Bibliografias temáticas / Convergence de la trajectoire

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Literatura científica selecionada sobre o tema "Convergence de la trajectoire"

Autor: Grafiati
Publicado: 23 de novembro de 2024

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Artigos de revistas sobre o assunto "Convergence de la trajectoire"

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Gubert, Serge. "« DU VENTRE DE LA ROYAUTÉ AUX JARDINS DE LA PAPAUTÉ » : ENTRE ISLAM ET CHRÉTIENTÉ, LE LEXIQUE ET LA MÉTAPHORE DU CORPS". Arabica 49, n.º 3 (2002): 267–98. http://dx.doi.org/10.1163/157005802760253243.

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AbstractÀ partir d'un exemple historique, celui de la dynastie mérinide (13ème-15ème siècle), cet article envisage la convergence entre lexique religieux et métaphores du corps tirées de la médecine humorale, au profit d'une énonciation discursive et visuelle de la souveraineté. Après l'examen de la métaphore du « ventre de pestilence » (Ibn Haldūn, Muqaddima), la deuxième partie opère une relecture du corps de la royauté mérinide (lexique emblématique, récit de fondation, cérémonial). Cette étude est enrichie grâce aux travaux réalisés sur le corps des rois, de l'empereur et du pape dans la sphère chrétienne. Il existerait une trajectoire historique commune aux deux rives, une matrice de la culture politique du corps étayée auprès des sciences arabes. Paradoxe, cette trajectoire est aujourd'hui mieux connue pour l'Occident chrétien, et appelle de nouvelles recherches dans le domaine arabo-islamique pour mieux cerner, dans le temps, une convergence du théologique et du corporel qui pourrait être celle du spirituel (imāma) et du temporel (mulk).
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SAIDI, IMEN, e NAHLA TOUATI. "APPRENTISSAGE DE COMMANDE POUR LE SUIVI DE TRAJECTOIRE D'UN PENDULE INVERSÉ À ROUE D'INERTIE NON LINÉAIRE". REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 68, n.º 4 (23 de dezembro de 2023): 424–30. http://dx.doi.org/10.59277/rrst-ee.2023.4.17.

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Cet article propose le contrôle d'apprentissage itératif pour les systèmes sous-actionnés non linéaires. Pour améliorer la vitesse de convergence du contrôle d'apprentissage itératif pour de tels systèmes et réduire la fluctuation de l'erreur du système, un algorithme de contrôle d'apprentissage itératif en boucle fermée de type D à gain variable exponentiel a été choisi. L'analyse de simulation MATLAB a ensuite été réalisée sur un système sous-actionné, non linéaire et instable, à savoir le pendule inversé à roue d'inertie. Les résultats de la simulation montrent que l'algorithme est efficace. De bonnes performances de suivi ont été obtenues. Le système converge vers des cycles limites stables après quelques itérations, garantissant des erreurs fluides et une vitesse de convergence satisfaisante.
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Rzezuchowski, Tadeusz. "Strong convergence of selections implied by weak". Bulletin of the Australian Mathematical Society 39, n.º 2 (abril de 1989): 201–14. http://dx.doi.org/10.1017/s0004972700002677.

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In some situations weak convergence in L1, implies strong convergence. Let P, L: T → C∘(ℝd) be measurable multifunctions (C∘(ℝd) being the set of closed, convex subsets of ℝd) the values L(t) affine sets and W(t) = P(t) ∩ L(t) extremal faces of P(t). Let pk be integrable selections of P, the projection of pk,(t) on L(t) and pk(t) on W(t). We prove that if converges weakly to zero then pk − k converges to zero in measure. We give also some extensions of this theorem. As applications to differential inclusions we investigate convergence of derivatives of convergent sequences of solutions and we describe solutions which are in some sense isolated. Finally we discuss what can be said about control functions u when the corresponding trajectories of ẋ = f(t, x, u) are convergent to some trajectory.
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Purchase, Sharon, Christina Kum e Doina Olaru. "An analysis of technical and commercialization paths for an innovation trajectory". Journal of Business & Industrial Marketing 32, n.º 6 (3 de julho de 2017): 848–63. http://dx.doi.org/10.1108/jbim-06-2015-0111.

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Purpose The purpose of this study is to investigate sequences of event and the resulting innovation paths and trajectories followed by a university spin-off organization. Design/methodology/approach A single longitudinal case study methodology was applied to analyze innovation events and paths along the trajectory. Narrative methods were used to analyze actor perceptions on innovation processes/events. Findings The study categorizes events and paths in two categories, technical and commercialization, and finds that lock-in events matter for convergence of an innovation trajectory. The results indicate that understanding critical events may assist timely interventions in the innovation paths, thus potentially avoiding disruptions of the development of an innovation trajectory. The temporal processes reveal contrasting convergence–divergence patterns in the trajectory, depending on the types of events that occur. Research limitations/implications Using a single case data may limit the applicability of the findings, which calls for future research. Practical implications Industries could monitor the technical and commercialization paths as a strategy to reduce “vulnerability” of the innovation trajectory and possible negative impacts. Knowledge about the role of the CEO is key for a university spin-off organization. Originality/value This study presents a new typology of events and paths, identifies and characterizes lock-in events and shows the relatively fragile dexterity between convergent and divergent paths along an innovation trajectory.
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Talbot, Aurélien. "La traductique en débat : émergence et usages d’un néologisme". Équivalences 50, n.º 1 (2023): 19–41. http://dx.doi.org/10.3406/equiv.2023.1607.

