Yi, Sheng
She, Xiaoyu
Guo, Dong
Zhao, Tong
Yang, Chengwei
Li, Jie
Article History
First Online: 31 March 2020
Compliance with ethical standards
:
: The research received no external funding. Among the authors, Sheng Yi and Xiaoyu She are graduate students of Beijing Institute of Technology. The research was performed as part of their education. Jie Li and Chengwei Yang are employed by Beijing Institute of Technology. Dong Guo is employed by Beihang University. Tong Zhao is employed by University of Chinese Academy of Sciences. They only played a supervising role in the research.