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Submitted on: 21 September 2011.
Revised on: 11 November 2011.
Accepted on: 28 December 2011.
___________________ACTA MECHANICA SOLIDA SINICA---SPRINGER
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http://reply.papertrans.cn/1/4/376/376-34.png
Submitted on: 31 March 2013.
Revised on: 23 July 2013.
Accepted on: 13 September 2013.
___________________ACTA MECHANICA SOLIDA SINICA---SPRINGER
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