Gravity gradient is the second order derivative of gravitational potential, which can be observed by satellite gradiometer.

摘力梯度为力位二阶导数，可以通过星载梯度仪进行观测。

In this chapter, we partially solve the problem of inner radius of univalence for some parallelogram, applying the properties of extremal sets of Schwarz derivatives.

在这一章我们利用Schwarz 导数极值集性质部分解决了几类平行四边单叶性内径。

The large deflection problem of cantilever beams was studied by means of the biparametric perturbation method and the first order derivative substitution from pseudolinear analysis approach.

利用拟线性分析方法一阶导数代换对基本方程进行了简化处理,将基本微分积分方程转化为非线性代数方程组,并结合双参数摄动研究了悬臂梁大挠度问题。