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- Walton Pereira Coutinho, Roberto Quirino do Nascimento, Artur Alves Pessoa, Anand Subramanian
- INFORMS Journal on Computing
- 2016

This paper deals with the Close-Enough Traveling Salesman Problem (CETSP). In the CETSP, rather than visiting the vertex (customer) itself, the salesman must visit a specific region containing such vertex. To solve this problem, we propose a simple yet effective exact algorithm, based on Branch-and-Bound and Second Order Cone Programming (SOCP). The… (More)

- Roberto Quirino do Nascimento, Edson Figueiredo Lima, Rubia Mara de Oliveira Santos
- Discrete Applied Mathematics
- 2014

- Roberto Quirino do Nascimento, Edson Figueiredo Lima, Rubia Mara de Oliveira Santos
- Electronic Notes in Discrete Mathematics
- 2010

- Roberto Quirino do Nascimento, Ana Flávia Uzeda dos Santos Macambira, Lucídio dos Anjos Formiga Cabral, Renan Vicente Pinto
- Discrete Applied Mathematics
- 2014

In this problem we want to cover an ellipsoid using spheres that have their volumes already known. This problem takes part on the application of planning a treatment of brain tumor using stereotactic radiation therapy. The approaches existing in literature are based on Combinatorial Optimization. In this work we focus on the solution of a signomial… (More)

This article presents a system for solving location problems, which is integrated with a WebGIS system accessed via a Web browser and Internet connection. This system is meant to generate the matrix of real distances between clients and facilities. The Optimizer System is applied to the problem of locating collection zones and transmission (facilities),… (More)

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