http://reply.papertrans.cn/2/166/16522/16522-21.png
http://reply.papertrans.cn/2/166/16522/16522-22.png
http://reply.papertrans.cn/2/166/16522/16522-23.png
Submitted on: 11 May 2015.
Revised on: 22 July 2015.
Accepted on: 26 August 2015.
___________________JOURNAL OF ELECTROSTATICS---ELSEVIER
Submitted on: 10 January 2017.
Revised on: 26 April 2017.
Accepted on: 13 June 2017.
___________________JOURNAL OF ELECTROSTATICS---ELSEVIER
Submitted on: 18 September 2001.
Revised on: 03 January 2002.
Accepted on: 20 January 2002.
___________________JOURNAL OF ELECTROSTATICS---ELSEVIER
Submitted on: 31 January 2018.
Revised on: 19 March 2018.
Accepted on: 08 April 2018.
___________________JOURNAL OF ELECTROSTATICS---ELSEVIER
Submitted on: 16 December 2006.
Revised on: 12 January 2007.
Accepted on: 04 February 2007.
___________________JOURNAL OF ELECTROSTATICS---ELSEVIER
http://reply.papertrans.cn/2/166/16522/16522-29.png
http://reply.papertrans.cn/2/166/16522/16522-30.png