南京大学学报(自然科学版) ›› 2020, Vol. 56 ›› Issue (1): 7484.doi: 10.13232/j.cnki.jnju.2020.01.009
摘要:
条件偏好网(Conditional Preference networks,CP?nets)是描述属性间条件偏好的图模型,多值无环CP?nets学习是重要的研究方向之一.区别于传统的CP?nets学习方法,提出基于贝叶斯方法和遗传算法的多值无环CP?nets学习.在偏好处理上以多值属性的完整偏序关系作为条件偏好,进行相关性关系判定.随后,基于贝叶斯方法,以单一父属性推出多父属性下的相关性关系,进行CP?nets结构学习.采用遗传算法在CP?nets结构搜索空间中进行搜索,求解最优结构.通过Delink算法进行去环,完成无环CP?nets学习.在寿司数据集上验证算法的有效性,实验结果表明,基于贝叶斯?遗传算法的CP?nets学习算法能够在有限时间内学习得到局部最优无环CP?nets.
中图分类号:
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