School of Computer Science and Engineering,Huaihua University,Huaihua,418000,China;
Key Laboratory of Wuling-Mountain Health Big Data Intelligent Processing and Application in Hunan Province Universities,Huaihua,418000,China;
Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province,Huaihua,418000,China;
School of Computer,Wuhan University,Wuhan,430072,China;
Department of Electrical and Computer Engineering,Duke University,Durham,NC 27708,USA;
School of Computer Science and Engineering,Yulin Normal University,Yulin,537000,China;
Highly sparse dataset; normalized models; teaching recommendation factorization machines; excellent teacher recommendation;