Online Proposition, The Questions And Test Database System

Developing web teaching and reforming teaching methods is an inevitable tendency of the development of education. Examination is not only a traditional and effective method to assess teachers teaching effects, but a key link in web teaching. So research on item bank is important while developing network education system.How to organize the information of examination questions effectively and rationally is prerequisite of the development of examination items library. The first part of this paper is the analysis of the theory of the construction of examination bank and the theory in regard to examination, then the paper explains the current status , trends and principle of the construction of item bank and Computerized Adaptive Test(CAT).According to our school actual condition—separation of teaching from examination, the paper discusses the total frame on test questions library, the organizational structure of examination database system ,the algorithm in intelligent grouping test paper and the techniques and methods on system implementation.Aiming the insufficiency of the algorithm in rational grouping test paper, which does not make full use of the statistic information of the characteristic of questions in current item bank(item types, quantity, difficulty and knowledge points).In this dissertation, I focus on the problem of Multiple Constraint Weighted Deviations Problem(MCWDP), give the model of Example-based MCDWP,at last realize the intelligent test paper composition algorithm.J2EE is a platform for constituting application program on server side. In this paper I illustrate the design of on-line exam system based on J2EE architecture and do some research on role-based access control.In this system, gather and catalog of test questions, test papers automatic preparation and the safeguard and administer of the examination items library have been realized, which is suitable for the requirement of multi-disciplinary and multiple specialties. This system not only can high efficiency improve the level of teaching management, examinations, but can assess efficiency in teaching and measure accurately the candidates' true performance.