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Dissertations / Theses on the topic 'Lagrange space'

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1

Maietti, Sara. "A new isotopic fragments identification with Lagrange Multipliers in the FOOT experiment." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25497/.

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Hadrontherapy is one of the available techniques used nowadays to treat cancer. Specifically, it employs beams of protons or heavier ions with initial energies of hundreds of MeV/u. Hadrontherapy has an advantageous energy release in the patient, allowing to irradiate the cancer volume in a more precise way and to spare the healthy tissues surrounding it. The main drawback of this kind of therapy is the nuclear interaction of the primary beam with the nuclei constituting the irradiated tissue. Target and projectile nuclear fragmentation could have a dangerous biological effect on tissues surro
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2

Veglia, Luca. "Multisymplectic formalism for theories of super-fields and non-equivalent symplectic structures on the covariant phase space." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC303/document.

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Le Calcul des Variations et son interprétation géométrique ont toujours joué un rôle crucial en Physique Mathématique, que ce soit par le formalisme lagrangien, ou à travers les équations hamiltoniennes.Le formalisme multisymplectique permet une description géométrique de dimension finie des théories de champ classiques (qui correspondent à des problèmes variationnels avec plusieurs variables spatio-temporelles) vues d’un point de vue hamiltonien. La géométrie multisymplectique joue un rôle similaire à celui de la géométrie symplectique dans la description de la mécanique hamiltonienne classiq
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3

Lamichhane, Bishnu P. "Higher order mortar finite elements with dual Lagrange multiplier spaces and applications." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-26215.

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4

Steck, Daniel [Verfasser], Christian [Gutachter] Kanzow, Michael [Gutachter] Ulbrich, and Christian [Gutachter] Meyer. "Lagrange Multiplier Methods for Constrained Optimization and Variational Problems in Banach Spaces / Daniel Steck ; Gutachter: Christian Kanzow, Michael Ulbrich, Christian Meyer." Würzburg : Universität Würzburg, 2018. http://d-nb.info/1174143622/34.

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5

Dumont, Andre. "Convergence, interpolation, échantillonnage et bases de Riesz dans les espaces de Fock." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4754/document.

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Nous étudions le problème d'unicité, de l'interpolation faible et de la convergence de la série d'interpolation de Lagrange dans les espaces de Fock pondérés par des poids radiaux. Nous étudions aussi les suites d'échatillonnage, d'interpolation et les bases de Riesz dans les petit espaces de Fock<br>We study the uniqueness sets, the weak interpolation sets, and convergence of the Lagrange interpolation series in radial weighted Fock spaces. We study also sampling, interpolation and Riesz bases in small radial weighted Fock spaces
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Foltran, Julien. "Les monastères et l'espace urbain et périurbain médiéval en Pays d'Aude : Lagrasse, Alet et Caunes." Thesis, Toulouse 2, 2016. http://www.theses.fr/2016TOU20132/document.

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À travers les exemples de Lagrasse, Alet-les-Bains et Caunes-Minervois, cette thèse propose de déterminer les mécanismes et le rôle des acteurs du développement des bourgs monastiques du VIIIe au milieu du XVIe siècle en pays d’Aude. Les modalités du peuplement des sites sont appréhendées, ainsi que les relations entre la communauté des religieux et celle des habitants. La construction de l’espace urbain de ces villes moyennes du Moyen Âge est un des thèmes principaux, abordé à travers l’inventaire des maisons, l’analyse des plans anciens et les sources écrites médiévales et modernes. L’espace
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Foltran, Julien. "Les monastères et l'espace urbain et périurbain médiéval en Pays d'Aude : Lagrasse, Alet et Caunes." Electronic Thesis or Diss., Toulouse 2, 2016. http://www.theses.fr/2016TOU20132.

