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arXiv 1808.05264cs.LGcs.AIstat.ML
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DeepDownscale:一种用于高分辨率天气预报的深度学习策略

DeepDownscale: a Deep Learning Strategy for High-Resolution Weather Forecast

IBM Research(IBM研究院)

Eduardo R. Rodrigues, Igor Oliveira, Renato L. F. Cunha, Marco A. S. Netto

摘要:

运行高分辨率的物理模型在计算上是昂贵的,并且对于许多学科是必不可少的。农业、交通和能源是依赖高分辨率天气模型的行业,这些行业通常需要耗费大量时间的大型高性能计算(HPC)系统才能及时提供结果。许多用户无法运行所需的分辨率,被迫使用低分辨率输出。一个简单的解决方案是插值结果以实现可视化。还可以组合低分辨率模型的集合以获得更好的预测。然而,这些方法未能捕获低分辨率输入中的冗余信息和模式,这可能有助于提高预测质量。在本文中,我们提出并评估了一种基于深度神经网络的策略,以天气预报为实际用例,从低分辨率预测中学习高分辨率表示。我们采用监督学习方法,因为可以自动获得标记数据。我们的研究结果表明,显着的改善时,与标准的做法和策略仍然是轻量级的,足以在适度的计算机系统上运行。

英文摘要:

Running high-resolution physical models is computationally expensive and essential for many disciplines. Agriculture, transportation, and energy are sectors that depend on high-resolution weather models, which typically consume many hours of large High Performance Computing (HPC) systems to deliver timely results. Many users cannot afford to run the desired resolution and are forced to use low resolution output. One simple solution is to interpolate results for visualization. It is also possible to combine an ensemble of low resolution models to obtain a better prediction. However, these approaches fail to capture the redundant information and patterns in the low-resolution input that could help improve the quality of prediction. In this paper, we propose and evaluate a strategy based on a deep neural network to learn a high-resolution representation from low-resolution predictions using weather forecast as a practical use case. We take a supervised learning approach, since obtaining labeled data can be done automatically. Our results show significant improvement when compared with standard practices and the strategy is still lightweight enough to run on modest computer systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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