Letteratura scientifica selezionata sul tema "Espace de recherche étendu"
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Articoli di riviste sul tema "Espace de recherche étendu"
Bidaud, Éric. "Vers une psychanalyse du paysage". psychologie clinique, n. 47 (2019): 116–28. http://dx.doi.org/10.1051/psyc/201947116.
Testo completoMaroteaux, Vincent. "Les forêts péri-urbaines, milieu de loisir : le cas de la région parisienne à l'époque moderne et contemporaine". Hors-collection des Cahiers de Fontenay 9, n. 1 (1991): 91–107. http://dx.doi.org/10.3406/cafon.1991.915.
Testo completoBadescu, Sanda. "Espace fermé, espace ouvert : Proust à la recherche du familier". L’espace à travers l’imaginaire littéraire, n. 122 (13 luglio 2023): 21–30. http://dx.doi.org/10.7202/1101618ar.
Testo completoHamisultane, Sophie. "Sociologie clinique et approche anti-oppressive : approfondir les réflexions sur la posture de recherche en travail social dans un contexte d’interculturalité au Canada." Clinical Sociology Review 17, n. 1 (28 dicembre 2022): 83–104. http://dx.doi.org/10.36615/csr.v17i1.1340.
Testo completoDuchastel, Jules, e Danielle Laberge. "La recherche comme espace de médiation interdisciplinaire". Sociologie et sociétés 31, n. 1 (2 ottobre 2002): 63–76. http://dx.doi.org/10.7202/001205ar.
Testo completoDumont, Luc. "Il faut sauver un espace de recherche". �tudes th��trales N�63-64, n. 2 (2015): 50. http://dx.doi.org/10.3917/etth.063.0050.
Testo completoHartmann, Sascha, Bruno Cailler e Christel Taillibert. "Entretien avec Sascha Hartmann, chargée de programmes numériques au sein de l’Unité Créations numériques d’ARTE France". Télévision N° 15, n. 1 (23 maggio 2024): 149–57. http://dx.doi.org/10.3917/telev.015.0149.
Testo completoCailler, Bruno, e Christel Taillibert. "Sérialisation, sérialités : penser la production numérique du groupe ARTE". Télévision N° 15, n. 1 (23 maggio 2024): 67–82. http://dx.doi.org/10.3917/telev.015.0067.
Testo completoAnne, DIZERBO. "Relation aux sujets en recherche biographique en éducation". Revista Portuguesa de Educação 33, n. 2 (30 dicembre 2020): 244–60. http://dx.doi.org/10.21814/rpe.19731.
Testo completoSauvin, Alain, Daniel Dind e Michel Vuille. "Recherche-action et travail social". La recherche-action : enjeux et pratiques, n. 5 (29 gennaio 2016): 58–73. http://dx.doi.org/10.7202/1034878ar.
Testo completoTesi sul tema "Espace de recherche étendu"
Mamfoumbi, Ozoumet Frichnel W. "Inversion de formes d'ondes complètes dans le domaine fréquentiel en se basant sur un espace de recherche étendu : comprendre les limites". Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5008.
Testo completoFull Waveform Inversion (FWI) has become the cornerstone of seismic imaging workflows in exploration geophysics. FWI is a non destructive imaging device that estimates properties of a medium from waves. Mathematically, FWI is an inverse scattering problem formulated as a constrained data fitting problem for the estimation of the parameters contained in the coefficients of the wave equation constraint. FWI is generally solved with iterative local optimization methods due to the size of the data and parameter spaces. As solving FWI with the method of Lagrange multipliers is expensive, the full search space is classically projected onto the parameter space by variable projection leading to a highly nonlinear problem. This nonlinearity results from the single-scattering Born approximation with which partial derivative data simulate the measured scattered data or data residuals. This approximation requires to satisfy the cycle skipping criterion, that is the simulated data should predict the recorded data with phase errors less than pi. This thesis deals with the wavefield reconstruction inversion (WRI) method, which extends the linear regime of FWI by reconstructing wavefields that are closer to the true wavefields and match the observables without cycle skipping. To this end, wavefields are computed in the initial medium with extended sources given by the sum of the experimental sources and an approximation of the volume sources that would generate the scattered fields by the sought model perturbation at the current iteration. The volume sources are estimated by solving an upstream scattered-data fitting problem before pushing the parameters towards the true ones by minimizing the source extensions. This thesis first provides an update overview of these principles. The optimization problem is formulated with the alternating-direction method of multipliers (ADMM) where the wavefields, the parameters and the Lagrange multipliers are updated with alternating directions and nonsmooth regularization is implemented with proximal algorithms. Then, the behavior of WRI are illustrated with synthetic benchmarks. The first illustrates how WRI manages cycle skipping with a full-aperture circular acquisition. Then, a surface acquisition illustrates how WRI reconstructs progressively the medium from shallow to deep areas. This results because the wavefields are computed by backward/forward propagation of the data residuals from the receivers in the inaccurate background medium. Then, the benefit of long-offset acquisition to perform well-posed WRI while avoiding cycle skipping is shown. The