1. School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, People’s Republic of China
2. School of Science, Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
3. Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang 550001, China
4. Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, CA 92093, USA
5. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
6. University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
7. NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa
8. CSIRO Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
9. School of Physics, Peking University, Beijing 100871, People’s Republic of China
10. Xinjiang Astronomical Observatory, 150, Science-1 Street, Urumqi, 830011 Xinjiang, People’s Republic of China