DONG Jian-zhi1,ZHANG Ke-li1,WANG Ying1,YUAN Shuang1,ZHANG Wei-xiang2(1.State Key Laboratory of Earth Surface Processes and Resource Ecology,School of Geography and Remote SensingScience,Beijing Normal University,Beijing 100875,2.Reaserch Institute of Highway Ministry Transport,Beijing 100088)
S157.1