【摘 要】
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The hesitant fuzzy set(HFS)is an important tool to deal with uncertain and vague information.In equipment system portfolio selection,the index attribute of the equipment system may not be expressed by precise data;it is usually described by qualitative in
【机 构】
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College of Systems Engineering,National University of Defense Technology,Changsha 410073,China
论文部分内容阅读
The hesitant fuzzy set(HFS)is an important tool to deal with uncertain and vague information.In equipment system portfolio selection,the index attribute of the equipment system may not be expressed by precise data;it is usually described by qualitative information and expressed as multiple possible va-lues.We propose a method of equipment system portfolio selec-tion under hesitant fuzzy environment.The hesitant fuzzy ele-ment(HFE)is used to describe the index and attribute values of the equipment system.The hesitation degree of HFEs measures the uncertainty of the criterion data of the equipment system.The hesitant fuzzy grey relational analysis(GRA)method is used to evaluate the score of the equipment system,and the im-proved HFE distance measure is used to fully consider the influ-ence of hesitation degree on the grey correlation degree.Based on the score and hesitation degree of the equipment system,two portfolio selection models of the equipment system and an equipment system portfolio selection case is given to illustrate the application process and effectiveness of the method.
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