http://reply.papertrans.cn/2/175/17401/17401-11.png
Submitted on: 16 May 2009.
Revised on: 07 August 2009.
Accepted on: 06 September 2009.
___________________Journal of Infrastructure Systems
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Submitted on: 26 October 2000.
Revised on: 03 February 2001.
Accepted on: 10 March 2001.
___________________Journal of Infrastructure Systems
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http://reply.papertrans.cn/2/175/17401/17401-16.png
Submitted on: 12 July 2020.
Revised on: 16 August 2020.
Accepted on: 01 October 2020.
___________________Journal of Infrastructure Systems
Submitted on: 19 February 1999.
Revised on: 20 March 1999.
Accepted on: 20 April 1999.
___________________Journal of Infrastructure Systems
http://reply.papertrans.cn/2/175/17401/17401-19.png
Submitted on: 15 June 2002.
Revised on: 19 July 2002.
Accepted on: 06 September 2002.
___________________Journal of Infrastructure Systems