期刊
SYMMETRY-BASEL
卷 14, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/sym14051004
关键词
sequential three-way decision; medical diagnosis; similarity; threshold
资金
- National Natural Science Foundation of China [71871229]
- Hunan Provincial Natural Science Foundation of China [2021JJ30031]
This study proposed a novel sequential three-way decision model based on similarity relation for calculating conditional probability, applied in medical diagnosis, and validated its effectiveness through experiments.
In the sequential three-way decision model (S3WD), conditional probability and decision threshold pair are two key elements affecting the classification results. The classical model calculates the conditional probability based on the strict equivalence relationship, which limits its application in reality. In addition, little research has studied the relationship between the threshold change and its cause at different granularity levels. To deal with these deficiencies, we propose a novel sequential three-way decision model and apply it to medical diagnosis. Firstly, we propose two methods of calculating conditional probability based on similarity relation, which satisfies the property of symmetry. Then, we construct an S3WD model for a medical information system and use three different kinds of cost functions as the basis for modifying the threshold pair at each level. Subsequently, the rule of the decision threshold pair change is explored. Furthermore, two algorithms used for implementing the proposed S3WD model are introduced. Finally, extensive experiments are carried out to validate the feasibility and effectiveness of the proposed model, and the results show that the model can achieve better classification performance.
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