http://reply.papertrans.cn/1/83/8245/8245-21.png
http://reply.papertrans.cn/1/83/8245/8245-22.png
Submitted on: 05 April 2008.
Revised on: 26 April 2008.
Accepted on: 27 May 2008.
___________________Elektronika Ir Elektrotechnika
http://reply.papertrans.cn/1/83/8245/8245-24.png
http://reply.papertrans.cn/1/83/8245/8245-25.png
http://reply.papertrans.cn/1/83/8245/8245-26.png
http://reply.papertrans.cn/1/83/8245/8245-27.png
http://reply.papertrans.cn/1/83/8245/8245-28.png
Submitted on: 28 August 2004.
Revised on: 02 October 2004.
Accepted on: 01 December 2004.
___________________Elektronika Ir Elektrotechnika
http://reply.papertrans.cn/1/83/8245/8245-30.png