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Model Predictive Control for Discrete and Continuous Timed Petri Nets

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International Journal of Automation and computing 2018年第1期15卷 25-38页

作者： Marwa Taleb Edouard leclercq Dimitri lefebvre Laboratory GREAH University of Le Havre

The goal of this paper is to propose a unique control method that permits the evolution of both timed continuous Petri net （TCPN） and T-timed discrete Petri net （T-TDPN） from an initial state to a desired one. Model predictive control （MPC） is a robust control scheme against perturbation and a consistent real-time constraints method. Hence, the proposed approach is studied using the MPC. However, the computational complexity may prevent the use of the MPC for large systems and for large prediction horizons. Then, the proposed approach provides some new techniques in order to reduce the high computational complexity; among them one is taking constant control actions during the prediction.

关键词： Model predictive control timed continuous Petri net (TCPN) T-timed discrete Petri net (T-TDPN) fluidification optimization constant control.

A new piecewise linear Chen system of fractional-order:Numerical approximation of stable attractors

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Chinese Physics B 2015年第6期24卷 216-224页

作者： Marius-F.Danca M.A.Aziz-Alaoui Michael Small Department of Mathematics and Computer Science Emanuel University of Oradea Romanian Institute of Science and Technology normandie university ULH LMAHF-76600 Le Havre FR CNRS 3335 ISCN25 rue Philippe Lebon 76600 Le HavreFrance School of Mathematics and Statistics University of Western Australia

In this paper we present a new version of Chen＇s system： a piecewise linear （PWL） Chert system of fractional-order. Via a sigmoid-like function, the discontinuous system is transformed into a continuous system. By numerical simulations, we reveal chaotic behaviors and also multistability, i.e., the existence of small pararheter windows where, for some fixed bifurcation parameter and depending on initial conditions, coexistence of stable attractors and chaotic attractors is possible. Moreover, we show that by using an algorithm to switch the bifurcation parameter, the stable attractors can be numerically approximated.

关键词： PWL Chen attractor of fractional-order parameter switching Cellina's Theorem Filippov regu-larization Sigmoid function bifurcation diagram

Novel criteria for exponential synchronization of inner time-varying complex networks with coupling delay

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Chinese Physics B 2012年第4期21卷 145-150页

作者：张群娇赵军产 College of Mathematics and Computer Science Wuhan Textile UniversityWuhan 430073China Laboratoire de Mathématiques Appliquées Universitédu HavreLe Havre Cedex76058France

This paper mainly investigates the exponential synchronization of an inner time-varying complex network with coupling delay. Firstly, the synchronization of complex networks is decoupled into the stability of the corresponding dynamical systems. Based on the Lyapunov function theory, some sufficient conditions to guarantee its stability with any given convergence rate are derived, thus the synchronization of the networks is achieved. Finally, the results are illustrated by a simple time-varying network model with a coupling delay. All involved numerical simulations verify the correctness of the theoretical analysis.

关键词： exponential synchronization time varying complex network coupling delay

Introduction to Mesh Based Generated Lumped Parameter Models for Electromagnetic Problems

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CES Transactions on Electrical Machines and Systems 2021年第2期5卷 152-162页

作者： Shuo Yang Salim Asfirane Sami Hlioui Smail Mezani Guillaume Krebs Yacine Amara Georges Barakat Mohamed Gabsi Wei Hua Southeast university NanjingChina universitéle havre normandie Conservatoire national des arts et métiers universitéde Lorraine universitéParis-Saclay Facultédes Sciences d'Orsay ENS Paris-Saclay

This paper is an introduction to mesh based generated reluctance network *** overview of scientific works which led to the development of this approach is first *** concepts of the approach are then presented in the case of electromagnetic devices.A step-by-step procedure for coding the approach in the case of a flat linear permanent magnet machine is *** developed under MATLAB and Scilab environments are also included.

关键词： Lumped parameter modeling finite element method mesh electromagnetic devices modeling

Porous media grain size distribution and hydrodynamic forces effects on transport and deposition of suspended particles

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Journal of Environmental Sciences 2017年第3期29卷 161-172页

作者： Nasre-Dine Ahfir Ahmed Hammadi Abdellah Alem HuaQing Wang Gilbert le Bras Tariq Ouahbi normandie university UNIHAVREUMR 6294 CNRSLOMC76600 Le HavreFrance GeM UMR 6183 CNRSUniuersite de NantesBP 42044606 Saint Nazaire CedexFrance

The effects of porous media grain size distribution on the transport and deposition of polydisperse suspended particles under different flow velocities were investigated. Selected Kaolinite particles （2-30 μm） and Fluorescein （dissolved tracer） were injected in the porous media by step input injection technique. Three sands filled columns were used： Fine sand, Coarse sand, and a third sand （Mixture） obtained by mixing the two last sands in equal weight proportion. The porous media performance on the particle removal was evaluated by analysing particles breakthrough curves, hydro-dispersive parameters determined using the analytical solution of convection-dispersion equation with a first order deposition kinetics, particles deposition profiles, and particle-size distribution of the recovered and the deposited particles. The deposition kinetics and the longitudinal hydrodynamic dispersion coefficients are controlled by the porous media grain size distribution. Mixture sand is more dispersive than Fine and Coarse sands. More the uniformity coefficient of the porous medium is large, higher is the filtration efficiency. At low velocities, porous media capture all sizes of suspended particles injected with larger ones mainly captured at the entrance. A high flow velocity carries the particles deeper into the porous media, producing more gradual changes in the deposition profile. The median diameter of the deposited particles at different depth increases with flow velocity. The large grain size distribution leads to build narrow pores enhancing the deposition of the particles by straining.

