That was this symbolic vector operator in which the components are the partial derivative operators.

这个是符号化的向量算子，其中它的分量是偏微分算子。

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This paper deals with a systematical analysis on the common methods for environmental quality assessment and a new method suggested for environmental quality assessment, called Vector-Operator.

在对目前环境质量评价中流行评价方法系统分析的基础上，提出了一种新的环境质量评价方法，矢量算子法。

youdao

This paper deals with a systematical analysis on the common methods for environmental quality assessment and a new method suggested for environmental quality assessment, called Vector-Operator.

在对目前环境质量评价中流行评价方法系统分析的基础上，提出了一种新的环境质量评价方法，矢量算子法。

youdao