Letteratura scientifica selezionata sul tema "Plasma d'arcs"
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Articoli di riviste sul tema "Plasma d'arcs"
Kaminska, A., e M. Dudeck. "Fluctuations de l'arc et du jet de plasma liées au mouvement du pied d'arc dans des plasmatrons". Journal de Physique III 5, n. 12 (dicembre 1995): 2043–57. http://dx.doi.org/10.1051/jp3:1995105.
Testo completoSimonnet, Claire, Pierre Freton, Jean-Jacques Gonzalez, Frank Reichert e Arkadz Petchanka. "Influence de la variation de la charge moyenne dans une simulation numérique d’un arc sous vide en présence d’un AMF". Journal International de Technologie, de l'Innovation, de la Physique, de l'Energie et de l'Environnement 9, n. 1 (29 gennaio 2025). https://doi.org/10.52497/jitipee.v9i1.370.
Testo completoTesi sul tema "Plasma d'arcs"
Delalondre, Clarisse. "Modélisation aérothermodynamique d'arcs électriques à forte intensité avec prise en compte du déséquilibre thermodynamique local et du transfert thermique à la cathode". Rouen, 1990. http://www.theses.fr/1990ROUES004.
Testo completoChouchene, Sarah. "Applications de l’intelligence artificielle à l'étude de la turbulence plasma en fusion nucléaire et aux plasmas d’arc en régime DC". Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0265.
Testo completoThe aim of the work presented in this thesis is to explore the potential contribution of artificial intelligence (AI) image analysis methods to the analysis of videos from various plasma research domains. Two areas are studied: turbulence in nuclear fusion plasmas, and the dynamics of dipolar arcs in the high-voltage DC regime.This thesis mainly explores the application of AI to detect and track macroscopic turbulent structures visible in the form of plasma filaments at the edge of fusion reactors. To this end, AI models are applied to imaging data from the COMPASS tokamak captured by an ultra-fast camera filming up to 1 million frames per second in order to resolve the dynamics of the filaments. Different supervised learning models are employed, after training on labelled datasets to improve detection accuracy, to study the motion of plasma filaments and their interactions with each other. The methods presented in this thesis achieve a detection accuracy of 99 %, and automatically recognise different types of mutual interactions leading to coalescence, splitting or changes in filament trajectories. Comparisons with conventional analysis methods such as detection by segmentation and Kalman filter tracking show that the AI methods tested offer substantial gains in terms of accuracy and analysis speed, while reducing user bias.In the field of dipolar arcs, an unsupervised learning technique is used to detect bubbles of liquid metal forming on the surface of electrodes under high-voltage direct current (HVDC) conditions. The unsupervised models, which are lighter and operate without labelled data, are effective in identifying events that could be similar to anomalies. The results obtained contribute to a better understanding of arc noise, and pave the way for real-time data analysis for the implementation of protection systems.This research demonstrates the relevance of further developing AI methods to advance our understanding of the complex dynamics of nuclear fusion plasmas and arc plasmas. By reducing or eliminating analysis biases linked to human intervention, these methods can also help to improve comparisons between data from different experiments or simulations. The gains in analysis speed are not always very significant, but there are margins for optimisation that open up interesting prospects for improving the control of plasmas, whether cold or nuclear fusion
Megy, Serge. "Diagnostic spectroscopique de plasmas d'arcs transférés". Toulouse 3, 1994. http://www.theses.fr/1994TOU30105.
Testo completoTaupiac, Jean-Pierre. "Incinération de déchets nucléaires en plasma d'arc". Toulouse 3, 1993. http://www.theses.fr/1993TOU30213.
Testo completoMeillot, Erick. "Contribution a l'etude d'un plasma d'arc de vapeur d'eau : application a la gazeification de charbon pulverise en plasma d'arc". Toulouse 3, 1988. http://www.theses.fr/1988TOU30030.
Testo completoMeillot, Erick. "Contribition à l'étude d'un plasma d'arc de vapeur d'eau application à la gazéification de charbon pulvérisé en plasma d'arc /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37616103b.
Testo completoVanhulle, Gabriel. "Étude de la cinétique chimique et des propriétés de transport d'un plasma d'arc SF6-C2F4 en déséquilibre thermique : application à l'étude des disjoncteurs haute tension". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30330/document.
