用密切值法进行海域有机污染物优先排序和风险分类研究

Application of osculating method for the prior order and risk classification for the marine organic pollutants

将密切值法应用于大连湾海域有机污染物优先排序和风险分类研究是一种新的尝试 ,首先将大连湾海域有机污染物各评价指标 (污染物的毒性、在环境中的暴露情况和在水环境中的迁移转化 )的极端情况组成最优和最劣样本 ,再求可综合反映与最优和最劣样本距离两者水平的参数—密切值 ,并根据各污染物最优 (劣 )密切值的大小进行排序 ,根据最优 (劣 )密切值的突变来进行分类分析。实例计算结果表明 ,密切值法用于海域有机污染物优先排序和风险分类切实可行 ,而且不需要确定隶属函数、白化函数等主观参量或函数 ,评价结果更客观和可靠。

Osculating method was an optimization approach for multi-objective decision, as a trial, application of osculating method for the assessment of the prior order and risk classification for the marine organic pollutants in Dalian Sea water was made. Characteristic parameters expressing expositions,toxicity, and chemical properties were used in this paper. The best and worst samples were composed of the maximum and minimum values of assessment parameters. A comprehensive parameter taking the distances between the assessed samples and the best or worst samples into consideration simultaneously was introduced and used to analyze the prior order and risk classification of the marine organic pollutants. The study shown that the osculating method presented more reliable results with clear conception and calculation process, and the osculating method was thus suitable for the study of the prior order and risk classification of the marine organic pollutants.