GHRS: Graph-based hybrid recommendation system with application to movie recommendation.

Research about recommender systems emerges over the last decade and comprises valuable services to increase different companies' revenue. While most existing recommender systems rely either on a content-based approach or a collaborative approach, there are hybrid approaches that can improve recommendation accuracy using a combination of both approaches. Even though many algorithms are proposed using such methods, it is still necessary for further improvement. This paper proposes a recommender system method using a graph-based model associated with the similarity of users' ratings in combination with users' demographic and location information. By utilizing the advantages of Autoencoder feature extraction, we extract new features based on all combined attributes. Using the new set of features for clustering users, our proposed approach (GHRS) outperformed many existing recommendation algorithms on recommendation accuracy. Also, the method achieved significant results in the cold-start problem. All experiments have been performed on the MovieLens dataset due to the existence of users' side information. • We propose a recommendation system using graph-based features and Autoencoders. • We investigate and analyze each step of the method to find the best setup. • We examine the method with the most popular evaluation metrics and datasets. • Results show an improvement in comparison with basic and state of the art methods. [ABSTRACT FROM AUTHOR]