Submitted on: 30 April 2002.
Revised on: 23 August 2002.
Accepted on: 08 October 2002.
___________________IEEE Systems Journal---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Submitted on: 29 January 2008.
Revised on: 13 April 2008.
Accepted on: 28 April 2008.
___________________IEEE Systems Journal---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Submitted on: 06 April 2006.
Revised on: 06 July 2006.
Accepted on: 10 August 2006.
___________________IEEE Systems Journal---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Submitted on: 26 July 2004.
Revised on: 25 October 2004.
Accepted on: 29 November 2004.
___________________IEEE Systems Journal---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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