TY - GEN
T1 - Improving a recommender system by collective matrix factorization with tag information
AU - Kim, Bu Sung
AU - Kim, Heera
AU - Lee, Jaedong
AU - Lee, Jee Hyong
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/2/18
Y1 - 2014/2/18
N2 - Collaborative filtering (CF) is the most widely used method of recommender systems. However, it is hard to give users reliable recommendation when there is little information about users. This is the sparsity problem of CF. In this paper, we propose a collective matrix factorization method using tag information to solve the sparsity problem. With tag information, we construct a user-tag matrix that represents users' preferences about tags. Using the user-tag matrix, we convert sparse user-item matrix into dense user-item matrix. In our method, the collective matrix factorization has the role of transferring information between the user-item matrix and user-tag matrix. We experimentally show that our method generates more precise prediction than general CF suffering from the sparsity problem.
AB - Collaborative filtering (CF) is the most widely used method of recommender systems. However, it is hard to give users reliable recommendation when there is little information about users. This is the sparsity problem of CF. In this paper, we propose a collective matrix factorization method using tag information to solve the sparsity problem. With tag information, we construct a user-tag matrix that represents users' preferences about tags. Using the user-tag matrix, we convert sparse user-item matrix into dense user-item matrix. In our method, the collective matrix factorization has the role of transferring information between the user-item matrix and user-tag matrix. We experimentally show that our method generates more precise prediction than general CF suffering from the sparsity problem.
KW - collaborative filtering
KW - collective matrix factorization
KW - recommender system
KW - sparsity problem
KW - tag information
UR - https://www.scopus.com/pages/publications/84946531408
U2 - 10.1109/SCIS-ISIS.2014.7044855
DO - 10.1109/SCIS-ISIS.2014.7044855
M3 - Conference contribution
AN - SCOPUS:84946531408
T3 - 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems, SCIS 2014 and 15th International Symposium on Advanced Intelligent Systems, ISIS 2014
SP - 980
EP - 984
BT - 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems, SCIS 2014 and 15th International Symposium on Advanced Intelligent Systems, ISIS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems, SCIS 2014 and 15th International Symposium on Advanced Intelligent Systems, ISIS 2014
Y2 - 3 December 2014 through 6 December 2014
ER -