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arXiv 2402.05002cs.LG
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随机部分监测的随机置信界

Randomized Confidence Bounds for Stochastic Partial Monitoring

Canada CIFAR AI Chair(加拿大CIFAR人工智能主席);Mila - Québec AI Institute(魁北克人工智能研究所);Thales Digital Solutions (cortAIx lab)(泰勒斯数字解决方案(cortAIx实验室))

Maxime Heuillet, Ola Ahmad, Audrey Durand

AI总结:

研究随机结果下的上下文和非上下文部分监测设置,基于确定性置信界随机化引入新策略,扩展遗憾保证,实验表明新策略在多个PM博弈中性能良好,还设计了监测分类系统错误率的用例。

摘要:

部分监测(PM)框架为具有不完整反馈的序贯学习问题提供了理论表述。每一轮,学习智能体采取行动,环境同时选择一个结果。智能体随后观察到一个仅部分告知(未观察到的)结果的反馈信号。智能体利用接收到的反馈信号选择行动,以最小化(未观察到的)累积损失。在上下文PM中,结果取决于智能体在每轮选择行动之前可观察到的一些辅助信息。本文考虑具有随机结果的上下文和非上下文PM设置。我们基于确定性置信界的随机化引入了一类新的PM策略。我们还将遗憾保证扩展到现有随机策略不适用的设置。我们的实验表明,所提出的RandCBP和RandCBPsidestar策略在多个PM博弈中相对于最先进的基线具有良好的性能。为倡导采用PM框架,我们针对监测任何已部署分类系统的错误率这一现实世界问题设计了一个用例。

英文摘要:

The partial monitoring (PM) framework provides a theoretical formulation of sequential learning problems with incomplete feedback. On each round, a learning agent plays an action while the environment simultaneously chooses an outcome. The agent then observes a feedback signal that is only partially informative about the (unobserved) outcome. The agent leverages the received feedback signals to select actions that minimize the (unobserved) cumulative loss. In contextual PM, the outcomes depend on some side information that is observable by the agent before selecting the action on each round. In this paper, we consider the contextual and non-contextual PM settings with stochastic outcomes. We introduce a new class of PM strategies based on the randomization of deterministic confidence bounds. We also extend regret guarantees to settings where existing stochastic strategies are not applicable. Our experiments show that the proposed RandCBP and RandCBPsidestar strategies have favorable performance against state-of-the-art baselines in multiple PM games. To advocate for the adoption of the PM framework, we design a use case on the real-world problem of monitoring the error rate of any deployed classification system.

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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