Title :
Incorporating trust relationships in collaborative filtering recommender system
Author :
Xiao Shen ; Haixia Long ; Cuihua Ma
Author_Institution :
Sch. of Inf. Sci. & Technol., Hainan Normal Univ., Haikou, China
Abstract :
Nowadays with the readily accessibility of online social networks (OSNs), people are facilitated to share interesting information with friends through OSNs. Undoubtedly these sharing activities make our life more fantastic. However, meanwhile one challenge we have to face is information overload that we do not have enough time to review all of the content broadcasted through OSNs. So we need to have a mechanism to help users recognize interesting items from a large pool of content. In this project, we aim at filtering unwanted content based on the strength of trust relationships between users. We have proposed two kinds of trust models-basic trust model and source-level trust model. The trust values are estimated based on historical user interactions and profile similarity. We estimate dynamic trusts and analyze the evolution of trust relationships over dates. We also incorporate the auxiliary causes of interactions to moderate the noisy effect of user´s intrinsic tendency to perform a certain type of interaction. In addition, since the trustworthiness of diverse information sources are rather distinct, we further estimate trust values at source-level. Our recommender systems utilize several types of Collaborative Filtering (CF) approaches, including conventional CF (namely user-based, item-based, singular value decomposition (SVD)based), and also trust-combined user-based CF. We evaluate our trust models and recommender systems on Friendfeed datasets. By comparing the evaluation results, we found that the recommendations based on estimated trust relationships were better than conventional CF recommendations.
Keywords :
collaborative filtering; recommender systems; security of data; singular value decomposition; social networking (online); user interfaces; Friendfeed datasets; OSN; basic trust model; collaborative filtering recommender system; historical user interactions; interesting item recognition; item-based type; online social networks; profile similarity; sharing activities; singular value decomposition-based type; source-level trust model; trust relationship evolution; trust value estimation; trust-combined user-based CF; user-based type; Analytical models; Collaboration; Computational modeling; Facebook; Recommender systems; Collaborative Filtering; Online Social Network; Recommender System; Trust Relationship; User Interaction;
Conference_Titel :
Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD), 2015 16th IEEE/ACIS International Conference on
Conference_Location :
Takamatsu
DOI :
10.1109/SNPD.2015.7176248