Two fuzzy utility functions and a fuzzy preference relation are proposed on the basis of fuzzy maximum set, fuzzy minimum set and Hamming distance.

• 通过引入模糊极大集和模糊极小集为参照系统并以海明距离为计量工具,定义了两个模糊效用函数和一个模糊优先关系作为模糊集的排序指标。