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Affichage de 1091 à 1100 sur 5574

  • Communication dans un congrès

Spectral Analysis of LBM-LES Numerical Data on Lid-Driven Cavity

Insaf Mehrez, Ramla Gheith, Fethi Aloui

The lid-driven cavity is an important fluid mechanical system work for as a benchmark for testing numerical methods and for examining fundamental aspects of incompress- ible flows in confined volumes which are driven by the tangential motion of the bounding wall. A numerical study is provided of…

12th International Exergy, Energy and EnvironmentSymposium (IEEES-12), Dec 2020, Doha (en ligne), Qatar. ⟨hal-04161225⟩

  • Thèse

Hybrid Vehicle Design and Control, Conception et commande de véhicules hybrides

Marcelino Sanchez Pantoja

This work is concerned with the development of hybrid electric vehicle technologies. It is split into three main topics : The first topic, covered in Chapter 2, is concerned with the energetic supervisory control that, by taking advantage of the extra degrees of freedom present in a hybrid vehicle,…, La thèse s’intéresse au développement des technologies de véhicules hybrides. Elle comprend trois thèmes principaux : En portant des degrés de liberté supplémentaires du véhicule hybride, la stratégie de gestion ´énergétique répond aux demandes de puissance du conducteur de telle manière que la…

Electric power. Université Polytechnique Hauts-de-France, 2020. English. ⟨NNT : 2020UPHF0036⟩. ⟨tel-03235986⟩

  • Thèse

Caractérisation et modélisation du comportement et de la rupture de thermoplastiques pour une large gamme de vitesse de déformation et de température, Characterization and modeling of the behaviour and the failure of thermoplastics in a wide strain-rate range and temperature

Vincent Dorleans

De nos jours les matériaux polymères sont omniprésents dans l’habitacle d’un véhicule. C’est le cas notamment pour les composants comme la planche de bord ou les panneaux de portes. Ces éléments sont soumis à des cahiers des charges imposés par les réglementations internationales pour minimiser les…, Nowadays, polymers are used for the interior parts of vehicles. It is particularly the case for components such as dashboards and door panels. These elements are submitted to requirements imposed by international regulations in order to minimize the injuries of the passengers in case of a car crash…

Sciences de l'ingénieur [physics]. Université Polytechnique Hauts-de-France; Institut national des sciences appliquées Hauts-de-France, 2020. Français. ⟨NNT : 2020UPHF0031⟩. ⟨tel-03376760⟩

  • Thèse

Parallel machine scheduling problem with a single server, Ordonnancement sur des machines parallèles avec un serveur partagé

Abdelhak El Idrissi

Scheduling is a discipline of combinatorial optimization. It aims to allocate a limited set of resources over time to a set of jobs to be scheduled, with the aim of optimizing one or more criteria (project duration, advances/delays, availability of machines, etc.). Scheduling on parallel machines…, L’ordonnancement est une discipline de l’optimisation combinatoire. Elle vise a` allouer dans le temps un ensemble limité de ressources a` des tâches a` réaliser, avec pour objectif d’optimiser un ou plusieurs critères (durée du projet, avances/retards, disponibilité des machines, etc). L’…

Computer Science [cs]. Université Polytechnique Hauts-de-France; Institut national des sciences appliquées Hauts-de-France; Ecole Mohammadia d'ingénieurs (Rabat, Maroc), 2020. English. ⟨NNT : 2020UPHF0034⟩. ⟨tel-03429508⟩

  • Thèse

Approche multi physique du contact frottant en grande déformation plastique : prédiction numérique du grippage d'alliages d'aluminium en mise en forme à froid, Multiphysics approach of rubbing contact in large plastic strain : numerical prediction of aluminium alloys galling in cold forming

Oussama Filali

La thèse propose une nouvelle approche pour prédire le défaut de grippage rencontré lors de la mise en forme des alliages d’aluminium à froid. De nombreuses études expérimentales montrent que ce défaut de grippage est fortement lié aux conditions de contact et de frottement, et est notamment…, The thesis proposes a new approach to predict the galling defect encountered during cold forming of aluminum alloys. Numerous experimental studies show that this defect is strongly linked to the conditions of contact and friction and is a function of the roughness of the manufacturing tools. Models…

Mécanique des matériaux [physics.class-ph]. Université Polytechnique Hauts-de-France, 2020. Français. ⟨NNT : 2020UPHF0035⟩. ⟨tel-03218161⟩

  • Communication dans un congrès

Avoiding unmeasured premise variables in designing unknown input observers for Takagi-Sugeno fuzzy systems

Tran Anh-Tu Nguyen, Jun-Tao Pan, Thierry-Marie Guerra, Zhenhua Wang

This letter investigates the design of unknown input (UI) observers for a large class of nonlinear systems using Takagi-Sugeno (TS) fuzzy modeling. To avoid the well-known issue on the unmeasured premise variables in fuzzy observer design, we reformulate the nonlinear systems in a TS fuzzy form…

59th IEEE Conference on Decision and Control, Dec 2020, Jeju Island, South Korea. ⟨hal-03408370⟩

  • Communication dans un congrès

A note on non asymptotic stabilization of linear time delay systems

Wilfrid Perruquetti, Nicolás Espitia, Michel Dambrine

This paper deals with fixed-time and prescribedtime stabilization of controllable linear-time delay systems using Artstein's transformation [1]. First, a delayed chain of integrators is stabilized in fixed-time using the desingularization technique originally introduced in [4]. Then,…

59th IEEE Conference on Decision and Control (CDC). December 14-18, 2020., Dec 2020, Jeju Island, South Korea. ⟨hal-03021373⟩

  • Article dans une revue

A framework for detecting and analyzing behavior changes of elderly people over time using learning techniques

Dorsaf Zekri, Thierry Delot, Marie Thilliez, Sylvain Lecomte, Mikael Desertot

A sensor-rich environment can be exploited for elder healthcare applications. In this work, our objective was to conduct a continuous and long-term analysis of elderly’s behavior for detecting changes. We indeed did not study snapshots of the behavior but, rather, analyzed the overall behavior…

Sensors, 2020, 20 (24), pp.1-27. ⟨10.3390/s20247112⟩. ⟨hal-03224413⟩

  • Communication dans un congrès

Pedestrian detection and classification for autonomous train

Ankur Mahtani, Wael Ben Messaoud, Abdelmalik Taleb-Ahmed, Smail Niar, Clément Strauss

In this paper, we present a combined approach for human localization and classification in Autonomous Train application. Our contribution is threefold. (a) The creation of a new dataset for workers wearing orange vests in a railway environment context. (b) A deep learning supervised YOLO object…

IEEE 4th International Conference on Image Processing, Applications and Systems, IPAS 2020, Dec 2020, Genova, Italy. pp.52-57, ⟨10.1109/IPAS50080.2020.9334938⟩. ⟨hal-03138789⟩

  • Article dans une revue

A multiscale topographical analysis based on morphological information: the HEVC multiscale decomposition

Tarek Eseholi, François-Xavier Coudoux, Patrick Corlay, Rahmad Sadli, Maxence Bigerelle

In this paper, we evaluate the effect of scale analysis as well as the filtering process on the performances of an original compressed-domain classifier in the field of material surface topographies classification. Each surface profile is multiscale analyzed by using a Gaussian Filter analyzing…

Materials, 2020, 13 (23), pp.5582. ⟨10.3390/ma13235582⟩. ⟨hal-03321552⟩