Jacques Sau

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Real-time estimation and short-term prediction of traffic conditions is one of major concern of traffic managers and ITS-oriented systems. Model-based methods appear now as very promising ways in order to reach this purpose. Such methods are already used in process control (Kalman filtering, Luenberger observers). In the application presented in this paper,(More)
UNLABELLED Because of the limited number of projections, the mathematic reconstruction formula of the filtered backprojection (FBP) algorithm may create an artifact that streaks reconstructed images. This artifact can be imperfectly removed by replacing the ramp filter of the FBP with an ad hoc low-pass filter, the cost being the loss of contrast and(More)
The probability hypothesis density (PHD) methodology is widely used by the research community for the purposes of multiple object tracking. This problem consists in the recursive state estimation of several targets by using the information coming from an observation process. The purpose of this paper is to investigate the potential of the PHD filters for(More)
  • J C Pagb, J M Compas, J Sau
  • 1998
The study of hydraulic structures makes systematic use of mathematical models in order to verify their behaviour. On-line use of these models to synthesise predictive control permits basing control on almost perfect knowledge of every aspect of the process. Achieving this aim requires good management of the embedded numeric model and the incorporation of an(More)
Assimilation de données appliquée à l'estimation de l'état hydraulique d'un aménagement hydroélectrique du Rhône 2 ABSTRACT Ensure the safety of development projects of the Rhône is the priority of the Compagnie Nationale du Rhône. That means it is essential to respect the water levels at some set points along the river. To regulate its development(More)
Scarcity of water resource and increasing competition for its use promoted recently the development of advanced control algorithms and SCADA technologies for the automatic management of open-surface hydraulic systems. In order to control hydraulic devices on irrigation canals or rivers, detailed information on the hydraulic state of the system must be(More)
In this thesis, I explore lattice independent duality and systems to which it can be applied. I first demonstrate classical duality on models in an external field, including the Ising, Potts, and x − y models, showing in particular how this modifies duality to be lattice independent and applicable to networks. I then present a novel application of duality(More)