The Research Of Question Answer System In The Distance Education

With the development of Internet in our country, the people pay more attention to the distance education. The distance education not only means putting the study information on the net, but also means communicating between students and teachers. Communication is more importance, because of the distance. So, the question answer system is one key parts of the distance education.The face to face can't appear in the distance education that always is seen in the traditional education. There three main question answer systems: e-mail, charting and key word searching. The shortcoming of e-mail is that this system can't give students answer in time and answer several times for the same question; Charting asks teachers on the net all the time. They all waste a lot of teacher's and answer's resource. The third of system needs students know much knowledge about the searching and increases students burden. The article imports some new technology and improves the model of question answer system to resolve those questions.The author makes use of natural language process technology and advances a new sort of question answer system of natural language in limited domain. The system accept the natural language question and know what about the question, then the system give out a set of answers related to the question. There are three Characteristics in the question answer system, retrenching resource, intelligence, and high efficiencyComparing with the foreign question answer system, the paper points out that the shortcoming of our system is lack of advancing technology. Firstly, the article introduces the technology about natural language process and designs the structure of the system. Secondly, the author turns up this system and discusses some key art and makes some program on the arithmetic. Finally, the paper thinks that the system is utility and is deeply researched in the future.The main work of this paper is as the following: Designing precept of the key of and realizing it; Improving arithmetic of similarity; Importing index structure and the tactic of the two level searching.