基于可变模糊集理论的城市用地适用性评估

依据可变模糊集理论,构造了城市用地适用性评估的相对差异函数模型和相对隶属函数模型,建立了求解综合相对隶属度的可变模糊评估模型,并应用该模型对2组待开发利用用地适用性进行了评估.研究表明:可变模糊评估是依据对立相对隶属函数来描述模糊概念,通过参数的可变性,自我验证可变模糊评估方法的可靠性,并通过级别特征值表达了评估对象属于某级别的程度,使评估结果更为精细,从而为城市用地适用性评估提供了一种有效的新方法.

Suitability Evaluation of Urban land Based on Variable Fuzzy Sets Theory

Based on variable fuzzy sets theory,the models of relative difference function and relative membership function for urban land suitability evaluation are constructed,and a variable fuzzy evaluation model for synthetic relative membership grade is presented.The suitability of 2-groups urban land is evaluated based on these models.This paper showed that variable fuzzy evaluation method is applied to describe fuzzy concept by opposite relative membership function,and reliability of fuzzy variable evaluation method is also verified itself through variability of parameter.The degree of appraisal object belonging to some grade is showed by grade characteristic number,and the evaluation results are more precision,so a new useful method for urban land suitability evaluation is given.