计算机科学 ›› 2022, Vol. 49 ›› Issue (11A): 210800149-5.doi: 10.11896/jsjkx.210800149
蔡国永, 陈心怡, 王顺杰
CAI Guo-yong, CHEN Xin-yi, WANG Shun-jie
摘要： 在基于位置社交网络(Location-based Social Network,LBSNs)的服务中,有效的兴趣点(Point-of-Interest,POI)推荐具有极大的经济和社会效用,但如何深入理解LBSN中的位置、结构和行为等相关信息,并进行推理以及实现POI推荐仍然是一项挑战性任务。针对LBSNs中的多种异构数据,提出了一种能够挖掘用户社交和POI多种特征信息的用于POI推荐的图神经网络模型——POIR-GAT。首先POIR-GAT利用社交关系构建用户-用户图,并结合用户-POI交互图共同抽取用户特征向量;其次,基于POI的不同地理特征构造不同的特征矩阵,并通过矩阵分解获得不同的潜在因子,将这些潜在因子融入POI的特征向量,以学习它们对用户行为的共同影响,并用于实现融合社交因素和POI特征的推荐模型。通过在2个公开数据集上进行的实验,验证了所提POIR-GAT模型可以有效融合用户社交信息和POI特征信息,提高POI推荐质量。
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