Construction Of Chemical Knowledge Graph And Realization Of Visual Query System

Knowledge graph is an emerging knowledge management method that emerges with the information revolution.It aims to form a systematic and standardized structure of huge and redundant knowledge.It is used to mine and visualize the structure of knowledge and the relationship between knowledge.Based on the scattered knowledge points of junior high school chemistry,students are more difficult to remember and understand and the storage of knowledge points is isolated,which leads to unclear thinking in solving comprehensive problems.In addition,most students lack the consciousness of integrating their own knowledge.It is difficult to construct your own subject knowledge structure.In this paper,knowledge graph technology is used to construct the knowledge graph of junior middle school chemistry subject,which is used to reveal the knowledge system of chemistry subject,standardize the structure of knowledge structure,and establish the relationship between knowledge points.Through literature analysis,this paper understands that constructing knowledge graphs is often based on the concept of domain knowledge ontology.In this study,the "five-step construction method" of the general subject ontology was selected as the basic method,combined with the ontology data model of the chemistry subject designed in this paper,the goals and methods of ontology construction of the chemistry subject were proposed.The development method is based on the design and development of an online query website system based on the chemistry knowledge atlas of junior high school for teachers and students to provide practical support for the applied research of the chemistry knowledge atlas,using questionnaire surveys and teacher-student interviews to collect data for teachers and students.The results of the study show that the learning method based on the knowledge map of chemistry can increase students' interest and confidence in chemistry,enhance the initiative of learning,and help them get a good emotional experience.It also enhances the students' ability to grasp the overall structure ofchemistry and the relationship between knowledge memory and knowledge points,thereby promoting the formation of chemical knowledge structures.