模糊评价因子的熵权法赋权及其在水质评价中的应用

针对模糊综合评价方法中对多因子赋权时计算繁琐、工作量大、未考虑多个评价对象间联系等缺陷，提出利用熵权法对多评价目标因子赋权的新思路．利用三峡库区城市江段13个监测断面的水质监测数据，比较了利用熵权法与传统的评价因子赋权的差异．结果表明，当涉及多个评价对象时，采用熵权法对各因子赋权，只需1次计算即可，无需对每个监测点进行权重计算，从而使模糊评价过程大大简化，评价的结果客观、合理．

Study and Application on the Entropy method for Determination of Weight of evaluating indicators in Fuzzy Synthetic Evaluation for Water Quality Assessment

Considering the difficulties of calculation using fuzzy synthetic evaluation method and the relationship among evaluators are ignored, a new weight evaluation process using entropy method was established. Aiming at the water quality assessment of the Three Gorges reservoir area, the differences of Entropy method and traditional method was compared in the weight calculation of evaluating indicators by using the fuzzy mathematics. The results showed that when there were one more evaluators, using this method was very convenient for fuzzy synthetic evaluation. Only one calculation was enough and it need not to calculate every monitoring point. This method predigested the fuzzy synthetic evaluation process greatly and the evaluation results were reasonable.