in this paper, we show that inverse data envelopment analysis (dea) models can be used to estimate output with fuzzy data for a decision making unit (dmu) when some or all inputs are increased and deficiency level of the unit remains unchanged.

In recent years, the static and the dynamic jobs scheduling onto heterogeneous processors present a very well studied problem. Typically the Data Grid Scheduling problem (DGS) has recently become an active research area. The heterogeneous processors scheduling problem (HPSP) can be formulated in several ways and the efficient scheduling of the HPSP on the available resources is one of the key f...

Selection hyper-heuristics are automated methodologies for selecting existing low-level heuristics to solve hard computational problems. They have been found very useful for evolutionary algorithms when solving both single and multi-objective real-world optimization problems. Previous work mainly focuses on empirical study, while theoretical study, particularly in multi-objective optimization, ...

We introduce and test a new approach for the bi-objective routing problem known as the traveling salesman problem with profits. This problem deals with the optimization of two conflicting objectives: the minimization of the tour length and the maximization of the collected profits. This problem has been studied in the form of a single objective problem, where either the two objectives have been...

1 School of Computer Science and Engineering, Dalian Maritime University, 116026 Dalian, China 2 Department of Computer, Dalian University of Technology, 116023 Dalian, China [email protected] 3 Centre for Quantifiable Quality of Service in Communication Systems, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway [email protected] http://www.softcomputing.net 4 Dept. d...

1 Centre for Quantifiable Quality of Service in Communication Systems, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway [email protected] http://www.softcomputing.net 2 School of Computer Science and Engineering, Dalian Maritime University, 116026 Dalian, China 3 Department of Computer, Dalian University of Technology, 116023 Dalian, China [email protected] 4 Departm...

In this paper, we introduce the concept of complex multi-fuzzy sets (CMkFSs) as a generalization of the concept of multi-fuzzy sets by adding the phase term to the definition of multi-fuzzy sets. In other words, we extend the range of multi-membership function from the interval [0,1] to unit circle in the complex plane. The novelty of CMkFSs lies in the ability of complex multimembership functi...

The performance of horizontal axis tidal current turbines (HATCT) strongly depends on their geometry. According to this fact, the optimum performance will be achieved by optimized geometry. In this research study, the multi objective optimization of the HATCT is carried out by using four different multi objective optimization algorithms and their performance is evaluated in combination with bla...