Xiaofeng Liao Yongji Wang 0002 Liping Ding Jian Gu Extended Probabilistic Latent Semantic Analysis Model For Topics In Time-Stamped Images. 997-1007 2011 17 Intell. Autom. Soft Comput. 7 https://doi.org/10.1080/10798587.2011.10643204 db/journals/iasc/iasc17.html#LiaoWDG11