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http://reply.papertrans.cn/2/184/18376/18376-32.png
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Submitted on: 09 September 2009.
Revised on: 28 December 2009.
Accepted on: 08 January 2010.
___________________Journal of Numerical Mathematics
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Submitted on: 24 July 2003.
Revised on: 16 October 2003.
Accepted on: 11 December 2003.
___________________Journal of Numerical Mathematics