Qing Li
Department of Computer Engineering and Information Technology
City University of Hong Kong
Tat Chee Avenue, Kowloon, Hong Kong
<itqli@cityu.edu.hk>
H. Lilian Tang
Department of Computing
University of Surrey, UK
<h.tang@surrey.ac.uk>
Horace H. S. Ip
Centre for Innovative Application of Internet and Multimedia Technologies (AIMtech)
City University of Hong Kong
Tat Chee Avenue, Kowloon, Hong Kong
<cship@cityu.edu.hk>
Shermann S. M. Chan
Department of Computer Science
City University of Hong Kong
Tat Chee Avenue, Kowloon, Hong Kong
<shermann@cs.cityu.edu.hk>
[1]This research has been supported, in part, by a Strategic Research Grant from CityU (Project no. 7001073) and RGC grant No: CityU1150/01E.