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Ghassan Sulaiman,Mohammad K. Younes,Ghassan A. Al-Dulaimi 대한환경공학회 2018 Environmental Engineering Research Vol.23 No.1
Air quality and pollution have recently become a major concern; vehicle emissions significantly pollute the air, especially in large and crowded cities. There are various factors that affect vehicle emissions; this research aims to find the most influential factors affecting CO₂ and NOx emissions using Adaptive Neural Fuzzy Inference System (ANFIS) as well as a systematic approach. The modified ANFIS (MANFIS) was developed to enhance modelling and Root Mean Square Error was used to evaluate the model performance. The results show that percentages of CO₂ from trucks represent the best input combination to model. While for NOx modelling, the best pair combination is the vehicle delay and percentage of heavy trucks. However, the final MANFIS structure involves two inputs, three membership functions and nine rules. For CO₂ modelling the triangular membership function is the best, while for NOx the membership function is two-sided Gaussian.