Research And Implementation Of The Intelligent Question Answering System Based On .NET Framework

While the Intelligent Question-Answering System (IQAS) has been widely accepted as a substantial part of E-education, its core technology is by far not matured. Ongoing research efforts have been put on developing a lot of technologies in IQAS. This paper researches and implements an IQAS based on .NET framework.This paper firstly analyzes the research status of IQAS on the Internet at the home and abroad. Based on the emerging demands in web education as well as the state-of-art development of relevant technologies, definitudes the tasks of this paper.In the stratagem of Microsoft .NET framework, ASP.NET is a key techonology, using the techonology of ASP.NET can develop powerful and dynamic and mutual web application in a server. This paper analyzes the superority and instrumentality of .NET techonlogies in developing IQAS.After analysis of some existing text retrieval models and the evaluation of full text retrieval (FTR) system performance, the paper introduces the architecture and central data stream of Dotlucene, which is open source FTR engine, and a method based on DotLucene has been put forward to Chinese-based FTR engine in develop local IQAS.Then, this paper brings forward a new method of natural language processing in limited field on the basis of full text retrivel. The method detoures difficulties of word segmentation in the natural language processing, and uses the keywords in the keyword list to matching the natural language text in order to get the keyword combination, to realize answering the question that is asked with natural language.Lastly, the paper constructs the framework of IQAS by using ASP.Net and ADO.Net technologies, and implements the IQAS integration the functions of browse, search and ask with nature language. As a result, the method and technologies presented in this paper are proved effective and reasonable. It makes a good result in web-based IQAS.