9Mylonas P H, Vallet D, Castells P. et al. Personalized information retrieval based on context and ontological knowledge [ J ]. The Knowledge Engineering Review, 2008, 23 ( 1 ) : 73 - 100.
10Williams M H, Roussaki I, Strimpakou M, et al. Context-awareness and personalisation in the Daidalos pervasive environment [ C ]// Proceedings of Intemational Conference in Pervasive Systems ( ICPS05 ). Piscataway, N. J. : IEEE Press, 2005:98 - 107.