1. School of Materials Science and Engineering Beihang University Beijing 100191 P. R. China
2. Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR) 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
3. IT4Innovations VSB-Technical University of Ostrava 17. Listopadu 2172/15 708 00 Ostrava Czech Republic