Country: Portugal

Found 202 papers in total
Computational experiments with flow models for multicommmodity using non linear and non-separable cost functions
Computational experiments with flow models for multicommmodity using non linear and non-separable cost functions
2007,
In this paper we present the study and the numerical implementation of the...
Potential Energy Minimization of Nonlinear Structural Systems: a comparison of numerical algorithms for nonlinear programming
Potential Energy Minimization of Nonlinear Structural Systems: a comparison of numerical algorithms for nonlinear programming
2007,
The main aim of the present work is to develop a formulation and some strategies for...
Long-term non-linear model for the power requirement of the Brazilian electricity system
Long-term non-linear model for the power requirement of the Brazilian electricity system
2007,
The formerly closed Brazilian electrical energy market has been disclosed for...
Variables selection in Data Envelopment Analysis applied to an analysis of the electric energy market
Variables selection in Data Envelopment Analysis applied to an analysis of the electric energy market
2007,
In this paper we have two main goals. From a theoretical point of view we intend to...
Optimal scheduling of hydro power systems considering the head change effect
Optimal scheduling of hydro power systems considering the head change effect
2007,
This paper focuses on the optimal scheduling of hydro power systems. A new methodology...
Optimal scheduling of thermal power systems considering emission constraints
Optimal scheduling of thermal power systems considering emission constraints
2006,
This paper focuses on the optimal scheduling of thermal power systems. A new...
Latent variable scores: An option for customer satisfaction index of Brazilian Electricity Regulatory Agency
Latent variable scores: An option for customer satisfaction index of Brazilian Electricity Regulatory Agency
2006,
Structural Equation Models with unobservable variables and measurement error have been...
Utilization of Monte Carlo Simulation and Threshold Curve to Value American Put Options
Utilization of Monte Carlo Simulation and Threshold Curve to Value American Put Options
2007,
In 1973 Black and Scholes published their article on the valuation of European option....
An approximate solution classification model through optimization techniques
An approximate solution classification model through optimization techniques
2006,
In this work we consider the problem about classification of objects (products,...
The variation in seismic activity throughout the year in the Iberian Peninsula
The variation in seismic activity throughout the year in the Iberian Peninsula
2006,
The objective is to research on the existence of a significant variation in the number...
Branch and price algorithms for production lot sizing
Branch and price algorithms for production lot sizing
2006,
In this paper, we present two algorithms for the multi-item capacitated lot-sizing...
Valuing the acquisition of an information technology asset through the least squares Monte Carlo method
Valuing the acquisition of an information technology asset through the least squares Monte Carlo method
2006,
In this article, a project based on the acquisition of an information technology asset...
Statistical inference of efficiency estimators obtained with the DEA non parametric frontier technique. A bootstrap methodology
Statistical inference of efficiency estimators obtained with the DEA non parametric frontier technique. A bootstrap methodology
2006,
The efficiency measurement of decision making units is a key-task in contemporary...
Fuzzy DEA frontier in agricultural efficiency evaluation
Fuzzy DEA frontier in agricultural efficiency evaluation
2006,
This paper uses Data Envelopment Analysis (DEA) to measure the efficiency of some...
Considerations about the rankings of High Schools
Considerations about the rankings of High Schools
2006,
The publication of rankings about high schools, started in 2001, had a significant...
An integer programming model for truss topology optimization
An integer programming model for truss topology optimization
2006,
In this paper a truss-structure model is described for finding a kinematically stable...
Applying data warehousing technology to support planning and control on mass transit companies
Applying data warehousing technology to support planning and control on mass transit companies
2006,
This paper describes the methodology used in the construction of a Data Warehousing...
An &Xmacr; chart with variable sample sizes; a new adaptive method
An &Xmacr; chart with variable sample sizes; a new adaptive method
2006,
In the last years a new class of control charts which parameters change during...
An extension of a variant of a predictor–corrector primal–dual method from linear programming to semidefinite programming
An extension of a variant of a predictor–corrector primal–dual method from linear programming to semidefinite programming
2005,
We extend a variant of a predictor–corrector primal–dual method for Linear...
Application of the volume algorithm to the approximate and exact solving of the asymmetric traveling salesman problem
Application of the volume algorithm to the approximate and exact solving of the asymmetric traveling salesman problem
2005,
In this paper we present computational results with the volume algorithm, a variant of...
Upper and lower bounds for non-radial efficiencies in data envelopment analysis: a vector approach
Upper and lower bounds for non-radial efficiencies in data envelopment analysis: a vector approach
2005,
This paper presents a new approach to evaluate non-radial DEA efficiencies. This...
The art and science of problem solving
The art and science of problem solving
2005,
In this paper we will document that real-life problem solving in complex situations...
Recovery logistics management in Portugal
Recovery logistics management in Portugal
2005,
Following the communitarian politics, Portugal has to implement wasted management...
Turning machine statica evaluation using methods for ranking improvement of DEA models
Turning machine statica evaluation using methods for ranking improvement of DEA models
2005,
In this paper we present turning machine study with the use of Data Envelopment...
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