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arXiv 1303.0485cs.IR
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上下文感知推荐系统中探索/利用权衡效用函数的优化

Optimizing an Utility Function for Exploration / Exploitation Trade-off in Context-Aware Recommender System

Djallel Bouneffouf

摘要:

在本文中,我们开发了一个动态的探索/开发(exr/exp)策略的上下文推荐系统(CRS)。具体来说,我们的方法可以通过自动学习最佳权衡来自适应地平衡exr/exp的两个方面。这包括优化效用函数,该效用函数由已经推荐的点击和未点击文档的奖励的概率分布的线性化形式表示。在离线模拟框架内,我们将我们的算法应用于CRS,并使用真实的事件日志数据进行评估。实验结果和详细的分析表明,我们的算法优于现有的算法的点击率(CTR)。

英文摘要:

In this paper, we develop a dynamic exploration/ exploitation (exr/exp) strategy for contextual recommender systems (CRS). Specifically, our methods can adaptively balance the two aspects of exr/exp by automatically learning the optimal tradeoff. This consists of optimizing a utility function represented by a linearized form of the probability distributions of the rewards of the clicked and the non-clicked documents already recommended. Within an offline simulation framework we apply our algorithms to a CRS and conduct an evaluation with real event log data. The experimental results and detailed analysis demonstrate that our algorithms outperform existing algorithms in terms of click-through-rate (CTR).

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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