Submitted on: 11 November 2012.
Revised on: 20 February 2013.
Accepted on: 14 March 2013.
___________________Journal of Electrical Engineering & Technology
Submitted on: 03 September 2013.
Revised on: 24 December 2013.
Accepted on: 11 February 2014.
___________________Journal of Electrical Engineering & Technology
Submitted on: 08 January 2011.
Revised on: 17 April 2011.
Accepted on: 17 May 2011.
___________________Journal of Electrical Engineering & Technology
Submitted on: 03 May 2004.
Revised on: 18 August 2004.
Accepted on: 23 September 2004.
___________________Journal of Electrical Engineering & Technology
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