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New insights on integer-programming models for the kidney exchange problem
Constantino, Miguel; Klimentova, Xenia; Viana, Ana; Rais, AbdurIn recent years several countries have set up policies that allow exchange of kidneys between two or more incompatible patient–donor pairs. These policies lead to what is commonly known as kidney exchange programs. The underlying optimization problems can be formulated as integer programming models. Previously proposed models for kidney exchange programs have exponential numbers of constraints or variables, whi...
A new mixed-integer programming model for harvest scheduling subject to maximum...
Constantino, Miguel; Martins, Isabel; Borges, J.G.Forest ecosystem management often requires spatially explicit planning because the spatial arrangement of harvests has become a critical economic and environmental concern. Recent research on exact methods has addressed both the design and the solution of forest management problems with constraints on the clearcut size, but where simultaneously harvesting two adjacent stands in the same period does not necessar...
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