RM-DEMATEL: a new methodology to identify the key factors in P M 2.5

Chen, Yafeng; Liu, Jie; Li, Yunpeng; Sadiq, Rehan; Deng, Yong

RM-DEMATEL: a new methodology to identify the key factors in P M 2.5

2015

Chen, Yafeng | Liu, Jie | Li, Yunpeng | Sadiq, Rehan | Deng, Yong

Weather system is a relative complex dynamic system, the factors of the system are mutually influenced P M₂.₅concentration. In this paper, a new method is proposed to quantify the influence on P M₂.₅by other factors in the weather system and identify the most important factors for P M₂.₅with limited resources. The relation map (RM) is used to figure out the direct relation matrix of 14 factors in P M₂.₅. The decision making trial and evaluation laboratory(DEMATEL) is applied to calculate the causal relationship and extent to a mutual influence of 14 factors in P M₂.₅. According to the ranking results of our proposed method, the most important key factors is sulfur dioxide (SO₂) and nitrogen oxides (NO X). In addition, the other factors, the ambient maximum temperature (Tₘₐₓ), concentration of P M₁₀, and wind direction (W d ᵢ ᵣ), are important factors for P M₂.₅. The proposed method can also be applied to other environment management systems to identify key factors.

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