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COT: Contextual Operating Tensor for Context-aware Recommender Systems
Liu, Qiang; Wu, Shu; Wang, Liang
Conference NameAAAI Conference on Artificial Intelligence (AAAI)
Source PublicationIn Proceedings of the Twenty-Ninth AAAI Conference on Artificial Intelligence (AAAI), 2015
Conference DateJanuary 25-30
Conference PlaceAustin
AbstractWith rapid growth of information on the internet, recommender systems become fundamental for helping users alleviate the problem of information overload. Since contextual information can be used as a signifi- cant factor in modeling user behavior, various contextaware recommendation methods are proposed. However, the state-of-the-art context modeling methods treat contexts as other dimensions similar to the dimensions of users and items, and cannot capture the special semantic operation of contexts. On the other hand, some works on multi-domain relation prediction can be used for the context-aware recommendation, but they have problems in generating recommendation under a large amount of contextual information. In this work, we propose Contextual Operating Tensor (COT) model, which represents the common semantic effects of contexts as a contextual operating tensor and represents a context as a latent vector. Then, to model the semantic operation of a context combination, we generate contextual operating matrix from the contextual operating tensor and latent vectors of contexts. Thus latent vectors of users and items can be operated by the contextual operating matrices. Experimental results show that the proposed COT model yields significant improvements over the competitive compared methods on three typical datasets, i.e., Food, Adom and Movielens-1M datasets
KeywordRecommender Systems Context-aware Contextual Operating
Document Type会议论文
Corresponding AuthorWu, Shu
AffiliationInstitute of Automation, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Qiang,Wu, Shu,Wang, Liang. COT: Contextual Operating Tensor for Context-aware Recommender Systems[C],2015.
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