Funding for this research was provided by:
National Natural Science Foundation of China (31201491)
Doctoral Fund of Ministry of Education of China (20123515120005)
Natural Science Foundation of Fujian Province of China (2014J06011)
Education department of Fujian Province Office Program (Education department of Fujian Province Office Program)
FAFU Science Fund for Distinguished Young Scholars (xjq201402)
Article History
Received: 20 September 2015
Accepted: 28 February 2016
First Online: 11 April 2016