Studies have been made on the influences of the second order derivatives of the amplitude and phase of the reflection coefficient on the Gaussian pulse upon reflection from the dielectric mirrors.

研究了介质镜反射系数的振幅与位相二阶导数对飞秒高斯脉冲的影响。

youdao

And, as before, this comes from the fact that the mixed second derivatives are the same, no matter in which order you take them.

和以前一样，它来源于这样一个事实，混合二阶导数，求导次序改变，结果不变。

youdao

The aim of the dissertation is to study second order derivatives based differential equation approaches to nonconvex constrained optimization problems.

本文旨在研究求解非凸约束优化问题的基于二阶导数的微分方程方法。

youdao

And all this is, is saying that when you take a mixed second derivative, it doesn't matter in which order you take the two derivatives.

麦克斯韦关系的本质是,当你考虑混合的二阶导数时，求导的顺序不影响最后的结果,现在，我们利用这些关系。

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