Qiu Zhiping Born in 1962, he is a professor of Beijing University of Aeronautics and Astronautics. He received his B.S. and M.S. degrees from Mathematics Department of Jilin University in 1984 and 1990 respectively. He received his Ph.D. degree from Engineering Mechanics Department of Jilin University in 1994. His main research interests include computational solid mechanics, uncertain problems in mechanics, structural optimization and reliability. E-maih zpqiu@buaa.edu.cn Corresponding author. Tel.: +86-10-82323871. E-mail address. zpqiu@buaa.edu.cn Zhang Yuxing Born in 1975, she received her B.S. and M.S. degrees from Inner Mongolia University of Technology in 1997 and 2002 respectively, and then became a teacher of China University of Geosciences. Her main research interests are computational solid mechanics, metaheuristics, multi- objective optimization. E-mail: yxzhang@cugb.edu.cn