User-based collaborative filtering on cross domain by tag transfer learning
Weiqing Wang, Zhenyu Chen, Jia Liu, Qi Qi, Zhihong Zhao · 2012
Exploiting social tag information has been a popular way to improve recommender systems in recent years. However, recommender systems could not be improved with tags when tags are sparse. We notice that, while the tags are sparse for recommendation on some target domains, related and relatively dense auxiliary tags may already exist in some other more mature application domains. This inspires us to transfer tags to improve recommender systems on cross domain.