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针对信息不完全的偏好多属性决策问题,给出一种基于拓展粗糙集的决策分析模型.首先提出限制优势关系的概念;然后在限制优势关系下得到知识的粗糙近似,给出分类决策规则.对比分析证明,限制优势关系既保留了扩展优势关系的优点,又在一定程度上克服了扩展优势关系的局限性.最后通过一个实例验证了所提出的模型对信息不完备决策系统的处理更符合实际情况。
In order to solve the problem of partial attribute preference decision with incomplete information, a decision analysis model based on extended rough sets is proposed. First, the concept of restricting dominant relation is proposed. Then the rough approximation of knowledge is obtained under the restriction of dominant relation, and the classification decision rules are given. Comparative analysis proves that restricting the superiority relationship not only retains the advantage of expanding superiority relationship, but also overcomes the limitation of extending superiority relation to some extent.Finally, an example is given to verify that the proposed model fits the processing of incomplete information decision-making system The actual situation.