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Le néologisme «traductique » apparaît et commence à circuler dans la deuxième moitié des années 1980. Le concept qu’il désigne fait alors l’objet de débats en écho à ceux ayant accompagné l’apparition du néologisme «traductologie » . Nous cherchons ainsi à dégager deux visages de la traductique en revenant brièvement sur la diffusion de ce néologisme qu’Antoine Berman aurait été «le premier à défendre activement » (Collectif 1988) avant qu’il ne soit repris dans une toute autre optique de recherche et développement (L’Homme 1988 ; 1999). Nous observons ensuite comment la ligne de partage entre traductique et traductologie semble renforcer la distinction ancienne entre traduction littéraire et spécialisée alors que la traductique contribue par ailleurs à faire émerger une préoccupation transversale aux différents genres de traduction comme en témoignent les recherches d’Elmar Tophoven. Face à cette contradiction, nous montrons, enfin, que la trajectoire du néologisme «traductique » est traversée par la question du point de bascule entre une convergence redoutée et une convergence heureuse entre traduction et informatique, son apparition ayant permis de rappeler le caractère «d’emblée technique » de la traduction tout en soulignant les risques liés à son «devenir industriel » (Stiegler 1987).
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Cui, Hong, e Chongwen Yu. "A Mathematical Model for Self-Twist Yarn Spinning Process". Research Journal of Textile and Apparel 18, n.º 1 (1 de fevereiro de 2014): 1–5. http://dx.doi.org/10.1108/rjta-18-01-2014-b001.

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A mathematical model is established for self-twist spinning process by applying laws of fluid mechanics (i.e. mass conservation and momentum conservation). The motion curve of the convergent point was determined and the convergence point was decided by densities and velocities of two fed-in strands and the resultant self-twist yarn, independent of their mechanical properties. The experimental verification proves that the motion trajectory of the convergence point reaches a better agreement with the theoretical trajectory. The results provide general way to study the self-twist yarn spinning process and optimize the process parameters.
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Zhironkin, Sergey A., Vladimir V. Guzyr e Magerram A. Gasanov. "Economic convergence in the methodology of structural shifts". Vestnik Tomskogo gosudarstvennogo universiteta. Ekonomika, n.º 58 (2022): 24–41. http://dx.doi.org/10.17223/19988648/58/2.

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Throughout the entire period of market transformations, the trend towards the distance of the Russian economy from technologically advanced countries has persisted, in terms of both the dynamics of the main macroeconomic indicators and structural proportions. This is due to the high sensitivity of the Russian economy to external shocks, including technological ones, as well as a number of successive negative structural shifts. At the same time, the commonality of endogenous processes, which affect the structure of factors of production and distribution of national income, in the economies of advanced and catching up countries is not fully associated with economic convergence. The studies are dominated by exogenous sources of convergence - sociopolitical, cultural. Therefore, the study of the role and place of structural shifts in the system of economic convergence is a methodological approach that allows one to come close to the theoretical foundations for stabilizing macroeconomic dynamics, reducing the susceptibility of the national economy to external shocks, and entering a long-term growth trajectory above world rates. In this article, the authors consider the problem of launching convergent structural shifts - the basis for the transition of the Russian economy from economic divergence to convergence with advanced countries, which was the basis for the aim of this study. Within the framework of this article, a methodology for analyzing structural shifts in their mutual influence on technological, structural and economic convergence is presented. The authors give a typology of convergent and divergent structural shifts that bring the national economy closer or further away from technologically advanced market systems. Such a typology of structural shifts implies the endogenous nature of economic convergence, due to a change in the proportions of accumulation and consumption, the involvement of production factors in the creation of national income and its distribution, contrary to the prevailing exogenous approach to the study of economic convergence. Based on the presented typology, the article highlights the factors of structural convergence -neo-industrial and fundamental investment, associated with a priority increase in funding for fundamental research, the creation of new innovation and investment partnerships between the state and business, and the modernization of basic industries based on convergent technologies. The authors show that these factors should be institutionalized in a system of convergence-oriented structural policy, which is a key condition for the transition of the Russian economy from structural divergence to convergence, with access to a sustainable growth trajectory and a reduction in exposure to external shocks.
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Gan, Wenyang, Tianxing Xia e Zhenzhong Chu. "A Prognosis Technique Based on Improved GWO-NMPC to Improve the Trajectory Tracking Control System Reliability of Unmanned Underwater Vehicles". Electronics 12, n.º 4 (12 de fevereiro de 2023): 921. http://dx.doi.org/10.3390/electronics12040921.

