基于非负矩阵分解方法的主要城市环境质量状况分析
Analysis of Environmental Quality of Major Cities Based on Non-Negative Matrix Factorization

根据水环境、大气环境、固体废物、声环境四方面的环境质量建立评价指标体系，利用非负矩阵分解方法对2020年全国31个主要城市的环境质量状况进行聚类分析评价。结果表明在2020年全国31个主要城市的环境质量状况中，环境质量状况在不同城市之间表现有差异，并且聚类结果呈现一定的空间分布特征。研究揭示了城市的环境质量状况与空间分布情况，能为城市生态环境状况发展建设提供参考。
Establish an evaluation index system based on the environmental quality of water environment, atmospheric environment, solid waste, and acoustic environment, and use the non-negative matrix decomposition method to perform cluster analysis and evaluation on the environmental quality of 31 major cities across the country in 2020. The results show that in the environmental quality status of 31 major cities across the country in 2020, the environmental quality status varies between different cities, and the clustering results show certain spatial distribution characteristics. The research reveals the environmental quality and spatial distribution of the city, which can provide a reference for the development and construction of the urban ecological environment.