arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.08247cs.IRcs.AIcs.CLcs.HC
收藏

利用历史交互数据改进会话式推荐系统

Leveraging Historical Interaction Data for Improving Conversational Recommender System

School of Information, Renmin University of China(中国人民大学信息学院);Gaoling School of Artificial Intelligence, Renmin University of China(中国人民大学高瓴人工智能学院);Beijing Key Laboratory of Big Data Management and Analysis Methods(大数据管理与分析方法北京市重点实验室);Meituan-Dianping Group(美团点评集团)

Kun Zhou, Wayne Xin Zhao, Hui Wang, Sirui Wang, Fuzheng Zhang, Zhongyuan Wang, Ji-Rong Wen

摘要:

近年来,会话式推荐系统(CRS)已经成为一个新兴的和实用的研究课题。大多数现有的CRS方法专注于从会话数据中学习用户的有效偏好表示。同时,我们采取了一个新的视角来利用历史交互数据来改善CRS。为此,我们提出了一种新的预训练方法,通过预训练方法整合基于项目的偏好序列(来自历史交互数据)和基于属性的偏好序列(来自会话数据)。我们精心设计了两个预训练任务,以加强基于项目和属性的偏好之间的信息融合。为了提高学习性能,我们进一步开发了一个有效的负样本生成器,可以产生高质量的负样本。在两个真实数据集上的实验结果证明了该方法对CRS的有效性。

英文摘要:

Recently, conversational recommender system (CRS) has become an emerging and practical research topic. Most of the existing CRS methods focus on learning effective preference representations for users from conversation data alone. While, we take a new perspective to leverage historical interaction data for improving CRS. For this purpose, we propose a novel pre-training approach to integrating both item-based preference sequence (from historical interaction data) and attribute-based preference sequence (from conversation data) via pre-training methods. We carefully design two pre-training tasks to enhance information fusion between item- and attribute-based preference. To improve the learning performance, we further develop an effective negative sample generator which can produce high-quality negative samples. Experiment results on two real-world datasets have demonstrated the effectiveness of our approach for improving CRS.

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。

↑