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arXiv 2401.15480cs.LGcs.AIcs.MA
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社会可解释强化学习

Social Interpretable Reinforcement Learning

University of Trento(特伦托大学)

Leonardo Lucio Custode, Giovanni Iacca

AI总结:

针对可解释强化学习训练成本高的问题,提出社会可解释强化学习(SIRL),通过协作与个体两阶段模拟社会学习,在6个基准上降低43%-76%计算成本并提升收敛速度与解质量。

摘要:

强化学习(RL)有望在许多应用中带来变革。然而,由于该领域目前的大部分文献都聚焦于不透明模型,强化学习在高风险场景(其中可解释性至关重要)中的使用仍然有限。近期,一些可解释强化学习的方法(例如基于决策树的方法)已被提出,但这些技术的主要局限之一是其训练成本。为克服这一局限,我们提出了一种新方法,称为社会可解释强化学习(SIRL),该方法能大幅减少训练所需的回合数。我们的方法模拟了一种社会学习过程,其中群体中的每个智能体既基于其自身个体经验,也基于与同伴共同获得的经验来学习解决给定任务。我们的方法分为以下两个阶段。(1)在协作阶段,群体中的所有智能体与环境的共享实例交互,每个智能体观察状态并独立提出一个动作。然后,通过投票来选择实际将在环境中执行的动作。(2)在个体阶段,每个智能体通过与自身独立的环境实例交互来优化其个体表现。这一机制使智能体能够经历更多回合,而对过程的计算成本影响甚微。我们在6个广泛使用的强化学习基准上的结果表明,SIRL不仅将计算成本降低了从最低43%到最高76%的幅度,而且提高了收敛速度,并且常常改善了解决方案的质量。

英文摘要:

Reinforcement Learning (RL) bears the promise of being a game-changer in many applications. However, since most of the literature in the field is currently focused on opaque models, the use of RL in high-stakes scenarios, where interpretability is crucial, is still limited. Recently, some approaches to interpretable RL, e.g., based on Decision Trees, have been proposed, but one of the main limitations of these techniques is their training cost. To overcome this limitation, we propose a new method, called Social Interpretable RL (SIRL), that can substantially reduce the number of episodes needed for training. Our method mimics a social learning process, where each agent in a group learns to solve a given task based both on its own individual experience as well as the experience acquired together with its peers. Our approach is divided into the following two phases. (1) In the collaborative phase, all the agents in the population interact with a shared instance of the environment, where each agent observes the state and independently proposes an action. Then, voting is performed to choose the action that will actually be deployed in the environment. (2) In the individual phase, then, each agent refines its individual performance by interacting with its own instance of the environment. This mechanism makes the agents experience a larger number of episodes with little impact on the computational cost of the process. Our results (on 6 widely-known RL benchmarks) show that SIRL not only reduces the computational cost by a factor varying from a minimum of 43% to a maximum 76%, but it also increases the convergence speed and, often, improves the quality of the solutions.

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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