Xiao Fu Born in 1981, he received B.S. degree from Beijing University of Aeronautics and Astronautics in 2003 and then became a Ph.D. candidate there. His main research interest lies in smart materials. E-mail: xf@mse.buaa.edu.cn Corresponding author. Tel.: +86-10-82338559. E-mail address: xinqing@buaa.edu.cn