基于集对分析与三角模糊数耦合的土壤重金属污染评价模型

土壤重金属污染程度综合评价问题是一个前沿的、复杂的不确定性问题。本文尝试利用集对分析方法描述土壤重金属污染评价过程中的确定性和不确定性特征,并应用角模糊数刻画集对差异度系数以改进集对分析方法,进而提出了基于集对分析与三角模糊数耦合的土壤重金属污染综合评价新模型。实例应用结果及与其他方法对比分析表明:该模型评价过程直观、计算简便、结果客观合理,在土壤重金属污染评价中具有参考价值。

A coupling model of set pair analysis and triangular fuzzy numbers for evaluation of soil heavy metal pollution

The comprehensive evaluation on pollution degree of soil heavy metals is a hot issue and complicated uncertain problem. Here a novel model coupling the theory of set pair analysis and the triangular fuzzy numbers was discussed to assess the pollution of soil heavy metal. The certain and uncertain characteristics in the evaluation procedure were described by using set pair analysis method. In order to improve the method of set pair analysis, the triangular fuzzy numbers were introduced to describe the discrepancy degree coefficient of set pair. A practical example was used to test the reliability and the validity of presented analysis model, and it was found that compared with the other methods, this proposed model was more reasonable and reliable, and would be of considerable referential importance in evaluating soil metal pollution.