A Chinese Parser Based on Probabilistic Context Free Grammar
Guo Feng · Zhongwen xinxi xuebao · 2006
This paper studies the limitations of probabilistic context free grammar,and proposes a concept of co-occurrence in syntax structure so as to use the context information.To address the limitation of the Chinese Treebank's small scale,an Inside-Outside algorithm to obtain the parameters of syntactic rules is given.At last,we present a probabilistic top-down Chinese parser.In the closed test,we get the result that label precision and label recall are 88.1% and 86.8%, showing that this method has potential to get a better performance in parsing and deserves further research.