EFFECTS OF USER'S TASTES ON PERSONALIZED RECOMMENDATION

摘要

In this paper, based on a weighted projection of the user-object bipartite network, we study the eects of user tastes on the mass-diusion-based personalized recommendation algorithm, where a user's tastes or interests are dened by the average degree of the objects he has collected. We argue that the initial recommendation power located on the objects should be determined by both of their degree and the user's tastes. By introducing a tunable parameter, the user taste eects on the conguration of initial recommendation power distribution are investigated. The numerical results indicate that the presented algorithm could improve the accuracy, measured by the average ranking score. More importantly, we nd that when the data is sparse, the algorithm should give more recommendation power to the objects whose degrees are close to the user's tastes, while when the data becomes dense, it should assign more power on the objects whose degrees are signicantly dierent from user's tastes.