1. Henan University of Science and Technology, Luolong, Luoyang, Henan, China
2. Chengdu University of Information Technology, Chengdu, Sichuan, China
3. Synopsys, Inc., Sunnyvale, CA, US
4. The University of Kitakyushu, Wakamatsu, Kitakyushu, Fukuoka, Japan