Semi-nonnegative matrix factorization with global statistical consistency for collaborative filtering

Collaborative Filtering, considered by many researchers as the most important technique for information filtering, has been extensively studied by both academic and industrial communities. One of the most popular approaches to collaborative filtering recommendation algorithms is based on low-dimensional factor models. The assumption behind such models is that a user’s preferences can be modeled by linearly combining item factor vectors using user-specific coefficients. In this paper, aiming at several aspects ignored by previous work, we propose a semi-nonnegative matrix factorization method with global statistical consistency. The major contribution of our work is twofold: (1) We endow a new understanding on the generation or latent compositions of the user-item rating matrix. Under the new interpretation, our work can be formulated as the semi-nonnegative matrix factorization problem. (2) Moreover, we propose a novel method of imposing the consistency between the statistics gi...

• Type: Conference
• Year: 2009
• Where: CIKM
• Authors: Hao Ma, Haixuan Yang, Irwin King, Michael R. Lyu
• Keywords: CIKM 2009, Database, Low-dimensional Factor Models, Matrix Factorization Method, Semi-nonnegative Matrix Factorization