Network Exam System Design And Implement Base On Delphi

With the development of the economy and the society, the popularization of education for life and the improvement of the computer skills, there are non-paper exam system. It is the outcome of the combination among the computer science and the measure theory. According to the fact in the army, this paper developed a on-line examination system, which realized the supervision of the exams in the army and the systematism,the standardization and the automation of the exams. It improved the efficiency of the governing department in the army.This system is based on SQL Server 2000 as background service data-base, while the foreground applications are developed by Delphi, and use the design of C/S system, to realize the aim of building and supervising the students' data-base. The system mainly consists of 4 subsystems: supervision subsystem, examination subsystem, test questions subsystem and reading examination paper subsystem, which realizes the functions of supervising the information of the students , the examination and the grading. This supervision system can enhance the managing of the students' information to realize the intercourse among people, computer and the data and make information administrators supervise information by management information system, which greatly improves the system efficiency.The key of this system is the in-depth research on the auto-reading strategy of the on-line examination. It provides an improved method based on traditional genetic algorithm: the design of subsection utilize paragraphed interger coding, overcome the defect of complex calculate of the binary system, cancel coding and decodeing,at the same time ,using same type complete section to cross, mutation in the section , cross in a whole segment, mutation in section when generation operators operate. It reflected well the basic characteristics of making test paper problem and the fact of actual making test paper, reduced the difficulty greatly and enhanced the genetic algorithm performance and the efficiency ; Moreover, this system adopt the auto-adapted crossover probability and the mutation probability, increasing the population individual multiplicity, restraining premature phenomenon.The realization of this system can improve the all-around building of the army, especially the information building, which is so meaningful that can economize energy resources and reduce the burthen of higher-up department. This system is full of practicability and should be generalized energetically.