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The dynamics model of the unmanned underwater vehicle (UUV) system is highly nonlinear, multi-degree-of-freedom, strongly coupled, and time-varying. Its motion control has been a complex problem due to the unknown information about and the uncertainty of the working environment. To improve the performance and reliability of UUV trajectory tracking control, a trajectory tracking method based on nonlinear model predictive control is designed, and an improved gray wolf optimization (IGWO) is proposed for the optimization of nonlinear model predictive control. The convergence factor of IGWO is designed as a nonlinear attenuation function, and the memory function is added to the position update equation to enhance the effect of trajectory tracking control. Through the simulation in the ROS environment, the influence of the convergence factor on the convergence rate of trajectory tracking error and tracking control performance is obtained. By comparing the tracking effects of several groups of reference trajectories, it is shown that the proposed method is universally applicable and effective to the trajectory tracking control of UUV. Compared with traditional gray wolf optimization (GWO), SQP, and other optimization algorithms, the reliability of the proposed method for UUV trajectory tracking control is demonstrated.
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Ning, Tan, Zhang Yun-Jun, Ouyang Qi e Geng Zhi. "Dynamical Convergence Trajectory in Networks". Chinese Physics Letters 22, n.º 9 (25 de agosto de 2005): 2447–50. http://dx.doi.org/10.1088/0256-307x/22/9/085.

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Le Bas, Christian. "Anticipations, compétence économique et régimes technologiques". Économie appliquée 50, n.º 2 (1997): 37–61. http://dx.doi.org/10.3406/ecoap.1997.1631.

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Cet article traite des anticipations faites par les firmes industrielles concernant les technologies. Deux approches sont retenues dans la littérature : la première considère que sous certaines conditions les anticipations technologiques peuvent être contre-productives, une seconde retient un schéma où les «prévisions» quant aux innovations sont autoréalisatrices. Nous montrons ensuite pourquoi les anticipations des agents sont cruciales dans une approche évolutionniste. On considère un schéma simple d’accumulation technologique de type kaldorien dans lequel les anticipations concernant le taux de progrès technique sont adaptatives. On montre que la trajectoire de croissance équilibrée est unique mais que les propriétés de convergence vers le point fixe sont différentes selon les régimes technologiques identifiés par Winter : on converge de façon monotone en régime routinier, par fluctuations en régime entrepreneurial. Ce résultat dépend de la façon dont la compétence économique fonctionne dans les deux régimes.
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Mais fontes

Teses / dissertações sobre o assunto "Convergence de la trajectoire"

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Duffy, Niall J. "Improved convergence for optimization of evasive maneuvering". Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/54374.

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Consider the problem of developing an algorithm that computes optimal preprogrammed evasive maneuvers for a Maneuvering Reentry Vehicle (MaRV) attacking a target defended with Anti-Ballistic Missiles (ABMs). The problem is large in terms of the number of optimization parameters, and perhaps in terms of the number of nonlinear constraints. Since both MaRV and ABM trajectories are expensive to compute, rapid convergence of the optimization algorithm is of prime concern. This paper examines a discontinuity in the cost function that degrades both the speed and the reliability of optimizer convergence. A solution is offered, proposing that the optimization algorithm be operated in a new parameter space, in which the discontinuity occurs at infinity. Effectively, the mapping prevents the optimization algorithm from crossing the discontinuity thereby improving optimizer convergence. Results comparing convergence with and without the parameter mapping demonstrate the effectiveness of the procedure.
Master of Science
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Hamadouche, Djamel. "Convergence de processus stochastiques à trajectoires hölderiennes". Lille 1, 1997. http://www.theses.fr/1997LIL10174.

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Nous etudions des processus stochastiques consideres comme elements aleatoires d'espace de holder d'ordre (0 <[alpha]< 1). Dans un premier temps, on considere les espaces de fonctions -holderiennes sur 0,1 qui (cf. Ciesielski) sont isomorphes a des espaces de banach de suites. Ceci nous permet d'avoir des criteres d'equitension de suites de processus stochastiques a trajectoires holderiennes. Nous appliquons d'abord ces resultats a l'etude de la convergence faible de processus de sommes partielles lisses. Nous etendons ainsi le principe d'invariance de lamperti (pour les lignes polygonales aleatoires de donsker-prokhorov) au cas de variables aleatoires dependantes (le melange fort ou l'association). Nous etablissons ensuite un principe d'invariance holderien pour le lissage par convolution des processus de sommes partielles (sous independance, melange fort ou association). Nous considerons enfin le processus empirique uniforme. Apres un lissage polygonal, nous prouvons sa convergence faible -holderienne vers le pont brownien pour tout [alpha]< 1/4 et l'optimalite de cette borne, un lissage par convolution nous donne par contre la borne de regularite [alpha]< 1/2 dans cette meme convergence. Finalement, on considere une echelle d'espaces de fonctions a regularite holderienne globale sur r et tendant vers 0 a l'infini. Les isomorphismes de ciesielski sont etendus a ces espaces. En utilisant les resultats generaux de suquet sur l'equitension dans les espaces schauder decomposables, nous obtenons aussi des criteres d'equitension. Comme application, on prouve la convergence faible holderienne du processus empirique lisse par convolution avec borne de regularite optimale.
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Maulen, Soto Rodrigo. "A dynamical system perspective οn stοchastic and iΙnertial methοds fοr optimizatiοn". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC220.

