对两栋不同结构体系的高层混凝土建筑进行了推覆分析，详细讨论了二阶效应对结构顶点侧移和基底倾覆力矩的影响。
Through the push over analysis of two tall concrete buildings with different structure types the influence of second order effect on top drift and base overturning moment had been discussed in detail.
最后介绍了在激光干式清洗中与基底表面粒子相关的一些物理问题：光学谐振和近场效应。
Some physical problems, related to the particle on the surface, i. e. optical resonance and near-field effects in dry laser cleaning are also analyzed.
二阶效应增大了结构的顶点位移最大值和层间位移角最大值，减小了结构的基底剪力最大值。
The second order effects enlarge the requirement of top displacement and story drift and diminish that of base shear.
它们在基底膜表面台阶处有小岛的装饰效应。
There is an effect of island decoration near the step of substrate surface.
它们在基底膜表面台阶处有小岛的装饰效应。
There is an effect of island decoration near the step of substrate surface.
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