南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (4): 601608.doi: 10.13232/j.cnki.jnju.2019.04.010
所属专题: 测试专题
Longbo Zhang1,Zhiyuan Li1,Xibei Yang2(),Yibo Wang3
摘要:
属性约简是粗糙集理论中的核心问题,其目的是剔除冗余属性以找到具有较好泛化能力的属性子集.在决策粗糙集理论中,决策代价经常被作为属性约简的约束条件.但值得注意的是,虽然基于决策代价的约简求解算法可以有效地降低训练样本集上的总决策代价,但其往往忽视了测试样本集上的总决策代价.为解决这一问题,利用交叉验证的基本思想,设计了以决策代价为约束条件的一种新的属性约简求解算法.在八个UCI数据集上的实验结果表明,相较于传统基于决策代价的约简求解算法,所提算法不仅能有效地降低训练集合和测试集合的总决策代价,而且找出的属性子集亦可以带来更好的分类性能.
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