用置信区间提升太阳耀斑预测可信度,减少误报。
Uncertainty-Aware Solar Flare Regression
- 引入校准预测框架,为耀斑强度预测生成可靠置信区间。
- 校准分位数回归在覆盖率和区间长度上均优于其他方法。
- 适合需要高可靠性预测的太空天气预报研究者使用。
当前太阳耀斑预测缺乏对可靠性的确切量化,导致频繁误报,尤其在极端事件占主导的数据集上更为明显。为提升空间天气预报的可信度,建立模型预测的置信区间至关重要。共形预测是一种机器学习框架,可在不假设数据分布的前提下,为有限样本提供具有有效覆盖概率的预测区间。本文探索了共形预测在空间天气预报回归任务中的应用。具体而言,我们基于磁場圖生成的全日面图像,采用四个预训练深度学习模型,结合三种构建置信区间的策略:共形预测、分位数回归与校准分位数回归。实验表明,校准分位数回归在覆盖率和平均区间长度上均优于其他方法,验证了其在提升太阳天气预报模型可靠性方面的有效性。
原文摘要 · Abstract (English)
Current solar flare predictions often lack precise quantification of their reliability, resulting in frequent false alarms, particularly when dealing with datasets skewed towards extreme events. To improve the trustworthiness of space weather forecasting, it is crucial to establish confidence intervals for model predictions. Conformal prediction, a machine learning framework, presents a promising avenue for this purpose by constructing prediction intervals that ensure valid coverage in finite samples without making assumptions about the underlying data distribution. In this study, we explore the application of conformal prediction to regression tasks in space weather forecasting. Specifically, we implement full-disk solar flare prediction using images created from magnetic field maps and adapt four pre-trained deep learning models to incorporate three distinct methods for constructing confidence intervals: conformal prediction, quantile regression, and conformalized quantile regression. Our experiments demonstrate that conformalized quantile regression achieves higher coverage rates and more favorable average interval lengths compared to alternative methods, underscoring its effectiveness in enhancing the reliability of solar weather forecasting models.
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