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浅谈职教机械类课程教学中学习动机的激发 被引量:1
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作者 程海军 《科教导刊》 2013年第4期176-177,共2页
近年来,职业院校学生在学习机械类课程时存在学习动机不足的问题。本文探讨了在实际的教育教学活动中激发和维持学生学习动机的具体方法和措施。
关键词 学习动机 外来动机 内在动机 激发
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A Study on Alien Invasive Plants from the Interactive Mechanism between Species Niche and Material/Energy Flow 被引量:3
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作者 陈剑 喻庆国 杨宇明 《Agricultural Science & Technology》 CAS 2011年第1期14-19,共6页
[Objective]This study was to reveal the essence of mechanism about how the alien invasive plants spread.[Method]Species niche and material/energy flow were used as basic research indicators to analyze the intrinsic me... [Objective]This study was to reveal the essence of mechanism about how the alien invasive plants spread.[Method]Species niche and material/energy flow were used as basic research indicators to analyze the intrinsic mechanism of alien plants invasion.[Result]Most of the invasive plants have not been explicitly defined and their effective control methods not brought forward.[Conclusion]Overrun of alien invasive plants depends on whether the niche of a species could be continuously met at spatial level.Based on this we put forward corresponding control measures,proposed an assumption to establish a cylinder-network model and discussed the definition of alien invasive plants. 展开更多
关键词 Species niche Material/energy flow Alien invasive plants Interactive mechanism
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