Making use of equivalent principle of second order effect, the load on middle stories is converted into that at top and the approximate formula for the critical load of the system is suggested.
利用二阶效应等效的原则，提出将中间层荷载等效为柱顶荷载的近似折减方法，提出结构稳定承载力的近似公式。
The design principle of the gate equivalent Al is proposed and the way to solve the turning off edge effect is given.
给出了门极等位铝条的设计原则；提出了解决MCT关断时边缘效应的方法。
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