Publications

• Article dans une revue

Stabilization of second-order evolution equations with time delay

Serge Nicaise, Cristina Pignotti

We consider second-order evolution equations in an abstract setting with damping and time delay and give sufficient conditions ensuring exponential stability. Our abstract framework is then applied to the wave equation, the elasticity system and the Petrovsky system.

Mathematics of Control, Signals, and Systems, 2014, 26 (4), pp.563-588. ⟨10.1007/s00498-014-0130-1⟩. ⟨hal-03159120⟩

• Article dans une revue

Polynomial stabilization of some dissipative hyperbolic systems

Kaïs Ammari, E. Feireisl, Serge Nicaise

We study the problem of stabilization for the acoustic system with a spatially distributed damping. Imposing various hypotheses on the structural properties of the damping term, we identify either exponential or polynomial decay of solutions with growing time. Exponential decay rate is shown by…

Discrete and Continuous Dynamical Systems - Series A, 2014, 34 (11), pp.4371-4388. ⟨10.3934/dcds.2014.34.4371⟩. ⟨hal-03138443⟩

• Article dans une revue

Exponential stability of abstract evolution equations with time delay

Serge Nicaise, Cristina Pignotti

We consider abstract semilinear evolution equations with a time-delay feedback. We show that, if the C (0)-semigroup describing the linear part of the model is exponentially stable, then the whole system retains this good property when a suitable smallness condition on the time-delay feedback is…

Journal of Evolution Equations, 2014, 15 (1), pp.107-129. ⟨10.1007/s00028-014-0251-5⟩. ⟨hal-03166075⟩

• Chapitre d'ouvrage

Introduction à la théorie des sous- et sur-solutions

Colette De Coster, Jalel Tabka

“Introduction à quelques problèmes d’EDP : notes du groupe de travail de l’équipe EDP du Laboratoire de Mathématiques et leurs Applications de Valenciennes, Ed. Universitaires Européennes, pp.1-41, 2014, 9786131506833. ⟨hal-03142454⟩

• Article dans une revue

Femtosecond X-ray diffraction maps field-driven charge dynamics in ionic crystals

Michael Woerner, Marcel Holtz, Vincent Juvé, Thomas Elsaesser, Andreas Borgschulte

Faraday Discussions, 2014, 171, pp.373 - 392. ⟨10.1039/C4FD00026A⟩. ⟨hal-01912493⟩

• Communication dans un congrès

Energy consumption in reconfigurable mpsoc architecture: Two-level caches optimization oriented approach

Asmaa Bengueddach, Benaoumeur Senouci, Smail Niar, Bouziane Beldjilali

In order to meet the ever-increasing computing requirement in embedded market, multiprocessor chips were proposed as the best way out. In this work we investigate the estimation of the energy consumption in embedded MPSoC system. One of the efficient solutions to reduce the energy consumption is to…

8th IEEE Design and Test Symposium, IDT 2013, Dec 2013, Marrakesh, Morocco. pp.1-6, ⟨10.1109/IDT.2013.6727118⟩. ⟨hal-03612530⟩

• Communication dans un congrès

Compilation optimization exploration for thermal dissipation reduction in embedded systems

Ben Saad Montassar, Ahmed Jedidi, Smail Niar, Mohamed Abid

The ever-increasing transistor integration density has allowed to design complex and powerful system-on-chips (SoC). As a consequence, the power density also increased significantly in the SoC, as well as, the accompanying heat. These two results have a negative impact on the performance of the SoC…

2013 Design and Test Symposium (IDT), Dec 2013, Marrakesh, Morocco. pp.1-3, ⟨10.1109/IDT.2013.6727121⟩. ⟨hal-03612489⟩

• Communication dans un congrès

Run-time users/applications interaction analysis for power consumption optimization

Olivier Carlier, Jamel Tayeb, Mikael Desertot, Sylvain Lecomte, Smail Niar

Personal and mobile computing systems represents nowadays one of the biggest market segment and fastest adopted products. The importance of saving power for these handheld devices is critical. The benefits are increasing battery life and system reliability. In these systems, power not only goes to…

2013 Fourth Annual International Conference on Energy Aware Computing Systems and Applications (ICEAC), Dec 2013, Istanbul, Turkey. pp.181-186, ⟨10.1109/ICEAC.2013.6737660⟩. ⟨hal-03472841⟩

• Communication dans un congrès

Efficient FPGA implementation of H.264 CAVLC entropy decoder

Ali Siblini, Elias Michel Baaklini, Hassan Sbeity, Ahmad Fadlallah, Smail Niar

Multiprocessor-system-on-a-chip (MPSoC) is the dominating architecture in embedded systems. Applications need to be multi-threaded to benefit from the concurrency provided by the MPSoC. Many parallel versions of the new emerging H.264/AVC [1] already exist. However, providing a full parallel H.264…

2013 Design and Test Symposium (IDT), Dec 2013, Marrakesh, Morocco. pp.1-3, ⟨10.1109/IDT.2013.6727116⟩. ⟨hal-03472887⟩

• Communication dans un congrès

Experimental Study of Heat Transfer Inside a Gamma Stirling Engine Regenerator During Quasi-Steady Operation

Ramla Gheith, Fethi Aloui, Sassi Ben Nasrallah

The Stirling engine is a renewable way to confront the lack of fossil energy over the word, to reduce the pollution and to use a free way of energy. Actually, these engines are used to produce electricity, to pump water, etc. Unfortunately, this type of engine is the seat of several thermal and…

ASME 2013 Fluids Engineering Division Summer Meeting, Jul 2013, Nevada, United States. 7 p., ⟨10.1115/FEDSM2013-16311⟩. ⟨hal-04163448⟩