Effect of Seismic Permanent Deformation on Safety and Stability of Earth-Rock Dam Slope

In order to study the effect of seismic permanent deformation on the safety and stability of earth-rock dam, the permanent deformation is considered as the non-design permanent load, and the stress-strain hysteresis curve is also considered when the earth is under cyclic load. The research work can make the calculation results of plastic collapse more accurate by including the effect of the post-earthquake degree of plastic deformation on the stability of the earth-rock dam, and the dam safety factor decreases from 2.50 to 1.90 after the magnitude-8 earthquake. Moreover, the research work will also improve the design of the earth-rock dam under abnormal operating conditions.     

初中体育教学中如何合理运用体育游戏

随着我国教育事业的不断发展进步,人们在重视知识教育的同时也不断重视对学生的身体素质培养,而体育教学是良好的锻炼途径。体育游戏作为体育教学中的教学工具,其对于体育教学具有重要意义。该文对初中体育教学中体育游戏合理运用的重要性进行了分析,并在此基础上提出了在体育教学导入、技能、结束环节,如何合理运用体育游戏的相关策略以供参考。     

勾股定理的逆定理的教学价值

数学思想方法是数学的灵魂,而数学知识是数学思想方法的载体与体现。数学教学中应深入挖掘教材,在传授数学知识的同时,充分展示其内在价值,使之切实起到载体作用。本文拟对初二几何第三章最后一节“勾股定理的逆定理”的教学价值作一探讨分析,     

二次根式解题中的辨误教学

二次根式是初中阶段关于“式”的最后一个内容,它的解题具有式的综合性解题特征,用到了数与式的所有知识点,故学生掌握上有较大难度,常会由于计算出错、推理无据、讨论遗漏、解方程知识干扰等产生各种各样的错误。