Funding for this research was provided by:
National Key R&D Program of China (2017YFB0502700)
National Natural Science Foundation of China (No. 61471195)
Fundamental Research Funds for the Central Universities (NZ2016105)
Fundamental Research Funds for the Central Universities (NJ20150017, NS2014040)
National Defense Pre-Research Foundation of China (6140413020116HK02001)
Article History
Received: 30 May 2018
Accepted: 29 August 2018
First Online: 10 September 2018
Authors’ Information
: Dan-Feng Qiu is an associate professor of the College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics. Xiao Ma is a Master’s student of the College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics. Jing-Dong Zhang is an associate professor of the College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics. Bin Zhao and Zi-Xia Lin are postdoctoral students of the Electronic Science and Engineering, Nanjing University.
: The authors declare that they have no competing interests.
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