作者机构:[1]Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China, [2]School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, China
相关基金:This work was supported by the National Natural Science Foundations of China (10772085, 11272155 and 11132007), 333 Project of Jiangsu Province, China (BRA2011172), and NUST Research Funding, China (2011 YBXM32).