Research on Emergency Knowledge Retrieval Mechanism Based on Domain Ontology

In this paper, on the basis of constructing domain ontology database and designing meta-search engine, and relying on the reasoning mechanism of domain ontology and abundant internet sources, we propose the emergency domain ontology-based intelligent meta-search system and carried out the example verification. The results show that the model has great practical significance. The introduction of meta-search engine into the domain source retrieval expands the coverage of the search, enhances the recall ratio of source retrieval and improves the retrieval accuracy and intelligent level of search engine through constructing domain ontology database.