Method of drifting user's interests based on hybrid model

This paper aims at the problem of combination of user's interests and previous interests. It proposes a hybrid model based on concept correlations. In this hybrid model, user's interests consist of long-term model and short-term model, and these two models adopt different algorithms to deal with the interest's changes. Short-term model uses sliding window algorithm to deal with the sequence of the user's interest samples. Long-term model uses gradual forgetting algorithm based on concepts correlations to calculate the interests' weight. Experiment shows that this method is more efficient; it can not only trace the interest change of the user exactly, but also predict the interest of the users.