Submitted on: 13 July 2014.
Revised on: 15 August 2014.
Accepted on: 02 September 2014.
Machines---MDPI
Submitted on: 22 May 2002.
Revised on: 05 July 2002.
Accepted on: 16 July 2002.
Machines
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Submitted on: 26 October 1999.
Revised on: 28 November 1999.
Accepted on: 13 December 1999.
Machines---MDPI
Submitted on: 16 November 2004.
Revised on: 01 December 2004.
Accepted on: 19 December 2004.
Machines
Submitted on: 18 July 2022.
Revised on: 04 August 2022.
Accepted on: 24 August 2022.
Machines---MDPI
http://reply.papertrans.cn/3/211/21099/21099-17.png
Submitted on: 16 October 2012.
Revised on: 23 November 2012.
Accepted on: 07 December 2012.
Machines
Submitted on: 25 February 2004.
Revised on: 04 April 2004.
Accepted on: 13 April 2004.
Machines---MDPI
http://reply.papertrans.cn/3/211/21099/21099-20.png