1. College of Physics and Electronics, Hunan University of Arts and Science, Changde, People's Republic of China
2. College of Physical Science and Technology, Guangxi Normal University, Guilin, People's Republic of China
3. School of Computer Science and Communication Engineering, Guangxi University of Science and Technology, Liuzhou, People's Republic of China
4. Library, Guangxi Normal University, Guilin, People's Republic of China