Corresponding author. Tel.: +86-451-86402432. E-mail address: hlgzdm58@hit.edu.cn ZHANG De-ruing Born in 1977, candidate for Ph.D. of materials science in Harbin Institute of Technology. He received B.S. and M.S. from Harbin Institute of Science and Technology in 2000 and 2003 respectively. He has oublished several scientific papers in various penodicals.