投影寻踪模型用于水质等级评价的研究

投影寻踪模型具有可处理高维、非正态数据分类问题的优点,适合于在水质等级评价中应用。该文在介绍该模型基本计算步骤的基础上,经建模分析,得出：各评价等级取值范围内样本个数不小于20即可具有较好的稳定性,投影向量分量的取值范围为0,1]时更有利于提高计算速度,选用加速遗传算法寻优时间更短,使用图解法或直接比较法更为方便和快捷。这些探索能为该模型在今后的实际应用提供有益参考。

Study on Projection Pursuit Model Applied in Water Quality Assessment

Projection pursuit model(PP),being good at dealing with high dimension and non-normal data,was suitable for water quality assessment.This paper built water quality assessment model based on some basic introduction to PP.It made several conclusions as follows: PP model was stable when sample size was no less than 20.It run much faster when the range of projection vector was constrained between 0 and 1.Accelerated genetic algorithm should be recommended because of its unique advantages.Using scatter diagram o...