基于白化权灰色定权聚类的节水灌溉方案评价研究

Research on Evaluation of Water-saving Irrigation Scheme Based on Whitening Grey Fixed Weight Cluster

节水灌溉方案不仅和自身技术特点有关,还受自然环境、社会经济、运行管理等因素制约,在工程设计中对节水灌溉方案的选择是一个复杂的多目标决策过程。针对节水灌溉方案评价指标信息存在模糊性以及指标要素内部和各评价指标之间内在联系和相互影响,提出了基于白化权灰色定权聚类的节水灌溉方案评价方法。该方法采用灰色定权聚类方法,以指标信息的平均值与标准差聚类的白化权函数的转折点确定,利用信息群灰关联度模型解决方案评价过程中的指标信息之间存在的相关性并获得指标权重,应用灌溉方案的灰度值进行方案的优选和评价。应用该模型对某节水灌溉工程方案进行优选,结果表明,该方法符合实际,评价结果可信,为节水灌溉方案的评价优选提供了一个新方法。

Water-saving irrigation project scheme is related not only to its own technical characteristics,but also to natural environment,social economy,operation and management.The selection of water-saving irrigation scheme in engineering design is a complicated multi-objective decision-making problem.Aiming at the fuzziness of evaluation index information of water-saving irrigation scheme and the connection and influence between index elements and each evaluation index,an evaluation method of water-saving irrigation project scheme based on grey fixed weight clustering with whitening weight was put forward.In this method,grey fixed weight clustering method was used to determine the turning point of the white weight function of clustering by mean value and standard deviation of index information,and the grey correlation model of information group was used to solve the correlation problem between index information in the evaluation process and obtain index weight.Finally,the gray value of irrigation scheme was used to optimize the scheme.Then this model was used to optimize a water-saving irrigation project.The results showed that the method had clear ideas and reliable evaluation results,which provided a scientific basis for the evaluation and optimization of water-saving irrigation project schemes.