A NEW APPROACH OF FUZZY NUMBERS WITH DIFFERENT SHAPES AND DEVIATION
A.
Ghanizadeh
Department of Statistics, Islamic Azad University of Kermanshah Branch,
Kermanshah, Iran
author
N.
Parandin
Department of Mathematics, Islamic Azad University of Kermanshah Branch, Kermanshah, Iran
author
text
article
2014
eng
In this paper, we propose a new method for fuzzy numbers. In this method, we assume that Ai= (ai1, ai2, ai3, ai4) is to be a fuzzy number. So, the convex combination of ai1 and ai2 and also the convex combination of ai3 and ai4 are obtained separately. Then, Mic and Mis that are to be the convex combinations and the standard deviation respectively we acquire them from these components. Finally, we can obtain ranking index (Mi) that is the convex combination of, Mic and Mis. At the end of paper, in one example, the proposed method is compared with other methods.
Iranian Journal of Optimization
Islamic Azad University, Rasht Branch
2008-5427
06
v.
2
no.
2014
730
736
http://ijo.iaurasht.ac.ir/article_526829_4387ae04443c3fe52b0c60ad9beeaa47.pdf
Unweighted p-center problem on extended stars
Jafar
Fathali
Department of Mathematics, Shahrood University of Technology, University Blvd., Shahrood, Iran
author
Nader
Jafari Rad
Department of Mathematics, Shahrood University of Technology, University Blvd., Shahrood, Iran
author
Sadegh
Rahimi Sherbaf
Department of Mathematics, Shahrood University of Technology, University Blvd., Shahrood, Iran
author
text
article
2014
eng
An extended star is a tree which has only one vertex with degree larger than two. The -center problem in a graph asks to find a subset of the vertices of of cardinality such that the maximum weighted distances from to all vertices is minimized. In this paper we consider the -center problem on the unweighted extended stars, and present some properties to find solution.
Iranian Journal of Optimization
Islamic Azad University, Rasht Branch
2008-5427
06
v.
2
no.
2014
737
744
http://ijo.iaurasht.ac.ir/article_526830_37ef51736b0d3ec69e1bab922522c3ec.pdf
Application of G'/G-expansion method to the (2+1)-dimensional dispersive long wave equation
Jafar
Biazar
Department of Mathematics, Faculty of Science, University of Guilan
author
Zainab
Ayati
Department of Mathematics, Faculty of Science, University of Guilan
author
text
article
2014
eng
In this work G'/G-expansion method has been employed to solve (2+1)-dimensional dispersive long wave equation. It is shown that G'/G-expansion method, with the help of symbolic computation, provides a very effective and powerful mathematical tool, for solving this equation.
Iranian Journal of Optimization
Islamic Azad University, Rasht Branch
2008-5427
06
v.
2
no.
2014
745
752
http://ijo.iaurasht.ac.ir/article_526831_5a32c146da7b46934bb4a19fbcc72b71.pdf