最后以全程制导为例，说明二阶摄动制导理论的应用。
Finally, an example on applying the second order perturbed guidance theory for all-way guidance is given.
结果表明二阶摄动结果对拱桥固有频率的影响可以忽略；
The results show that the effect of second-order perturbation results on the natural frequency of arch bridge can be ignored.
本文基于二阶摄动技术研究叶片强度分析的随机有限元方法。
Based on the second-order perturbation technique, the stochastic finite element method (SFEM) of the strength analysis of the turbine blade is introduced in this paper.
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