灰色聚类法在水质评价中的应用

Application of Grey Clustering Methods in Water Quality Evaluation

灰色聚类综合评价方法能否成功应用主要取决于白化权函数的选取与指标权重的确定。目前灰色聚类评估确定主要分为指标变权聚类和指标定权聚类,两种方法在水质评价、空气质量评价、环境评价等各方面取得了一定的应用效果。目前对于权重的选取基本采用的是静态权重,对于随时间变化的监测序列,这样的权重选择有其不当之处,因此本文主要针对权重问题,采用投影寻踪方法计算得到静态权重,在此基础上得到基于均值的变异程度的动态权重,并将其应用于高邮湖水质评价之中。实例表明,该方法的评判结果更符合当地的水质实际情况。

The successful application of grey clustering comprehensive evaluation method depends mainly on select of whiten function and determine the index weight. Currently grey clustering assessment to identify key indicators of change right into weights definition clustering and clustering indexes, both methods have achieved some results in all aspects of the application of water quality assessment, air quality assessment, and environmental evaluation. At present, for the weight of the selected basic uses static weights for changes over time to monitor the sequence, so that the weight of choice has its impropriety, this article focused on the weight problem, using projection pursuit method calculated the static weight on the basis of based on the obtained degree of variation in the mean dynamic right weight, and apply it into Gaoyou Lake water quality assessment. Examples show that the method evaluation results more in line with the actual situation of local water quality.