Abstract
The collaborative filtering (CF) based models have the powerful ability to use the interaction of users and items for recommendation. However, many existing CF-based approaches can only grasp the single relationship between users or items, such as item-based CF, which utilizes the single relationship of similarity identified from user-item matrix to compute recommendations. To overcome these shortcomings, we propose a novel approach named KPG4Rec which integrates multiple property relationships of items for personalized recommendation. In the initial step, we extract properties and corresponding triples of items from an existing knowledge graph, and utilize them to construct property-aware graphs based on user-item interaction graphs. Then, continuous low-dimensional vectors are learned through node2vec technology in these graphs. In the prediction phase, the recommendation score of one candidate item is computed by comparing it with each item in the user history preference sequence, where the pretrained embedding vectors of items are used to take all the properties into consideration. On the other hand, Locality Sensitive Hashing (LSH) mechanism is adopted to generate brand new preference sequences of users to improve the efficiency of KPG4Rec. Through extensive experiments on two real-world datasets, our approach is proved to outperform several widely adopted methods in the Top-N recommendation scenario.
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Acknowledgement
This work is supported in part by the Fundamental Research Fund for the Central Universities (30920041112, 30919011282), the National Key R&D Program of China (Funding No. 2020YFB1805503), Jiangsu Province Modern Education Technology Research Project (84365); National Vocational Education Teacher Enterprise Practice Base “Integration of Industry and Education” Special Project (Study on Evaluation Standard of Artificial Intelligence Vocational Skilled Level). the Postdoctoral Science Foundation of China (2019M651835), National Natural Science Foundation of China (61702264).
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Ge, H., Li, Q., Meng, S., Hou, J. (2022). KPG4Rec: Knowledge Property-Aware Graph for Recommender Systems. In: Khosravi, M.R., He, Q., Dai, H. (eds) Cloud Computing. CloudComp 2021. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 430. Springer, Cham. https://doi.org/10.1007/978-3-030-99191-3_9
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