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À travers les exemples de Lagrasse, Alet-les-Bains et Caunes-Minervois, cette thèse propose de déterminer les mécanismes et le rôle des acteurs du développement des bourgs monastiques du VIIIe au milieu du XVIe siècle en pays d’Aude. Les modalités du peuplement des sites sont appréhendées, ainsi que les relations entre la communauté des religieux et celle des habitants. La construction de l’espace urbain de ces villes moyennes du Moyen Âge est un des thèmes principaux, abordé à travers l’inventaire des maisons, l’analyse des plans anciens et les sources écrites médiévales et modernes. L’espace
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8

Jelena, Stojanov. "Anisotropic frameworks for dynamical systems and image processing." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=93698&source=NDLTD&language=en.

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The research topic of this PhD thesis is a comparative analysis of classical specic&nbsp;geometric frameworks and of their anisotropic extensions; the construction of three different&nbsp;types of Finsler frameworks, which are suitable for the analysis of the cancer cells population&nbsp;dynamical system; the development of the anisotropic Beltrami framework theory with the&nbsp;derivation of the evolution&nbsp;ow equations corresponding to different classes of anisotropic&nbsp;metrics, and tentative applications in image processing.<br>Predmet istraživanja doktorske disertacije je uporedna an
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9

Verovic, Patrick. "Entropies et métriques de Finsler." Grenoble 1, 1996. http://www.theses.fr/1996GRE10138.

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Pose au debut des annees 80 par a. Katok et m. Gromov, le probleme riemannien de l'entropie minimale a recu une reponse positive en 1994 grace aux resultats de g. Besson, g. Courtois et s. Gallot. Comme un prolongement de ce travail, l'objet de cette these est l'etude du minimum des entropies volumique et topologique pour les metriques de finsler qui constituent la plus petite extension de la geometrie de riemann. Les trois premiers chapitres conduisent a la construction explicite d'un contre-exemple general a la conjecture finslerienne de l'entropie volumique minimale sur les espaces riemanni
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10

Ngo, Fabien. "Quantum structures of some non-monotone Lagrangian submanifolds." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210039.

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In this thesis we present a slight generalisation of the Pearl complex or relative quantum homology to some non monotone Lagrangian submanifolds. First we develop the theory for the so called almost monotone Lagrangian submanifolds, We apply it to uniruling problems as well as estimates for the relative Gromov width. In the second part we develop the theory for toric fiber in toric Fano manifolds, recovering previous computaional results of Floer homology .<br>Doctorat en Sciences<br>info:eu-repo/semantics/nonPublished
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Debroux, Noémie. "Mathematical modelling of image processing problems : theoretical studies and applications to joint registration and segmentation." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMIR02/document.

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Dans cette thèse, nous nous proposons d'étudier et de traiter conjointement plusieurs problèmes phares en traitement d'images incluant le recalage d'images qui vise à apparier deux images via une transformation, la segmentation d'images dont le but est de délimiter les contours des objets présents au sein d'une image, et la décomposition d'images intimement liée au débruitage, partitionnant une image en une version plus régulière de celle-ci et sa partie complémentaire oscillante appelée texture, par des approches variationnelles locales et non locales. Les relations étroites existant entre ce
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12

Mussard, Bastien. "Modélisation quantochimiques des forces de dispersion de London par la méthode des phases aléatoires (RPA) : développements méthodologiques." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0292/document.

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Dans cette thèse sont montrés des développements de l'approximation de la phase aléatoire (RPA) dans le contexte de théories à séparation de portée. On présente des travaux sur le formalisme de la RPA en général, et en particulier sur le formalisme "matrice diélectrique" qui est exploré de manière systématique. On montre un résumé d'un travail sur les équations RPA dans le contexte d'orbitales localisées, notamment des développements des orbitales virtuelles localisées que sont les "orbitales oscillantes projetées" (POO). Un programme a été écrit pour calculer des fonctions telles que le trou
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13

Wang, Hsuan-Hao, and 王璿豪. "A full-space quasi Lagrange-Newton-Krylov algorithm for trajectory optimization problems with space mission." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/gnm4x4.

