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Submitted on: 24 March 2003.
Revised on: 06 May 2003.
Accepted on: 02 June 2003.
___________________Frontiers of Information Technology & Electronic Engineering
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Submitted on: 22 October 2006.
Revised on: 17 January 2007.
Accepted on: 17 March 2007.
___________________Frontiers of Information Technology & Electronic Engineering
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Submitted on: 24 December 2016.
Revised on: 18 March 2017.
Accepted on: 04 May 2017.
___________________Frontiers of Information Technology & Electronic Engineering
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Submitted on: 17 December 2013.
Revised on: 17 January 2014.
Accepted on: 18 March 2014.
___________________Frontiers of Information Technology & Electronic Engineering