Funding for this research was provided by:
National Natural Science Foundation of China (41504131, 41674170, 41531071, 11373070)
Key Laboratory of Solar Activity at CAS NAO (KLSA201703)
Key Scientific Research Project in Universities of Henan Province (17A170002, 16A140016)
Article History
Received: 3 November 2017
Accepted: 5 February 2018
First Online: 13 February 2018