对于多元函数来说,若其一阶偏导数仍是关于每个自变量的函数,并且一阶偏导数对每个自变量的偏导数也存在,则说这个多元函数具有二阶偏导数。以此类推,有三阶偏导数,四阶偏导数等,我们把一阶以上的偏导数称为高阶偏导数。
... higher derivative method 高阶导数法 Function s higher-order derivative 函数的高阶导数 partial derivative of higher order 高阶偏导数 ...
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... 一阶偏导数(first-order partial derivative) 高阶偏导数(high-order partial derivatives) 连续可微函数(continuously differentiable functions) ...
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... Partial derivative偏导数 Higher partial derivative高阶偏导数 Total differential and its applications全微分及其应用 ...
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第三部分讨论最高阶偏导数项具有时滞的变分不等式的最优控制问题。
Finally in the third part, we study the optimal control problems for the variational inequality with delays in the highest order spatial derivatives.
通过在积分换元、微分方程求解、多(一)元复合函数求全微分、偏导数及高阶偏导数中的应用举例,论述了一阶微分的形式不变性在微积分学中的作用不应被忽略。
Based on the theory of differential geometry and geodesy, the second order differential equation and the first differential relationship are derived on the regional earth ellipsoid in this paper.
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