排序方式: 共有24条查询结果,搜索用时 15 毫秒
1.
2.
3.
许栋生 《中国小学语文教学论坛》1991,(7)
近些年来,随着教学改革的不断深入,教学节奏被越来越多的同志谈论、重视.许多人从教学实践中体会到,适当地调整教学节奏,合理地配置教学密度,是提高教学效益的行之有效的方法.前不久,笔者受一所城镇中学之邀,听了10多节课.听课归来.感触颇多,觉得目前不少教师的课堂教学效益不高,存在的主要问题便是节奏失调.其主要表现是:一、讲练失调.一些同志习惯于沿用传统的讲析法,不论何种教材,都采用老师讲学生听的老套路,常常是45分钟一讲到底,不给学生安排思考、练习的时间,或练习时间过短,占不到一节课的 相似文献
4.
5.
6.
经济建设高速发展和科学技术突飞猛进,需要培养大量的各级各类具有创新意识和能力的人才。为实现这一目标,必须提升现有教师队伍的专业化水平,特别是使每一所学校都有一支优秀的教师队伍,促进教师专业化水平的发展,切实提高教育、教学质量,真正办出让人民群众满意的教育。为此,我们多次开展教师培训工作,取得了一定的成绩,同时也存在着很多不足:一是培训内容确定的随 相似文献
7.
9.
A numerical simulation of the interaction between laminar flow with low Reynolds number and a highly flexible elastic sheet is presented. The mathematical model for the simulation includes a three-dimensional finitevolume based fluid solver for incompressible viscous flow and a combined finite-discrete element method for the three-dimensional deformation of solid. An immersed boundary method is used to couple the simulation of fluid and solid. It is implemented through a set of immersed boundary points scattered on the solid surface. These points provide a deformable solid wall boundary for the fluid by adding body force to Navier-Stokes equations. The force from the fluid is also obtained for each point and then applied on the boundary nodes of the solid. The vortex-induced vibration of the highly flexible elastic sheet is simulated with the established mathematical model. The simulated results for both swing pattern and oscillation frequency of the elastic sheet in low Reynolds number flow agree well with experimental data. 相似文献
10.