SP AA gun system efficiency assessment was based on grey correlative projection method. The assessment model was established by making use of scheme volume, index volume, property matrix.

基于灰色关联投影法的自行高炮武器系统效能评估，利用方案集、指标集、属性矩阵等初始条件。

youdao

The Retail Sales Index showed the volume of sales also grew by 0.9% in the quarter and by 1.1% over the year.

BBC: 'Tentative recovery' in Scottish retail sales

These data are available through a site called Google Trends, which allows anyone who cares to do so to download an index of the aggregate volume of searches for particular terms or categories.

ECONOMIST: Internet search data may be useful for forecasters

Every three years, when the BIS releases its new foreign-exchange market survey, the WSJ Dollar Index will be reweighted using the bank's latest trading volume figures, making it a dynamic index that evolves with the constantly changing market.

WSJ: WSJ, FX Trader Launch Dollar Index