Funding for this research was provided by:
National Natural Science Foundation of China (71704178)
Beijing Municipal Excellent Talents Foundation (2017000020124G133)
Yue Qi Distinguished Scholar Project (2017)
National Statistical Science Research Project (2017LY10)
Major Consulting Project of Chinese Academy of Engineering (2016-ZD-07, 2017-ZD-03)
Article History
Received: 29 July 2018
Accepted: 27 October 2018
First Online: 1 November 2018