[Lin, Wenbin; Liu, Yang] Univ South China, Sch Comp Sci, Hengyang 421001, Peoples R China.
[Lin, Wenbin; Xu, Zhenghua; Li, Jie; Gao, Linqing] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
[Zhang, Haotong] Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China.
[Wang, Yu] Sapienza Univ Roma, ICRA & Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy.
[Lin, Wenbin; Wang, Yu] ICRANet, Pzza Repubbl 10, I-65122 Pescara, Italy.