So, we said when we have a function of two variables, we have the gradient vector.
我们说，当一个二元函数存在时，就有梯度向量。
Magnetic vector potential is regarded as variables to gain solution of excitation magnetic field and armature response magnetic field.
以矢量磁位作为求解变量得到励磁磁场和电枢反应磁场的二维解。
This paper deals with the multivariate vector analysis of quality data by geometric transformation, rotating coordinates and computation of the principal component of initial variables.
本文讨论多元质量数据的矢量分析方法，几何变换，坐标旋转和初始变量的主分量计算不同变量的主分量值。
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