中文摘要：

将变精度的思想引入优势值关系的集值决策系统中，构建了一种基于优势值关系的变精度集值决策系统粗糙集模型．并讨论了该模型的性质及阈值β的变化对模型的影响。新模型可以处理存在偏序关系的不确定或不完备信息系统，并具有一定的容错能力。另一方面，通过合理设置参数β可使新模型的分类效果更加符合实际情况以及人在数据处理过程中的直观感受。实例分析进一步验证了相关结论的正确性。

英文摘要：

The variable precision idea is introduced in the dominance relation value of set-valued decision system, buil- ding a variable precision rough set model of set-valued decision system based on dominance relation value, and discussing the nature of the model as well as the impact of changes on the threshold/3 model. The new model can not only deal with the uncertainty of the existence of partial order relationship or incomplete information system, but also has a certain degree of fault tolerance. On the other hand, by setting the appropriate parameters/3, the classification results of the new model become more consistent with the actual situation as well as human＇ s intui- tive feeling during data processing. Case analysis further verifies the correctness of related conclusion.