Country: Portugal

Found 202 papers in total
A model and a heuristic for the primary health care coverage planning problem in Portugal – application to ‘Cova da Beira’ case
A model and a heuristic for the primary health care coverage planning problem in Portugal – application to ‘Cova da Beira’ case
2005,
This communication presents an attempt in order to help on the Planning of a Primary...
Creativity for operational researchers
Creativity for operational researchers
2005,
This paper presents some modern and interdisciplinary concepts about creativity and...
Using optimization to solve truss topology design problems
Using optimization to solve truss topology design problems
2005,
The design of truss structures is an important engineering activity which has...
Automatic generation of simulation models of an auto-radio production line
Automatic generation of simulation models of an auto-radio production line
2005,
This paper reports the development of a computer application to support the decision...
Traffic simulation of signal controlled intersections
Traffic simulation of signal controlled intersections
2005,
The installation of traffic lights at street intersections is a common practice in...
An improved lower bound for the asymmetric traveling salesman problem based on the assignment problem
An improved lower bound for the asymmetric traveling salesman problem based on the assignment problem
2005,
In this article we describe how to compute a lower bound for the asymmetric traveling...
Fuzzy DEA (data envelopment analysis) frontiers
Fuzzy DEA (data envelopment analysis) frontiers
2005,
The “fuzzy” DEA frontier is applied in situations where some variables...
“Mixture of local experts” model for data classification
“Mixture of local experts” model for data classification
2005,
In this paper we present a Mixture of Local Experts Model (MLEM) for data...
Reliability assessment of non-Markovian complex production systems using a hierarchical approach
Reliability assessment of non-Markovian complex production systems using a hierarchical approach
2004,
In the actual context of global, intense competitiveness, the performance of the...
Scheduling variable processing time operations in systems with buffers
Scheduling variable processing time operations in systems with buffers
2004,
In this work a scheduling operation problem with variable processing times is...
Heuristic sensitivity analysis for baker's yeast model parameters
Heuristic sensitivity analysis for baker's yeast model parameters
2004,
Baker's yeast, essentially composed by living cells of Saccharomyces cerevisiae , used...
Teachers' perception and actual students ranking in performance appraisal
Teachers' perception and actual students ranking in performance appraisal
2004,
This paper intends to evaluate the academic evolution of an engineering students group...
A multiobjective model for the location of capacitors in radial distribution networks
A multiobjective model for the location of capacitors in radial distribution networks
2004,
The installation of shunt capacitors in electrical distribution networks can...
Lot sizing and scheduling in a large automated foundry
Lot sizing and scheduling in a large automated foundry
2004,
This work consists of a case study in a large foundry, which has three molding lines...
Graph-based structures for the market baskets analysis
Graph-based structures for the market baskets analysis
2004,
The market basket is defined as an itemset bought together by a customer on a single...
Performance of the truncated Newton method in unconstrained nonlinear optimization
Performance of the truncated Newton method in unconstrained nonlinear optimization
2004,
Newton's method for unconstrained nonlinear optimization can be a demanding iterative...
A smoothed frontier for the 3-dimensional BCC-DEA model
A smoothed frontier for the 3-dimensional BCC-DEA model
2004,
The multipliers DEA model has multiple optimal solutions in the extreme-efficient...
Factorial analysis applied to landscape metrics defined in FRAGSTATS
Factorial analysis applied to landscape metrics defined in FRAGSTATS
2004,
A program for spatial analysis based on a grid of pixels (FRAGSTATS 3.0) was used and...
A note on polynomially-solvable cases of common due date early–tardy scheduling with release dates
A note on polynomially-solvable cases of common due date early–tardy scheduling with release dates
2004,
In this paper we consider the single machine scheduling problem with integer release...
A multi-phase heuristic for the delivery pick-up vehicle-routing problem with time-windows
A multi-phase heuristic for the delivery pick-up vehicle-routing problem with time-windows
2004,
In this paper a new heuristic for the vehicle routing problem is presented. This...
Vehicle routing in a wood waste pickup system
Vehicle routing in a wood waste pickup system
2004,
In this paper, we analyze a new vehicle routing problem, the Prize Collecting Vehicle...
On the use of multiple financial methods in the evaluation and selection of investment projects
On the use of multiple financial methods in the evaluation and selection of investment projects
2004,
This paper addresses the analysis and evaluation of investment projects within a...
MICROPLANO – A decision support system for production planning in the plastic industry
MICROPLANO – A decision support system for production planning in the plastic industry
2003,
In this paper we introduce a production-scheduling problem in a Portuguese small...
A facility layout design support system
A facility layout design support system
2003,
The design of facility layouts involves a decision process which, due to its...
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