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Research and Implementation of Intelligent Question Answering System Based on Ontology

Author: XuJin
Tutor: LiYunQing
School: Jiangxi Normal University
Course: Computer Science and Technology
Keywords: Intelligent Question Answering System Ontology Search Engine
CLC: TP311.52
Type: Master's thesis
Year: 2010
Downloads: 60
Quote: 0
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Abstract

In recent years, with the popularity of the network and demand for knowledge, distance education has been paid more and more attention. Question answering system is an indispensable tool for teaching network, so it becomes a hot issue in the field of network teaching. Question answering system can answer students’questions timely, eliminate students’learning disabilities and increase communications between students and teachers. So, it plays a very important role in the development of Chinese education career. However, the traditional question answering systems have many shortcomings: lack of intelligence, incapable of share and enable to answer questions which are not in knowledge.The author researches the present situation and development of intelligent question answering system at home and abroad, key technology of developing areas ontology and the use of search engine, and then presents an idea which use ontology and search engine in the intelligent answering system. The author uses domain ontology to obtain common concepts and relationships between them, defines the concept of this field and the relationship between them, solves the problems of knowledge sharing and helps users to grasp and utilization knowledge. As for problems that not in the knowledge, users can choose Internet search and the system searches relevant information automatically, and then returns a good sort of results to users according to the similarity ranking size.The research work of this study includes the following aspects:1. The author analyzes the research status and problems of current intelligent question answering system, points out several problems of traditional intelligent question answering system and introduces the concepts of ontology.2. The author designs an intelligent question answering system based on ontology model,uses the concept of ontology to describe domain knowledge, and constructs a knowledge-based system which is in the core of computer system ontology. So this system can solve the problem of knowledge sharing.3. The author introduces the method of using search engine into intelligent question answering system based on ontology. Though using the technology of search engine, the recall-precision of the system is improved.4. According to the idea of this design, the author realized a prototype system to test the performance of the model. Experiments show that the system can basically realize the semantic understanding, and work satisfactorily in the accuracy of the question answer mission.

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