Abstract
Session-based recommendation aims to predict the next item to be interacted by a specific type of behavior (e.g., click or purchase) within a session. However, the main challenge comes from the lack of interactions in the target behavior. Despite state-of-the-art approaches aim to alleviate this issue by incorporating auxiliary behaviors through multi-behavior modeling, they are still weak in supporting cold-start recommendation due to the limited generalization ability. Having witnessed the effectiveness of meta-optimized models for few-shot learning, in this paper, we propose a memory-augmented meta-learning framework for session-based target behavior recommendation. It adopts meta-learning to learn well-generalized global sharing initialization parameters for all sessions, and derives personalized local parameters for each session through fine-tuning. Particularly, we first extract multi-behavior characteristics to derive dynamic user intentions within a session. Then we apply soft-clustering in meta-learning based on well-designed memory structures, so that multi-behavior sessions with similar intention could share related knowledge. The experimental results on two datasets show that our MMFSR model effectively outperforms the state-of-the-art methods.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China under Grant Nos. 61872258, 61802273, Major project of natural science research in Universities of Jiangsu Province under grant number 20KJA520005.
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This article belongs to the Topical Collection: Special Issue on Decision Making in Heterogeneous Network Data Scenarios and Applications
Guest Editors: Jianxin Li, Chengfei Liu, Ziyu Guan, and Yinghui Wu.
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Yu, B., Li, X., Fang, J. et al. Memory-augmented meta-learning framework for session-based target behavior recommendation. World Wide Web 26, 233–251 (2023). https://doi.org/10.1007/s11280-022-01036-z
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DOI: https://doi.org/10.1007/s11280-022-01036-z