Submitted on: 15 April 2011.
Revised on: 08 May 2011.
Accepted on: 03 June 2011.
___________________Journal of Physics-Energy---IOP PUBLISHING LTD
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Submitted on: 11 March 2020.
Revised on: 30 May 2020.
Accepted on: 19 June 2020.
___________________Journal of Physics-Energy---IOP PUBLISHING LTD
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http://reply.papertrans.cn/2/188/18767/18767-35.png
Submitted on: 18 July 2012.
Revised on: 06 November 2012.
Accepted on: 04 January 2013.
___________________Journal of Physics-Energy---IOP PUBLISHING LTD