计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
17期
108-111
,共4页
模糊等价关系%知识粒度%混合决策系统%属性约简
模糊等價關繫%知識粒度%混閤決策繫統%屬性約簡
모호등개관계%지식립도%혼합결책계통%속성약간
fuzzy equivalence relation%knowledge granulation%hybrid decision system%attribute reduction
现实世界中常常包含着海量的、不完整的、模糊及不精确的数据或对象，使得模糊信息粒化成为近年来研究趋势。利用论域上的模糊等价关系定义了模糊粒度世界的模糊知识粒度，给出了新的属性约简条件和核属性计算方法，以便更好地挖掘出潜在的、有利用价值的信息。针对粗糙集在对连续属性约简的过程中容易造成信息缺失和不能对模糊属性处理的现象，提出了一种基于模糊知识粒度对混合决策系统约简的启发式算法，省去了连续属性离散化过程，减少了计算量，为离散值域和混合值域约简提供了统一的方法。最后通过实例验证了其有效性。
現實世界中常常包含著海量的、不完整的、模糊及不精確的數據或對象，使得模糊信息粒化成為近年來研究趨勢。利用論域上的模糊等價關繫定義瞭模糊粒度世界的模糊知識粒度，給齣瞭新的屬性約簡條件和覈屬性計算方法，以便更好地挖掘齣潛在的、有利用價值的信息。針對粗糙集在對連續屬性約簡的過程中容易造成信息缺失和不能對模糊屬性處理的現象，提齣瞭一種基于模糊知識粒度對混閤決策繫統約簡的啟髮式算法，省去瞭連續屬性離散化過程，減少瞭計算量，為離散值域和混閤值域約簡提供瞭統一的方法。最後通過實例驗證瞭其有效性。
현실세계중상상포함착해량적、불완정적、모호급불정학적수거혹대상，사득모호신식립화성위근년래연구추세。이용론역상적모호등개관계정의료모호립도세계적모호지식립도，급출료신적속성약간조건화핵속성계산방법，이편경호지알굴출잠재적、유이용개치적신식。침대조조집재대련속속성약간적과정중용역조성신식결실화불능대모호속성처리적현상，제출료일충기우모호지식립도대혼합결책계통약간적계발식산법，성거료련속속성리산화과정，감소료계산량，위리산치역화혼합치역약간제공료통일적방법。최후통과실례험증료기유효성。
In the real world there are massive, incomplete, vague, and inaccurate data or objects. As a result fuzzy information granulation has become a research trend in recent years. This paper defines a fuzzy knowledge granulation of fuzzy granular world by making use of fuzzy equivalence relation on the universe of discourse. Then it gives new rules of attribute reduction and a method of computing core attributes in order to preferably dig out some potential and valuable information. Because in a rough set model numerical attribute reduction usually brings information loss and fuzzy attributes are not taken into consider-ation, a heuristic algorithm for the reduction of hybrid decision system based on fuzzy knowledge granulation is proposed to eliminate the discretization process of continuous attributes, reduce the computational complexity and provide a unified approach for normal values and hybrid data. An example shows that the algorithm is effective.
