http://reply.papertrans.cn/3/299/29838/29838-21.png
Submitted on: 14 March 1998.
Revised on: 25 April 1998.
Accepted on: 21 May 1998.
TRANSPORTATION
http://reply.papertrans.cn/3/299/29838/29838-23.png
http://reply.papertrans.cn/3/299/29838/29838-24.png
Submitted on: 23 November 2007.
Revised on: 04 January 2008.
Accepted on: 26 January 2008.
TRANSPORTATION---SPRINGER
http://reply.papertrans.cn/3/299/29838/29838-26.png
Submitted on: 29 May 2007.
Revised on: 18 June 2007.
Accepted on: 07 July 2007.
TRANSPORTATION
http://reply.papertrans.cn/3/299/29838/29838-28.png
http://reply.papertrans.cn/3/299/29838/29838-29.png
http://reply.papertrans.cn/3/299/29838/29838-30.png