The main characters are subject - oriented, integrated, time - variant and nonvolatile.

数据仓库的主要特点是面向主题性 、 集成性 、 时变性、非易失性.

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An improved three phase, nonlinear, time variant arc furnace model is presented.

建立了电弧炉改进的三相非线性时变电弧阻抗模型.

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The time - variant reliability problem is turned into time - invariant reliability problem by fast integration method.

本文使用快速积分法将时变可靠度问题转变为非时变可靠度问题后,再以适应核心取样法(AKI) 估计失败机率.

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