深于核心素养 导以体验支架——指向高中物理核心素养的深度学习策略

深度学习是学习者身心与学习情境共同交互的具身化过程,指向物理核心素养,体现在物理观念之深刻、科学思维之深化、科学探究之深究、科学态度与责任之深切.搭建体验式学习支架,能促进学生的学习.体验式学习支架的搭建可实行如下策略:巧用现代媒体,增添学习交流的角度;投身兴趣活动,拓宽知识运用的广度;利用层级设问,铺设科学思维的梯度;借助科学史实,感悟科学探索的厚度;优化评价办法,体验思维过程的温度;融合特色项目,提升地方课程的用度.

The research of the evaluation system for the sealability of hydraulic supports and jacks＇ seals

In order to enhance the sealing quality and assemble efficiency of hydraulic supports, the evaluation system for the sealability of the hydraulic support and jack＇s seals was established through the testing and experimenting technology in respects, such as seals＇ dimensions, reasonable amounts of compression, sealability, life, resistance to pressure, etc. Through life detecting test of the seal, found the longest life seal ring under the same conditions, and through the reciprocating test of the hydraulic support, found the most appropriate amount of interference between the groove and the seal ring, thus, to decrease the leakage and extend the life span of the hydraulic support.