Search results for "Simulation"

showing 10 items of 5095 documents

Land use simulation: statistical analysis approaches to calibrate cellular automata

2015

International audience

[SHS.GEO] Humanities and Social Sciences/Geographycellular automata[SHS.GEO]Humanities and Social Sciences/GeographyLand use simulationComputingMilieux_MISCELLANEOUS[ SHS.GEO ] Humanities and Social Sciences/Geography
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SYSTEM DYNAMICS VERSUS CELLULAR AUTOMATA IN MODELLING PANIC SITUATIONS

2008

International audience; In this paper we face system dynamics modelling and cellular automata to model panic processes. We compare both models using phase plans. The results of simulation confirm our hypotheses: First, a collective behaviour is not the arithmetical sum of the individual behaviours. Secondly the crowd causes the emergence of collective panic from individual panic. Both types of methodology produce the emergence of panic and identical curves for different values of initial conditions and parameters. But the effects of thresholds vary according to these values.

[SHS.GEO] Humanities and Social Sciences/Geographycellular automatapanicemergencesystem dynamics modelling[SHS.GEO]Humanities and Social Sciences/Geographysimulation[ SHS.GEO ] Humanities and Social Sciences/Geography
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Création de champs de potentiel et simulation d'itinéraires à partir de l'enquête ménages-déplacement

2008

[SHS.GEO] Humanities and Social Sciences/Geographyenquête ménages-déplacement[SHS.GEO]Humanities and Social Sciences/Geographychamps de potentielsimulationitinéraires[ SHS.GEO ] Humanities and Social Sciences/Geography
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Pour une approche normative de l’aménagement. Simulation de scénarios de développement résidentiel au Luxembourg

2015

National audience; L’objectif de cette communication est de présenter les résultats obtenus dans le cadre d’un travail de thèse (projet COSMELUX, financé par le Fond National de la Recherche du Luxembourg, 2010-2014) dont l’objectif est de proposer et d’évaluer différents scénarios de croissance résidentielle sur le Grand-Duché du Luxembourg à l’horizon 2030. Les simulations de développement résidentiel ont été réalisées avec l’application MUP-City (Tannier et al., 2012). Les scénarios simulés ont d’abord été évalués au moyen de mesures d’accessibilité spatiale (distance minimale pour atteindre l’aménité la plus proche, nombre d’aménités à une distance donnée, indicateurs de diversité de l’…

[SHS.GEO] Humanities and Social Sciences/Geographysimulation spatialecroissance résidentielleaménagement normatif[SHS.GEO]Humanities and Social Sciences/Geographymodèles de villescénarios[ SHS.GEO ] Humanities and Social Sciences/Geography
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Effet des messages de sécurité routière sur la détection des cyclistes par les automobilistes dans un environnement dynamique : implication des proce…

2018

The aim of the present project is to provide a better understanding of how safety messages can control drivers' vulnerable road user detection abilities. Safety messages provide both vulnerability information and elicit emotion with persons that are exposed to it. This thesis deals with how vulnerability information and emotions respectively affect vulnerable road user detection performances. A special focus was placed on cyclists because of the lack of studies that address cyclist detetcion issues. The project also focused on physiology, especially emotion identification through physiological patterns.

[SHS.PSY] Humanities and Social Sciences/PsychologyEmotionPhysiologyDriving simulationConduite simulée[SHS.PSY]Humanities and Social Sciences/PsychologyAttentionPreventive communicationPhysiologieCommunication préventive
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Modèle global et paramétrable, pour la gestion des foules d'agents en animation comportementale

2011

The realism of crowd behavioral animation is based on one hand on a rendering of graphic scenes generated by the application, and on the other hand on the realism of the behavior. This is last point which is our object of study. The realism of crowds' behavior is essentially global (macroscopic realism). It must respect the required statistical characteristics of the crowd (density, dispersal, speed…) similar to those of a real crowd. The realism is also local (microscopic realism), i.e. agents should ideally behave like humans or human groups taken as reference, at least in the focus of the considered application. The aim of our research is to propose a generic model to perform crowd behav…

