Submitted on: 17 August 2002.
Revised on: 30 August 2002.
Accepted on: 19 September 2002.
Quantitative Science Studies---MIT PRESS
Submitted on: 07 September 2007.
Revised on: 09 October 2007.
Accepted on: 04 November 2007.
NULL
Submitted on: 29 February 2016.
Revised on: 02 April 2016.
Accepted on: 18 April 2016.
NULL
http://reply.papertrans.cn/3/260/25922/25922-34.png
http://reply.papertrans.cn/3/260/25922/25922-35.png
Submitted on: 15 November 2013.
Revised on: 16 December 2013.
Accepted on: 30 December 2013.
Quantitative Science Studies---MIT PRESS