基于模糊粗糙集的设计实例库维护方法及应用

实例库维护是基于实例的推理方法中的一项核心工作,目前国内外关于实例库维护方法的研究还存在一些不足.针对机械产品设计实例的特点,提出一种基于模糊粗糙集理论的实例库维护方法.首先定义了产品设计实例特征权重计算、实例库族集的划分以及实例属性的约简方法;在此基础上,引入覆盖度和可触及方法对典型实例进行筛简.最后开发了面向工程机械设计的实例库维护系统,并给出了具体应用效果.

Case Base Maintenance Based on Fuzzy Rough Sets Theory for Product Design and its Application

The case base maintenance is the core of case-based reasoning(CBR).There are still some shortages in current related researches.In this paper,for mechanical product design,a case base maintenance method based on fuzzy-rough set is put forward.Firstly,the case feature weight calculation,case base family partition,case feature reduction of product design cases are discussed.Secondly,the concepts of coverage and reach-ability are introduced to filter typical cases in the case base.Finally,a case base maintenance system for construction machines is developed,and an example is given to show the system’s effect.