Enhancing Knowledge of Propagation-Perception-Based Attention Recommender Systems

Researchers have introduced side information such as social networks or knowledge graphs to alleviate the problems of data sparsity and cold starts in recommendation systems. However, most of the methods ignore the exploration of feature differentiation aspects in the knowledge propagation process....

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Veröffentlicht in:Electronics (Basel) 2022-02, Vol.11 (4), p.547
Hauptverfasser: Zhang, Hanzhong, Wang, Yinglong, Chen, Chao, Liu, Ruixia, Zhou, Shuwang, Gao, Tianlei
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Sprache:eng
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Zusammenfassung:Researchers have introduced side information such as social networks or knowledge graphs to alleviate the problems of data sparsity and cold starts in recommendation systems. However, most of the methods ignore the exploration of feature differentiation aspects in the knowledge propagation process. To solve the above problem, we propose a new attention recommendation method based on an enhanced knowledge propagation perception. Specifically, to capture user preferences in a fine-grained manner in a knowledge graph, an asymmetric semantic attention mechanism is adopted. It identifies the influence of propagation neighbors on user preferences through a more precise representation of the preference semantics for head and tail entities. Furthermore, in consideration of the memory and generalization of different propagation depth features and adaptively adjusting the propagation weights, a new propagation feature exploration framework is designed. The performance of the proposed model is validated by two real-world datasets. The baseline model averagely increases by 9.65% and 9.15% for the Area Under Curve (AUC) and Accuracy (ACC) indicators, which proves the effectiveness of the model.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics11040547