Research And Implementation Of Automatically Marking System For University PB Teaching Examination Program Design Question

With the development of educational achievements and the popularization of computer education, the application of computer has become a necessary personal ability. The computer examination has entered every aspect of social life. The more subjectivity of computer examination increases, the heavier workload of teachers is required. The veracity of subjects are attracted more and more attention. It has become a historic trend that we realize automatic marking papers in order to increase the efficiency of grading papers and guarantee the impartiality. With the increasing of the numbers of the program-designed question, automatic grading papers are getting more and more important. PowerBuilder is one of the excellent program languages for Windows. It plays an important part in programming training and programming test. In order to test the students' programming ability in PB, an automatic grading system for PB has been developed. Thus, developing a system of automatic papers is more meaningful.Firstly, in this paper we discuss the status and development of the research on the automatic technology of computer-based examination in detail. Secondly, we set a strong purpose of some questions and requirement for the University. According to the production from Britain Nottingham Course Master system and the auto-check system of the VB program designing put forward by DuanhanZhou of Shanghai university, according to the technical researching of the main points match and mode match, the author gives his opinion that grammatical judgments and main points analysis are the two main steps for automatic grading system, and avoid the unfair judgments from oneness of automatic grading system. The application of dynamic link library makes the program more extensive and protective. Taking the creditable and applicable database ---Oracle---as background library. It is beneficial for system stability and data security. Truth approaches the algorithm and the procedure tests algorithms become the basis of the main points matches algorithms. And at the same time, they improve and innovate the automatic grading system.During the development of the Automatic Marking System for PB, practicability is mosly emphasized. Preparatory testing result has proved that automatic judging module can run steadily and unify grading standard.