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Motivé par l'omniprésence de l'optimisation dans de nombreux domaines de la science et de l'ingénierie, en particulier dans la science des données, ce manuscrit de thèse exploite le lien étroit entre les systèmes dynamiques dissipatifs à temps continu et les algorithmes d'optimisation pour fournir une analyse systématique du comportement global et local de plusieurs systèmes du premier et du second ordre, en se concentrant sur le cadre convexe, stochastique et en dimension infinie d'une part, et le cadre non convexe, déterministe et en dimension finie d'autre part. Pour les problèmes de minimisation convexe stochastique dans des espaces de Hilbert réels séparables de dimension infinie, notre proposition clé est de les analyser à travers le prisme des équations différentielles stochastiques (EDS) et des inclusions différentielles stochastiques (IDS), ainsi que de leurs variantes inertielles. Nous considérons d'abord les problèmes convexes différentiables lisses et les EDS du premier ordre, en démontrant une convergence faible presque sûre vers les minimiseurs sous hypothèse d'intégrabilité du bruit et en fournissant une analyse globale et locale complète de la complexité. Nous étudions également des problèmes convexes non lisses composites utilisant des IDS du premier ordre et montrons que, sous des conditions d'intégrabilité du bruit, la convergence faible presque sûre des trajectoires vers les minimiseurs, et avec la régularisation de Tikhonov la convergence forte presque sûre des trajectoires vers la solution de norme minimale. Nous développons ensuite un cadre mathématique unifié pour analyser la dynamique inertielle stochastique du second ordre via la reparamétrisation temporelle et le moyennage de la dynamique stochastique du premier ordre, ce qui permet d'obtenir une convergence faible presque sûre des trajectoires vers les minimiseurs et une convergence rapide des valeurs et des gradients. Ces résultats sont étendus à des EDS plus générales du second ordre avec un amortissement visqueux et Hessien, en utilisant une analyse de Lyapunov spécifique pour prouver la convergence et établir de nouveaux taux de convergence. Enfin, nous étudions des problèmes d'optimisation déterministes non convexes et proposons plusieurs algorithmes inertiels pour les résoudre, dérivés d'équations différentielles ordinaires (EDO) du second ordre combinant à la fois un amortissement visqueux sans vanité et un amortissement géométrique piloté par le Hessien, sous des formes explicites et implicites. Nous prouvons d'abord la convergence des trajectoires en temps continu des EDO vers un point critique pour des objectives vérifiant la propriété de Kurdyka-Lojasiewicz (KL) avec des taux explicites, et génériquement vers un minimum local si l'objective est Morse. De plus, nous proposons des schémas algorithmiques par une discrétisation appropriée de ces EDO et montrons que toutes les propriétés précédentes des trajectoires en temps continu sont toujours valables dans le cadre discret sous réserve d'un choix approprié de la taille du pas
Motivated by the ubiquity of optimization in many areas of science and engineering, particularly in data science, this thesis exploits the close link between continuous-time dissipative dynamical systems and optimization algorithms to provide a systematic analysis of the global and local behavior of several first- and second-order systems, focusing on convex, stochastic, and infinite-dimensional settings on the one hand, and non-convex, deterministic, and finite-dimensional settings on the other hand. For stochastic convex minimization problems in infinite-dimensional separable real Hilbert spaces, our key proposal is to analyze them through the lens of stochastic differential equations (SDEs) and inclusions (SDIs), as well as their inertial variants. We first consider smooth differentiable convex problems and first-order SDEs, demonstrating almost sure weak convergence towards minimizers under integrability of the noise and providing a comprehensive global and local complexity analysis. We also study composite non-smooth convex problems using first-order SDIs, and show under integrability conditions on the noise, almost sure weak convergence of the trajectory towards a minimizer, with Tikhonov regularization almost sure strong convergence of trajectory to the minimal norm solution. We then turn to developing a unified mathematical framework for analyzing second-order stochastic inertial dynamics via time scaling and averaging of stochastic first-order dynamics, achieving almost sure weak convergence of trajectories towards minimizers and fast convergence of values and gradients. These results are extended to more general second-order SDEs with viscous and Hessian-driven damping, utilizing a dedicated Lyapunov analysis to prove convergence and establish new convergence rates. Finally, we study deterministic non-convex optimization problems and propose several inertial algorithms to solve them derived from second-order ordinary differential equations (ODEs) combining both non-vanishing viscous damping and geometric Hessian-driven damping in explicit and implicit forms. We first prove convergence of the continuous-time trajectories of the ODEs to a critical point under the Kurdyka-Lojasiewicz (KL) property with explicit rates, and generically to a local minimum under a Morse condition. Moreover, we propose algorithmic schemes by appropriate discretization of these ODEs and show that all previous properties of the continuous-time trajectories still hold in the discrete setting under a proper choice of the stepsize
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LAKHDARI, MOHAMMED EL-HACENE. "Famille d'applications trapezoidales de l'intervalle dont les iteres convergent vers une trajectoire periodique pour presque toute valeur du parametre". Nice, 1988. http://www.theses.fr/1988NICE4257.

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La famille a un parametre d'applications de l'intervalle que nous etudions a l'avantage de se preter facilement a des calculs combinatoires. Ceux-ci en retour, permettent de faire le calcul de tout le diagramme de bifurcation, de demontrer quelques belles proprietes de la famille et de mieux comprendre ce qu'est le chaos
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Grass, Andy Darrell. "Inferring lifestyle and locomotor habits of extinct sloths through scapula morphology and implications for convergent evolution in extant sloths". Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/1329.

