结合兴趣点类别周期属性和用户短期偏好特征的推荐模型
桑春艳, 易星宇, 廖世根, 文俊浩

A recommendation model combining point of interest category periodic attributes and user short⁃term preference features
Chunyan Sang, Xingyu Yi, Shigen Liao, Junhao Wen
图4 签到次数对应的时间长度的折线图(a)和箱线图(b)
Fig.4 Line (a) and box (b) charts of check?in times