Submitted on: 07 October 2012.
Revised on: 28 November 2012.
Accepted on: 17 January 2013.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
http://reply.papertrans.cn/1/85/8453/8453-22.png
Submitted on: 11 October 2018.
Revised on: 15 November 2018.
Accepted on: 31 December 2018.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
Submitted on: 21 July 1998.
Revised on: 07 October 1998.
Accepted on: 23 November 1998.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
http://reply.papertrans.cn/1/85/8453/8453-25.png
http://reply.papertrans.cn/1/85/8453/8453-26.png
Submitted on: 20 November 2019.
Revised on: 12 January 2020.
Accepted on: 21 February 2020.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
http://reply.papertrans.cn/1/85/8453/8453-28.png
Submitted on: 26 January 2014.
Revised on: 16 April 2014.
Accepted on: 21 May 2014.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
http://reply.papertrans.cn/1/85/8453/8453-30.png