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案例属性权重的群基数效用优化方法

Keywords: 案例检索,特征属性,权重,群基数效用法,遗传算法

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Abstract:

案例特征属性权重的选取直接影响到案例检索的精度.针对属性权重的优化选择问题,提出一种基于群决策思想的案例属性权重优化方法.首先,利用遗传算法从已有的案例数据库中得出多组初始特征属性权重;然后,借鉴群决策思想中的群基数效用法对多组权重进行优化选择,并在推理过程中进行权重的自适应调整,以此确定合理的特征属性权重.仿真结果表明,该方法应用于案例推理过程能充分挖掘出多组权重的潜在知识,从而得出精度更高的检索结果.

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