this article addresses a single row facility layout problem where the objective is to optimize the arrangement of some rectangular facilities with different dimensions on a line. regarding the np-hard nature of the considered problem, a hybrid meta-heuristic algorithm based on simulated annealing has been proposed to obtain a near optimal solution. a number of test problems are randomly generat...

in the present work, high temperature tensile properties of medium density polyethylene (mdpe) and its nanocomposites are investigated. for this purpose mdpe reinforced with different weight percentages of nano-sized calcium (2, 5, 10) are produced by compression moulding method. tensile tests have been carried out at different temperatures, i.e. 30, 60, 90c using thermomechanical analysis (tm...

This paper presents a case study in which we identified problems end users have with their software systems and how they try to solve these problems. The case study is part of a bigger research project, in which we develop appropriate end user development tools for enterprise resource planning systems of small and medium sized enterprises. During our study, we carried out several interviews wit...

Please cite this article in press as: Mahdav with Applications (2008), doi:10.1016/j.esw Cellular manufacturing (CM) is an industrial application of group technology concept. One of the problems encountered in the implementation of CM is the cell formation problem (CFP). The CFP attempted here is to group machines and parts in dedicated manufacturing cells so that the number of voids and except...

This paper shows how certain robust multi objective feedback design problems can be reduced to quanti er elimination QE problems In particular it is shown how robust stabilization and robust frequency domain performance speci cations can be reduced to systems of polynomial inequalities with suitable logic quanti ers and Because of computational complexity the size of problems that can solved by...

A multiresolution impedance method for the solution of low-frequency electromagnetic interaction problems typically encountered in bioelectromagnetics is presented. While the impedance method in its original form is based on the discretization of the scattering objects into equal-sized cells, our formulation decreases the number of unknowns by using an automatic mesh generation method that does...

Sequential computations can benefit from distributed computing through the use of self-migrating threads. On large problems, significant performance improvement is achieved by eliminating disk paging completely, trading off against a modest amount of data communication. The key idea is to have computation and small-sized data move to meet with large-sized data rather than the other way around. ...

We consider the NP Hard problems of online Bin Covering and Packing while requiring that larger (or longer, in the one dimensional case) items be placed at the bottom of the bins, below smaller (or shorter) items — we call such a version, the LIB version of problems. Bin sizes can be uniform or variable. We look at computational studies for both the Best Fit and Harmonic Fit algorithms for unif...

This paper addresses a green capacitated vehicle routing problem that accounts for transportation emissions. A Dynamic Programming approach has been used to formulate the problem. Although small-sized problems can be solved by Programming, this is infeasible larger due curse of dimensionality. Therefore, we propose based solution involves ideas restriction, simulation and online control paramet...

This paper is concerned about how to optimize the input sequence for a mixed-model assembly line (MMAL) with limited intermediate buffers. Three optimization objectives are considered simultaneously: minimizing the total production rate variation, the total setup, and the total assembly cost. The mathematical model is presented by incorporating the three objectives. Since the problem is NP-hard...