arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.03544cs.LGcs.AIcs.IRstat.ML
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基于上下文的强盗聚类研究

On Context-Dependent Clustering of Bandits

University of Insubria(因苏布里亚大学);University of Cambridge(剑桥大学);IIT Kanpur(坎普尔印度理工学院);Telefonica Research(西班牙电信研究院);Amazon Berlin(亚马逊柏林)

Claudio Gentile, Shuai Li, Purushottam Kar, Alexandros Karatzoglou, Evans Etrue, Giovanni Zappella

摘要:

我们研究了一种新的集群的强盗算法CAB的协同推荐任务,实现了底层的反馈共享机制,通过估计在上下文相关的方式用户的邻域。CAB通过将协作效应纳入推理以及以无缝交错探索-利用权衡和协作步骤的方式进行学习过程,从而与最先进的方法截然不同。我们证明了遗憾的界限下的各种假设的数据,表现出明确的依赖于预期数量的集群超过用户,一个自然的衡量统计难度的学习任务。在生产和真实世界数据集上的实验表明,CAB相对于具有代表性的最先进的方法池提供了显着提高的预测性能。

英文摘要:

We investigate a novel cluster-of-bandit algorithm CAB for collaborative recommendation tasks that implements the underlying feedback sharing mechanism by estimating the neighborhood of users in a context-dependent manner. CAB makes sharp departures from the state of the art by incorporating collaborative effects into inference as well as learning processes in a manner that seamlessly interleaving explore-exploit tradeoffs and collaborative steps. We prove regret bounds under various assumptions on the data, which exhibit a crisp dependence on the expected number of clusters over the users, a natural measure of the statistical difficulty of the learning task. Experiments on production and real-world datasets show that CAB offers significantly increased prediction performance against a representative pool of state-of-the-art methods.

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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