Submitted on: 27 April 2007.
Revised on: 02 June 2007.
Accepted on: 14 June 2007.
Machines---MDPI
Submitted on: 06 October 2017.
Revised on: 19 November 2017.
Accepted on: 30 November 2017.
Machines---MDPI
http://reply.papertrans.cn/3/211/21100/21100-23.png
http://reply.papertrans.cn/3/211/21100/21100-24.png
Submitted on: 16 November 2012.
Revised on: 19 December 2012.
Accepted on: 05 January 2013.
Machines
Submitted on: 08 September 2016.
Revised on: 09 October 2016.
Accepted on: 28 October 2016.
Machines
http://reply.papertrans.cn/3/211/21100/21100-27.png
Submitted on: 28 July 2005.
Revised on: 09 August 2005.
Accepted on: 19 August 2005.
Machines
http://reply.papertrans.cn/3/211/21100/21100-29.png
http://reply.papertrans.cn/3/211/21100/21100-30.png