fourth test illustrates the sensitivity of WRI to the penalty parameter controling the relative weight of the data and source misfit functions and compare the results of WRI and FWI. Then, the role of sparsity-promoting regularization to reconstruct complex media containing salt bodies is illustrated. Finally, WRI is assessed at the regional scale where the size of the domains leads to hundred of propagated wavelengths and the inversion is stabilized with weighting operator in the source misfit function. Finally, WRI is assessed with a 2D real dataset from the OBN Gorgon survey, Australia. Although the results were impeded by the 2D configuration, the ability of WRI to match arbitrarily well the data is shown while WRI outperforms FWI as highlighted by a better match of well logs and sharper reconstruction of the Gorgon horst at reservoir levels. Perspectives are the efficient numerical implementation of WRI allowing for application on 3D real data to refine the conclusions drawn from this first real data application
Guo, Gaoshan. "Inversion de la forme d'onde complète à source étendue dans le domaine temporel : théorie, algorithme et application". Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5014.
Testo completoFull waveform inversion (FWI) has emerged as the baseline seismic imaging method in exploration geophysics. Given the size of the data and model spaces, FWI relies on iterative local optimization methods and reduced search space where the wave equation is strictly satisfied at each iteration. This framework requires an accurate initial model allowing for the simulated data to match the recorded data with kinematic errors less than half the period to avoid cycle skipping. To mitigate cycle skipping, several variants of FWI have been developed over the last decade such as extended-space FWI where degrees of freedom are added to the forward problem. Among them, the wavefield reconstruction inversion (WRI) implements the wave equation as a soft constraint to match the data by combining a wave-equation relaxation with data assimilation. While WRI has been initially implemented in the frequency domain where the data-assimilated wavefields can be computed with linear algebra methods, the time-domain implementation with explicit time-marching schemes has proven challenging. It was recently recognized that the source extensions generated by the wave-equation relaxation are the least-squares solutions of the scattered-data fitting problem. As such, they are computed by backward modeling of deconvolved FWI data residuals by the data-domain Hessian. This reformulation of the wavefield reconstruction as a scattering source reconstruction has led to the extended-source FWI (ES-FWI).In this thesis, I develop a practical algorithm for ES-FWI. Firstly, I focus on the efficient computation of the source extensions where the deconvolution of the data residuals by the data-domain Hessian is the main computational bottleneck. Previous studies implement the Hessian with a scaled identity matrix, which is acceptable in certain favorable scenarios but prone to failure in complex media. I propose a more accurate approximation of the inverse Hessian with various matching filters such as 1D/2D Wiener and Gabor filters. Numerical tests conducted on the Marmousi II model show the relevance of these approximations. Moreover, the data-assimilated wavefields primarily consist of the ‘migration/demigration' of the recorded data. Accordingly, their accuracy diminishes away from the receivers, which can drive the inversion towards spurious minima in particular when surface multiples are involved in the inversion. To address this issue, I design a weighting operator based on time-offset windowing in the data misfit function to inject progressively more complex data in the inversion and reconstruct the medium from the shallow parts to the deep ones. The application of the BPsalt model illustrates the relevance of this layer-stripping scheme in a very challenging context.ES-FWI can be recast as a generalized FWI, where the data misfit function is weighted by the inverse data-domain Hessian of the source extension problem. This leads to a decomposition of the Gauss-Newton (GN) Hessian into a diagonal source-side Hessian and source-dependent receiver-side data-domain Hessians. I use this decomposition to propose a computationally efficient approximation of the GN Hessian. I approximate the inverse Hessian with 2D Gabor matching filters, which can be readily used as an approximation of the GN Hessian or as a preconditioner for the quasi-Newton method. Numerical tests demonstrate the improved convergence speed of FWI provided by this Hessian.Finally, I extend the application of the data-assimilated wavefield reconstruction towards seismic redatuming, where highly-accurate wavefield reconstruction is necessary. This prompts me to use the iterative solver to perform the deconvolution of the scattered data. Using reciprocity, I can chain source and receiver redatuming. Numerical tests and application to ocean-bottom seismic data validate the effectiveness of the proposed method
Alkanjo, Hasan. "Spectre étendu des opérateurs et applications". Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10271/document.
