期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于“项目驱动式”教学模式下《煤矿开采学》课程教学内容区划
1
作者 雷东记 孟慧 《教育教学论坛》 2018年第25期192-193,共2页
针对《煤矿开采学》课程内容多又偏重实践,初学者一般难以理解和真正掌握的情况,提出"项目驱动式"教学模式下《煤矿开采学》课程教学内容区划和与其相匹配的"1+N"教学团队,先把教学内容划分为项目,项目下设置不等... 针对《煤矿开采学》课程内容多又偏重实践,初学者一般难以理解和真正掌握的情况,提出"项目驱动式"教学模式下《煤矿开采学》课程教学内容区划和与其相匹配的"1+N"教学团队,先把教学内容划分为项目,项目下设置不等的内容模块,然后把这些模块分配给相应老师,这种组合方式打破了教材章节顺序,避免了教师在台上泛泛地讲,学生在台下静静地听的局面,使学生的理论水平和技能操作达到新的层次。 展开更多
关键词 项目驱动 项目模块 教学内容区划 1+N教学团队
下载PDF
Experiment of dynamic property and transient magnetic effects of coal during deformation and fracture 被引量:3
2
作者 LI Cheng-wu WEI Shan-yang +2 位作者 WANG Xue-ying LIU Ji-kun lei dong-ji 《Journal of Coal Science & Engineering(China)》 2012年第3期258-261,共4页
Combining separated SHPB test device of Ф50 mm with ZDKT-type 1 transient magnetic resonance test system, long drop bar of 400 mm was used to impact coal specimens at four different speeds: 1.275, 3.287, 6.251, and ... Combining separated SHPB test device of Ф50 mm with ZDKT-type 1 transient magnetic resonance test system, long drop bar of 400 mm was used to impact coal specimens at four different speeds: 1.275, 3.287, 6.251, and 7.404 m/s. The change in waveform, the dynamic mechanical properties, and the generated effect of transient field during the coal deformation and fracture under the loads were discussed and analyzed. While magnetic signals during the coal fracture firstly needed EEMD, decomposition then had a FFT with Data Demon. The main results of the experiment are the following: the main frequency of magnetic signals was between 220 and 450 kHz and the instantaneous frequency during the damage of coal would have the instantaneous jump. 展开更多
关键词 SHPB transient magnetic field coal deformation FRACTURE
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部