二阶弹性分析 second order elastic analysis 考虑结构二阶变形对内力产生的影响，根据位移后的结构建立平衡条件，按弹性阶段分析结构内力及位移。
本文引用系统主回路分析的新方法—回路增益弹性法对大信号下反馈放大电路的行为特性进行讨论，并通过分析一个二阶反馈放大电路给出一般分析方法和步骤。
In this paper, A new method of system main loop analysis is quoted to analyse the behaviour characteristic of feedback amplifier with large signal, A ordinary analysis method and steps are given.
分析和研究地应力弹性二阶张量场的可视化技术。
The visualization techniques of 3D tensor field in geostress were analyzed and studied.
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