arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.04264cs.LG
收藏

HighAir:一种基于分层图神经网络的空气质量预报方法

HighAir: A Hierarchical Graph Neural Network-Based Air Quality Forecasting Method

College of Computer Science and Technology, Zhejiang University(浙江大学计算机科学与技术学院);College of Computer Science, Zhejiang University of Technology(浙江工业大学计算机科学学院);Alibaba Group(阿里巴巴集团)

Ling Chen, Jiahui Xu, Binqing Wu, Mingqi Lv, Chaoqun Zhan, Sanjian Chen, Jian Chang

AI总结:

本文提出HighAir方法,通过分层图神经网络建模城市与监测站间污染物扩散过程,考虑天气和土地利用等复杂因素,提升空气质量预报精度。

摘要:

准确预测空气质量对保护公众免受肺部和心脏疾病至关重要。由于不同污染源和多种影响因素之间的复杂相互作用,这一任务具有挑战性。现有空气质量预报方法无法有效建模城市和监测站之间空气污染物的扩散过程,这可能导致区域空气质量突然恶化。本文提出HighAir,即一种基于分层图神经网络的空气质量预报方法,采用编码器-解码器架构,考虑复杂的空气质量影响因素,如天气和土地利用。具体而言,我们从分层角度构建城市级图和站点级图,分别考虑城市级和站点级模式。我们设计了两种策略,即上层传递和下层更新,以实现不同层级之间的交互,并引入消息传递机制以实现同一层级内的交互。我们根据风向动态调整边权重,以建模动态因素与空气质量之间的相关性。我们在长江三角洲城市群的数据集上将HighAir与最先进的空气质量预报方法进行比较,该数据集涵盖61,500平方公里内的10个主要城市。实验结果表明,HighAir显著优于其他方法。

英文摘要:

Accurately forecasting air quality is critical to protecting general public from lung and heart diseases. This is a challenging task due to the complicated interactions among distinct pollution sources and various other influencing factors. Existing air quality forecasting methods cannot effectively model the diffusion processes of air pollutants between cities and monitoring stations, which may suddenly deteriorate the air quality of a region. In this paper, we propose HighAir, i.e., a hierarchical graph neural network-based air quality forecasting method, which adopts an encoder-decoder architecture and considers complex air quality influencing factors, e.g., weather and land usage. Specifically, we construct a city-level graph and station-level graphs from a hierarchical perspective, which can consider city-level and station-level patterns, respectively. We design two strategies, i.e., upper delivery and lower updating, to implement the inter-level interactions, and introduce message passing mechanism to implement the intra-level interactions. We dynamically adjust edge weights based on wind direction to model the correlations between dynamic factors and air quality. We compare HighAir with the state-of-the-art air quality forecasting methods on the dataset of Yangtze River Delta city group, which covers 10 major cities within 61,500 km2. The experimental results show that HighAir significantly outperforms other methods.

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。

↑