利用这些敏度公式就可以构造出有效的序列二次规划算法来求解涉及重特征值的最优结构设计问题。
Truncating the characteristic equation up to the different order, we have obtained the first order and the second order sensitivity expressions both for the single and multimodal eigenvalues.
本文对超声检测中常遇到的变采样问题进行讨论，比较了两种实现方法：基于特征值的二次采样和滤波器组，并给出了二次采样算法。
In the paper, we discuss the variable sampling in ultrasonic testing, and compare two techniques, i. e., the resampling arithmetic and the filter group.
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