1. Faculty of Engineering and IT, University of Technology Sydney, 1994 Sydney, Australia, 2007 (e-mail: lu.zhang-5@student.uts.edu.au)
2. School of EEECS, Queen's University Belfast (QUB), Belfast, United Kingdom of Great Britain and Northern Ireland, BT9 5BN (e-mail: jialie@gmail.com)
3. Faculty of Engineering and IT, University of Technology, Sydney, Ultimo, NSW, Austria, 2007 (e-mail: Jian.Zhang@uts.edu.au)
4. Global Big Data Technologies Center, University of Technology Sydney, 1994 Sydney, New South Wales, Australia, 2007 (e-mail: jingsong.xu@uts.edu.au)
5. FEIT, University of Technology Sydney, 1994 Sydney, New South Wales, Australia, 2007 (e-mail: Zhibin.Li@student.uts.edu.au)
6. School of Computer Science and Engineering, Nanjing University of Science and Technology, 12436 Nanjing, China, 210094 (e-mail: yazhou.yao@njust.edu.cn)
7. School of Electrical and Data Engineering, University of Technology Sydney, 1994 Sydney, New South Wales, Australia, 2007 (e-mail: litao.yu@uts.edu.au)