排序方式: 共有7条查询结果,搜索用时 0 毫秒
1
1.
2.
Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion 下载免费PDF全文
A new Fe-based alloy that can be cast into a fully amorphous rod with a diameter of at least 16mm by the conventional copper-mould casting technique is obtained by partially replacing Fe with Co in a previously reported Fe-based bulk metallic glass. The preliminary thermodynamic analysis indicates that the Co-containing alloy has a significantly lower Gibbs free energy difference between the undercooled melt and the corresponding crystalline solid, compared to the Co-free alloy, reflecting the dramatic role of the Co addition in stabilizing the supercooled melt and facilitating glass formation in iron-based alloys. Here, a new criterion, derived from the classical nucleation and growth theory, is introduced to evaluate the glass-forming ability of Fe-based bulk metallic glasses. 相似文献
3.
4.
5.
6.
以注意力(attention)、切身性(relevance)、自信心(confidence)、满意感(satisfaction)四要素为驱动的ARCS学习动机模型是一种激发学生学习动机的教学设计模型。本文介绍在课程“结构模型概念与实验”中基于ARCS模型,在课堂中引入游戏教学法的改革实践。以实践类游戏为例展示了如何基于ARCS学习动机模型进行教学游戏设计,并介绍了课程中所采用的“米粉–棉花糖结构游戏”、“结构仿真平台严肃游戏”、“结构知识、一站到底”游戏、“静动载模型实验竞赛”等案例的实施情况。调查问卷等反馈结果表明:根据课程的特点,精心设计教学游戏并有机融入到课程中去,可提高课堂活力,激励学生主动学习,达到良好的教学效果。文章对其他相似的实验课程具有借鉴意义。
相似文献7.
安徽省第三轮教师继续教育的主题为“五个好”,即“备好课”、“上好课”、“评好课”、“命好题”、“育好人”.目前已进入到第四个主题,“命好题”阶段.作为一名县级教研员,笔者参与了我县“命好题”阶段的准备工作,自然就关注到教师命题的情况,发现教师的命题现状不尽如人意,令人担忧. 相似文献
1