摘要
量化容差关系是粗集理论中一个最重要的扩展模型,然而它却有自己的局限性:需要诸如不完备信息系统中的属性值的概率分布情况等相关领域的知识。提出了一个基于量化容差关系的粗糙集改进模型,这个新的模型是建立在对不完备信息系统的属性值的统计数据基础上的,它有效地克服了普通量化容差关系的不足。实例分析表明,改进的量化容差关系模型比量化容差关系更符合实际、具有更强的分辨能力。
Valued tolerance relation is an very important extension modle of rough sets.Unfortunately,This extension has its own limitation.It needs knowledge of correlative domain such as the probability distribution situation of the attribute value in the information system.An improved modle of rough set based on valued tolerance relation is presented.This new modle is founded on the statistics of the attribute value in the incomplete information system,so it has overcome the shortcoming of the ordinary valued tolerance relation.By an example,it is verrified that the improved modle of rough set based on valued tolerance relation conforms to the reality more than the previous and have stronger distinction ability.
出处
《科学技术与工程》
2008年第16期4518-4521,4526,共5页
Science Technology and Engineering
