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中文摘要：
区间值信息系统是单值信息系统的一种扩充，如何对其进行属性约简是区间值多属性决策中的一个重要的问题．在已有的优势关系基础上，定义了α-β优势关系，得到基于新的优势关系的可辨识矩阵，进而对区间值信息系统进行属性约简，给出了约简算法．最后通过一个算例验证了新方法的可行性，并与已有方法进行了比较，结果表明所提出的方法更为简单有效．
英文摘要：
Interval valued information system is an expansion of the single valued information system. It is an important problem that how to carry on the attribute reduction in the research on multiple attribute decision making method. On the basis of the dominance relation, a novelα-β dominance relation is defined, then distinguish matrix based on new dominance relation is acquired. Attribute reduction method of interval valued information system is presented and the algorithm is also given. Finally, a numerical example proves the feasibility of the new method, and compared with existing methods, the results show that the proposed method is more simple and effective
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