Kong, Fanqiang
Wen, Keyao
Li, Yunsong
Funding for this research was provided by:
the National Natural Science Foundation of China (61801214, 61801359)
Article History
First Online: 1 July 2019
Compliance with Ethical Standards
: This article does not contain any studies with human participants or animals performed by any of the authors. Ethics Committee approval was obtained from the Institutional Ethics Committee of Nanjing University of Aeronautics and Astronautics to the commencement of the study.
: The authors declare that they have no conflict of interest.