Refining algorithm of pattern rule set for detecting noun phrases in English

This paper presents a way of increasing accuracy of detecting English noun phrases with pattern matching. The present approach is based on a refining algorithm of pattern rules extracted from the Penn TreebankS corpus. The refined rule set serves as identification of noun phrases in English sentence. The method of identifying noun phrases is explained. The algorithm to obtain the best set of pattern rules is introduced for two steps to refine pattern rule set. Some experiments are performed to evaluate the effectiveness of detecting noun phrases. Careful consideration is given to ineffective pattern. Results of future experiments are estimated.