Funding for this research was provided by:
National Natural Science Foundation of China (11405262)
National Natural Science Foundation of China (11375259)
National Center for Mathematics and Interdisciplinary Sciences, Chinese Academy of Sciences (Y029152k51)
Key Laboratory of Random Complex Structures and Data Sciences, Chinese Academy of Sciences (2008DP173182)
Article History
Received: 29 September 2017
Accepted: 17 January 2018
First Online: 20 February 2018