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arXiv 2603.02100cs.LG
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具有有限控制变量的随机多臂老虎机

Stochastic Multi-Armed Bandits with Limited Control Variates

Singapore-MIT Alliance for Research(新加坡-麻省理工联合研究与技术中心);Technology Centre(技术中心);Department of IEOR Indian Institute of Technology Bombay(工业工程与运营研究系印度理工学院班加罗尔);Department of DSAI Indian Institute of Technology Madras(数据科学与人工智能系印度理工学院马德拉斯)

Arun Verma, Manjesh Kumar Hanawal, Arun Rajkumar

AI总结:

本文提出UCB-LCV算法,用于处理有限控制变量的随机多臂老虎机问题,通过结合奖励和控制变量估计器,提升性能并适用于一般分布。

摘要:

受无线网络中干扰或信道状态估计提供部分吞吐量洞察的启发,我们研究了一种经典随机多臂老虎机问题的变种,其中学习者对辅助信息的访问有限。最近的研究表明,当控制变量可用时,可以利用这些辅助信息获得更紧的置信区间,从而降低遗憾。然而,现有研究假设控制变量在每一轮都可用,这在现实生活中可能不切实际。为此,我们提出了UCB-LCV,一种基于上置信界(UCB)的算法,有效结合了来自奖励和控制变量获得的估计器。当没有控制变量时,UCB-LCV导致一种新的算法,我们称之为UCB-NORMAL,其在标准MAB设置中表现优于现有算法。最后,我们讨论了适用于一般分布的UCB-LCV变种,并通过实验表明UCB-LCV在现有老虎机算法中表现更优。

英文摘要:

Motivated by wireless networks where interference or channel state estimates provide partial insight into throughput, we study a variant of the classical stochastic multi-armed bandit problem in which the learner has limited access to auxiliary information. Recent work has shown that such auxiliary information, when available as control variates, can be used to get tighter confidence bounds, leading to lower regret. However, existing works assume that control variates are available in every round, which may not be realistic in several real-life scenarios. To address this, we propose UCB-LCV, an upper confidence bound (UCB) based algorithm that effectively combines the estimators obtained from rewards and control variates. When there is no control variate, UCB-LCV leads to a novel algorithm that we call UCB-NORMAL, outperforming its existing algorithms for the standard MAB setting with normally distributed rewards. Finally, we discuss variants of the proposed UCB-LCV that apply to general distributions and experimentally demonstrate that UCB-LCV outperforms existing bandit algorithms.

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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