Mohammed Sbihi

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This paper considers a single machine scheduling problem with several mainte-nances periods. Specically, two situations are investigated. In the rst one, maintenance periods are periodically xed: maintenance is required after a periodic time interval. In the second one, the maintenance is not xed but the maximum continuous working time of the machine which(More)
We discuss the spectral properties of collisional semigroups associated to various models from transport theory by exploiting the links between the so-called resolvent approach and the semigroup approach. Precisely, we show that the essential spectrum of the full transport semigroup coincides with that of the collisionless transport semigroup in any(More)
In order to efficiently and robustly land more aircraft on two parallel runways, search the conflict-free and less-delay reroute for arrival aircraft, we plan to control arrival aircraft with a novel trajectory operation model named Multi-layer Point Merge System (ML-PM). In this paper, firstly the notional example of ML-PM system is introduced, the(More)
In this study, we propose a Simulated Annealing (SA) method to solve the problem of designing multiple Standard Instrument Departure (SID) routes and Standard Terminal Arrival Routes (STAR) in Terminal Maneuvering Area (TMA) with optimal lengths. This work extends our previous work (J. Zhou et al., 2015) for the design of one optimal route. The design of(More)
We investigate the spectral properties of a class of weighted shift semigroups (U(t))t>0 associated to abstract transport equations with a Lipschitz–continuous vector field F with no– reentry boundary conditions. Generalizing the results of [25], we prove that the semigroup (U(t))t>0 admits a canonical decomposition into three C0-semigroups (U1(t))t>0,(More)
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