Research Paper Fuzzy sets and their variants
1. A novel mathematical approach for fuzzy multi-period multi-objective portfolio optimization problem under uncertain environment and practical constraints

Pejman Peykani; Mojtaba Nouri; Farzad Eshghi; Mohammad Khamechian; Hamed Farrokhi-Asl

Volume 2, Issue 3 , Summer 2021, Pages 191-203

  Investment Portfolio Optimization (IPO) is one of the most important problems in the financial area. Also, one of the most important features of financial markets is their embedded uncertainty. Thus, it is essential to propose a novel IPO model that can be employed in the presence of uncertain data. ...  Read More

Review Paper Fuzzy sets and their variants
2. A new algorithm for fuzzy transportation problems with trapezoidal fuzzy numbers under fuzzy circumstances

Ladji Kane; Moctar Diakite; Souleymane Kane; Hawa Bado; Moussa Konate; Koura Traoré

Volume 2, Issue 3 , Summer 2021, Pages 204-225

  Transportation problem is an important network structured linear programming problem that arises in several contexts and has deservedly received a great deal of attention in the literature. The central concept in this problem is to find the least total transportation cost of a commodity in order to satisfy ...  Read More

Research Paper Linguistic term sets and their variants
3. Ranking of different of investment risk in high-tech projects using TOPSIS method in fuzzy environment based on linguistic variables

Mohammad Ebrahim Sadeghi; Hamed Nozari; Hadi Khajezadeh Dezfoli; Mehdi Khajezadeh

Volume 2, Issue 3 , Summer 2021, Pages 226-238

  Examining the trend of the global economy shows that global trade is moving towards high-tech products. Given that these products generate very high added value, countries that can produce and export these products will have high growth in the industrial sector. The importance of investing in advanced ...  Read More

Research Paper Intuitionistic fuzzy sets and their variants
4. An interval-valued atanassov’s intuitionistic fuzzy multi-attribute group decision making method based on the best representation of the WA and OWA operators

Ivanosca Andrade da Silva; Berta Bedregal; Benjamin Bedregal; Regivan Hugo Nunes Santiago

Volume 2, Issue 3 , Summer 2021, Pages 239-268

  In this paper we extend the notion of interval representation for interval-valued Atanassov's intuitionistic representations, in short $mathbb{L}^*$-representations, and use this notion to obtain the best possible one, of the weighted average (WA) and ordered weighted average (OWA) operators. A main ...  Read More

Research Paper Neutrosophic sets and their variants
5. An application of neutrosophic logic in the confirmatory data analysis of the satisfaction with life scale

Volkan Duran; Selcuk Topal; Florentin Smarandache

Volume 2, Issue 3 , Summer 2021, Pages 269-289

  The main concept of neutrosophy is that any idea has not only a certain degree of truth but also a degree of falsity and indeterminacy in its own right. Although there are many applications of neutrosophy in different disciplines, the incorporation of its logic in education and psychology is rather scarce ...  Read More