Base on of the basic theory of stability analyses, Finite element model building and the elements selection are analysed.

基于拱桥稳定性分析的基础理论，给出拱桥有限元建模的单元选取及建模方法。

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The theory of stability of differential equations is used to analyse the 'effect of reversal slope of pitch moment to the stability of aircraft.

本文用微分方程定性理论来分析俯仰力矩曲线随迎角变化的“勺形”对飞机飞行稳定性的影响。

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Based on the theory of stability, a numerical analysis method of the membrane wrinkle is established, and the results are certified by experiments.

基于稳定性理论建立了薄膜褶皱的数值分析方法，通过实验的方法对分析结果进行了验证。

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In theory, a discretionary central bank could limit the quantity of money and achieve long-run price stability by controlling the growth of nominal final demand.

FORBES: The Federal Reserve's Flawed Approach To Monetary Policy

"If you have a moment of instability, what happens is the muscles counteract by working to create stability -- in theory, " he said.

CNN: Shoes' toning claims draw experts' doubts

Sanctions exist, in theory, in the stability and growth pact, which requires euro-area countries to keep deficits below 3% of GDP and government debt below 60% of GDP, but they have never been imposed.

ECONOMIST: Charlemagne