Collaborative Filtering Recommendation Algorithm Based on User Interests
Zuping Liu · International Journal of u- and e- Service Science and Technology · 2015
To overcome the problem of too much sparse by scoring matrix, the paper proposes from the part of user interests the collaborative filtering recommendation algorithm based on such interest.In the e-commerce websites, recommendation items have various appearance, function and category attributes.Items which hold similar characteristics generally gain approximate scoring values.The aforesaid method extracts useful information for improvement from user interests.Users' scorings about different items imply their modes of interest.Interest association exists amongst items that were evaluated by the same user.Since individual interest shifts, the intensity of such correlation will gradually change along with days.By building interest intensity model with time decay, and discovering interest correlation among different items through that model, the proposed algorithm can predict scoring matrix and fill it, which is helpful to alleviate problems with sparse caused by user-item scoring matrix.