Self-supervised Dual Hypergraph learning with Intent Disentanglement for session-based recommendation

doi:10.1016/j.knosys.2023.110528

2023-06-01

PRE

DOI：10.1016/j.knosys.2023.110528

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摘要

En 中文

Existing works on session-based recommendation have shown the advantage in enhancing the prediction ability of recommendation with various deep learning techniques. However, the following challenges need to be addressed: (1) the hierarchy of item transition patterns is overlooked; (2) existing works fail to distinguish various factors of item transition within a single session for disentangling user intents. To cope with the above challenges, we propose a novel session based recommendation model called Self-supervised Dual Hypergraph learning with Intent Disentanglement model (SDHID). Specifically, we first propose a disentangled capsule hypergraph convolutional channel for ne-grained intent learning to capture the intra-session pattern. Accordingly, we introduce the hypergraph and capsule networks in disentangling to learn the item embedding for different factors, and then the representation of the intra-session pattern is obtained by aggregating item embedding with attention weights. Moreover, we build a novel dual-primal hypergraph convolutional channel by mapping the hypergraph to a dual-primal graph for learning the item transition pattern of intersession. In addition, the above two channels are combined into a self-supervised contrastive learning framework by maximizing mutual information between the learned session representations. We unify the recommendation and the self-supervised tasks under a primary and auxiliary learning framework. The combined optimization of two tasks leads to a hierarchical joint learning item transition for intraand inter-session. Extensive experiments on real datasets show that the proposed model outperforms several state-of-the-art models.

Keyword:

Self -supervised learning

Hypergraph convolutional network

Capsule network

Self -attention mechanism

Recommendation system

Deep learning