differential coefficient equation group 微分方程组 differential difference equation 差分微分方程 Differential Algebraic Equation 微分代数方程组 ; 微分一代数方程组 ; 微分 ..
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nonlinear differential-difference equation [数] 非线性微分差分方程
simultaneous differential-difference equation [数] 联立微分差分方程
linear differential-difference equation 线性差分微分方程
differential-difference equation 微分
difference differential equation [数] 差分微分方程
differential difference equation dde 微分差分方程
partial differential difference equation 偏微分差分方程
But this partial differential equation can not be directly integral, so usually use Navier method, Rayleigh Ritz method and finite difference method and other methods.
但这一偏微分方程不能直接积分，所以通常用纳维法、瑞利-里兹法、有限差分方法等方法求解。
The mixed partial differential terms of time variables and space variables in the pseudo-parabolic equation make the discussion of the difference scheme more difficult.
伪抛物型方程中关于时间与空间变量的混合偏导项给差分格式的讨论带来了一定难度。
By deriving balanced differential equation of buried pipeline, adopt finite difference method to analyze and calculate the effect of axial build-in force on pipeline transversely displacement.
推导出埋地管道的平衡微分方程，采用有限差分法分析并计算了轴向嵌固力对管道横向位移的影响。
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