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Hybrid point-of-interest recommendation model based on geographic preference ranking
Shijie PENG, Hongmei CHEN, Lizhen WANG, Qing XIAO
Journal of Computer Applications    2023, 43 (8): 2448-2455.   DOI: 10.11772/j.issn.1001-9081.2022071029
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With the development of Location-Based Social Network (LBSN) Point-Of-Interest (POI) recommendation, an effective way to alleviate information overload, has attracted much attention. As user check-in data are implicit feedback data and very sparse, a hybrid POI recommendation model based on geographic preference ranking was proposed to effectively capture the user preference for POIs from check-in data. First, considering the implicit feedback characteristics of check-in data and the spatial constraint of user activities, by calculating the influence of POI distances on POI ranking based on the traditional Bayesian personalized Ranking (BPR) model, a weighted BPR model named GWBPR (Geo-Weighted Bayesian Personalized Ranking) was proposed. Then, aiming at the sparsity of user check-in data, by further integrating Logistic Matrix Factorization (LMF) model with GWBPR model, a hybrid model GWBPR-LMF (GWBPR with LMF) was proposed. Experimental results on two real datasets, Foursquare and Gowalla, show that GWBPR-LMF model outperforms the comparison models like BPR, LMF and SAE-NAD (Self-Attentive Encoder and Neighbor-Aware Decoder). Compared with the relatively good-performance model SAE-NAD, GWBPR-LMF model improves the precision, recall, F1 score, mean Average Precision (mAP) and Normalized Discounted Cumulative Gain (NDCG) by 44.9%, 57.1%, 78.4%, 55.3%, and 40.0% averagely and respectively on Foursquare dataset, and 3.0%, 6.4%, 4.6%, 11.7%, and 4.2% averagely and respectively on Gowalla dataset.

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