| The building and application of question bank system is an important work in promoting innovation of teaching technology and enhances teaching efficiency. This article, combining the actual request of secondary education for the question bank system as well as the two angels of safeguarding system security and improving examination paper quality, has carried on the design and realization of general multi-disciplinary question bank under the network environment by utilizing role based access control technology and genetic algorithms.This article analyzes the insufficiency of traditional access control. Based on the thorough study of RBAC96 access control model and RBACO model structure, this article has designed the realization scheme for the question bank system access control, which has facilitated user's jurisdiction management, guaranteed the smallest jurisdiction principle of role, strengthened the system security. In the design of grouping examination paper algorithm, this article studies the genetic algorithms principle and its application mode in grouping examination paper. In allusion to the problem due to a unit from under traditional binary valued chromosome encoding method, which carries insufficient information but to affect the algorithm conduct efficiency, this article proposes one kind of mixed subsection encoding method of binary and character. This kind of code scheme, to some degree, enhances the initial solution fitness, accelerates the algorithm search speed and improves algorithm efficiency. This article gives a detailed introduction to the operation process of the genetic algorithms of this code scheme treating with grouping examination paper.Based on the above study, this article conducts the design of whole system structure, system flow, function module division and so on and eventually completes the system code realization. At present the developed question bank system has been applied in our school's teaching program, and has produced the good results. |
PDF Full Text Request