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Despite the restricted morphology and distribution of sloths today, fossils sloths show a wide variety of forms and behaviors and used to range from South America to Alaska. These extinct forms have in the past simply been lumped together as "ground sloths", separated from modern "tree sloths". However there are intermediate forms that have been posited to be semi-arboreal. In other groups such as primates the shape of the shoulder blade has been shown to vary significantly between groups with different arboreal behaviors. This study used geometric morphometrics to examine the scapulae of modern and extinct sloths to show that these three locomotor groups can in fact be distinguished by their shoulder blade shape. Juveniles of giant ground sloths also have significantly different shoulder blade shapes than the much larger adults, however they do not overlap with the smaller intermediate sloths, so may have been just as terrestrial as their parents despite their much smaller size. Finally, ontogenetic trajectories of several sloth genera do not show evidence of having different slopes. They start and end in different areas of morhospace but are all on parallel paths. This argues against the hypothesis of convergence in modern tree sloths, which despite both having an unusual suspensory lifestyle are not closely related. Rather they are both retaining an ancestral growth trajectory that all sloths have possessed.
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Bin, Peng <1984&gt. "Spatial Disparity and Dynamic Trajectory of Convergence in China: Construction and Application of a Composite Index of Regional Development". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6435/1/Peng_Bin_ciclo_XXVI_Tesi.pdf.

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China is a large country characterized by remarkable growth and distinct regional diversity. Spatial disparity has always been a hot issue since China has been struggling to follow a balanced growth path but still confronting with unprecedented pressures and challenges. To better understand the inequality level benchmarking spatial distributions of Chinese provinces and municipalities and estimate dynamic trajectory of sustainable development in China, I constructed the Composite Index of Regional Development (CIRD) with five sub pillars/dimensions involving Macroeconomic Index (MEI), Science and Innovation Index (SCI), Environmental Sustainability Index (ESI), Human Capital Index (HCI) and Public Facilities Index (PFI), endeavoring to cover various fields of regional socioeconomic development. Ranking reports on the five sub dimensions and aggregated CIRD were provided in order to better measure the developmental degrees of 31 or 30 Chinese provinces and municipalities over 13 years from 1998 to 2010 as the time interval of three “Five-year Plans”. Further empirical applications of this CIRD focused on clustering and convergence estimation, attempting to fill up the gap in quantifying the developmental levels of regional comprehensive socioeconomics and estimating the dynamic convergence trajectory of regional sustainable development in a long run. Four clusters were benchmarked geographically-oriented in the map on the basis of cluster analysis, and club-convergence was observed in the Chinese provinces and municipalities based on stochastic kernel density estimation.
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Bin, Peng <1984&gt. "Spatial Disparity and Dynamic Trajectory of Convergence in China: Construction and Application of a Composite Index of Regional Development". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6435/.

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China is a large country characterized by remarkable growth and distinct regional diversity. Spatial disparity has always been a hot issue since China has been struggling to follow a balanced growth path but still confronting with unprecedented pressures and challenges. To better understand the inequality level benchmarking spatial distributions of Chinese provinces and municipalities and estimate dynamic trajectory of sustainable development in China, I constructed the Composite Index of Regional Development (CIRD) with five sub pillars/dimensions involving Macroeconomic Index (MEI), Science and Innovation Index (SCI), Environmental Sustainability Index (ESI), Human Capital Index (HCI) and Public Facilities Index (PFI), endeavoring to cover various fields of regional socioeconomic development. Ranking reports on the five sub dimensions and aggregated CIRD were provided in order to better measure the developmental degrees of 31 or 30 Chinese provinces and municipalities over 13 years from 1998 to 2010 as the time interval of three “Five-year Plans”. Further empirical applications of this CIRD focused on clustering and convergence estimation, attempting to fill up the gap in quantifying the developmental levels of regional comprehensive socioeconomics and estimating the dynamic convergence trajectory of regional sustainable development in a long run. Four clusters were benchmarked geographically-oriented in the map on the basis of cluster analysis, and club-convergence was observed in the Chinese provinces and municipalities based on stochastic kernel density estimation.
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Pontier, Monique. "Filtrage et controle de processus stochastiques soumis a des contraintes". Orléans, 1987. http://www.theses.fr/1987ORLE2016.

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Cardoso, Marques José Alexandre. "Trajectoire portugaise". Paris 3, 1998. http://www.theses.fr/1998PA030169.

