Dan, Han-Cheng
He, Lin-Hua
Xu, Bo
Funding for this research was provided by:
the National Natural Science Foundation of China (51248006, 51308554)
the Special Financial Grant from the China Postdoctoral Science Foundation (2013T60865)
the Guizhou Transportation Science and Technology Foundation (2013-121-013)
the Guizhou Science and Technology Department Foundation (20132167)