A grey predicting model of GM (1, 1) can be established with the accumulated sequence generated by the oil well decline rate before refracturing according to the theory of grey system.
应用灰色系统理论，由油井重复压裂前的递减产量，生成相应的一阶累加序列，由累加序列建立了灰色预测模型GM (1,1)。
Due to the limitation of the grey system GM (1, 1) model in predicting the principal objective developing mineral resources, this paper puts forward for the improved GM (1, 1) model.
然后针对GM(1,1)预测模型在矿产资源开发总体目标预测应用中的局限性，提出了改进的滑动等维灰数递补预测模型。
In this paper, a new predicting model of single eutrophic index of water quality is developed by grey systems GM (1, 2) modelling.
本文应用灰色GM(1,2)建模方法，提出了水质富营养化单项指标的一种新的预测模型。
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