5Lafferty J, McCallum A, Pereira F. Conditional random fields: Probabilistie models for segmenting and labeling sequence data [C]// Proceedings 18th International Conference on Machine Learning. MA, USA: Morgan Kaufmann, 2001:282 - 289.
9Charoenpornsawat P,Sornlertlamvanich V.Automatic Sentence Break Disambiguation for Thai[C]//Proceedings of ICCPOL'01,Korea,2001:231-235.
10Chen,Stanley F,Goodman J.An Empirical Study of Smoothing Techniques for Language Modeling[R].Center for Research in Computing Technology,Harvard University,Technical Report:TR-10-98,1998.