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We consider the internal rate of return (IRR) decision rule in capital budgeting problems with fuzzy cash flows. The possibility distribution of the IRR at any r ≥ 0, is defined to be the degree of possibility that the (fuzzy) net present value of the project with discount factor r equals to zero. Generalizing our earlier results on fuzzy capital budegeting problems [Car99] we show that the possibility distribution of the {IRR} is a highly nonlinear function which is getting more and more unbalanced...
This paper presents a migration strategy for a set of mobile agents (MAs) in order to satisfy customers' requests in a transport network, through a multimodal information system. In this context, we propose an optimization solution which operates on two levels. The first one aims to constitute a set of MAs building their routes, called Workplans. At this level, Workplans must incorporate all nodes, representing information providers in the multimodal network, in order to explore it completely....
This paper presents the approach that we developed to
solve the ROADEF 2003 challenge problem. This work is part of a research
program whose aim is to study the benefits and the computer-aided generation
of hybrid solutions that mix constraint programming and meta-heuristics,
such as large neighborhood search (LNS). This paper focuses on three
contributions that were obtained during this project: an improved method for
propagating Hamiltonian chain constraints, a fresh look at limited
discrepancy...
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