A method for automatic recognition of typhoon disaster information based on classification rule

Information recognition from Chinese documents is an important task of typhoon disaster database foundation. Disaster metadata has the Place-Event structure, which has diversity in itself. Meanwhile, in the system of paragraphs and sentences of information sources, this structure also reflects the high clustering, as well as a degree of granularity. According to these characteristics, this article constructs a rule base correspondingly on the Event classification, then, it rewrites a regular expression matching procedure to extract the disaster information in the Event. It also establishes a place name database for Place recognition, but in this part it utilizes the hierarchy feature of place. Evaluation on test shows a reliable recall and precision rates of the technology.