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La these trajectoire portugaise est le resultat d'une longue recherche cinematographique, videographique et photographique aupres de la population portugaise immigree en region parisienne, dans la periode qui va de 1984 a 1998. Elle retrace le vecu de cette population a partir des annees 1960-70, des difficultes rencontrees par elle pour trouver a la fois le gite et le travail et pour, trente ans apres, participer de plus en plus a la vie economique, culturelle, artistique et scientifique du pays d'accueil, tout en cherchant a garder et meme a donner vie a son originalite et a son heritage culturel, tout en aidant au developpement economique de son pays d'origine. C'est en effet une these mixte qui cherche a etablir un lien entre, d'une part, la realisation des differents films - champigny sur tage ; (28min. -1987), dis-moi grand-pere ; (26min. -1989), trente ans apres : des portugais en france ; (62min. -1992), histoires vraies pour arrieres petits enfants ; (52min. -1993), maison du portugal a plaisir ; (26min. -1997), et le decoupage du montage simple (environ 30 heures tournees de 1984 a 1997) construit a partir d'une grande quantite de materiaux divers - interviewes, reportages, tournages, photographies - et, d'autre part, une analyse qui m'a permis, tout au long de ma recherche, d'acquerir une grande connaissance de cette realite et de la scenarisation du reel, tout en respectant la memoire audiovisuelle du quotidien de cette population qui vit constamment entre le portugal et la france. C'est un temoignage sur la communaute portugaise en france en images et sons pour l'avenir. L'ouvrage se compose de 605 pages dont 308 consacrees au developpement de la these, les autres constituant une etude plus technique des images. La premiere partie aboutit a la proposition d'une autre pratique du cinema documentaire, comme on peut le voir a travers 10 chapitres dont voici certains titres mes motivations. Richesse du regard de la camera, maniere de travailler, l'image revelatrice de la realite, la conservation de l'image, la camera outil d'analyse sur les mentalites. Face aux nouveaux moyens de communication, la camera permet-elle de filmer la realite, et le film documentaire n'en est-il pas le miroir par excellence ?
This thesis + portuguese trajectory ;, is the result of a long research in documentary film-making through photography, film and video, of the immigrant portuguese population in the region of paris, during the period of 1984-1998. About 100 individuals were interviewed. The images record their experiences, from 1960-1970, to find lodging and employment and - in the 30 years that followed - portray their efforts to participate in the economic and cultural, artistic and scientific life in the country which accepted them - while at the same time they tried to maintain their unique personalities and cultural heritage, as well as participate in the economic life and development of their country of origin. Between 1984 and 1997, a large amount of footage was made that was based on interviews, reports and varieties of other documented materials. At the same time, an analysis was continually made during this research in order to develop an approach and understanding of these people who balanced their lives between the country of their origin and france. This is, in fact, a mixed thesis which aims to establish a relationship between film and text. The purpose of the film is to establish a record of image and sound for the future. Considering all the new ways we have to communicate, the camera certainly permits us to film reality - and isn't the documentary film the best mean of expression ? note - in this thesis of 605 pages, 308 are devoted to the description of the daily life of this people. The balance of the study is a more detailed discussion of the film-making techniques
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Pellegrini, Clément. "Existence, unicité et approximation des équations de Schrödinger stochastiques". Phd thesis, Université Claude Bernard - Lyon I, 2008. http://tel.archives-ouvertes.fr/tel-00334668.

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Les "équations de Schrödinger stochastiques" sont des équations différentielles stochastiques de type non classique qui apparaissent dans le domaine de la mesure en mécanique quantique. Leurs solutions sont appelées "trajectoires quantiques" et décrivent l'évolution de petits systèmes quantiques ouverts soumis à une mesure continue de type indirecte (on mesure l'environnement qui interagit avec le petit système).

Habituellement, les justifications mathématiques et physiques de ces modèles sont loin d'être intuitives et évidentes. Soit elles manquent de rigueur car basées sur des arguments heuristiques, soit elles uilisent des outils mathématiques lourds et très abstraits (Filtrage quantique, espérance conditionnelle dans les algèbres de Von Neumann...).

Dans cette thèse, on met en place un modèle discret de mesure en mécanique quantique. Ce modèle est basé sur celui des "interactions quantiques répétées" développé par Stéphane ATTAL et Yan PAUTRAT. Le cadre est le suivant. On considère un petit système en contact avec une chaine infinie de petits systèmes (tous notés H) identiques et indépedants entre eux. Chaque copie H interagit avec le petit système pendant un temps h. Après chaque interaction, on effectue une mesure sur H. Cette série de mesures entraine une série de modifications aléatoires de l'état du petit système. Cette série de modifications est alors décrite à l'aide d'une chaine de Markov dépendante du paramètre h. On montre alors que l'on peut obtenir les trajectoires quantiques, solutions des équations de Schrödinger stochastiques, comme limite continue (h tend vers 0) à partir de ces chaines de Markov. Ce résultat de convergence nécessite, au préalable, une étude complète des problèmes d'existence et d'uncité des solutions.

Grâce à ce résultat de convergence, à partir d'un modèle physique discret, on justifie de façon rigoureuse et intuive l'utilisation des équations de Schrödinger stochastiques. On étend ensuite ces résultats dans le cas de modèles en dimension finie quelconque et on introduit la notion de controle.
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Livros sobre o assunto "Convergence de la trajectoire"

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Palmer, Grant. Comparison of nonequilibrium solution algorithms applied to chemically stiff hypersonic flows. Washington, DC: American Institute of Aeronautics and Astronautics, 1995.

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Bodiang, Aïda Aïssatou Djiba. Une trajectoire difficile: Roman. Dakar: L'Harmattan Sénégal, 2019.

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1968-, Jobin Michel. La trajectoire du pion. Québec: Alire, 2001.

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Créantor, Justin. Trajectoire: (chimen an mwen). Pointe-à-Pitre [Guadeloupe]: SOGED, 1988.

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Michel, Butor. Michel Butor: Rencontre, trajectoire. Carcassonne: Centre Joë Bousquet et son temps, 2001.

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6

Bostels, Bruno. Alain Badiou, une trajectoire polémique. Paris: La Fabrique, 2009.

