Submitted on: 09 September 2015.
Revised on: 28 November 2015.
Accepted on: 21 January 2016.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS
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Submitted on: 25 June 2001.
Revised on: 20 October 2001.
Accepted on: 05 December 2001.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS
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http://reply.papertrans.cn/2/103/10268/10268-15.png
Submitted on: 17 June 2011.
Revised on: 30 August 2011.
Accepted on: 21 October 2011.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS
Submitted on: 29 March 2021.
Revised on: 24 July 2021.
Accepted on: 25 August 2021.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS
Submitted on: 30 January 2008.
Revised on: 27 April 2008.
Accepted on: 23 May 2008.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS
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Submitted on: 24 April 2024.
Revised on: 16 August 2024.
Accepted on: 30 August 2024.
___________________Frontiers of Physics---HIGHER EDUCATION PRESS