一种基于非完备决策表的核特征计算方法
A Computational Method for Core Features in Incomplete Decision Tables
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摘要: 本文基于相容关系构造了非完备决策表的可辨别矩阵,并设计了非完备决策表的核特征快速计算方法.由于算法仅利用核特征在可辨别矩阵中的性质,而并不存储矩阵元素,使算法的空间复杂度得到显著降低,算法的时间复杂度和空间复杂度分别为O (|C||U|2)和O (|U|).Abstract: This Paper discernibility matrix based on tolerance is constructed in incomplete decision table; quick computational method for Core feature is designed. The proposed algorithm only uses the property of core features in discernibility matrix, and does not store the matrix elements; the space complexity of the proposed algorithm is significantly reduced, the time complexity and space complexity of the algorithm is O(|C||U|2) and O(|U|), respectively.