摘要
Received 27 September 2012 Received in revised form 5 December 2012 Accepted 14 December 2012 Available online 4 February 2013
Received 27 September 2012 Received in revised form 5 December 2012 Accepted 14 December 2012 Available online 4 February 2013
基金
the National Science Council(No.NSC 101-2113-M-035-001-MY2) for the financial support