Funding for this research was provided by:
National Natural Science Foundation of China (61573096,)
Jiangsu Provincial Key Laboratory of Networked Collective Intelligence (BM2017002)
Rajiv Gandhi National Fellowship under the University Grant Commission, New Delhi (F1-17.1/2016-17/RGNF-2015-17-SC-TAM-21509)
Thailand research grant fund (RSA5980019)
Article History
Received: 28 July 2017
Accepted: 12 March 2018
First Online: 27 March 2018
Competing interests
: The authors declare that they have no competing interests.