1. Ph.D. student, Faculty of Engineering, China Univ. of Geosciences, Wuhan, 430074, China; presently, Visiting Scholar, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Kansas, 1530 W. 15th Street, Lawrence, KS.
2. Curators’ Professor, Dept. of Physics, Univ. of Missouri, Kansas City, MO 64110.
3. Professor, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Kansas, 1530 W. 15th Street, Lawrence, KS 66045 (corresponding author).