不确定性数学分析方法在河流水质评价中的应用

对几种常用不确定性数学分析方法在河流水质评价中的应用结合实例从各自适用范围、数学模型建立、权重确定方式、评价结果可信度等方面进行分析、对比。物元分析法能解决水质评价中的不相容问题并能刻画水质动态转化趋势,优于模糊综合评价法和灰关联法。针对模糊综合评价法在运用最大隶属度原则得出评价结果时所存在的问题提出改进的加权平均法。

Application of uncertainty mathematic analysis methods in river water quality assessment

The application of some uncertainty mathematic analysis methods in river water quality assessment including the fuzzy comprehensive evaluation method,the grey association method and the matter element analysis method is analyzed and compared in terms of the application scope, mathematic model, weight determination,and creditability of the assessment result.An application example is also given. The incompatible problem in the river water quality assessment and the dynamic changing trend of the river water quality can be analyzed by the matter element analysis method,so it is considered that the matter element analysis method is better than the fuzzy comprehensive evaluation method and the grey association method. In order to solve the problem in the application of the fuzzy comprehensive evaluation method in which the maximal subordinate degree principle is used to get the assessment result,the improved weighted average method is put forward.