College of Computer Science,Inner Mongolia University,Hohhot 010021;
Department of Civil Engineering,The University of Hong Kong,Pokfulam Road,Hong Kong;
Department of Mathematics,University of Science and Technology of China,Hefei 230026;
School of Economics and Management,Beijing University of Aeronautics and Astronautics,Beijing 100191;
Department of Civil and Structural Engineering,The Hong Kong Polytechnic University,Hong Kong;
Department of Transportation Engineering,Ajou University,San 5 Woncheon-Dong,Yeongtong-Ku,Suwon,442-749 Korea;
