Based on the model of gray system theory, we forecasted the air cargo traffic at Pearl River Delta and analyzed the long-time influence factors.

本文研究了基于灰色系统理论模型对珠三角地区航空货邮运量进行短期运量预测和长期影响因素分析。

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The Grey System Theory has been applied in the geological environment zoning and evaluation of the Pearl River Delta region, and the relevant mathematical model has been built up.

本文将灰色系统理论引用于珠江三角洲地质环境质量分区评价，建立了灰色系统数学模型。

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Grey system theory has been firstly applied to the zoning evaluation on regional stability of the Pearl River Delta, and a mathematical model of grey system has been established in this paper.

将灰色聚类理论应用于珠江三角洲区域稳定性分区评价，建立了灰色系统数学模型。

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