Testo completoModelling a high voltage circuit breaker using a MHD model needs plasma properties databanks to simulate the electric arc behavior. The local thermodynamic equilibrium hypothesis is often used to calculate these properties. However, the equilibrium conditions are not satisfied near the walls or the electrodes, or during the zero crossing of the current. The thermal nonequilibrium considerably modify the chemistry and properties of the plasma. The study of these properties for a 2t plasma is the subject of this thesis. The first part of this thesis presents the industrial context at the origin of this study. Basics assumptions for the 2t hypothesis are then explained. In this section, special attention is given to the temperatures characteristic of the internal energy modes. Two sets of hypotheses concerning these temperatures are used in this work, and the choice of these hypotheses is discussed. The second part of this work is dedicated to the calculation of sf6-c2f4 plasma composition at 2t. This calculation will be done with two different methods: the first is based on the mass action law extended to 2t, and the second on a collisional-radiative calculation. Examples of compositions obtained with these two methods are presented. The hypotheses concerning the temperatures of populating of the internal energy levels are discussed in the light of these results. The third chapter of this thesis deals with the calculation of the thermodynamic properties at 2t of the plasma. The theoretical formulations of each of these properties are first recalled, and the results from these expressions are then presented and discussed, for the two methods of calculating the composition. The fourth chapter is dedicated to calculating the transport coefficients of a sf6-c2f4 plasma at 2t. This part is based on a bibliographic study of the already existing methods of calculation and the essential data to obtain these properties (collision integrals). For each property (viscosity, electrical conductivity and thermal conductivity) the various calculation methods identified in the literature are compared. The choice of the most appropriate calculation technique is made by comparing the results to the ETL. Particular attention is paid to the calculation of the reactive part of the thermal conductivity, and a formulation adapted to the needs of this work is proposed. The results from these expressions are presented and discussed following the same logic when in the previous chapter
Ansar, Syed Asif. "Co-projection d'alumine et d'acier inoxydable par plasma d'arc". Limoges, 2004. http://aurore.unilim.fr/theses/nxfile/default/edabcb4c-cc03-4563-9d24-c7e01e304172/blobholder:0/2004LIMO0047.pdf.
Testo completoThe phenomena influencing plasma sprayed cermet deposits were studied by co-spraying alumina and stainless steel. After optimization of particle injection and spray parameters, the in-flight steel particle oxidation was examined. Formed oxides chemical composition was determined and their formation mechanisms and dependence on spraying conditions were established. The alumina-steel wetting behavior, analyzed by sessile drop method, indicated an improvement due to steel particle oxidation. Optimal splat morphology and flattening of single and co-sprayed particles were obtained on substrates preheated at 573K. The topography modifications, induced by oxide layer on surface of preheated substrates, influenced strongly the splat morphology and flattening. The deposits of stainless steel, alumina and co-sprayed cermets were developed using optimized spraying conditions varying metal and ceramic content. Cermet deposits, composed of 25 wt% alumina-stainless steel having homogeneous phase distribution, demonstrated optimal mechanical properties
Pauvit, Richard. "Etude de la stochasticité d'une torche à plasma d'arc soufflé". Orléans, 1997. http://www.theses.fr/1997ORLE2052.
Testo completoKoalaga, Zacharie. "Contribution a l'etude experimentale et theorique des plasmas d'arcs electriques lamines". Clermont-Ferrand 2, 1991. http://www.theses.fr/1991CLF21343.
Testo completoLibri sul tema "Plasma d'arcs"
Ouajji, Hassan. Etude de propriétés de transport d'un plasma de mélange air-cuivre modélisation de la colonne d'arc. 1986.
Cerca il testo completoCapitoli di libri sul tema "Plasma d'arcs"
Dehaudt et, Ph, e Ph Rochette. "ETUDE PARAMETRIQUE DU PROCEDE DE RECHARGEMENT PAR PLASMA D'ARC TRANSFERE PARAMETRIC STUDY OF PLASMA TRANSFERRED ARC SURFACING". In Advances in Thermal Spraying, 711–18. Elsevier, 1986. http://dx.doi.org/10.1016/b978-0-08-031878-3.50078-2.
Testo completoAtti di convegni sul tema "Plasma d'arcs"
Silvestre García, Laura, Micaela Maisa Montero e Sara Gurrea Moreno. "Proyectos expositivos en la Sala d'Arcs. Análisis de las experiencias en las convocatorias VII y IX". In V Congreso Internacional de Investigacion en Artes Visuales ANIAV 2022. RE/DES Conectar. València: Editorial Universitat Politècnica de València, 2022. http://dx.doi.org/10.4995/aniav2022.2022.15507.
Testo completoAiach, M., M. Roncato, G. Sorin, P. Dezellus e J. N. Fiessinger. "A NEW AT III VARIANT WITH DEFECTIVE PROTEASE BINDING SITE". In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1642941.
Testo completoRamos Caravaca, Carolina. "ZIGZAG ¿Cómo se afronta el reto del turismo de masas desde la arquitectura? (De Platja d'Aro al Mediterráneo)". In Seminario Internacional de Investigación en Urbanismo. Barcelona: Maestría en Planeación Urbana y Regional. Pontificia Universidad Javeriana de Bogotá, 2014. http://dx.doi.org/10.5821/siiu.6027.
Testo completo