Improving recommendation performance through ontology-based semantic similarity

Authors:
Mingxin Gan;Xue Dou;Rui Jiang
Affiliations:
School of Economics and Management, University of Science and Technology Beijing, Beijing, China;School of Economics and Management, University of Science and Technology Beijing, Beijing, China;Bioinformatics Division, TNLIST/Department of Automation, Tsinghua University, Beijing, China
Venue:
ICICA'12 Proceedings of the Third international conference on Information Computing and Applications
Year:
2012

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Abstract

Making personalized recommendation according to preferences of users is of great importance in recommender systems. Currently most book recommender systems take advantage of relational databases for the representation of knowledge and depend on historical data for the calculation of relationships between books. This scheme, though having been widely used in existing methods based on the collaborative filtering strategy, overlooks intrinsic semantic relationships between books. To overcome this limitation, we propose a novel approach called COSEY (COllaborative filtering based on item SEmantic similaritY) to achieve personalized recommendation of books. We derive semantic similarities between books based on semantic similarities between concepts in an ontology that describes categories of books using our previously proposed method DOPCA, and we incorporate such similarities between books into the item-based collaborative filtering strategy to achieve personalized recommendation. We validate the proposed COSEY approach through comprehensive experiments and show the superior performance of this approach over existing methods in the recommendation of books.