基于融合权重-云模型的地下水水质评价方法研究

Study on Water Quality Evaluation Method Based on Combination Weight-Normal Cloud Model

鉴于地下水水质评价中各指标的不确定性和模糊性,将融合权重与云模型相结合,应用于地下水水质综合评价中,建立了基于融合权重-云综合模型。引用融合权重所反映数据本身的效用值来计算指标的权重系数,有效地避免了权重分配困难的问题。该模型以一种新的方法进行地下水水质综合评价,并应用于工程实例,通过与模糊物元法和投影寻踪法的比较,进一步验证了该模型的合理、简便和实用性。

In view of the uncertainty and ambiguity of groundwater quality evaluation indexes,the combination weight and normal cloud model are combined to establish water quality evaluation combination weight-normal cloud model which is applied in the comprehensive evaluation of groundwater quality.The indicator weight is calculated by using the utility value of data itself which is reflected through combination weight method,that can effectively avoid the difficult of weight allocation.The example calculation results of combination weight-normal cloud model are compared with the results of fuzzy matter element method and projection pursuit method.The comparison verifies that the model is rational,simple and practical.