Submitted on: 12 May 2009.
Revised on: 01 September 2009.
Accepted on: 04 October 2009.
___________________Frontiers in Mechanical Engineering-Switzerland
http://reply.papertrans.cn/2/102/10195/10195-32.png
http://reply.papertrans.cn/2/102/10195/10195-33.png
Submitted on: 01 January 2007.
Revised on: 23 April 2007.
Accepted on: 13 June 2007.
___________________Frontiers in Mechanical Engineering-Switzerland
Submitted on: 09 November 2012.
Revised on: 17 February 2013.
Accepted on: 30 March 2013.
___________________Frontiers in Mechanical Engineering-Switzerland
http://reply.papertrans.cn/2/102/10195/10195-36.png