4Khan L,Luo Feng.Ontology construction for information selection[C]// Proceedings of the 14th IEEE International Conference on Tools with Artificial Intelligence(ICTAI'02),2002: 122.
5Zhou L P,Zhang D F,Chen X,et al.A method for semantics- based conceptual expansion of ontology[C]//Proceedings of the 15th Annual Workshop on Selected Areas in Cryptography,2008.
6Quan T T,Hui S C,Cao T H.Automatic fuzzy ontology generation for semantic web[J].IEEE Transactions on Knowledge and Data Engineering, 2006, 18 (6) : 842-856.
7Chen Yi-fan,Xue Gui-rong,Yu Yong.Advertising keyword suggestion based on concept hierarchy[C]//Proceedings of ACM WSDM 2008, Stanford University, Stanford, California, USA, 2008.
8Kushilevitz E,Ostrovsky R,Rabani Y.Efficient search for approximate nearest neighbor in high dimensional spaces[J].SIAM Journal on Computing, 2000,30(2) : 451-474.