Research On Knowledge Service Model For Learning Path

At present,learning activities through the online education environment have entered people's daily life.However,the correctness and efficiency of learning activities cannot be guaranteed with the lack of the leading role of teachers in the real environment.For this reason,this paper proposes a learning path knowledge service model to provide learning activity sequence guidance and related teaching resources and improve the accuracy and efficiency of learning activities.The research selects different modules of the semantic ontology throughout the knowledge service system.The semantic description of knowledge can eliminate ambiguity.In addition,the knowledge unit formed by the semantic ontology can provide a more precise and efficient constraint for the learner's learning activities.Moreover,the online learning resource instance is linked through the knowledge unit which can provide a variety of types of learning resources,complete knowledge visualization and knowledge services.The main research content and way includes the following three aspects:(1)Learning path constructionThe knowledge unit is constructed by semantic ontology,the organizational structure of the domain knowledge is optimized with the characteristics of the knowledge unit,and the sequence relationship between knowledge units is found in layers and classes.The optimized matching constraints of semantic ontology were added with the use of Jean's reasoning mechanism which can achieve the inference between knowledge units.According to the concepts of starting and ending for learning path,the prior knowledge that the learner has already possessed in the domain knowledge is studied,and the prior knowledge is obtained through test feedback.Then the correlation between the knowledge units is calculated,and the simple learning path is found by the relevance to find the next knowledge unit of learning.(2)Knowledge-based system for learning pathsThe simple learning path focuses on the terminology concept and knowledge structure display of the knowledge unit.Therefore,it is necessary to further explore the learning path for the knowledge activity process.This step is achieved by building a knowledge-based system.The foundation of the knowledge-based system is the ontology layer,and the core part of performing the inference function is the inference layer.The reasoning layer has a rule base and a more complex dynamic reasoning mechanism.Through querying,reasoning,and knowledge unit ontology evolution,generating accurate learning paths solves learning strategies in learning activities.(3)Knowledge service systemDesign the operation mechanism of the knowledge service system,build a system framework,and provide visual and multi-type knowledge services based on the knowledge unit learning sequence provided by the learning path.