^pSchool,;
Hunan;
University,Changsha;
410082,;
China;
^pResearch;
Center;
for;
Transportation;
and;
Logistics,;
Hunan;
University,;
Changsha;
410082,;
Chin~;
^pof;
Shipping;
Economics;
and;
Logistics,;
Bremen;
28359,;
Germany);