基于小波变换的铜陵市空气质量指数AQI的分析

Analysis of the Air Quality Index in Tongling on the Basis of Wavelet Transformation

以铜陵市2016年全年366天逐日空气质量指数AQI为研究对象,运用小波变换对其进行分析研究,并在Matlab R2012b中的小波变换工具箱中用Db4小波对其规律进行呈现,结果表明,铜陵市由于受地形及气象因素影响,2016年铜陵市的空气质量总体呈现"冬重夏轻"的模式,小波变换法是研究空气质量指数AQI变化的有效分析方法。

This article focuses on the daily air quality index （AQI） in Tongling city during 366 days in 2016 and analyzes the results on the basis of wavelet transformation,presenting its rules by using Db4 in the wavelet transformation toolbox of Matlab R2012b.The results show that the overall air quality of Tongling city in 2016 has been presented in the pattern of ＂heavy winter and light summer＂due to the influence of topographic and meteorological factors of this city.Wavelet transformation is an effective method to study the air quality index （AQI）.