Submitted on: 03 September 2007.
Revised on: 10 December 2007.
Accepted on: 24 December 2007.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
Submitted on: 09 September 2013.
Revised on: 29 October 2013.
Accepted on: 10 November 2013.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
http://reply.papertrans.cn/2/143/14206/14206-33.png
http://reply.papertrans.cn/2/143/14206/14206-34.png
http://reply.papertrans.cn/2/143/14206/14206-35.png
Submitted on: 20 October 2018.
Revised on: 28 January 2019.
Accepted on: 01 March 2019.
___________________INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE