Submitted on: 14 December 2012.
Revised on: 11 January 2013.
Accepted on: 06 March 2013.
___________________eTransportation---ELSEVIER
Submitted on: 01 May 1998.
Revised on: 09 July 1998.
Accepted on: 17 August 1998.
___________________eTransportation---ELSEVIER
http://reply.papertrans.cn/1/90/8959/8959-13.png
http://reply.papertrans.cn/1/90/8959/8959-14.png
Submitted on: 29 December 1999.
Revised on: 11 March 2000.
Accepted on: 18 April 2000.
___________________eTransportation---ELSEVIER
Submitted on: 12 December 2007.
Revised on: 26 February 2008.
Accepted on: 27 March 2008.
___________________eTransportation---ELSEVIER
http://reply.papertrans.cn/1/90/8959/8959-17.png
http://reply.papertrans.cn/1/90/8959/8959-18.png
Submitted on: 02 June 2020.
Revised on: 12 August 2020.
Accepted on: 26 September 2020.
___________________eTransportation---ELSEVIER
Submitted on: 24 December 2011.
Revised on: 09 March 2012.
Accepted on: 09 April 2012.
___________________eTransportation---ELSEVIER