Submitted on: 23 October 2016.
Revised on: 27 January 2017.
Accepted on: 26 February 2017.
___________________Electrical Engineering & Electromechanics
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Submitted on: 11 March 2004.
Revised on: 22 June 2004.
Accepted on: 17 August 2004.
___________________Electrical Engineering & Electromechanics
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Submitted on: 27 July 2005.
Revised on: 07 October 2005.
Accepted on: 30 November 2005.
___________________Electrical Engineering & Electromechanics
Submitted on: 04 June 2015.
Revised on: 12 July 2015.
Accepted on: 21 August 2015.
___________________Electrical Engineering & Electromechanics
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Submitted on: 11 January 2014.
Revised on: 17 March 2014.
Accepted on: 08 May 2014.
___________________Electrical Engineering & Electromechanics