Ren, Pengjie
Chen, Zhumin
Ma, Jun
Wang, Shuaiqiang
Zhang, Zhiwei
Ren, Zhaochun
Funding for this research was provided by:
the Natural Science Foundation of China (61272240)
the Natural Science Foundation of China (61103151)
the Doctoral Fund of Ministry of Education of China (20110131110028)
the Natural Science foundation of Shandong province (ZR2012FM037)
the Excellent Middle-Aged and Youth Scientists of Shandong Province (BS2012DX017)
the Natural Science Foundation of China (71402083)
the Academy of Finland (268078)
Article History
Received: 19 May 2015
Accepted: 28 September 2015
First Online: 9 October 2015
Free to read: This content has been made available to all.