Zhang, Zi-Ke; Zhou, Tao; Zhang, Yi-Cheng - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 1, pp. 179-186
Personalized recommender systems are confronting great challenges of accuracy, diversification and novelty, especially when the data set is sparse and lacks accessorial information, such as user profiles, item attributes and explicit ratings. Collaborative tags contain rich information about...