An Improved Collaborative Filtering Algorithm Based on Multi-Context Awareness
Yuan Bai, Yu K. Fang · 2015
In the research field of recommender systems, people tend to focus on mining relationship between users and items, but less take the additional contextual information into consideration.To solve the problem, we put forward an improved collaborative filtering algorithm based on multiple contexts (MCCF).The algorithm utilizes AHP to calculate the weight vector of context features, then transform contextual information into SimHash sequence based on the weight vector to calculate context similarity.Use the composite similarity which compounds the user preference and the context to structure the target user's nearest neighbor set.Finally, integrate the composite similarity into the traditional collaborative filtering algorithm to predict preferences and recommend items.Experiments show that MCCF is superior to the traditional ones and single context ones in both performance and recommendation accuracy.