Affiliation: | 1. Institute of Computer Science and Technology, Peking University, Beijing 100871, PR China;2. Department of Electrical and Computer Engineering, National University of Singapore, 117583, Singapore;3. NLPR, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, PR China;4. Artificial Intelligence Institute, Qihoo 360 Technology Company, Ltd., Beijing 100015, PR China |