【作者】Tao Zhang，Gang Ren，Gang Cheng，Yang Yang，Minjie Jin
【作者单位】1 School of Traffic and Logistics Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024 Shanxi , China 2 School of Transportation, Southeast University, Nanjing, Jiangsu, China 3 Center of Tibetan Studies (Everest Research Institute), Tibet University, Lhasa, Xizang, China 4 School of Traffic and Logistics Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi , China
