投影寻踪等级评价模型在冰草草坪质量综合评价中的应用

针对以往草坪质量评价方法存在人为权重赋值误差,以及简便计算等方面的不足的问题,提出了草坪坪用质量指标评定的投影寻踪等级评价模型.该方法可以依据标准样本自身的数据特性寻求最佳投影方向,通过最佳投影方向与评价指标的线性投影得到投影指标值,通过这一指标可以对样本进行统一评价和分类,并可利用最佳投影方向判断各评价指标对综合评价目标的贡献大小.排除人为权重干扰,对哈尔滨地区引种的冰草(A gropyron elongatum)坪用质量进行了综合判定.

The Application of Projection Pursuit Grade Evaluation Model in Evaluating Turf Quality of Agropyron Elongatum

Projection pursuit grade evaluation model based on genetic algorithm, was used to avoid jamming of weight matrix and simplify the mathematic calculation in the other method of comprehensive evaluation system of turf quality. Projection pursuit can be used to project high dimensional data to low dimensional space and find the optimum projection vector of data in one-dimensional space, which is helpful to comprehensively evaluate the value and direction of every index in comprehensive evaluation. The projection index value was given by multiplying projection vector by grading standardization value of evaluation indices, which can synthesize the characteristics of turf samples. The method removed jamming of weight matrix, and was used to comprehensively evaluate the turf quality grade criterion of Agropyron Gaerm in Haerbin.