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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An equation for describing the evolution of agricultural machinery products possessions was established and then its nonlinear chaos property with the theory of stability was pointed out.

该文建立了描述农机产品社会拥有量的演化方程，并指出该方程具有非线性混沌特性。

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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.

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

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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