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荡起“学导”双桨 驶向知识彼岸——“教学做合一,学与导互助”教学模式例谈
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作者 潘丽君 《牡丹江教育学院学报》 2006年第2期73-74,共2页
教、学、做合一,是伟大的教育家陶行知生活教育理论的主体之一,它揭示了教育的实质,即“教的法子要根据学的法子,学的法子要根据做的法子。教法、学法、做法应该是合一的。”本文通过对以往教学的反思和自己对课堂教学模式的摸索及实践... 教、学、做合一,是伟大的教育家陶行知生活教育理论的主体之一,它揭示了教育的实质,即“教的法子要根据学的法子,学的法子要根据做的法子。教法、学法、做法应该是合一的。”本文通过对以往教学的反思和自己对课堂教学模式的摸索及实践,以陶行知生活教育观为指导,提出构建“教学做合一,学与导互助”的教学模式,以适应师范学校培养未来合格小学教师的需要。 展开更多
关键词 做合一 与导互助 诱导试学 引导探 开导活
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Reliability Improvements to Centrifugal Pump Performance in Conjunction with Inducers, CFD Comparative Study 被引量:1
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作者 Said A. F. Hawash Dalia M. S. EI Gazzar Mohamed A. EI Samanoudy 《Journal of Earth Science and Engineering》 2015年第5期296-305,共10页
In this research, centrifugal pump unit was analysed to study the effects of using inducers on its performance. Hydraulic tests were done to obtain the optimum hydraulic performance before and after using inducer. Two... In this research, centrifugal pump unit was analysed to study the effects of using inducers on its performance. Hydraulic tests were done to obtain the optimum hydraulic performance before and after using inducer. Two types of inducers were used in this work (axial, helical). For this purpose, a test rig was specially designed with a pump system to investigate the parameters under consideration. Plots (H-Q) curves, (B.P.-Q) curves and (q-Q) curves were used to show the effect of pump performance with and without inducers. The present study introduces a simulation of centrifugal pump performance in conjunction with inducers using CFD (Computational Fluid Dynamics), to compare it with experimentally observed values. The model investigates the impact of using inducers on the head and flow of the pump. The results of the CFD model and experimental are correlated well. Furthermore, the results help the decision makers of the pumps for future developments in pump performance assuring safe and reliable running condition of the water pumps. Also it may be used for more applications of larger head and flow pumps. 展开更多
关键词 Centrifugal pump axial helical inducers hydraulic performance CFD simulation NPSH.
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