An iterative process has to be carried out in the boundary element analysis of the contact between elastic roller and rigidplane.
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。
2
"Hypothes of rigidplane", 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.
The large TPA cross section may result from the intensive linear absorbance of the molecule due to its conjugate rigidplane structure, and the two-photon resonance excitation condition.