Journal: Pesquisa Operacional

Found 223 papers in total
Data envelopment analysis in the study of the efficiency and benchmarks for Brazilian airlines
Data envelopment analysis in the study of the efficiency and benchmarks for Brazilian airlines
2003,
This paper aims to evaluate the efficiency of Brazilian air carriers. Data Envelopment...
Flow/multicommodity flow model for transportation and production planning problems
Flow/multicommodity flow model for transportation and production planning problems
2003,
We present here a Flow/Multicommodity Flow model for Transportation and Production...
Allocation of flows of passengers on a large public transport network formulated as a problem of variational inequalities
Allocation of flows of passengers on a large public transport network formulated as a problem of variational inequalities
2003,
The biggest cities in the world faced problems in the transportation system. In order...
A comprehensive urban parameter as a reference for local analyses in the lease-allocation models
A comprehensive urban parameter as a reference for local analyses in the lease-allocation models
2004,
The objective of this work is to evaluate the use of a global accessibility index as a...
Integer linear models with a polynomial number of variables and constraints for some classical combinatorial optimization problems
Integer linear models with a polynomial number of variables and constraints for some classical combinatorial optimization problems
2003,
We present integer linear models with a polynomial number of variables and constraints...
A polynomial algorithm for the packing problem of containers with static stability of load
A polynomial algorithm for the packing problem of containers with static stability of load
2003,
A polynomial computational bounded resources heuristic for the Three-Dimensional Bin...
Bayesian analysis of the differential functioning of item
Bayesian analysis of the differential functioning of item
2007,
This paper uses a Bayesian approach for parameter estimation in Item Response Theory...
On the convex hull of 3-cycles of the complete graph
On the convex hull of 3-cycles of the complete graph
2003,
Let Kn be the complete undirected graph with n vertices. A 3-cycle is a cycle...
On a conjecture concerning Helly circle graphs
On a conjecture concerning Helly circle graphs
2003,
We say that G is an e-circle graph if there is a bijection between its vertices and...
Computational complexity of classical problems for hereditary clique-Helly graphs
Computational complexity of classical problems for hereditary clique-Helly graphs
2004,
A graph is clique-Helly when its cliques satisfy the Helly property. A graph is...
Artificial immune system to solve the problem of minimum generating tree with parameters
Artificial immune system to solve the problem of minimum generating tree with parameters
2007,
This work proposes an heuristical approach based on evolutionary computation, whose...
A multi-start random constructive heuristic for the container loading problem
A multi-start random constructive heuristic for the container loading problem
2007,
This paper deals with the container loading problem which involves the selection of a...
A heuristic of simple tabu search for the problem of loading pallets of the producer
A heuristic of simple tabu search for the problem of loading pallets of the producer
2003,
The manufacturer's pallet loading problem consists in arranging, orthogonally and...
Conflict in networks: quoted origins and destinations
Conflict in networks: quoted origins and destinations
2004,
In a network confrontation, evader and detector look for optimal strategies on...
A dual–primal method applied in solving the problem of the optimum power flow
A dual–primal method applied in solving the problem of the optimum power flow
2004,
This paper presents a new approach for solving the Optimal Power Flow problem. In this...
An approach using artificial neural networks for solving problems of restricted optimization
An approach using artificial neural networks for solving problems of restricted optimization
2004,
Systems based on artificial neural networks have high computational rates due to the...
Optimization in forming groups on problems of composition of specialists
Optimization in forming groups on problems of composition of specialists
2007,
Estimation of real-valued functions from a finite set of samples is a central problem...
Combinatorial instruments in the design of a heuristic for the quadratic assignment problem
Combinatorial instruments in the design of a heuristic for the quadratic assignment problem
2003,
This work discusses the use of a neighbouring structure in the design of specific...
The Lagrangean relaxation/surrogate and the method of generating columns: new limitations and new columns
The Lagrangean relaxation/surrogate and the method of generating columns: new limitations and new columns
2003,
Column generation and Dantzig–Wolfe decomposition are very successful methods...
A numerical implementation of an interior point method for semidefinite programming
A numerical implementation of an interior point method for semidefinite programming
2003,
This paper is concerned with an algorithm proposed by Alizadeh for linear semidefinite...
Partial ranking in sets of partial solutions of problems of linear and quadratic assignment
Partial ranking in sets of partial solutions of problems of linear and quadratic assignment
2003,
We present an approach to Quadratic Assignment Problem, QAP, via a linear relaxation,...
A tool for assessing the results of various optimization models for diets
A tool for assessing the results of various optimization models for diets
2004,
This paper presents an interactive tool which allows the comparison of different...
Methods for simplex type dual problems of linear optimization channelled and sparse
Methods for simplex type dual problems of linear optimization channelled and sparse
2007,
Two-side constraint and sparse linear optimization problems, the main object of this...
A model for cost estimation of system for piggery wastes treatment ponds: a case study
A model for cost estimation of system for piggery wastes treatment ponds: a case study
2003,
This article presents the results from the monitoring of a system of ponds for the...
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