By using the grey system theory and method, we built a grey prediction model to predict the start and end of an active time period in future.
可用灰色系统理论和方法建立灰色预测模型，预测未来一个活跃时段的起止时间。
A grey prediction model GM (1, 1) using grey system theory was created to predict the traffic conflicts. Its feasibility was tested by some related tests.
本文将灰色系统理论应用于交通冲突数的预测，建立了交通冲突数的GM(1,1)预测模型，并通过相关检验验证了该方法的可行性。
Based on analysis of the characteristics of equipment operation, and according to the vibration intensity, a grey prediction model is established by use of grey system theory.
分析了设备运行状态的特征，运用灰色系统理论对设备状态特征量——振动烈度，建立了灰色预测模型。
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