This factor has been dubbed "the second derivative", or the rate of change of the rate of change.

这一因素被称为是“二阶导数”，或者是变化率的变化率。

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The effect of different zero crossing wavelengths on determination of mixed colorants in food under the same divisor factor in derivative ratio spectrum were discussed.

探讨比值导数波谱法中相同除数因子下的不同零交点波长对食品混合色素检测的影响。

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The second derivative curve of the gravity field can be used as filtering factor so as to improve resolution.

为了提高分辨率，可采用重力场的二次导数曲线作滤波因子。

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The concept of a derivative product, with a value that depends on at least one risk factor, has been the greatest financial-product innovation of the 20th century.

ECONOMIST: Letters