This study introduces a seasonal modeling approach in the prediction of daily average PM10 (particulate matter with anaerodynamic diameter <10 μm) levels 1 day ahead based on multilayer perceptron artificial neural network (MLP-ANN)forecasters. The data set covered all daily based meteorological parameters and PM10 concentrations in the period of 2007–2014. Seasonal ANN models for winter and summer periods were separately developed and trained by using a lagged time seriesdata set. The most significant lagged terms of the variables within a 1-week period were determined by principal componentanalysis (PCA) and assigned as input vectors of ANN models. Cascading training with error back-propagation method wasapplied in model building. The use of seasonal ANN models with PCA-based inputs showed an increased prediction performancecompared with nonseasonal models. For seasonal ANN models, the overall model agreement in training between modeled andobserved values varied in the range of 0.78–0.83 and R2 values ranged in 0.681–0.727, which outperformed nonseasonal models.The best testing R2 values of seasonal models for winter and summer periods ranged in 0.709–0.727 with lower testing error, andthe models did not show a tendency towards overpredicting or underpredicting the PM10 levels. The approach demonstrated inthe study appeared to be promising for predicting short-term levels of pollutants through the data sets with high irregularities andcould have significant applicability in the case of large number of considered inputs.
การแปล กรุณารอสักครู่..