trained on either the same game or a related game, comparing the benefits of transfer learning to learning a policy from scratch. Interestingly, we find that benefits due to transfer are highly variable in general and non-symmetric across pairs of tasks. Our experiments suggest that perhaps transfer from simpler environments can boost performance on more complex downstream tasks and that the requirements of learning a useful representation can range from negligible to the majority of the sample complexity, based on the environment. Furthermore, we find that fine-tuning generally outperforms training with the transferred layers frozen, confirming an insight first noted in the classification setting.

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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