Testo completoThis thesis is based on a relatively new spectral notion, called extended spectrum of operators. In the first part, we provide general properties of extended spectrum of an operator in some special cases, such as the case of finite dimension and the case of invertible operator. We focused in the second part on characterizing the extended spectrum of truncated shift operator Su. In particular, we give a complete description of the extended eigenvectors associated to each extended eigenvalue of Sb, where b is a Blaschke product. In the third part, we describe the extended spectrum and the extended eigenvectors of a very important class of operators , that is the normal operators. We first start by describing these last sets for the product of a positive and a self-adjoint operator which are both injective. After, we use the Fuglede-Putnam theorem to describe the same sets for normal operators, in terms of their spectral measure. In the last part, we apply our results from the last three parts on concrete examples. In particular, we address the problem of extended eigenvectors of operators defined in a finite dimension space. Next, we show the existence of a quasinilpotent compact operator whose extended spectrum is reduced to {1}. Finally, we study two Cesaro operators which are very important in applications
Idrissi, Fakhr-Eddine Abdellah. "Recherche d'un effet de violation de parité dans l'interaction neutron-proton". Grenoble 1, 1986. http://www.theses.fr/1986GRE10066.
Testo completoMartin, Nathalie. "Exploration d'un espace de perceptions et d'un espace de preferences. Recherche d'optima en formulation sensorielle". Massy, ENSIA, 1993. http://www.theses.fr/1993EIAA0033.
Testo completoMarchi, Valentina Guichard Jean. "L'espace multiple de Calvino comme recherche d'un monde autre". Lyon : Université Lumière Lyon 2, 2004. http://demeter.univ-lyon2.fr:8080/sdx/theses/lyon2/2004/marchi_v.
Testo completoBenabdelouahed, Djafer. "Etude experimentale de la reaction proton (deuton, x) pion negatif : recherche de resonances multibaryoniques". Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13194.
Testo completoLabidi, Abdelhakim. "Contribution a un plan d'action pour la recherche en biologie moleculaire et en immunologie des mycobacteries". Paris 7, 1986. http://www.theses.fr/1986PA077089.
Testo completoBerat, Corinne. "Etude des résonances nucléaires géantes isovectorielles électriques par réaction d'échange de charge : recherche du mode monopolaire". Grenoble 1, 1988. http://www.theses.fr/1988GRE10145.
Testo completoHenniche, M'hammed. "Apprentissage incrémental à partir d'exemples dans un espace de recherche réduit". Paris 13, 1998. http://www.theses.fr/1998PA13A001.
Testo completoLibri sul tema "Espace de recherche étendu"
Philippe, Bonnin, a cura di. Architecture: Espace pensé, espace vécu. Paris: Recherches, 2007.
Cerca il testo completoCommission européenne. Direction générale de l'éducation et de la culture. L' Europe: Un espace pour la recherche. Luxembourg: Office des publications officielles des Communautés européennes, 2000.
Cerca il testo completoMartine, Hébert, e Conseil québécois de la recherche sociale., a cura di. Programme ESPACE: Évaluation des acquis des élèves : rapport de recherche. Québec: Université Laval, 1999.
Cerca il testo completoCongrès, Association canadienne-française pour l'avancement des sciences. Pour un espace de recherche au Canada français : discours, objets et méthodes: Actes. Ottawa: Presses de l'Université d'Ottawa, 1996.
Cerca il testo completoRuberti, Antonio. Un espace européen de la science: Réflexions sur la politique européenne de recherche. Paris: Presses universitaires de France, 1995.
Cerca il testo completoBarbara, Sosień, a cura di. L' Espace, la théâtralité et l'imaginaire: Études de l'Equipe de recherche sur l'imaginaire symbolique. Kraków: Abrys, 1998.
Cerca il testo completoFrance. Mission du patrimoine ethnologique. Agence d'Urbanisme du Bassin de la Sambre. Les Kiosques a musique: Patrimoine ethnologique, espace musical et symbolique urbaine : compte-rendu d'une recherche d'ethno-architecture. Paris: Mission du Patrimoine, Ministere de la culture, 1985.
Cerca il testo completoJournées, d'études meusiennes (17th 1989 Souilly France). L' espace meusien et la Révolution: Université de Nancy II, Centre de recherche régionale universitaire, 17e Journées d'études meusiennes: actes. Bar-le-Duc: Société des lettres, sciences et arts de Bar-le-Duc, 1990.
Cerca il testo completoHeidegger, Martin. Être et temps: Questions de méthode et voies de recherche. Marseille: Sud, 1989.
