计算机科学 ›› 2022, Vol. 49 ›› Issue (11A): 211200084-5.doi: 10.11896/jsjkx.211200084
钱栋炜, 崔阳光, 魏同权
QIAN Dong-wei, CUI Yang-guang, WEI Tong-quan
摘要: 进入新世纪,伴随着我国经济的高速发展,我国很多地区空气污染情况相对严重,同时政府对于空气污染情况的关注度与治理力度也越来越高。当前对于我国空气质量影响最大的是O3,SO2,NO2,CO,PM10,PM2.5这6种污染物,因而对这6种污染物浓度进行预测预报,及时作出相应管控调整就成为了保障居民健康、建设美丽中国的迫切需求。目前污染物预测的主流方案是WRF-CMAQ预测系统,该系统基于污染物物化反应与气象模拟两部分构成。但因为当前对于如臭氧在内的污染物的生成机理等研究还有待深入,WRF-CMAQ模型的预测存在较大误差。因此采用了深度神经网络对污染物浓度进行二次建模的方式,来减少预测误差。同时,采用联邦学习方法,对于多个监测站使用联邦学习进行数据训练,提升模型泛化能力。实验结果表明,相比于一次WRF-CMAQ的一次预测结果,深度神经网络的方案在均方误差值上最多缩小到了3.93%。同时,采用联邦学习的方案相比于单个监测站点在广泛测试中最多提升了68.89%的性能。
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