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This paper proposes a user evaluation framework for Web-based learning systems by adopting the concepts of evaluation index systems and the techniques of data mining. In the proposed framework, the evaluation and the guiding of users are through-out the whole process of learning. A flexible and extensible user evaluation model is proposed to analyze users'(More)
With the development of computer science and multimedia technology, Web-based learning becomes increasingly popular. User evaluation plays a significant role in the process of guided learning. In recent years, there is great progress in the development of evaluation technology. However, few evaluation methods fully take online learning activity analysis and(More)
In 1st July 2007, China Government formally started a great project named "The Second Survey for the Land and Resources". China plans to investigate the current landuse status, and realize the land and resource informatization during two and a half years. Vectorization of Scanning Landuse Map plays an important role in land informatization and digital land(More)
The work was supported by Shanghai Science and Technology Committee (SDC project, No: 047062003) and also supported by National Natural Science Fund (No. 60676013). Abstractthis paper describes a novel architecture, which can achieve adaptive voltage position without sensing any load current. In the context, the architecture and algorithms of the controller(More)
In recent years, computer-based testing has become an effective approach to evaluate students’ learning level. In our previous work, a personalized genetic algorithm (PGA) for test sheet assembling was proposed. In this paper, an improved personalized genetic algorithm named PGAC which makes an improvement in the crossover process of PGA is presented.(More)
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