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de, Lagarde Bertrand, e Namias Olivier, eds. Sud architectes, une trajectoire d'agence. [Paris?]: Creaphis, 2009.

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Andrée, Michel. Siemens: Trajectoire d'une entreprise mondiale. Paris: Institute, éditeur, 1990.

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9

Audi, Paul. Michel Henry: Une trajectoire philosophique. Paris: Belles lettres, 2006.

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Desmet, Huguette. Prédire, comprendre la trajectoire scolaire. Paris: Presses universitaires de France, 1993.

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Capítulos de livros sobre o assunto "Convergence de la trajectoire"

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Drew, Eileen. "Career Trajectories: Convergence or Divergence?" In Gendering Elites, 50–65. London: Palgrave Macmillan UK, 2000. http://dx.doi.org/10.1007/978-1-349-62882-7_5.

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Lee, Dongwook, Jinsul Kim, Haewook Choi e Minsoo Hahn. "Color Coding for Massive Bicycle Trajectories". In IT Convergence and Security 2012, 509–14. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5860-5_60.

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Pham, Hai-Trieu, Jung-ja Kim e Yonggwan Won. "A Cost Effective Method for Matching the 3D Motion Trajectories". In IT Convergence and Security 2012, 889–95. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5860-5_107.

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Li, Yan, Weonil Chung e Hae-Young Bae. "A Novel Outlier Detection Method for Spatio-Tempral Trajectory Data". In Convergence and Hybrid Information Technology, 698–707. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24082-9_85.

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Chai, Runqi, Al Savvaris, Antonios Tsourdos e Senchun Chai. "Hybrid Optimization Methods with Enhanced Convergence Ability". In Design of Trajectory Optimization Approach for Space Maneuver Vehicle Skip Entry Problems, 73–97. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9845-2_5.

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Byrnes, Christopher I., David S. Gilliam e Victor I. Shubov. "Convergence of Trajectories for a Controlled Viscous Burgers’ Equation". In Control and Estimation of Distributed Parameter Systems: Nonlinear Phenomena, 61–77. Basel: Birkhäuser Basel, 1994. http://dx.doi.org/10.1007/978-3-0348-8530-0_4.

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Katsuda, Keisuke, Yutaka Yanagisawa e Tetsuji Satoh. "A Pattern-Based Predictive Indexing Method for Distributed Trajectory Databases". In Information Networking. Convergence in Broadband and Mobile Networking, 745–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-30582-8_78.

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Cominetti, Roberto. "Nonlinear Averages and Convergence of Penalty Trajectories in Convex Programming". In Lecture Notes in Economics and Mathematical Systems, 65–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-45780-7_5.

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Dolićanin, Ćemal B., e Anatolij B. Antonevich. "The Convergence of a Subspace Trajectory for an Arbitrary Operator". In Dynamical Systems Generated by Linear Maps, 141–55. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08228-8_12.

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Rikap, Cecilia, e Bengt-Åke Lundvall. "Amazon and Microsoft: Convergence and the Emerging AI Technology Trajectory". In The Digital Innovation Race, 91–119. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89443-6_5.

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Trabalhos de conferências sobre o assunto "Convergence de la trajectoire"

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Yan, Yuxin, Hutao Cui e Peng Han. "Adaptive trajectory tracking control of space manipulator with fast fixed-time convergence". In International Conference on Optics, Electronics, and Communication Engineering, editado por Yang Yue, 212. SPIE, 2024. http://dx.doi.org/10.1117/12.3049873.

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Cui, Can, Shanling Dong, Meiqin Liu, Zhen Fan e Senlin Zhang. "Trajectory Planning of Robot Considering Variation of Convergence Zone Length in Circular Braiding System". In 2024 43rd Chinese Control Conference (CCC), 6867–74. IEEE, 2024. http://dx.doi.org/10.23919/ccc63176.2024.10662385.

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Bompais, Mael, Nina H. Amini e Clement Pellegrini. "Parameter Estimation for Quantum Trajectories: Convergence Result". In 2022 IEEE 61st Conference on Decision and Control (CDC). IEEE, 2022. http://dx.doi.org/10.1109/cdc51059.2022.9992617.

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Tenne, Yoel. "Trajectory-Based Convergence Acceleration of Evolutionary Algorithms". In 2023 27th International Computer Science and Engineering Conference (ICSEC). IEEE, 2023. http://dx.doi.org/10.1109/icsec59635.2023.10329782.

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Popov, Alexander, Cristiano Contini e Mattia Zamaro. "Fast Sequential Convex Programming with Relaxed Convergence Criteria". In ESA 12th International Conference on Guidance Navigation and Control and 9th International Conference on Astrodynamics Tools and Techniques. ESA, 2023. http://dx.doi.org/10.5270/esa-gnc-icatt-2023-122.

