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New Multi-layer Method for Z-number Ranking Using Hyperbolic Tangent Function and Convex Combination

Somayeh Ezadia, Tofigh Allahviranloob

a Department of Applied Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran;
b Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran

* Corresponding Author: Tofigh Allahviranloo,

Intelligent Automation & Soft Computing 2018, 24(1), 217-221.


Many practical applications, under the definitive evolutionary state of the nature, the consequences of the decisions, mental states of a decision maker are required. Thus, the need is for a new concept in the analysis of decision-making. Zadeh has introduced this concept as the Z-number. Because the concept is relatively new, Z-number in fuzzy sets, hence, its basic theoretical aspects are yet undetermined. This paper presents a method for ranking Z-numbers. Hence, we propose a new method for ranking fuzzy numbers based on that of hyperbolic tangent function and convex combination. Then, using the same technique we propose a method for ranking Z-numbers.


Cite This Article

. Somayeh Ezadi and . Tofigh Allahviranloo, "New multi-layer method for z-number ranking using hyperbolic tangent function and convex combination," Intelligent Automation & Soft Computing, vol. 24, no.1, pp. 217–221, 2018.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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