Research And Development Of Interrelated Techniques On Online Homework System For Mechanical Courses

With the development of informatization technology for education, conventional homework mode has been taken place by online homework technology. The reform on students'homework has not only improved the quality of teaching, but also reduced the teachers'workload greatly. But three problems are still involved in online homework system: coupling recognition of graphs and symbols, prevention to homework plagiarism in advance, homework system data interface. Based on the recognition technologies developed in the Intelligent Grading System(IGS), the above three problems are studied in this thesis.1) Coupling recognition of labels, graphs and formulaAs the problems of many mechanical courses concerned, the relationship between labels and graphs, coupling recognition of labels and graphs are established. Meanwhile the coupling recognition of labels, graphs and formula are also studied. Therefore the IGS is able to correct the problems containing a lot of labels, graphs and formula automatically.2) Random problem conditionsFor many complex problems in the mechanical courses, random values can be assigned to the variants of a problem. The definition, syntax checking, generating and recognition of random problem conditions are established in this paper. The new IGS allows teachers to design the random problem conditions, create unique conditions for different students and correct the problems with different conditions in order to prevent copying homework in advance.3) Homework system data interfaceSince there still has no connection between the educational administration information system and the remote intelligent homework system in southwest jiaotong university,the information cannot be shared with each other. This situation brings the information isolated island. In order to solve the most urgent problem of transmiting score data from homework system to education administration, a score data export interface is designed in which the technology of ADO database access interface and the technology of data manipulation by file stream mode have been used. By means of this interface,the remote intelligent homework system allows the user to export the score data for optional fields to Microsoft Excel and Microsoft Access files.