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In this paper, first, we point out that fuzzy integers are not special cases of fuzzy numbers. Then, we define the concept of fuzzy integers, develop the methods for establishing rankings and total orderings on sets of fuzzy integers, and discuss the interrelationships between rankings and total orderings.
Based on the area between the curve of the membership function and the horizontal real axis, concepts of left and right wingspans are introduced. By them, a new index, called the w-center for fuzzy numbers is proposed. It is continuous with respect to the convergence of fuzzy number sequence. An intuitive and reasonable ranking method for fuzzy numbers based on their w-center is also established....
As a core business of logistic enterprise, logistics industry is focusing on the costs and benefits of logistic centers. Moreover, the location of the logistic centers plays a decisive role on whether it can give full play to their economies of scale and service advantages, but their influencing factors are numerous, uncertain and fuzzy. Therefore, how to choose the optimal logistic centers becomes...
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