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本文基于粗糙集(Rough Set)理论,提出了五个串的不可分辨关系(等价关系或相容关系),据此推导出语言的上近似和下近似,并证明了一些基本事实,改变子串的长度, 可得到近似收敛于语言的近似结果.最后举例说明语言L的上近似和下近似.
基于串不可分辨关系的语言上近似和下近似——Rough Set的应用
【摘 要】
：
本文基于粗糙集(Rough Set)理论,提出了五个串的不可分辨关系(等价关系或相容关系),据此推导出语言的上近似和下近似,并证明了一些基本事实,改变子串的长度, 可得到近似收敛
【机 构】
：
山西大学成人教育学院,山西,太原,030006山西大学数学系,山西,太原,030006;
【出 处】
：
系统工程理论与实践
【发表日期】
：
2002年1期
【基金项目】
：
山西省青年科研项目;
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