基于天气数据对空气质量预测的改进KNN算法

Improved KNN Algorithm for Air Quality Prediction Based on Weather Data

基于天气数据进行空气质量预测,首先收集成都市A区2018年4月1日到2018年6月3日64天24个天气属性,然后对天气属性进行筛选、数据处理;接着,建立KNN分类模型,利用k折交叉验证和多数表决原则对64个样本进行分类;最后在传统KNN分类模型的基础上,使用反距离加权建模,结果表明模型有较好的泛化能力和预测效果。

This paper forecasts air quality based on weather data.24 weather attributes from April 1,2018 to June 3,2018 are collected from April 1,2018 to June 3,2018.Then,the KNN classification model is established,and 64 samples are classified by k fold cross verification and majority voting principle.Finally,on the basis of the traditional KNN classification model,the model is established by inverse distance weighting,and the results show that the model has good generalization ability and prediction effect.