Submitted on: 10 July 2018.
Revised on: 06 August 2018.
Accepted on: 02 October 2018.
___________________AIP Advances---AIP PUBLISHING
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Submitted on: 13 August 1999.
Revised on: 07 September 1999.
Accepted on: 17 September 1999.
___________________AIP Advances---AIP PUBLISHING
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http://reply.papertrans.cn/1/11/1093/1093-25.png
http://reply.papertrans.cn/1/11/1093/1093-26.png
Submitted on: 09 February 2019.
Revised on: 30 April 2019.
Accepted on: 19 May 2019.
___________________AIP Advances---AIP PUBLISHING
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Submitted on: 08 December 2001.
Revised on: 21 February 2002.
Accepted on: 10 March 2002.
___________________AIP Advances---AIP PUBLISHING