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Affichage de 1051 à 1060 sur 5526

  • THESE

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⟩

  • COMM

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⟩

  • COMM

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⟩

  • ART

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⟩

  • COMM

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⟩

  • ART

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⟩

  • COMM

Prediction of Risk Factors for Fall using Bayesian Networks with Partial Health Information

Gulshan Sihag, Véronique Delcroix, Emmanuelle Grislin-Le Strugeon, Xavier Siebert, Sylvain Piechowiak, François Puisieux

Falls are frequent in the elderly and it is the number one cause of traumatic death in this population. Fall prevention requires to evaluate which risk factors for fall are present for a person on the basis of incomplete health data. In this context, the main objective of this paper is to identify...

2020 IEEE Globecom Workshops (GC Wkshps), Dec 2020, Taipei, Taiwan. pp.1-6, ⟨10.1109/GCWkshps50303.2020.9367534⟩. ⟨hal-03381859⟩

  • COMM

Performance et Ethique : Deux concepts qui se rejoignent ?

Lamia Berrah, Vincent Clivillé, Damien Trentesaux

Une discussion sur la relation entre éthique et performance industrielle.

Journées STP du GDR MACS, Dec 2020, Cluny en Bourgogne, France. ⟨hal-03423888⟩

  • ART

Etude expérimentale des échanges de chaleur pariétaux dans un refroidisseur d’air suralimenté d’un moteur à combustion interne, Experimental study of wall heat transfers in an intercooler of an internal combustion engine

Maximilien Blanc, François Delcourt, Eric Delacourt, Céline Morin, David Chalet

Des mesures par thermocouples et thermographie infrarouge sont réalisées sur le refroidisseur d’air suralimenté d’un moteur à allumage commandé (cylindrée : 1,2 L, taux de compression : 10,5:1, puissance : 95,6 kW) pour plusieurs points de fonctionnement moteur. Une méthode de calcul est développée..., Experimental measurements by thermocouples and infrared thermography are made in the intercooler of a supercharged spark-ignition engine (engine displacement: 1.2L, compression ratio: 10.5:1, power: 95.6kW) for several engine operating points. A calculation method is developed to define locally the...

Entropie : thermodynamique – énergie – environnement – économie, 2020, 20 (3), ⟨10.21494/ISTE.OP.2020.0576⟩. ⟨hal-03133898⟩

  • COMM

A Generic Architecture to Design Cyber-Physical and Human Systems

Thierry Berger, Yves Sallez, Antoine Dequidt, Damien Trentesaux

Although Cyber Physical Systems are widely implemented in many areas, model architecture for Human and CPS remains insufficiently studied. In this paper, a generic model is proposed to describe the architecture of a Cyber-Physical & Human System. This model deals respectively with the cognitive...

CPHS2020 3rd IFAC Workshop on Cyber-Physical & Human Systems, Dec 2020, Beijing, China. pp.344-349, ⟨10.1016/j.ifacol.2021.04.111⟩. ⟨hal-03053285⟩