关键词： Suspended particlesPorous mediaGrain size distributionStructured heterogeneityStrainingParticle size distribution

Evolution of a Holocene banner bank controlled by morphodynamics and structural setting of a macrotidal coast: Saint-Brieuc Bay (NW-Europe)

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Geoscience Frontiers 2021年第5期12卷 166-181页

作者： Kalil Traoréa David Menier Erwan Gensac Pascal le Roy Clément Lambert Paul Bessin Kevin Pedoja Anne Duperret Romain le Gall Laboratoire Géoscience Océan UMR 6538CNRSUniversitéBretagne SudCampus de Tohannic56000 VannesFrance Laboratoire Géoscience Océan UMR 6538CNRSIUEMUniversitéBretagne Occidentale29280 PlouzanéFrance Laboratoire de Planétologie et Géodynamique UMR 6112CNRSLe Mans UniversitéAvenue Olivier Messiaen72085 Le Mans CEDEX 9France Laboratoire Morphodynamique Continentale et Côtière UMR 6143CNRSUniversitéCaen Normandiecampus 12-4Rue des Tilleuls14000 Caen cedexFrance Laboratoire Ondes et Milieux Complexes UMR 6294CNRSUniversitéLe Havre Normandie53 rue de PronyCS8054076058 Le Havre cedexFrance

The morphology and internal structure of the Horaine Bank(Bay of Saint-Brieuc,NW France)are described based on multibeam echosounder and high-resolution seismic datasets coupled with vibro-core *** Horaine Bank shows large-scale bedforms in the lee of a submerged rocky shoal,which allowed defining it as a Banner *** internal structure of the sandbank reveals four seismic units(U1-U4)on a Cambrian basement(U0).The basal unit U1 is interpreted as reworked lowstand fluvial sediments those infilled micro incised valleys during a rise in sea *** unit is overlain by paleo-coastal barrier sand-spit(U2)whose development was controlled by swell in the context of a rapid rise in sea *** successive prograding unit(U3)is interpreted as flooding deposits in continuity with unit *** unit U4 is characterized by oblique reflectors oriented in two opposite *** last unit,dated post 3500 yr BP,corresponds to migrating dunes superimposed on the bank and observable in the high-resolution bathymetric *** strong correlation between tidal currents and the apparent clockwise migration of dune crests suggests the presence of a tidal gyre controlling the present-day dynamics of most of the Horaine bank *** study proposes a new model for the construction of banner banks characterized by the gradual transition of a sand spit to a banner bank during marine transgression and ensuing hydrodynamic variability.

关键词： Sand banks Banner bank Holocene climate Geomorphology Sea level rise Tidal gyre

THE PORT OF le havre AUTHOR-ITY GRANTED ISO9001 QUALITY CERTIFICATION FOR CONTAINER OPERATION

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中国远洋海运 2003年第3期 62-63页

作者： Port of le havre Authority Port of le havre Authority

The French Quality Assurance As sociation (AFAQ) has just granted ISO9001 certification to the Port of le havre Authority for the management system of quality for the driving and maintenance of Port equipment dedicated to container trade. After four days’ auditing in December 2002, the file was submitted to the ’Transport and Logistics’ certification Committee of AFAQ which decided and recognised that

关键词： ISO of in as THE PORT OF le havre AUTHOR-ITY GRANTED ISO9001 QUALITY CERTIFICATION FOR CONTAINER OPERATION for that MT PAH

A Systematic Design of Emulators for Multivariable Non Square and Nonlinear Systems

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International Journal of Automation and computing 2017年第6期14卷 742-754页

作者： Nesrine Bahri Asma Atig Ridha Ben Abdennour Fabrice Druaux Dimitri lefebvre university of Gabes National School of Engineers of Gabes-TunisiaStreet Omar Ibn Khattab 6029Gabes university of havre 25 Rue Philippe Lebon76600 Le HavreFrance

In this paper, multimodel and neural emulators are proposed for uncoupled multivariable nonlinear plants with unknown dynamics. The contributions of this paper are to extend the emulators to multivariable non square systems and to propose a systematic method to compute the multimodel synthesis parameters. The effectiveness of the proposed emulators is shown through two simulation examples. The obtained results are very satisfactory, they illustrate the performance of both emulators and show the advantages of the multimodel emulator relatively to the neural one.

关键词： Uncoupled multimodel neural networks emulation multivariable nonlinear systems parameters estimation

Stable Adaptive Neural Control of a Robot Arm

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Intelligent Control and Automation 2012年第2期3卷 140-145页

作者： Salem Zerkaoui Saeed M. Badran Al Baha university Al Baha Saudi Arabia université le havre—GREAH Lebon Le Havre France

In this paper, stable indirect adaptive control with recurrent neural networks (RNN) is presented for square multivariable non-linear plants with unknown dynamics. The control scheme is made of an adaptive instantaneous neural model, a neural controller based on fully connected “Real-Time Recurrent learning” (RTRL) networks and an online parameters updating law. Closed-loop performances as well as sufficient conditions for asymptotic stability are derived from the Lyapunov approach according to the adaptive updating rate parameter. Robustness is also considered in terms of sensor noise and model uncertainties. This control scheme is applied to the manipulator robot process in order to illustrate the efficiency of the proposed method for real-world control problems.

关键词： Adaptive Control Neural Networks Multivariable Systems Stability Robustness Lyapunov Function Manipulator Robot