College of Civil Aviation;
Nanjing University of Aeronautics and Astronauti cs;
Nanjing 210016;
P.R.China;
Xiamen Airlines;
Xiamen 361000;
P.R.China;
School of Economics and Management;
Nanjing University of Posts and Telecommunications;
Nanjing 210023;
P.R.China;
airline; alliance; airline; cooperation; partner; optimization; model;