arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.10040cs.ROcs.LG
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用于在线深度强化学习的自适应多时间尺度合格性跟踪

Adaptive and Multiple Time-scale Eligibility Traces for Online Deep Reinforcement Learning

Nara Institute of Science and Technology(奈良先端科学技术大学院大学)

Taisuke Kobayashi

摘要:

深度强化学习(DRL)是一种很有前途的方法来教机器人执行复杂的任务。由于直接重用存储的经验数据的方法不能跟踪环境的变化,在机器人问题与时变环境,在线DRL是必需的。资格迹方法是众所周知的在线学习技术,用于提高传统强化学习中的样本效率,使用线性回归而不是DRL。深度神经网络参数之间的依赖性会破坏资格痕迹,这就是它们没有与DRL集成的原因。虽然用最有影响力的梯度替换梯度而不是将梯度累积为资格迹线可以缓解这个问题,但是替换操作减少了先前经验的重用次数。为了解决这些问题,本研究提出了一种新的资格痕迹的方法,即使在日间行车灯,同时保持高样本效率。当累积梯度与使用最新参数计算的梯度不同时,所提出的方法考虑到过去和最新参数之间的发散,以自适应地衰减资格迹。由于过去和最新参数之间的发散的不可行的计算成本,利用由过去和最新参数计算的输出之间的Bregman发散。此外,首次设计了一种多时间尺度轨迹的广义方法。该设计允许替换最有影响力的自适应累积(衰减)资格迹线。

英文摘要:

Deep reinforcement learning (DRL) is one promising approach to teaching robots to perform complex tasks. Because methods that directly reuse the stored experience data cannot follow the change of the environment in robotic problems with a time-varying environment, online DRL is required. The eligibility traces method is well known as an online learning technique for improving sample efficiency in traditional reinforcement learning with linear regressors rather than DRL. The dependency between parameters of deep neural networks would destroy the eligibility traces, which is why they are not integrated with DRL. Although replacing the gradient with the most influential one rather than accumulating the gradients as the eligibility traces can alleviate this problem, the replacing operation reduces the number of reuses of previous experiences. To address these issues, this study proposes a new eligibility traces method that can be used even in DRL while maintaining high sample efficiency. When the accumulated gradients differ from those computed using the latest parameters, the proposed method takes into account the divergence between the past and latest parameters to adaptively decay the eligibility traces. Bregman divergences between outputs computed by the past and latest parameters are exploited due to the infeasible computational cost of the divergence between the past and latest parameters. In addition, a generalized method with multiple time-scale traces is designed for the first time. This design allows for the replacement of the most influential adaptively accumulated (decayed) eligibility traces.

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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