[SHS.SOCIO]Humanities and Social Sciences/SociologyCrowd behavioral simulationContextesRéalisme macroscopique et microscopiqueSimulation comportementale de foules[SHS.SOCIO] Humanities and Social Sciences/SociologyMacroscopic and microscopic realismContexts[ INFO.INFO-OH ] Computer Science [cs]/Other [cs.OH][ SHS.SOCIO ] Humanities and Social Sciences/SociologyAttributs de caractèreCharacter attributes
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Ville et mobilité durable : une évaluation par la simulation

2013

International audience; Depuis les publications de Newman et Kenworthy (1989) sur la consommation énergétique induite par les déplacements, un débat controversé s'est installé à propos des stratégies de transport et de développement urbains. De nombreux auteurs ont pointé du doigt l'étalement urbain et proposé une ville compacte et dense, mettant en avant le fait qu'elle (i) favorise l'utilisation des transports publics, (ii) permet une bonne accessibilité aux commerces et services et (iii) réduit la ségrégation sociale (Dantzig et Saaty, 1973). D'autres (Banister, 1992 ; Breheny, 1992, 1997 ; Owens, 1992) ont par contre émit des doutes sur l'efficacité de ces politiques en montrant que la …

[SHS.STAT]Humanities and Social Sciences/Methods and statistics[SHS.GEO] Humanities and Social Sciences/Geographyaide à la décision[SHS.STAT] Humanities and Social Sciences/Methods and statisticspolitique de transport[SHS.GEO]Humanities and Social Sciences/Geographyforme urbainesimulation[ SHS.STAT ] Humanities and Social Sciences/Methods and statisticsmodélisation[ SHS.GEO ] Humanities and Social Sciences/Geography
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Entangled photons through thick scattering media: experiments and comparison with simulations of the biphoton wave function

2021

International audience; We report experimentally and numerically quantum correlations imaging through thick random media. We demonstrated that spatial correlations between twin photon are still detected but no in form of two-photon speckle-like patterns.

[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]Physics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]PhotonComputer simulationScatteringPhysics::OpticsRandom mediaQuantum entanglement[SPI.MAT]Engineering Sciences [physics]/MaterialsPhoton entanglementQuantum mechanics[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/MicroelectronicsWave functionQuantum2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
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The mKdV equation and multi-parameters rational solutions

2021

Abstract N -order solutions to the modified Korteweg–de Vries (mKdV) equation are given in terms of a quotient of two wronskians of order N depending on 2 N real parameters. When one of these parameters goes to 0, we succeed to get for each positive integer N , rational solutions as a quotient of polynomials in x and t depending on 2 N real parameters. We construct explicit expressions of these rational solutions for orders N = 1 until N = 6 .

[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph][PHYS]Physics [physics]Pure mathematicsApplied MathematicsRational solutionsGeneral Physics and Astronomy[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]01 natural sciences010305 fluids & plasmasComputational MathematicsNonlinear Sciences::Exactly Solvable and Integrable SystemsIntegerWronskiansModeling and Simulation0103 physical sciencesOrder (group theory)mKdV equation010301 acousticsQuotientMathematicsWave Motion
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Contribution to the study of interaction between residual stress and oxygen diffusion in a deformable and reactive solid

2011

The aim of this PhD work is to highlight the interactions between the mechanical stress and the chemical composition within diffusion of matter process for a reactive solid. The chronological evolution of our work goes from a parametric numerical study to an experimental study and reveals the role of mechanical stresses on the oxygen diffusion process.Different origins of mechanical stress were first numerically analysed from the point of view of their impacts on the process of oxygen diffusion into a metal (Zr) or a ceramic (UO2) subjected to an oxidizing environment. This approach allowed us: to identify a surface treatment (shot-peening) able to generate a residual specific stress field,…

[SPI.OTHER]Engineering Sciences [physics]/OtherContraintes résiduelles[ SPI.OTHER ] Engineering Sciences [physics]/Other[SPI.OTHER] Engineering Sciences [physics]/OtherDiffusion de matièreNo english keywordCouplage diffusion – contraintes[CHIM.OTHE] Chemical Sciences/Other[ CHIM.OTHE ] Chemical Sciences/OtherZirconiumOxydationTraitements de surface[CHIM.OTHE]Chemical Sciences/OtherMorphologie d'interfaceGrenaillageSimulations numériques
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