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碩士<br>國立中央大學<br>數學系<br>105<br>The trajectory optimization is a commonly-used technique of applications in aerospace engineering, such as find the optimal trajectory to maximize the weight of the payload or minimize the time for satellite insertion the target orbit, etc. This type of problem can be modeled mathematically as some form of continuous time optimal control problems. This thesis focuses on the study of the full-space quasi Lagrange-Newton-Krylov method as our numerical solver. First, we introduce the Lagrangian multiplier to convert the constrained optimization problem into unconstra
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14

Ko, Chih-Chieh, and 柯智傑. "A Full Space Lagrange-Newton Algorithm for Nonlinear Optimal Control Problems." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/kvz7dj.

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碩士<br>國立中央大學<br>數學系<br>107<br>The trajectory optimization problem with a wide range of applications in physics and engineering can be modeled mathematically in some form of continuous time optimal control problems. After discretizing the optimal control problem we solve the resulting parameter constrained optimization problem by using the Lagrange-Newton method. In this method, we introduce the Lagrange multiplier to the objective function and then solve the constrained optimization problem by finding the critical solution of the first-order necessary condition (KKT condition). We consider two
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15

Lo, Yi-Su, and 駱易俗. "A Full Space Lagrange-Newton-Krylov Algorithm for Minimum Time Trajectory Optimization." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/72397543971517641871.

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碩士<br>國立中央大學<br>數學研究所<br>100<br>Trajectory optimization problem is concerned with the design of an optimal trajectory that maximizes or minimizes some measurement and satisfies prescribed conditions. Because of this characteristic, it is in general formulated as an optimal control problem and hence is related to the optimal control theory, a branch of mathematics as an application of the calculus of variations. Recently, with an improvement of computer powers, computational techniques become more widely used in solving optimal control problems. Two main approaches, namely direct and indirect m
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16

Lien, Cheng-Chieh, and 連政杰. "A parallel full-space Lagrange-Newton method for low-thrust orbit transfer trajectory optimization problems." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/sgad26.

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碩士<br>國立中央大學<br>數學系<br>106<br>In the planning stage of space missions, trajectory optimization plays an important role in planning the flight path that maximum or minimum some quanitities before the mission begins. This type of mathematically problem can be expressed as a continuous time optimal control problem. In recent years, more space missions choose to use electric propulsion for orbital operations. However, this propulsion system is classified into the low thrust propulsion system. The problem of low thrust orbit transition is a difficult problem. Compared with the high thrust spacecraf
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17

Huang, Yao-Ping, and 黃耀平. "A Nonlinearly Preconditioned Full-space Lagrange-Newton Method for Low Thrust Orbit Transfer Optimization Problems." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/cdxt4x.

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碩士<br>國立中央大學<br>數學系<br>107<br>In space missions, the low-thrust propulsion system is another name for the electrically-powered spacecraft propulsion system. Recently, traditional chemical propulsion system change to the electrically-powered spacecraft propulsion system in the most space missions, so the low-thrust problems become more common. The optimization and design of low-thrust orbit transfer always have been a difficult problem in space exploration missions. For these problems, we propose a nonlinearly preconditioned Full-space Lagrange-Newton Method. The method is kind of the right non
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18

Steck, Daniel. "Lagrange Multiplier Methods for Constrained Optimization and Variational Problems in Banach Spaces." Doctoral thesis, 2018. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-174444.

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This thesis is concerned with a class of general-purpose algorithms for constrained minimization problems, variational inequalities, and quasi-variational inequalities in Banach spaces. A substantial amount of background material from Banach space theory, convex analysis, variational analysis, and optimization theory is presented, including some results which are refinements of those existing in the literature. This basis is used to formulate an augmented Lagrangian algorithm with multiplier safeguarding for the solution of constrained optimization problems in Banach spaces. The method is anal
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19

Lamichhane, Bishnu Prasad [Verfasser]. "Higher order mortar finite elements with dual Lagrange multiplier spaces and applications / vorgelegt von Bishnu Prasad Lamichhane." 2006. http://d-nb.info/980258340/34.

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20

Lamichhane, Bishnu P. [Verfasser]. "Higher order mortar finite elements with dual Lagrange multiplier spaces and applications / vorgelegt von Bishnu Prasad Lamichhane." 2006. http://d-nb.info/980258340/34.

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