arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1905.01546cs.IRcs.LGcs.SI
收藏

潜在的意外和有用的建议

Latent Unexpected and Useful Recommendation

New York University(纽约大学);Stern School of Business(斯特恩商学院)

Pan Li, Alexander Tuzhilin

摘要:

提供意外推荐是推荐系统的一项重要任务。为此,我们需要从用户的期望出发,在推荐商品时偏离这些期望。以前提出的方法在特征空间中对用户期望进行建模,使其仅限于用户访问过的项目或通过相关规则的推导而预期的项目,而不包括用户也可以从用户,项目和实体之间的潜在的,复杂的和异构的交互中预期的项目。在本文中,我们定义的潜在空间,而不是在特征空间的意外,并开发了一种新的潜在凸包(LCH)方法提供意想不到的建议。在两个真实数据集上进行的大量实验表明,所提出的模型在实现相同准确度的同时,在意外度量方面显著优于其他最先进的意外推荐方法。

英文摘要:

Providing unexpected recommendations is an important task for recommender systems. To do this, we need to start from the expectations of users and deviate from these expectations when recommending items. Previously proposed approaches model user expectations in the feature space, making them limited to the items that the user has visited or expected by the deduction of associated rules, without including the items that the user could also expect from the latent, complex and heterogeneous interactions between users, items and entities. In this paper, we define unexpectedness in the latent space rather than in the feature space and develop a novel Latent Convex Hull (LCH) method to provide unexpected recommendations. Extensive experiments on two real-world datasets demonstrate the effectiveness of the proposed model that significantly outperforms alternative state-of-the-art unexpected recommendation methods in terms of unexpectedness measures while achieving the same level of accuracy.

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。

↑