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(2001). Qualitative reasoning techniques to support learning by teaching: The teachable agents project. Abstract This paper describes the use of qualitative reasoning mechanisms in designing computer-based teachable agents that users explicitly teach to solve problems using concept maps. Users can construct the required problem-solving knowledge structures(More)
In the field of engineering technology components, electromagnets are widely used. its performance tests are as hot spots, force characteristics effect the whole electromagnetic actuators, it is very necessary to do research on this. The paper finish it with a test stand, on the one hand, the test stand can measure relationship between displacement and(More)
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