Submitted on: 28 August 2004.
Revised on: 15 September 2004.
Accepted on: 25 September 2004.
Results in Physics
http://reply.papertrans.cn/3/266/26501/26501-22.png
Submitted on: 19 October 2020.
Revised on: 07 November 2020.
Accepted on: 23 November 2020.
Results in Physics---ELSEVIER
http://reply.papertrans.cn/3/266/26501/26501-24.png
http://reply.papertrans.cn/3/266/26501/26501-25.png
Submitted on: 07 January 2004.
Revised on: 01 February 2004.
Accepted on: 10 February 2004.
Results in Physics---ELSEVIER
Submitted on: 05 February 2011.
Revised on: 25 February 2011.
Accepted on: 16 March 2011.
Results in Physics
http://reply.papertrans.cn/3/266/26501/26501-28.png
http://reply.papertrans.cn/3/266/26501/26501-29.png
Submitted on: 30 January 2011.
Revised on: 15 February 2011.
Accepted on: 08 March 2011.
Results in Physics