Journal: Investigao Operacional

Found 215 papers in total
A random key based genetic algorithm for scheduling operations
A random key based genetic algorithm for scheduling operations
1999,
This paper presents a new genetic algorithm for scheduling operations. The chromosome...
Optimization of a municipal solid waste collection system
Optimization of a municipal solid waste collection system
1999,
This paper deals with a problem of organizing a solid waste collection system in...
A data envelopment analysis evaluation of the modernization of telecommunication services in OECD countries – the situation of Portugal
A data envelopment analysis evaluation of the modernization of telecommunication services in OECD countries – the situation of Portugal
1999,
DEA (Data Envelopment Analysis) is used as a tool to analyse and evaluate the present...
Derivate-free methods for unconstrained nonsmooth optimization and its numerical analysis
Derivate-free methods for unconstrained nonsmooth optimization and its numerical analysis
1999,
Numerical algorithms for solving the unconstrained problems of Lipschitz optimization...
A bayesian dynamic formulation to analyse extreme values
A bayesian dynamic formulation to analyse extreme values
1999,
The analysis of extreme values data via classical arguments makes a thorough use of...
Integer solutions of multicriteria network flow problems
Integer solutions of multicriteria network flow problems
1999,
This paper is concerned with the solution of integer multicriteria network flow...
The optimal path problem
The optimal path problem
1999,
In this paper, the optimal path problem will be studied from a global point of view...
Automatic reformulation for general mixed 0–1 linear programs
Automatic reformulation for general mixed 0–1 linear programs
1999,
The efficiency of solving mixed 0–1 linear programs by linear programming based...
Optimal scheduling for letter sorter machines
Optimal scheduling for letter sorter machines
1999,
In this paper three approaches are proposed to generate schedules for the letter...
Multicast routing tree optimisation
Multicast routing tree optimisation
1998,
High bandwidth networks allow new distributed applications which involve all the hosts...
A multiobjective linear programming method based on the projection of the objective function gradients
A multiobjective linear programming method based on the projection of the objective function gradients
1998,
This paper presents an interactive method for decision support to multiobjective...
The efficiency of optimization methods based on line searches
The efficiency of optimization methods based on line searches
1998,
In nonlinear multidimensional optimization line search techniques aim to compute an...
Characteristics and applications of random search methods for mathematical programming
Characteristics and applications of random search methods for mathematical programming
1998,
In this paper we discuss the development of the random search method for mathematical...
A neural heuristic for school timetabling
A neural heuristic for school timetabling
1998,
The paper analyses the problem of timetabling in high schools. This slow and laborious...
Strategic approaches to climate change at country level – focusing on greenhouse gas abatement
Strategic approaches to climate change at country level – focusing on greenhouse gas abatement
1998,
National climate change costing studies would generally benefit from the strengthening...
Estimation of the optimal lambda of the RiskMetrics™ methodology
Estimation of the optimal lambda of the RiskMetrics™ methodology
1998,
The goal of this work is to investigate the returns of the TELEBRÁS PN asset,...
A causal forecasting model for the sales of a consumer product
A causal forecasting model for the sales of a consumer product
1998,
This paper presents a forecasting model for bimester trade sales of Johnson &...
The Management Information System at INEGI
The Management Information System at INEGI
1998,
This paper presents SIGEI, the Management Information System of INEGI. SIGEI supports...
Modelling a wholesale system for pharmaceutical products in the area of Castelo Branco, Portugal
Modelling a wholesale system for pharmaceutical products in the area of Castelo Branco, Portugal
1998,
In this paper we present a modelling methodology, applied to a pharmaceutical products...
Stochastic processes to support predictive maintenance for industrial environments
Stochastic processes to support predictive maintenance for industrial environments
1998,
This paper presents and discusses the usage of stochastic processes to support...
A new branching scheme for job shop scheduling
A new branching scheme for job shop scheduling
1998,
The job-shop scheduling problem consists in scheduling a set of jobs on a set of...
Solution of some linear complementarity problems arising in variational models of mechanics
Solution of some linear complementarity problems arising in variational models of mechanics
1998,
In this paper we investigate the use of a block principal pivoting and an...
Optimality and algorithm for generalized invex Chebyshev problem
Optimality and algorithm for generalized invex Chebyshev problem
1997,
In this paper Clarke's generalized directional derivative is used to establish...
Description of a new algorithm for the vehicle routing and scheduling problem and comparative analysis of its performance
Description of a new algorithm for the vehicle routing and scheduling problem and comparative analysis of its performance
1997,
This article describes a novel algorithm for the vehicle routing and scheduling...
Papers per page: