【Key words】 Rough Set Theory； Attribute Reduction； Information System； Heuristic Reduction；
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Heuristic Reduction Algorithm 启发式约简算法
heuristic reduction algorithms 启发式约简算法
Mixed heuristic reduction algorithm 混合启发式约简
heuristic attribute reduction 启发式属性约简
The novel online heuristic algorithm of representation based on polygonal boundary reduction is presented in detail.
提出了一种新颖的可在线计算的时间序列启发式算法。
A heuristic algorithm based on conditional information entropy for knowledge reduction is proposed, and the complexity of this algorithm is analyzed.
提出了一种基于条件信息熵的知识约简启发式算法，并指出该算法的时间复杂度是多项式的。
The item of attribute frequency in the scan vector was taken as heuristic information to improve the efficiency of attributes reduction.
以扫描向量中的属性频率项作为属性约简搜索的启发信息，提高了属性约简效率。
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