JIANG Yan1, LI Yi2, YU Bo3, QUAN Yong2, JIANG Yu3, YU Kuo4, LI Wenhui2
1. College of Computer Science and Technology, Changchun Normal University, Changchun 130032, China; 2. College of Computer Science and Technology, Jilin University, Changchun 130012, China;3. Tsinghua Tongfang Co. Ltd., Beijing 100088, China;4. Sichuan Tobacco Monopoly Administration, Chengdu 610031, China