摘要
Received 2 December 2012 Received in revised form 26 December 2012 Accepted 31 December 2012 Available online 4 February 2013
Received 2 December 2012 Received in revised form 26 December 2012 Accepted 31 December 2012 Available online 4 February 2013
基金
supported by the Grants from the National 973 Basic Research Program(No.2012CB933800)
the National Natural Science Foundation of China(No.21035002)
the National Science Fund for Creative Research Groups(No.21121091)
the Natural Science Foundation of Jiangsu Province(No.BK2010009)