25/07/2020

Neural hierarchical factorization machines for user’s event sequence analysis

Dongbo Xi, Fuzhen Zhuang, Bowen Song, Yongchun Zhu, Shuai Chen, Dan Hong, Tao Chen, Xi Gu, Qing He

Keywords: sequence representation, event sequence analysis, neural hierarchical factorization machines, event representation

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Abstract: Many prediction tasks of real-world applications need to model multi-order feature interactions in user’s event sequence for better detection performance. However, existing popular solutions usually suffer two key issues: 1) only focusing on feature interactions and failing to capture the sequence influence; 2) only focusing on sequence information, but ignoring internal feature relations of each event, thus failing to extract a better event representation. In this paper, we consider a two-level structure for capturing the hierarchical information over user’s event sequence: 1) learning effective feature interactions based event representation; 2) modeling the sequence representation of user’s historical events. Experimental results on both industrial and public datasets clearly demonstrate that our model achieves significantly better performance compared with state-of-the-art baselines.

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