1. College of Computer Science and Technology, Jilin University & Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, Jilin University, Changchun, Jilin, China
2. Australian Artificial Intelligence Institute, FEIT, University of Technology Sydney, Sydney, Australia
3. Computer Science and UMIACS, University of Maryland, Maryland, USA
4. College of Computer Science and Technology, Jilin University & City University of Hong Kong, Changchun, Jilin, China