[1] http://faostat.fao.org/site/339/default.aspx.
[6] Baye T M, Pearson T C, Settles A M. Journal of Cereal Science, 2006, 43: 236.
[7] Smirnov N. The Annals of Mathematical Statistics, 1948, 19(2): 279.
[8] Ye Jieping. Journal of Machine Learning Research. 2005, 6: 483.
[9] Cristianini N, Shawe-Taylor J. An Infroduction to Support Vector Machines. Cambridge: Cambridge University Press, 2000.