基于最小二乘法的灰色 GM(1,1)改进模型在非煤矿山事故预测中的应用
기우최소이승법적회색 GM(1,1)개진모형재비매광산사고예측중적응용
Inproved gray GM(1,1) model in the non-coal mine accident prediction based on the methed of least square
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