通过集体学习结合精细的空间竞争,适应中国的最大冠宽高度
Zeyu Cui1,2, Huaiqing Zhang1,2, Yang Liu1,2
1Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing, 100091, China.
Plant phenomics (Washington, D.C.)
|December 19, 2025
概括
这项研究引入了一种新方法,可以使用空间关系和机器学习在密集森林中准确测量树木高度和树冠宽度 (HMCW). 开发的包装模型显著提高了HMCW预测的准确性,有助于森林管理.
科学领域:
- 林业科学 林业科学
- 遥感 遥感 遥感 遥感
- 机器学习应用 机器学习应用
背景情况:
- 准确的森林空间竞争和3D结构表型数据对于理解树木与环境的相互作用至关重要.
- 由于冠状封闭,现有的LiDAR方法在密集森林中面临挑战,阻碍了像最大冠状宽度高度 (HMCW) 这样的参数提取.
研究的目的:
- 开发一种基于树冠空间关系构建森林空间结构单元的新方法.
- 通过整合空间竞争和表型参数来确定最佳的机器学习模型来预测中国树中的HMCW.
- 为在密集森林中提取具有挑战性的树木参数提供强大的方法.
主要方法:
- 基于树冠空间关系的方法被用于构建森林空间结构单元.
- 使用五种集合学习技术,训练了11种机器学习模型组合.
- 包装组合模型,集成XGBoost,随机森林,支持向量回归,梯度增强和,被评估为HMCW预测.
主要成果:
- 构建的空间结构单元有效地解决了错误的邻近树木选择或遗漏的问题.
- 与单个模型相比,Bagging模型在HMCW预测方面表现优异,达到0.8346.2的R2.
- 包装模型显示了精度指标的显著改善 (例如,R2增加1.6%,RMSE减少6.66%) 与最佳单一模型 (随机森林) 相比.
结论:
- 拟议的方法提供了一个可行的解决方案,用于建模HMCW和提取其他难以测量的参数在各种树种具有相似结构.
- 精致的空间结构单元增强了3D结构表型和环境因素之间的联系.
- 这种方法支持了树冠形态模拟和可持续森林管理研究的进展.
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