The unified differential equation of structure vibration and control systems is studied in the paper.

本文研究了结构振动及其控制系统差分方程统一模式的建立问题。

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First of all, the nonlinear equation of structure is presented in this paper based on virtual work principle. It is thought that the Updated Lagrangian Formulation u.

首先，本文基于虚功原理，推导了结构几何非线性方程，指出更新的拉格朗日列士法U。

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The dispersion equation of structure acoustic coupling system for fluid filled pipes surrounded by elastic media under axisymmetric motion was derived from shell dynamic equation.

从壳体基本运动方程出发，导出了弹性介质中的充液管道在轴对称运动下声振耦合系统的频散方程。

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The COIN side of the equation brings the structure to it, brings the enduring piece to it.

WHITEHOUSE: Press Briefing on Afghanistan-Pakistan Annual Review

As Mr Livio explains, Galois's achievement was to show that the structure of these symmetries determines whether the equation has a simple solution.

ECONOMIST: The history of mathematics