基金supported by National Science Foundation of China(Nos.60974040,60834001,61120106009)the Research Award Foundation for the Excellent Youth Scientists of Shandong Province of China(No.BS2011DX010)the Fundamental Research Funds for the Central Universities(No.2011JBM201)
基金supported by National Natural Science Foundation of China(Nos.61374102,61120106009,60974040)the Singapore NationalResearch Foundation(NRF)through the Singapore-MIT Alliance for Research and Technology(SMART)Center for Future Urban Mobility(FM)
