TY - JOUR AB - Purpose– The purpose of this paper is to present research methods in processing uncertain information.Design/methodology/approach– Vague set and rough set are both‐wings‐mode for expressing uncertainty systems, and based on the both‐wings‐mode of expressing uncertainty systems, the connections of vague set and rough set are discussed.Findings– This paper presents the relationships between vague set and rough set.Research limitations/implications– Based on these connections between vague set and rough set, theoretical and means of vague set can be used for rough set; also theoretical and means of rough set can be used for vague set.Originality/value– The paper contributes to the discussion on the research of vague set and rough set. The conclusions are useful in information processing. VL - 41 IS - 9 SN - 0368-492X DO - 10.1108/03684921211275351 UR - https://doi.org/10.1108/03684921211275351 AU - Yan Ruixia AU - Liu Jinliang AU - Yao Bingxue ED - Yi Lin ED - Hejing Xiong ED - Mianyun Chen PY - 2012 Y1 - 2012/01/01 TI - The connections of vague set and rough set T2 - Kybernetes PB - Emerald Group Publishing Limited SP - 1318 EP - 1322 Y2 - 2024/03/29 ER -