2Resnick P, et al.Grouplens: An open architecture for collaborative filtering of NetNews[A].Proceedings of CSCW 94[C], Chaple Hill, NC, 1994:175-186.
3Yao Jung Yang, Chuni Wu. An attribute-based ant colony systemfor adaptive learning object recommendation[J]. Expert Systems with Applications, 2009,(36): 3034-3047.
5Weiser, M.The Computer for the Twenty-First Century [J]. Scientific American, 1991,(3):94-100.
6Li., L.Y., Zheng, Y.L., Ogata, H., & Yano, Y. Research On Pervasive E Learning System Development[C], Proc.of E-Learn2003:595-598.
7Chen, Y.S., Kao, T.C., Shen, J.P., & Chiang, C.Y..A Mobile Scaffolding-Aid-Based Bird -Watching Learning System[C], Proc. of IEEE International Workshop on Wireless and Mobile Technologies in Education, 2002:15-22.
8Li., L.Y,, Zheng, Y.L., Ogata, H,, & Yano, Y. A Conceptual Framework of Computer-supported Ubiquitous Learning Environment[C], Proc.of The IASTED International Conference Web-based Education:243-248.
9Li., L.Y., Zheng, Y.L., Ogata, H., & Yano, Y. Ubiquitous Computing in Learning: Toward a Conceptual Framework of Ubiquitous Learning Environment[J]. Journal of Pervasive Computing and Communications,2005,(3):207-215.
10Boyinbode O K,Akintola K G.A sensor based framework for ubiquitous learning in Nigeria [J].Intemational Journal of Computer Science and Network Security, 2008,8 ( 11 ) : 401-405.