An impact of time and item influencer in collaborative filtering recommendations using graph-based model |
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| Institution: | 1. Advanced Analytics Engineering Centre, Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA, Malaysia;2. Faculty of Information Technology and Sciences, Inti International University, Malaysia;1. Faculty of Information Technology, Hung Yen University of Technology and Education, Hung Yen, Vietnam;2. School of Information Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan;3. Hanoi University of Science and Technology, Hanoi, Vietnam;4. AI Academy Vietnam, 489 Hoang Quoc Viet Rd, Hanoi, Vietnam;1. Department of Computer Science, University of Vigo, ESEI, Campus As Lagoas, 32004 Ourense, Spain;2. The Biomedical Research Centre (CINBIO), Campus Universitario Lagoas-Marcosende, 36310 Vigo, Spain;3. SING Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain;4. Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal;1. Computer Science & Engineering Department, Thapar Institute of Engineering & Technology, Patiala, India;2. Department of Computational Sciences, Maharaja Ranjit Singh Punjab Technical University, Bathinda, India;3. Electrical & Instrumentation Engineering Department, Thapar Institute of Engineering & Technology, Patiala, India;1. Tampere University, FIN-33014, Finland;2. Bauhaus-Universität Weimar, Weimar 99423, Germany;3. Leipzig University, Leipzig 04109, Germany;4. Martin-Luther-Universität Halle-Wittenberg, Halle 06108, Germany;1. Indian Statistical Institute, Kolkata, India;2. IBM Research, Dublin, Ireland;3. Dublin City University, Dublin, Ireland |
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| Abstract: | Recommender Systems deal with the issue of overloading information by retrieving the most relevant sources in the wide range of web services. They help users by predicting their interests in many domains like e-government, social networks, e-commerce and entertainment. Collaborative Filtering (CF) is the most promising technique used in recommender systems to give suggestions based on liked-mind users’ preferences. Despite the widespread use of CF in providing personalized recommendation, this technique has problems including cold start, data sparsity and gray sheep. Eventually, these problems lead to the deterioration of the efficiency of CF. Most existing recommendation methods have been proposed to overcome the problems of CF. However, they fail to suggest the top-n recommendations based on the sequencing of the users’ priorities. In this research, to overcome the shortcomings of CF and current recommendation methods in ranking preference dataset, we have used a new graph-based structure to model the users’ priorities and capture the association between users and items. Users’ profiles are created based on their past and current interest. This is done because their interest can change with time. Our proposed algorithm keeps the preferred items of active user at the beginning of the recommendation list. This means these items come under top-n recommendations, which results in satisfaction among users. The experimental results demonstrate that our algorithm archives the significant improvement in comparison with CF and other proposed recommendation methods in terms of recall, precision, f-measure and MAP metrics using two benchmark datasets including MovieLens and Superstore. |
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