MV-RNN: A Multi-View Recurrent Neural Network for Sequential Recommendation

Sequential prediction is a fundamental task for Web applications. Due to the insufficiency of user feedbacks, sequential prediction usually suffers from the cold start problem. There are two kinds of popular approaches based on matrix factorization (MF) and Markov chains (MC) for item prediction. MF methods factorize the user-item matrix to learn general tastes of users. MC methods predict the next behavior based on recent behaviors. However, they have limitations. MF methods can merge additional information to address cold start but could not capture dynamic properties of user's interest, and MC based sequential methods have difficulty in addressing cold start and has a strong Markov assumption that the next state only depends on the last state. In this work, to deal with the cold start problem of sequential prediction, we propose a RNN model adopting visual and textual content of items, which is named as $\mathbf{V}$isual and $\mathbf{T}$extual $\mathbf{R}$ecurrent $\mathbf{N}$eural $\mathbf{N}$etwork ($\mathbf{VT}$-$\mathbf{RNN}$). We can simultaneously learn the sequential latent vectors that dynamically capture the user's interest, as well as content-based representations that contribute to address the cold start. Experiments on two real-world datasets show that our proposed VT-RNN model can effectively generate the personalized ranking list and significantly alleviate the cold start problem.