| Intelligence Computer-assisted Instruction(ICAI) is a mainstream of today CAI application and development.With the development of computer technology and education,computer-assisted test is given recognition by people more and more.The examination and evaluation system is focused attention upon as an important sapect.In the first the paper introduced the actuality and development direction of test-questions database,the key technology and method used in the examination and evaluation system research and realize process.then discussed the design and realize method of the examination and evaluation system in the whole design.The system involved five model:test-questions database management model,component test paper model,examination model,] udgment and ananlyzing model,grade management model.During the process of the problem research,mainly exploring the statistical former of test-questions difficulty index verify in the test-questions database system,the arithmetic former of test-questions difficulty distributing in random select problem,the former of test-questions scores given,besides parts of the former was realized;Three create-paper method in the create-paper and examination:During the judgment and examination,in order to evaluate whether the students have attended the requirement of the education aim,bring out the education and judgment model depending on the signal-noise ratio,and done the principium research on the math about its application.The exploitation of system was done on the operation flat of windows 2000. On the stage the enable-visibility condition of PowerBuilder?.0 is . used.import the object-oriented design method,while the background databaseused the connection database of SQL Server 7.0.so these tools software help the design and realize cfsthe examination and evaluation system.During the realization of system,some arithmetic is realized by the C++langue,through interface application in the Power Builder7.0. so the layer application structure come true. |
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