基于随机森林算法的青藏高原东北边坡输电线路覆冰厚度预报模型
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吕玫霞, 闫昕旸, 何金梅, 程鹏, 王小勇, 李晓琴
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Wire icing thickness prediction model of transmission line in the northeastern slope region of Qinghai-Xizang Plateau based on random forest algorithm
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LYU Meixia, YAN Xinyang, HE Jinmei, CHENG Peng, WANG Xiaoyong, LI Xiaoqin
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表4 输电线路最大等值覆冰厚度（Y）模型拟合效果评估
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Tab.4 Evaluation of model fitting effect of maximum equivalent ice thickness （Y） for transmission lines
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| 区域 | 样本集 | POD | FAR | MAR | | Y≤10 mm | 10<Y<20 mm | Y≥20 mm | Y≤10 mm | 10<Y<20 mm | Y≥20 mm | Y≤10 mm | 10<Y<20 mm | Y≥20 mm | | Ⅰ区 | 训练集 | 0.794 | 0.545 | / | 0.206 | 0 | / | 0 | 0.455 | / | | 测试集 | 0.783 | 0.600 | / | 0.217 | 0 | / | 0 | 0.400 | / | | Ⅱ区 | 训练集 | 0.858 | 0.136 | / | 0.133 | 0.319 | / | 0.012 | 0.854 | / | | 测试集 | 0.834 | 0.098 | / | 0.158 | 0.350 | / | 0.012 | 0.896 | / | | Ⅲ区 | 训练集 | 0.859 | 0.913 | 0.883 | 0.141 | 0 | 0.117 | 0 | 0.087 | 0 | | 测试集 | 0.775 | 0.810 | 0.797 | 0.184 | 0.021 | 0.203 | 0.061 | 0.175 | 0 | | Ⅳ区 | 训练集 | 0.946 | 0.791 | / | 0.001 | 0.207 | / | 0.054 | 0.003 | / | | 测试集 | 0.896 | 0.611 | / | 0.019 | 0.347 | / | 0.088 | 0.096 | / | | Ⅴ区 | 训练集 | 0.980 | 0.818 | / | 0.015 | 0.053 | / | 0.005 | 0.143 | / | | 测试集 | 0.981 | 0.667 | / | 0.019 | 0 | / | 0 | 0.333 | / |
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