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Submitted on: 19 July 2016.
Revised on: 02 November 2016.
Accepted on: 13 December 2016.
___________________Energy Sustainability and Society
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http://reply.papertrans.cn/1/85/8418/8418-34.png
Submitted on: 23 March 2014.
Revised on: 04 May 2014.
Accepted on: 17 May 2014.
___________________Energy Sustainability and Society
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