作者机构:Key Laboratory of Mechanics on Western Disaster and Environment, the Ministry of Education of China, Lanzhou University, Lanzhou 730000, China
相关基金:Project supported by the Ministry of Science and Technology of China (No. 2009CB421304), National Natural Science Foundation of China (Nos. 10872082 and 11002064), Ministry of Education, Science and Technology Research Project (No. 308022).