Comparing Preference Models in Recommender Systems
Juntao Liu, Dewei Deng, Hanbao Wu, Caihua Wu · 2015
How to represent the users' preference is one of the principle problems in widely used recommender systems. To address this problem, in this paper, the expressibility, space complexity and learning complexity of different kinds of preference models are investigated. The recommendation performances of these models are also compared on a real-life dataset. Considering both the expressibility and computational complexity, the quadric model is the most suited to recommender systems.