1. Department of Computer Science and Technology, Jilin University, Changchun, China
2. College of Information Technology and Media, Beihua University, Jilin, China
3. State Key Laboratory of Applied Optics, Changchun, China
4. Department of Symbolic Computing and Knowledge Engineering, Key Laboratory of the Ministry of Education, Jilin University, Changchun, China
5. Changchun University of Science and Technology, Changchun, China