中文摘要：

针对现有位置社交网络兴趣点推荐的研究工作主要集中在挖掘兴趣点的情景信息：时间信息、地理位置和评论信息，其中评论信息对用户偏好的影响尚未充分研究的情况，提出一个统一兴趣点推荐模型。其融合了用户偏好模型和上述三种情景信息，对用户偏好建模采用基于签到次数的度量方法，同时对评论信息采用基于潜在狄利克雷分配主题模型来挖掘用户偏好。实验结果表明，该模型在推荐准确率等多种评价指标上都取得了更好的结果。

英文摘要：

Since the existing works of POI（point-of-interest） recommendation on location-based social networks（LBSN） focus on mining context information of POI, including the geographical information, comment information and the temporal information, which the comment information of user has not been systematically studied. This paper proposed a unified PII recommendation model, which fused user preference to a POI with temporal information, geographical influence and comment information of user. The model studied the comment information of LBSN by exploiting the latent Dirichlet allocation（LDA） model and modeled the user preference based on the number of user check-in behaviors. Finally, experimental results in real world social network show that the proposed model outperforms state-of-the-art recommendation algorithms in terms of precision and rating error.