Xuan Thao Nguyen

Work place: Department of applied Math- Informatics, Faculty of Information Technology, Vietnam national university of agriculture (VNUA)

E-mail: thaonx281082@yahoo.com


Research Interests: Data Mining, Data Structures and Algorithms


X.T. Nguyen was born on October 28, 1982, in Thai Binh, Viet Nam. He received the B.Sc. and M.S Degrees, in Mathematic from The College of Science, Vietnamese National University (VNU), Hanoi, in 2004 and 2009, respectively.

Now, he is a lecturer in Department of applied Math-Informatics, Faculty of Information Technology, Vietnam National University of Agriculture (VNUA). He is teaching Calculus, Optimization, Fuzzy logic and application. His research interests are Spectral theory of operator Fuzzy set theory, Rough set theory and application in data mining. His representative published article: Remarks on the  spectrum of a compact convex set of compact operators, Journal of Applied Analysis 16 (2010), pp 259–264, and Rough Fuzzy Relation on Two Universal Sets, I.J. Intelligent Systems and Applications, 2014, 04, 49-55.

Author Articles
Support-Intuitionistic Fuzzy Set: A New Concept for Soft Computing

By Xuan Thao Nguyen Van Dinh Nguyen

DOI: https://doi.org/10.5815/ijisa.2015.04.02, Pub. Date: 8 Mar. 2015

Today, soft computing is a field that is used a lot in solving real-world problems, such as problems in economics, finance, banking... With the aim to serve for solving the real problem, many new theories and/or tools which were proposed, improved to help soft computing used more efficiently. We can mention some theories as fuzzy sets theory (L. Zadeh, 1965), intuitionistic fuzzy set (K Atanasov, 1986). In this paper, we introduce a new notion of support-intuitionistic fuzzy (SIF) set, which is the combination a intuitionistic fuzzy set with a fuzzy set. So, SIF set is a directly extension of fuzzy set and intuitionistic fuzzy sets (Atanassov). Then, we define some operators on support-intuitionistic fuzzy sets, and investigate some properties of these operators.

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Rough Fuzzy Relation on Two Universal Sets

By Xuan Thao Nguyen Van Dinh Nguyen Doan Dong Nguyen

DOI: https://doi.org/10.5815/ijisa.2014.04.05, Pub. Date: 8 Mar. 2014

Fuzzy set theory was introduced by L.A. Zadeh in 1965. Immediately, it has many applications in practice and in building databases, one of which is the construction of a fuzzy relational database based on similar relationship. The study of cases of fuzzy relations in different environments will help us understand its applications. In this paper, the rough fuzzy relation on Cartesian product of two universe sets is defined, and then the algebraic properties of them, such as the max, min, and composition of two rough fuzzy relations are examined. Finally, reflexive, α-reflexive, symmetric and transitive rough fuzzy relations on two universe sets are also defined.

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