Funding for this research was provided by:
National Key Research and Development Program of China (2017YFA0505900)
National Natural Science Funds for Distinguished Young Scholar ((81825014)
Strategic Priority Research Program of the Chinese Academy of Sciences (XDB29020000)
National Natural Science Foundation of China (31830003, 81571954)
Key Program of Logistics Research (BWS17J030)
Article History
Received: 12 July 2019
Revised: 30 September 2019
Accepted: 21 October 2019
First Online: 13 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.