The Study And Design Of Fuzzy Querying In Graduation Design Information Management System

With the development of modern information society, all kinds of information management systems have become more and more common. The more mature information technology is, the more universal its application is. Therefore, Graduation design management system that conforms to the college has come into being by use of information technology. The thesis aims at how to realize all sorts of fuzzy querying after filing the graduation thesis.What this article first introduces is the basic knowledge of the fuzzy mathematics theory, then what it establishes is fuzzy words and its corresponding membership function frequently used by the graduation thesis querying. Fuzzy language operator and the fuzzy language are introduced to expand fuzzy words; the introduction of weight aims to manifest the relations of all factors and make a more personalized search, at the same time, when discussing weight, precise value to express weight and fuzzy weigh with the aid of interval appear. Then, the article describes how Collection value statistics among the analytic method of interval weight determine the methods of weight, besides fuzzy expansion of having clause in SQL in details. In conclusion, the new technical introduction can bring much more and richer associations with fuzzy querying and realize more fuzzy querying to the filed graduation thesis in the graduation design management system.Finally, the article confirms the method accuracy and the reliability by carrying on simulated data and adopting two methods, positive solution method &negative solution method, which are able to transform fuzzy linguistics to standard SQL to test fuzzy querying which is discussed in the article.