Information Directed Sampling for Sparse Linear Bandits
Information Directed Sampling for Sparse Linear Bandits
复制标题
稀疏线性老虎机的信息定向采样
DOI:
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Wei Deng
中科院分区:
文献类型:
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作者:
Botao Hao;Tor Lattimore;Wei Deng
Stochastic sparse linear bandits offer a practical model for high-dimensional online decision-making problems and have a rich information-regret structure. In this work we explore the use of information-directed sampling (IDS), which naturally balances the information-regret trade-off. We develop a class of information-theoretic Bayesian regret bounds that nearly match existing lower bounds on a variety of problem instances, demonstrating the adaptivity of IDS. To efficiently implement sparse IDS, we propose an empirical Bayesian approach for sparse posterior sampling using a spike-and-slab Gaussian-Laplace prior. Numerical results demonstrate significant regret reductions by sparse IDS relative to several baselines.
影响因子:
9.7
作者:
Tao, Le;Qiu, Jianxin;Yeh, Shuyuan
通讯作者:
Yeh, Shuyuan