研究了特征值反问题求解的几种神经网络模型：直接逆模型，间接逆模型，优化方法模型，指出了各种方法的应用范围。
In this paper, several artificial neural network based models of solving inverse eigenvalue problem and their characters are studied. These models are direct, indirect and optimization inverse models.
这就形成了振动的逆问题或反问题。
It is created the inverse problem of vibration or the back-problem of vibration.
研究了基于有限元分析的结构静力反问题求解的逆摄动方法。
Although static analysis is widely used in the mechanical and engineering structure design now, static analysis inverse problems of structure are studied little.
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