Abstract
Predicting the next interaction item in the session-based recommendation system is an emerging and challenging research task. Existing studies model a session as a sequence or graph of items for predicting the next-click item. However, these approaches ignore the global graph-based relations between the session items and the local neighborhood-based item relevance to external knowledge bases, thus fail to encode rich semantic knowledge between items for achieving comprehensive and accurate recommendations. To overcome the current shortcomings, we proposed a novel knowledge graph augmented model called SEGAR (Knowledge Graph Augmented Session-based Recommendation) by leveraging graph convolutional network and knowledge graph attention network. When integrating the static local attributes and the knowledge about all the last session items encoded in their k-hop neighborhoods in the knowledge graph, SEGAR models all sessions as a session graph and captures the dynamic global temporal and popularity-aware information from the session context. The model encodes a comprehensive semantic knowledge between items for achieving more accurate recommendation. Extensive experiments on two benchmark datasets show that SEGAR outperforms four state-of-the-art models on the session-based recommendation task.
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The work was supported by Key Technologies Research and Development Program of China (2017YFC0405805-04) and Basal Research Fund of China (2018B57614).
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Xu, X., Tang, Y., Xu, Z. (2021). SEGAR: Knowledge Graph Augmented Session-Based Recommendation. In: Qiu, H., Zhang, C., Fei, Z., Qiu, M., Kung, SY. (eds) Knowledge Science, Engineering and Management. KSEM 2021. Lecture Notes in Computer Science(), vol 12815. Springer, Cham. https://doi.org/10.1007/978-3-030-82136-4_19
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DOI: https://doi.org/10.1007/978-3-030-82136-4_19
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