Research on Improved Model for Concept Similarity Computation in Domain Ontology and Application

With the extensive applications of ontology in information integration, the conceptual similarity calculation based on ontology has become more and more important Aiming at the shortcomings of the commonly used domain ontology concept similarity calculation method, an improved ontology concept similarity calculation model based on tree structure is proposed and constructed. Firstly, the XML document is transformed into a tree structure,and reconstructed by adding and recombining virtual nods; on the basis of traditional conceptual similarity calculation model of semantic distance, and considering the different proportion of different concepts in the ontology tree, the weight value is introduced and the weight calculation method is given, thus the similarity calculation model is improved. Finally, the similarity calculation experiment is carried out by constructing the drilling operation ontology tree. Experiments show that the proposed model utilizes the semantic information of the ontology concept and improves the accuracy of the concept similarity calculation effectively.