Effects of User Tastes on Personalized Recommendation

Abstract

Based on a weighted projection of the user-object bipartite network,the effects of user tastes on the mass-diffusion-based personalized recommendation algorithm are studied,where a user tastes or interests are defined by the average degree of the objects he has collected.It is assumed that the initial recommendation power located on the objects should be determined by both of their degree and the users tastes.By introducing a tunable parameter,the user taste effects on the configuration of initial recommendation power distribution are investigated.The numerical results show that the presented algorithm could improve the accuracy,measured by the average ranking score,more importantly.When the data is sparse,the algorithm should give more recommendation power to the objects whose degrees are close to the users tastes,while when the data becomes dense,it should assign more power on the objects whose degrees are significantly different from user's tastes.