用边界元法分析弹性滚柱与刚性平面的接触问题，需要采用迭代算法。

An iterative process has to be carried out in the boundary element analysis of the contact between elastic roller and rigid plane.

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该分子具有大的TPA截面是起源于该分子的刚性平面共轭结构所固有的线性吸收特性和TPA共振增强；

The large TPA cross section may result from the intensive linear absorbance of the molecule due to its conjugate rigid plane structure, and the two-photon resonance excitation condition.

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本文应用弹性理论，对圆轴扭转时“刚性平面假设”进行了论证，为“刚性平面假设”提供理论依据和深化概念。

"Hypothes of rigid plane", as round shaft distorts, is expounded and proved by use of the elastic theory, thus providing the hypothesis with a theoretical basis and deepened concepts.

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