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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 2587069, 10 pages
https://doi.org/10.1155/2017/2587069
Research Article

Personalized Recommendation via Suppressing Excessive Diffusion

State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Correspondence should be addressed to Hui Tian; nc.ude.tpub@iuhnait

Received 15 November 2016; Revised 1 March 2017; Accepted 23 May 2017; Published 18 June 2017

Academic Editor: Yann Favennec

Copyright © 2017 Guilin Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Efficient recommendation algorithms are fundamental to solve the problem of information overload in modern society. In physical dynamics, mass diffusion is a powerful tool to alleviate the long-standing problems of recommendation systems. However, popularity bias and redundant similarity have not been adequately studied in the literature, which are essentially caused by excessive diffusion and will lead to similarity estimation deviation and recommendation performance degradation. In this paper, we penalize the popular objects by appropriately dividing the popularity of objects and then leverage the second-order similarity to suppress excessive diffusion. Evaluation on three real benchmark datasets (MovieLens, Amazon, and RYM) by 10-fold cross-validation demonstrates that our method outperforms the mainstream baselines in accuracy, diversity, and novelty.