The Recommender System (RS) has obtained a pivotal role in e-commerce.To improve the performance of RS, review text information has been extensively utilized.However, it is still a challenge for RS to extract the most informative feature from a tremendous amount of reviews.Another significant issue is the modeling of user⁻item interaction, which is rarely considered to capture high- and low-order interactions simultaneously.
In this paper, we design a Coffee Grinders multi-level attention mechanism to learn the usefulness of reviews and the significance of words by Deep Neural Networks (DNN).In addition, we develop a hybrid prediction structure that integrates Factorization Machine (FM) and DNN to model low-order Maytag Whirlpool Bowl Removal Tool user⁻item interactions as in FM and capture the high-order interactions as in DNN.Based on these two designs, we build a Multi-level Attentional and Hybrid-prediction-based Recommender (MAHR) model for recommendation.Extensive experiments on Amazon and Yelp datasets showed that our approach provides more accurate recommendations than the state-of-the-art recommendation approaches.
Furthermore, the verification experiments and explainability study, including the visualization of attention modules and the review-usefulness prediction test, also validated the reasonability of our multi-level attention mechanism and hybrid prediction.