1. College of Computer Science and Technology, Zhejiang University of Technology, Zhejiang 310023, China. He is now with the Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China, and also with the School of Computer Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
2. College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China.