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arXiv 1010.0621stat.MLcs.IRcs.SIstat.AP
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用户选择的局部最优性与协同竞争过滤

Local Optimality of User Choices and Collaborative Competitive Filtering

Shuang Hong Yang

摘要:

虽然用户的偏好直接反映在她和推荐之间的交互式选择过程中,但这些丰富的信息并没有被充分利用来学习推荐模型。特别是,现有的协同过滤(CF)方法只考虑用户行为的二进制事件,但完全忽略了用户的决策是在上下文。在本文中,我们提出了协同竞争过滤(CCF),一个框架,学习用户的偏好,通过建模的选择过程中的推荐系统。CCF采用乘性潜在因子模型来表征二元效用函数。但与CF不同,CCF通过编码局部竞争效应来模拟用户的选择行为。通过这种方式,CCF允许我们利用先前在现有CF模型中与缺失数据集中在一起的二元数据。我们提出了两个配方和一个有效的大规模优化算法。三个真实世界的推荐数据集上的实验表明,CCF显着优于标准CF方法在离线和在线评估。

英文摘要:

While a user's preference is directly reflected in the interactive choice process between her and the recommender, this wealth of information was not fully exploited for learning recommender models. In particular, existing collaborative filtering (CF) approaches take into account only the binary events of user actions but totally disregard the contexts in which users' decisions are made. In this paper, we propose Collaborative Competitive Filtering (CCF), a framework for learning user preferences by modeling the choice process in recommender systems. CCF employs a multiplicative latent factor model to characterize the dyadic utility function. But unlike CF, CCF models the user behavior of choices by encoding a local competition effect. In this way, CCF allows us to leverage dyadic data that was previously lumped together with missing data in existing CF models. We present two formulations and an efficient large scale optimization algorithm. Experiments on three real-world recommendation data sets demonstrate that CCF significantly outperforms standard CF approaches in both offline and online evaluations.

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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