School;
of;
Economics;
and;
Management,;
Beijing;
University;
of;
Chemical;
Technology,;
Beijing;
100029,;
China;
School;
of;
Economics;
and;
Management,;
Beijing;
University;
of;
Aeronautics;
and;
Astronautics,Beljing;
100083,;
China;
College;
of;
Information;
Science;
and;
Technology,;
Beijing;
Normal;
University,;
Beijing;
100875,China;