Xu Tianwei

  • Citations Per Year
Learn More
A formal model of agent-based knowledge management in intelligent tutoring systems is presented in this paper. It consists of three agents, a knowledge acquisition agent, a knowledge distribution agent and a knowledge maintaining agent. The knowledge acquisition agent is responsible for the construction of user model and domain knowledge base. The knowledge(More)
In representing ontologies there are two kinds of default statements: one is the default assertions which say that some concept has some property defaultly, another is the default inheritance of default assertions. The latter actually is a default rule of default rules (called super default rules), that is, a default rule in which the formulas occur in the(More)
Learner models are of great importance in the construction of intelligent tutoring systems. In this paper, after introducing intelligent tutoring systems and learner models, four kinds of classical learner models called Stereotypes Models, Overlay Models, Buggy Models and Constraint-Based Models and their properties are discussed in detail. Finally, we(More)
A model of a Web-based personalized intelligent tutoring system with a user module, a resource management module, a pedagogical module and a guide module is presented in this paper, and the realization of the system and its properties are discussed. The user module makes use of learnerspsila knowledge levels, psychological characteristics and learning(More)
A formal model of a personalized recommendation system in intelligent tutoring systems is presented in this paper. Users' queries, domain knowledge, user models and teaching knowledge extraction processes are four key factors that support a personalized recommendation system. After introducing the construction of domain knowledge and user models, the formal(More)
  • 1