We investigate the use of cooperative multi-agent allocation techniques on problems related to Earth observation scenarios with multiple users and satellites. We focus on the problem of coordinating users having reserved exclusive orbit portions and one central planner having several requests that may use some intervals of these exclusives. We defi...
RailBeijing 2021, 9th International Conference on Railway Operations Modelling and Analysis (ICROMA), Pékin, CHINE, 03-/11/2021 - 07/11/2021
In this paper, we consider a multi-robot deployment problem involving a set of robots which must realize observation tasks at different locations and navigate through a shared network of waypoints. To solve this problem, we develop a two-level approach which alternates between (a) quickly obtaining high-level schedules based on a coarse grain CP mo...
In order to reduce irrigation water withdrawal, the European Commission provides grants to farmers for investments in irrigation techniques that save water. However, little is known about the real extent of water savings at plot scale resulting from change in irrigation application equipment or the adoption of scheduling devices in a given agro-ped...
In this paper, we consider scheduling problems involving resources that must perform complex setup operations between the tasks they realize. To deal with such problems, we introduce a simple yet efficient iterative two-layer decision process that alternates between the fast synthesis of high-level schedules based on a coarse-grain model of setup o...
Many studies had been made on optimization problems related to the maintenance operation works in the railway world. In this paper, we focus on lesser-known type of these problems. Here, the maintenance is already scheduled and the infrastructure manager can only change the train timetables and the routing. This problem is not well treated in the l...
Dans cet article, nous nous intéressons à des problèmes d'ordonnancement dans lesquels les tâches candidates sont hiérarchisées. Nous commençons par définir formellement un cadre de modélisation des problèmes d'ordonnancement hiérarchique. Nous proposons une première traduction de ce cadre vers la programmation par contraintes, ainsi qu'une méthode...
During the last 25 years, the need for computational power aboard aircrafts has been constantly growing. To support these evolutions, aircraft manufacturers need to bring massive computational power aboard in order to host more and more applications of increasing size.The emergence of promising technologies such as many-core processors thus appears...
