| Traditional safety training exam of power companies due to the influence ofsubjective and objective unfavorable factors, the fairness of the exam and thereasonableness of the papers can not be guaranteed. Computer online exam systemcan solve these problems not only by automatically generating test and paper, butalso by standardization remark and other technical means. At present, most of safetytraining exam in power companies adopts the traditional exam method. Thetraditional exam method has been unable to meet the needs of the modern exam. Inview of this situation, this thesis developed a safety supervision online exam systemof power plant based on ASP.NET.Thesis first investigates and analyzes the present application status of safetytraining online exam system in domestic power companies, and on this basis,against the actual situation and the "power safety operation" test characteristics, forsafety supervision online exam system of power plant conducted needs analysis andfunctional design. Using UML (Unified Modeling Language) to model of the wholeonline exam system, and gives the use case diagram of system administrator module,safety inspectors modules, staff modules and the overall system.Secondly, the common security policy and algorithm are studied, proposes thealgorithmic based on Genetic Algorithm, designs the solutions and processes ofgenerating test paper, and proposes to select the strategy of generating test paper indifferent complexity of database size and the constraint conditions according to thealgorithm of random variables and Genetic Algorithm.At last, using object-oriented design techniques, designed the systemarchitecture, the overall framework and its function modules and database, using theASP.NET and C#programming language and Microsoft SQL Server2008databaseto design system software, realizing the function of the system, and using the blackbox testing method to test the system.This design has changed the traditional mode of thermal power plant safetyexam, there will be paperless online exam technology successfully into the thermalpower plant safety training exam, effectively improves the efficiency of enterprisesexam, and greatly saves the cost of test. The safety supervision online exam systemrepresentative, good expansibility and easy to maintain, can meet the demand forsafety training online exam system of power enterprise. |
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