使用元启发算法优化SVR和CatBoost模型,以评估山体滑坡易感性
Rajendran Shobha Ajin1, Samuele Segoni2, Riccardo Fanti2
1Department of Earth Sciences (DST), University of Florence (UNIFI), 50121, Florence, Italy. rajendranshobha.ajin@unifi.it.
Scientific reports
|October 22, 2024
概括
这项研究使用机器学习回归算法优化了灰色狼和粒子群算法来增强滑坡易感性映射. 优化的CatBoost模型,特别是GWO,在预测容易发生山体滑坡的地区方面表现出卓越的性能.
科学领域:
- 地质科学和环境科学 地球科学和环境科学
- 人工智能在地理空间分析中的应用
- 机器学习用于自然危险评估.
背景情况:
- 滑坡带来了重大风险,需要准确的易感性评估.
- 机器学习回归算法 (MLRA) 为模拟复杂的环境现象提供了先进的工具.
- 优化算法可能会提高MLRA在地质科学应用中的预测能力.
研究的目的:
- 评估印度喀拉拉邦的山体滑坡易感性,使用MLRA和优化算法的组合.
- 通过灰狼优化器 (GWO) 和粒子群优化 (PSO) 评估支持向量回归 (SVR) 和分类提升 (CatBoost) 的性能提升.
- 为了比较不同MLRA和优化算法组合的有效性,以绘制山体滑坡易感性的地图.
主要方法:
- 开发了六种易感性模型:SVR,CatBoost,SVR-PSO,CatBoost-PSO,SVR-GWO和CatBoost-GWO. 这些模型包括:
- 利用了从18个初始组中选择的14个倾向因素.
- 采用独立数据集和接受器运行特征曲线 (AUC) 下面面积指标验证的模型.
主要成果:
- CatBoost-GWO获得了最高的AUC (0.910),紧随其后的是CatBoost-PSO (0.909) 和CatBoost (0.899).
- 优化模型始终优于其非优化对应模型,GWO在PSO上显示了轻微的优势.
- 与SVR相比,CatBoost表现出优越的性能,无论优化如何.
结论:
- 将机器学习回归算法与优化算法的结合大大提高了山体滑坡易感性评估的准确性.
- CatBoost算法,特别是当它与GWO进行优化时,对于土地滑坡易感性映射非常有效.
- 在早期阶段严格的模型设置至关重要,因为优化增强但不会从根本上改变模型性能.
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