Zhang, Zhengqiu
Cao, Jinde
Funding for this research was provided by:
the Innovation Platform Open Fund of Hunan Province of China (201485)
the Jiangsu Provincial Key Laboratory of Networked Collective Intelligence (BM2017002)
Article History
Received: 10 April 2018
Accepted: 17 July 2018
First Online: 31 July 2018
Competing interests
: The authors declare that they have no competing interests.