作 者: ;
机构地区: 佛山科学技术学院理学院
出 处: 《计算机应用》 2008年第5期1180-1182,共3页
摘 要: 给出一种简单的代数核判断方法,它将比较两个正区域是否相等简化为比较它们的基数是否相等,从而简化了计算过程,得到一种基于数据库系统求决策表核属性的新算法。由于所有条件属性集已是一个代数协调集,采用自顶而下逐步删除可约属性的策略,提出一种基于数据库系统求代数约简的算法。理论分析和实验结果表明,该方法面对大数据集具有更高的效率。 A simple judgement method of algebraic core for decision table was presented. It simplified the calculation by comparing the cardinality of two positive regions instead of the two regions. A new algorithm based on database system was proposed to explore attribute core. Since conditional attribute set has been an algebraic consistent set, it can guarantee to obtain a reduction by top-bottom strategy to eliminate reducible attributes. Theoretical analysis and experimental results show that they are efficient in large data sets.
领 域: [自动化与计算机技术] [自动化与计算机技术]