常微分方程 ODE ; differential equation
偏微分方程 [数] partial differential equation ; PDE
微分方程 [数] differential equation
随机微分方程 [数] stochastic differential equation
全微分方程 exact differential equation ; [数] total differential equation
时滞微分方程 Retarded differential equation
积分微分方程 [数] integro-differential equation
伯努利微分方程 [数] Bernoulli differential equation
椭圆型偏微分方程 [数] elliptic partial differential equation ; partial differential equation of elliptic type
线性代数微分方程 Linear Algebra & Differential Equation
研究一类四阶微分方程解的存在性，利用上下解及单调迭代的方法，得出这类四阶方程的最大解和最小解的存在。
We obtain the existence of extremal solutions of the boundary value problem by using the method of lower and upper solutions coupled with monotone iterative technique.
该方法不用一般的变分原理，可适用任意变系数正定和非正定偏微分方程。利用这一方法得到一个新的八节点四边形平面应力单元。
It doesn't need the variational principle and can be applied to solve non-positive or positive definite partial differential equations with arbitrary variable coefficient.
根据原始图像与噪声的相关信息，应用最小均方误差、信噪比与相关系数最小原则确定微分停止时间。
The stopping time is chosen by minimal mean square error, signal-to-noise ratio and minimal correlation coefficient based on the information of the original (ideal) images and noises.
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