6Palace of Fine Arts. Exploratorium[DB/OL].http://www.exploratorium.edu/guidebook.
74th World Conference on mLearning[DB/OL].http://www.mlearn.org.za/CD.
8MIT. Hand held Augmented Reality Simulations [DB/OL]. http://education.mit.edu/drupal/ar.
9Trifonova,A. Accessing learning content in a mobile system." Does mobile mean always connected[A]. M.Lytras&A.Naeve. Ubiquitous and pervasive knowledge and learning man-agement:semantics,social networking and new media to their full potential[C]. Hershey, PA: Idea Group, lnc., 2007:198-215.
10Liu Qin, Wang Guo-jun, Wu Jie. Time-Based Proxy Re-encryption Scheme for Secure Data Sharing in a Cloud Environment[J]. Information Sciences, 2014, 258(10): 355-370.
