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| Self-Distillation Multi-task Learning Integrating Multi-dimensional Perception for Multimodal Sequential Recommendation |
| TANG Zhe1, PANG Jifang1,2, XIE Yu1,2, WANG Zhiqiang1,2 |
1. School of Computer and Information Technology, Shanxi University, Taiyuan 030006; 2. Key Laboratory of Computational Intelligence and Chinese Information Processing of Ministry of Education, Shanxi University, Taiyuan 030006 |
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Abstract As an important application scenario of recommendation systems, multimodal sequential recommendation is a research focus in both industry and academia. However, existing multi-task learning approaches for multimodal sequential recommendation fail to fully consider the high-order relationships within modalities and the enhanced effect of short-term sequences of users. Consequently, these approaches exhibit a low degree of personalization due to their weak semantic representations and interest modeling. To address this issue, an approach for self-distillation multi-task learning integrating multi-dimensional perception for multimodal sequential recommendation(SD-MTMP) is proposed. First, based on the extraction of topics from user reviews, high-order semantic correlations in user groups and item collections are modeled respectively by constructing user-topic and item-topic hypergraphs. The topic-aware representations of nodes are generated through hypergraph convolution. Simultaneously, a weighted bipartite graph is built based on the user-item rating matrix to generate rating-aware representations of nodes. Second, a cross-modal self-distillation auxiliary task is designed to achieve semantic alignment by transferring knowledge from topic-aware representations to rating-aware representations. Additionally, a dual-aware attention mechanism is established by comprehensively considering the effects of user ratings and time intervals on short-term sequences to accurately model short-term interests of users. On the basis of the above, a multi-task learning strategy is proposed for multimodal sequential recommendation. It jointly optimizes the recommendation loss and the self-distillation loss, thereby further enhancing the semantic expressiveness of representations and improving recommendation performance. Finally, experiments on three public datasets demonstrate the effectiveness of SD-MTMP.
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Received: 16 July 2025
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| Fund:National Natural Science Foundation of China(No.62472270,62272285,72171137), Fundamental Research Program of Shanxi Province(No.202403021221021) |
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Corresponding Authors:
PANG Jifang, Ph.D., associate professor. Her research interests include recommender system and intelligent decision.
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About author:: TANG Zhe, Master student. Her research interests include recommender system. XIE Yu, Ph.D., associate professor. His research interests include machine learning. WANG Zhiqiang, Ph.D., associate professor. His research interests include machine learning, data mining and network big data analysis. |
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