Abstract
The next POI recommendation aiming at recommending the venues that people are likely interested in has become a popular service provided by location-based social networks such as Foursquare and Gowalla. Many existing methods attempt to improve the recommendation accuracy by modeling the long- and short-term preferences of people. However, these methods learn users’ preferences only from their own historical check-in records, which leads to bad recommendation performance in sparse dataset. To this end, we propose a novel approach named long- and short-term preference learning model based on heterogeneous graph convolution network and attention mechanism (LSPHGA) for next POI recommendation. Specifically, we design a heterogeneous graph convolution network to learn the higher-order structural relations between User-POI-Categories and obtain the long-term preferences of users. As for the short-term preference, we encode the recent check-in records of users through self-attention mechanism and aggregate the short-term preference by spatio-temporal attention. Finally, the long- and short-term preference is linearly combined into a unified preference with personalized weights for different users. Extensive experiments on two real-world datasets consistently validate the effectiveness of the proposed method for improving recommendation.
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Zhou, S., Zhu, J., Xi, H., An, H. (2023). Heterogeneous Graph Based Long- And Short-Term Preference Learning Model for Next POI Recommendation. In: Meng, W., Lu, R., Min, G., Vaidya, J. (eds) Algorithms and Architectures for Parallel Processing. ICA3PP 2022. Lecture Notes in Computer Science, vol 13777. Springer, Cham. https://doi.org/10.1007/978-3-031-22677-9_24
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