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物理教学中主体-主导-主线的辩证关系
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作者 彭玲 《山西教育(管理版)》 1997年第12期34-35,共2页
物理教学中主体主导主线的辩证关系彭玲教学目的必须通过学生主体的学习实践得以实现,效果的优劣是学生学习积极性的直接体现。要想使教学卓有成效,起驾驭作用的教师必须通过主导地位最大限度地调动学生的积极性,最大限度地发挥学生... 物理教学中主体主导主线的辩证关系彭玲教学目的必须通过学生主体的学习实践得以实现,效果的优劣是学生学习积极性的直接体现。要想使教学卓有成效,起驾驭作用的教师必须通过主导地位最大限度地调动学生的积极性,最大限度地发挥学生主体的主观能动性。把以教师为主导和... 展开更多
关键词 物理教学 学生主体 主线程序 电教媒体 辩证关系 主导 投影器 温度计 《大气的压强》 运动状态
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Small symmetrical deformation and stress analysis of catenary shells of revolution
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作者 Bo-Hua Sun 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2022年第2期119-129,I0004,共12页
The catenary shells of revolution are widely used in church constructions due to their unique mechanics'features.To have a better understanding of the deformation and stress of the catenary shells of revolution,we... The catenary shells of revolution are widely used in church constructions due to their unique mechanics'features.To have a better understanding of the deformation and stress of the catenary shells of revolution,we formulate the principal radii for two kinds of catenary shells of revolution and their displacement type governing equations.Numerical simulations are carried out based on both Reissner-Meissner(R-M)mixed formulations and displacement formulations.Our investigations show that both deformation and stress response of elastic catenary shells of revolution are sensitive to its geometric parameter c,and reveal that the mechanics of the catenary shells of revolution has some advantages over the spherical shell for some loadings.Two complete codes in Maple are provided. 展开更多
关键词 CATENARY Surface of revolution Gauss curvature Minimal surface SHELLS DEFORMATION Stress MAPLE
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