BP model in artificial nerve net model is adopted to predict stuck operating mode in drilling well and artificial nerve net software in predicting system is developed in the paper.
采用人工神经网络模型中BP模型对现场的钻井工况进行卡钻预测，并开发了人工神经网络实时卡钻预测系统软件。
The grey system GM (1, 1) model for predicting gas content in coal seam is established by applying the grey system theory and the prediction model is modified with the residual model.
应用灰色系统理论，建立了预测煤层瓦斯含量的灰色系统GM(1,1)模型，并用残差模型对预测模型进行了修正。
Therefore, the application of grey system gm model to predicting strong earthquake sequences in the region of middle and southern segments of south-north seismic belt is feasible.
因此灰色系统GM模型在南北地震带中南段地区强地震序列预测中的应用是可行的。
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