基于熵权的TOPSIS法及其在水环境质量综合评价中的应用

为了克服TOPSIS法中向量归一化出现的依赖于评价单位以及负理想解选取没有考虑到与理想解之间距离的相对重要性现象,提出了基于熵权的TOPSIS法。在新的评价方法中,采用比例归一化方法并通过引进熵权和虚拟最劣解,解决了上述问题。并将该方法应用于长江望江楼站点,对其近8年的水质状况作出了综合评价。最后,将新方法的评价结果与传统TOPSIS法的评价结果进行了比较,结果表明,新方法的评价更为合理。

COMPREHENSIVE ASSESSMENT OF WATER ENVIRONMENT QUALITY BY TOPSIS METHOD BASED ON ENTROPY WEIGHT

To solve the phenomena of vector normalization in the TOPSIS method depending on the evaluation unit and the phenomena of the negative-ideal solution in the TOPSIS method without considering the relative importance of these distances, it was put forward a new TOPSIS method based on entropy weight.In the new assessment method,we adopt proportion normalization and introduce entropy weight into the assessment method and the dummy negative-ideal solution to solve the said problem.Then,we make it use at the Wangjianglou in Changjiang River,and assess the quality of the water environment in the latest eight years.Finally,the result of the new method is more reasonable than the traditional TOPSIS method by making a comparison between the two results.