RAT: Retrieval-Augmented Transformer for Click-Through Rate Prediction

作     者：Li, Yushen Wang, Jinpeng Dai, Tao Zhu, Jieming Yuan, Jun Zhang, Rui Xia, Shu-Tao 

作者机构：Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen China College of Computer Science and Software Engineering Shenzhen University Shenzhen China Huawei Noah's Ark Lab Shenzhen China Shenzhen China Research Center of Artificial Intelligence Peng Cheng Laboratory Shenzhen China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Forecasting 

摘      要：Predicting click-through rates (CTR) is a fundamental task for Web applications, where a key issue is to devise effective models for feature interactions. Current methodologies predominantly concentrate on modeling feature interactions within an individual sample, while overlooking the potential cross-sample relationships that can serve as a reference context to enhance the prediction. To make up for such deficiency, this paper develops a RetrievalAugmented Transformer (RAT), aiming to acquire fine-grained feature interactions within and across samples. By retrieving similar samples, we construct augmented input for each target sample. We then build Transformer layers with cascaded attention to capture both intra- and cross-sample feature interactions, facilitating comprehensive reasoning for improved CTR prediction while retaining efficiency. Extensive experiments on real-world datasets substantiate the effectiveness of RAT and suggest its advantage in long-tail scenarios. The code has been open-sourced at https://***/YushenLi807/WWW24-RAT. © 2024, CC BY.