| An online examination and data visualization analysis system is designed and implemented in this thesis.The system includes three actors: administrator,teacher,and student.The system realizes the modules of user management,course management,class and profession management,subject management,examination business and posttest data visualization analysis.It provides a complete solution for the examination and post-test data analysis.Examination business and post-test data Visualization analysis business is the core function of the system.The system has realized the function of manual input questions,automatic set examination paper,automatic judgment and automatic statistics.It effectively improves the efficiency of examination and post-test analysis.In the technical framework,the system uses PHP-based CodeIgniter framework and MySQL implementation.It alse uses the appropriate technology to achieve some special needs.The system uses the front-end framework Bootstrap to adapt and test different sizes of devices.Teachers and students can use the system on both PC and mobile devices.In the aspect of examination data analysis,the system uses ECharts to display the statistical results of the post test data in visual form.Data analysis includes the error distribution of test module,the achievement distribution of students taught by teachers and other teaching reference significance of the information.The system also uses Kmeans algorithm to mine the potential information in the data,which divides students‘performances into several categories.Teachers can analysis performance characteristics and carry out specific teaching according to these information.The online examination and data visualization analysis system realized in this paper provides the solution and reference for the examination process under the Internet scene.For the use of Internet technology to solve the current test problems and data analysis problems,the system provided in this paper is a good attempt. |
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