本文首先在有限概率空间中，运用经典的最值定理得到了勒让得变换；
We first consider the classical case where the underlying probability space is finite.
基于随机安装偏差模式，利用空间有限单元法和概率方法，分析了网架结构由于安装偏差引起的初始应力和初始位移。
Based on the assumption of random installation deviation, the finite element met hod analyzing the initial displacement and stress of grid structures was set up.
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