Authors
Junfeng Qiao
School of Mathematics and Statistics, Xidian University, Xi’an, China
School of Mathematics and Physics, Nanyang Institute of Technology, Nanyang, China
Sanyang Liu
School of Mathematics and Statistics, Xidian University, Xi’an, China
Xiaogang Qi
School of Mathematics and Statistics, Xidian University, Xi’an, China
Gengzhong Zheng
School of Computer and Information Engineering, Hanshan Normal University, Chaozhou, China