CAJ | 학술논문

　　本文针对不完备食品信息系统提出了一种基于粗糙集理论的评价属性相对约简方法。本文利用粗糙集等价关系的扩展，即容差关系为基础提出容差关系相似矩阵的概念。然后通过引入广义决策函数的限制来解决不完备信息系统约简的不一致性问题，通过容差关系相似矩阵求不完备信息系统的核属性，再利用属性在容差关系相似矩阵中出现的频率给出了属性重要度的计算公式，利用属性重要度为约简的启发式规则，并运用折半启发式算法减少扩展次数，提高约简速度。实验表明该方法是简单有效的。
　　본문침대불완비식품신식계통제출료일충기우조조집이론적평개속성상대약간방법。본문이용조조집등개관계적확전，즉용차관계위기출제출용차관계상사구진적개념。연후통과인입엄의결책함수적한제래해결불완비신식계통약간적불일치성문제，통과용차관계상사구진구불완비신식계통적핵속성，재이용속성재용차관계상사구진중출현적빈솔급출료속성중요도적계산공식，이용속성중요도위약간적계발식규칙，병운용절반계발식산법감소확전차수，제고약간속도。실험표명해방법시간단유효적。
For incomplete food safety information system, this paper proposes a direct method of attribute relative reduction based on rough set theory. This reduction method gives the concept of tolerance relationship similar matrix via using an extension of equivalence relationship of rough set theory, which is called tolerance relationship. It solves the problem of inconsistency in the incomplete information system through the introduction of restrictions of the generalized decision function. It calculates the core attributes of incomplete information systems via the tolerance relationship similar matrix. It applies attribute significance, which this paper puts forward based on attribute frequency in the tolerance relationship similar matrix, as the heuristic konwledge. It makes use of binsearch heuristic algorithm to calculate the candidate attribute expansion so that it can reduce the expansion times to speed up reduction. Experiment results show that this method is simple and effective.