Cerca il testo completoBenoît, Cazabon, Allain Greg 1946-, Congrès de l'Acfas (61e : 1993 : UQAR) e Congrès de l'Acfas (62e : 1994 : UQAM), a cura di. Pour un espace de recherche au Canada français : discours, objets et méthodes : actes des colloques sur la recherche au Canada français à l'ACFAS 1993 à Rimouski et à l'ACFAS 1994 à Montréal. Ottawa, Ont: Presses de l'Université d'Ottawa, 1996.
Cerca il testo completoCapitoli di libri sul tema "Espace de recherche étendu"
Crouzet, Denis. "Espace d’ici-bas et espace de l’Au-delà : La violence catholique à la recherche de la cité de Dieu (France, 1560-1598)". In The Power of Space in Late Medieval and Early Modern Europe, 163–81. Turnhout: Brepols Publishers, 2013. http://dx.doi.org/10.1484/m.seuh.1.101413.
Testo completoBarbe, Dominique. "Saints évêques bâtisseurs et recherche d’unité en Italie et en Gaule (iv-viiie siècles)". In Espace sacré, mémoire sacrée. Le culte des évêques dans leurs villes (IVe-XXe siècle), 95–109. Turnhout: Brepols Publishers, 2015. http://dx.doi.org/10.1484/m.hag-eb.5.103671.
Testo completoPaquot, Thierry. "Espace / spatialité". In Vocabulaire des histoires de vie et de la recherche biographique, 78–80. Érès, 2019. http://dx.doi.org/10.3917/eres.delor.2019.01.0078.
Testo completoDODIER, Nicolas. "L’ESPACE PUBLIC DE LA RECHERCHE MÉDICALE". In Médias, médicaments et espace public, 93–132. Presses de l'Université du Québec, 2009. http://dx.doi.org/10.2307/j.ctv18ph4jt.8.
Testo completoDodier, Nicolas. "L’Espace Public De La Recherche Médicale". In Médias, médicaments et espace public, 93–132. Presses de l'Université du Québec, 2009. http://dx.doi.org/10.1515/9782760524712-006.
Testo completoBonnamour, Jacqueline, e Béatrice Vélard. "Espace rural, aménagement rural, recherche rurale". In Quelles recherches aujourd’hui pour les campagnes de demain ?, 17–34. ENS Éditions, 1996. http://dx.doi.org/10.4000/books.enseditions.20518.
Testo completoBussières, Denis. "D’Un Espace De Recherche à Un Espace De Production Cognitive". In La transformation sociale par l'innovation sociale, 145–57. Presses de l'Université du Québec, 2016. http://dx.doi.org/10.1515/9782760543881-018.
Testo completoReynaud, Jean-François. "Chapitre 1. Un espace à christianiser". In À la recherche d'un Lyon disparu, 25–77. Alpara, 2021. http://dx.doi.org/10.4000/books.alpara.5480.
Testo completoChivallon, Christine. "Chapitre 2. Matérialisation de la recherche". In Espace et identité à la Martinique, 33–47. CNRS Éditions, 1998. http://dx.doi.org/10.4000/books.editionscnrs.56322.
Testo completoLe Caro, Yvon. "Chapitre II. « Moi, toi, là » : la recherche du bon éclairage". In Les loisirs en espace agricole, 55–85. Presses universitaires de Rennes, 2007. http://dx.doi.org/10.4000/books.pur.395.
Testo completoAtti di convegni sul tema "Espace de recherche étendu"
Bergadaà, Michelle, e Paulo Peixoto. "Introduction générale". In 2ème Colloque International de Recherche et Action sur l’Intégrité Académique. « Les nouvelles frontières de l’intégrité ». IRAFPA, 2022. http://dx.doi.org/10.56240/cmb9901.
Testo completoTamarit Vallés, Inmaculada. "La recréation du hammam dans l’univers féminin de Karin Albou". In XXV Coloquio AFUE. Palabras e imaginarios del agua. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/xxvcoloquioafue.2016.3116.
Testo completoBertin, Éric. "Sans transition. Enquête sur la place des transitions dans l’espace des pratiques numériques". In Actes du congrès de l’Association Française de Sémiotique. Limoges: Université de Limoges, 2024. http://dx.doi.org/10.25965/as.8591.
Testo completoRapporti di organizzazioni sul tema "Espace de recherche étendu"
Cauhopé, Marion, François Duchêne e Marie-Christine Jaillet. Impact d'une catastrophe sur l'avenir d'un site industriel urbain. Les cas de Lyon et Toulouse. Fondation pour une culture de sécurité industrielle, giugno 2010. http://dx.doi.org/10.57071/730gkb.
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