Journal: Investigao Operacional

Found 215 papers in total
Finding an initial feasible solution in linear programming
Finding an initial feasible solution in linear programming
1994,
In most approaches, the resolution of a linear programming problem needs a starting...
Risk analysis using time Petri nets
Risk analysis using time Petri nets
1994,
This paper discusses some possible uses of Petri nets in risk analysis. After...
The Weiszfeld method in single facility location
The Weiszfeld method in single facility location
1994,
In this paper two algorithms based on the Weiszfeld method are proposed to solve the...
A decision support system for single machine scheduling problems
A decision support system for single machine scheduling problems
1992,
Production planning often implies scheduling a set of tasks, involving very complex...
Sucessive Amplification Methods
Sucessive Amplification Methods
1992,
When dealing with multiple criteria decision problems, the Decision Maker may be...
A state space relaxation approach
A state space relaxation approach
1992,
This paper reports on a lower bound technique based on state space relaxation for a...
Linear and Lagrangean penalties for variable bounding in ILP: An application to a covering problem
Linear and Lagrangean penalties for variable bounding in ILP: An application to a covering problem
1992,
Lagrangean and linear penalties can be used for variable bounding in ILP. Such...
Location of extensive facilities: Potential applications
Location of extensive facilities: Potential applications
1992,
While problems involving location of facilities, which can be represented as points,...
Location of semiobnoxious facilities. Different approaches
Location of semiobnoxious facilities. Different approaches
1992,
The paper presents some approaches for locating semiobnoxious facilities in a given...
Study of vehicle replacement scenarios in the Portuguese market
Study of vehicle replacement scenarios in the Portuguese market
1992,
This particle presents a vehicle replacement study based upon operating and...
The role of information technologies in value added chains. A revisited approach
The role of information technologies in value added chains. A revisited approach
1991,
Geographic Information Systems (GIS) Technology has been applied to solve transport...
Transport policies in the information age-Moving cities on Wheels and Wires
Transport policies in the information age-Moving cities on Wheels and Wires
1991,
Today, many people think we are on the threshold of another ‘transport...
Information for transport planning, and Geographic Information Systems
Information for transport planning, and Geographic Information Systems
1991,
Geographic Information Systems (GIS) Technology has been applied to solve transport...
The future of transport policies in the metropolitan areas of Lisbon and Porto
The future of transport policies in the metropolitan areas of Lisbon and Porto
1991,
The metropolitan areas of Lisbon and Porto live presently in a situation of strong...
New information technology in urban and regional management
New information technology in urban and regional management
1991,
Information technology is exhibiting a vertiginous growth which affects all areas of...
Accessibility in metropolitan areas in the 21st century-The case of Lisbon
Accessibility in metropolitan areas in the 21st century-The case of Lisbon
1991,
The accessibility concept has been evolving very rapidly, through the introduction of...
Contemporary urban transport planning in the United Kingdom
Contemporary urban transport planning in the United Kingdom
1991,
This paper examines some of the salient features of local transport planning in the...
An algorithm for the multiobjective shortest path problem on acyclic networks
An algorithm for the multiobjective shortest path problem on acyclic networks
1991,
In this paper a new algorithm for the determination of the set of nondominated paths...
Computational techniques for solving global optimization problems
Computational techniques for solving global optimization problems
1991,
Global optimization has been the subject of active research in the last two decades....
Solution of large-scale strictly convex Linear Complementarity Problems
Solution of large-scale strictly convex Linear Complementarity Problems
1991,
The Linear Complementarity Problem (LCP) consists of finding vectors z∈R n and...
A parallel tour-building heuristic for the m-traveling salesmen problem
A parallel tour-building heuristic for the m-traveling salesmen problem
1991,
A solution method is presented to solve the m- traveling salesman problem ( m- TSP)...
The location of lifeboats along the Atlantic coast of Portugal
The location of lifeboats along the Atlantic coast of Portugal
1991,
Portugal is a country with a wide Atlantic coast. Instituto de Socorros a...
Relational databases in regional management: Two case studies
Relational databases in regional management: Two case studies
1991,
In this paper the authors’ experience in the design and implementation of a...
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