作者机构:[1]Department of Mechanical Engineering, Key Laboratory for Advanced Manufactnring by Materials Processing Technology, Ministry of Education of P. R. China, Tsinghua University, Beijing, 100084
相关基金:Acknowledgement This research is supported by the National Natural Science Foundation of China (grant No. 50575114 and No. 50635050) and by Beijing Natural Science Foundation (grant No. 3052010) and by China Postdoctoral Science Foundation ( grant No. 20080430360).
Guo Wei, The School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191. Guo Wei Correspnnding author, E-mail : gwei@tsinghua.edu.cn