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Submitted on: 10 September 2011.
Revised on: 23 October 2011.
Accepted on: 15 November 2011.
TSINGHUA SCIENCE AND TECHNOLOGY
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http://reply.papertrans.cn/3/300/29999/29999-24.png
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Submitted on: 12 January 2009.
Revised on: 14 February 2009.
Accepted on: 06 March 2009.
TSINGHUA SCIENCE AND TECHNOLOGY
Submitted on: 04 July 1999.
Revised on: 17 August 1999.
Accepted on: 28 August 1999.
TSINGHUA SCIENCE AND TECHNOLOGY
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Submitted on: 08 November 2010.
Revised on: 06 December 2010.
Accepted on: 14 December 2010.
TSINGHUA SCIENCE AND TECHNOLOGY