1. Institute for Sustainable Industries and Liveable Cities, Victoria University, Melbourne, Australia
2. Department of Computer Science, Purdue University, West Lafayette, USA
3. School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
4. Department of Computer Science and Information Technology, La Trobe University, Melbourne, Australia
5. Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province, Zhejiang Normal University, Jinhua, China