A Dynamic Three-way Decision Model based on the Updating of Attribute Values
A Dynamic Three-way Decision Model based on the Updating of Attribute Values
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DOI：
10.1016/j.knosys.2017.11.026
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
Qinghua Zhang;G. Lv;Yuhong Chen;Guoyin Wang
中科院分区：
文献类型：
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作者：
Qinghua Zhang;G. Lv;Yuhong Chen;Guoyin Wang
三支决策模型是人工智能领域的一个研究热点，许多研究者都关注其可行性和合理性。三支决策模型的容忍度和实用性均优于二支决策模型。当给定域中每个对象的属性值时，域的三向分类的形成是一个关键问题。然而，在给定接受区域中的对象数量的情况下，建立具有给定属性值的三支决策模型的研究很少。因此，本文提出的模型充分考虑了属性值的不确定性和更新成本。本文首先定义属性比的新概念来描述当对象的属性值为数值时的对象，然后建立动态三支决策模型。其次，提出了一种属性值特征提取算法，并根据给定条件得到了动态三支决策模型的一对决策阈值。然后，在更新属性值的情况下，举例说明如何在动态决策过程中得到双向分类结果。最后，仿真实验结果表明，该模型在实际应用中是可行和有效的。当接受区域内的对象数量给定时，根据属性值的更新策略，该模型成功解决了三向决策问题。
The three-way decision model is a topic of substantial research interest in the field of artificial intelligence, and many researchers have focused on to its feasibility and rationality. The tolerance and practicability of the three-way decision model are better than those of the two-way decision model. When the attribute value of each object in a domain is given, the formation of a three-way classification of the domain is a key issue. However, few studies have been conducted on establishing a three-way decision model with the given attribute values in the case where the number of objects in an accepted region is given. Therefore, in the model presented in this paper, both the uncertainty of attribute values and the cost of updating are fully considered. In this paper, first, a new concept of attribute ratio is defined to describe an object when the attribute value of the object is numerical, and then, a dynamic three-way decision model is established. Second, a feature extraction algorithm of attribute values is proposed, and a pair of decision thresholds of the dynamic three-way decision model is also obtained according to the given conditions. Then, in the case where the attribute values are updated, an example is provided to demonstrate how two-way classification results can be obtained in the dynamic decision-making process. Finally, the results of simulation experiments show that the proposed model is feasible and effective in practical applications. When the number of objects in an accepted region has been given, according to the updating strategy of attribute values, the three-way decision problems are successfully solved by the proposed model.