http://reply.papertrans.cn/2/180/17939/17939-31.png
Submitted on: 15 January 2010.
Revised on: 12 May 2010.
Accepted on: 27 May 2010.
___________________Journal of Mechanical Engineering and Sciences
Submitted on: 19 September 1998.
Revised on: 18 November 1998.
Accepted on: 07 December 1998.
___________________Journal of Mechanical Engineering and Sciences
Submitted on: 08 June 1999.
Revised on: 12 August 1999.
Accepted on: 28 August 1999.
___________________Journal of Mechanical Engineering and Sciences
http://reply.papertrans.cn/2/180/17939/17939-35.png
http://reply.papertrans.cn/2/180/17939/17939-36.png