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The growing interest in lunar exploration demands the development of spacecraft which can land autonomously on the Moon’s surface. Typically, such missions define an ellipse around some selected landing point and any location within this ellipse is deemed acceptable for touchdown. To ensure a safe landing, a spacecraft can employ a hazard detection and avoidance (HDA) system, capable of identifying potential dangers at the target and triggering diversion to another point within the ellipse. The choice of landing site for a mission is a compromise between scientific priorities and landing safety. However, many scientific sites of interest may not be well-suited to landers as there may be hazards, such as craters or rocks, which greatly limit the size of a potential landing ellipse. To enable a broader range of missions, a lander should be capable of diverting to a new target at relatively low altitude and efficiently reaching the target with pinpoint accuracy. This would not only make it possible to reduce the minimum landing ellipse size for a given vehicle design, but it would also allow for a relaxation of the surface hazard requirements within the chosen ellipse. If this can be achieved, then a much more versatile set of lunar landing sites can be considered, prioritising scientific needs over engineering limitations. Fast and accurate retargeting demands a sophisticated guidance algorithm which can rapidly compute a trajectory to a new point. This paper presents progress on such an algorithm, which solves a trajectory optimisation problem to achieve fuel-optimal pinpoint landing. To enable late diversion, this algorithm must be able to run on board the spacecraft in real time, and so our research has focused on the use of fast, resource-efficient methods based on sequential convex programming. We recommend two related strategies which can enable fast termination of sequential convex programming algorithms: Hermite interpolation to extract a continuous-time state trajectory from the convex solver, and mesh refinement to enable efficient convergence towards an accurate solution. In combination, these techniques can ensure that the algorithm terminates after only a few iterations, using relatively relaxed stopping criteria, while still producing a feasible solution which can exactly satisfy terminal equality constraints. The benefits of this framework are demonstrated using the case study of guidance for an autonomous lunar lander with a complete model of the system dynamics in six degrees of freedom.
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Van Scoy, Bryan, e Laurent Lessard. "Integral Quadratic Constraints: Exact Convergence Rates and Worst-Case Trajectories". In 2019 IEEE 58th Conference on Decision and Control (CDC). IEEE, 2019. http://dx.doi.org/10.1109/cdc40024.2019.9029588.

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Grahl, Jörn, Peter A. N. Bosman e Stefan Minner. "Convergence phases, variance trajectories, and runtime analysis of continuous EDAs". In the 9th annual conference. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1276958.1277069.

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Lee, Yu-Hsiu, e Tsu-Chin Tsao. "Data-Driven ILC for Trajectory Tracking in Nonlinear Dynamic Systems". In ASME 2019 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/dscc2019-8926.

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Abstract The aim of this work is to propose a data-driven ILC algorithm that features fast convergence for nonlinear dynamic systems. This idea utilizes adaptive filtering that implicitly identifies the time-varying system inverse along the trajectory being tracked. By feeding the error signal through the copied inverse filter, it results in a rapidly convergent inversion-based ILC. This approach is compared to a nonlinear extension of the data-driven ILC that uses system adjoint as the learning filter. The developed algorithm is validated through simulation on a fully actuated 2 DOF Furuta pendulum.
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Deng, Yue, Zirui Wang e Yin Zhang. "Improving Multi-agent Reinforcement Learning with Stable Prefix Policy". In Thirty-Third International Joint Conference on Artificial Intelligence {IJCAI-24}. California: International Joint Conferences on Artificial Intelligence Organization, 2024. http://dx.doi.org/10.24963/ijcai.2024/6.

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In multi-agent reinforcement learning (MARL), the epsilon-greedy method plays an important role in balancing exploration and exploitation during the decision-making process in value-based algorithms. However, the epsilon-greedy exploration process will introduce conservativeness when calculating the expected state value when the agents are more in need of exploitation during the approximate policy convergence, which may result in a suboptimal policy convergence. Besides, eliminating the epsilon-greedy algorithm leaves no exploration and may lead to unacceptable local optimal policies. To address this dilemma, we use the previously collected trajectories to construct a Monte-Carlo Trajectory Tree, so that an existing optimal template, a sequence of state prototypes, can be planned out. The agents start by following the planned template and act according to the policy without exploration, Stable Prefix Policy. The agents will adaptively dropout and begin to explore by following the epsilon-greedy method when the policy still needs exploration. We scale our approach to various value-based MARL methods and empirically verify our method in a cooperative MARL task, SMAC benchmarks. Experimental results demonstrate that our method achieves not only better performance but also faster convergence speed than baseline algorithms within early time steps.
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Hussary, N., J. Schein e J. Heberlein. "Control of Jet Convergence in Wire Arc Spray Systems". In ITSC 1999, editado por E. Lugscheider e P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0335.

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Abstract This paper aims to achieve improved control over the spray pattern in a wire arc torch by means of constructive measures to influence the flow dynamics. It focuses on evaluating different fluid dynamic designs of the spray torches with respect to the droplet trajectories and velocity distributions and the deposit distribution. First, the paper describes the approaches for novel nozzle designs including the addition of shrouds and the torch evaluation diagnostics, and then presents the results for four different nozzle arrangements. It is observed that the nozzle design and the placement of the wire tips within the nozzle have the greatest effect on the divergence of the spray pattern. Paper includes a German-language abstract.
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Relatórios de organizações sobre o assunto "Convergence de la trajectoire"

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Boschen, Jeffery. Where to draw the line: Chasing energy extrapolations, cluster convergence, and molecular trajectories. Office of Scientific and Technical Information (OSTI), maio de 2017. http://dx.doi.org/10.2172/1417979.

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Ischinger, Wolfgang, e Joseph S. Nye, Jr. Mind the Gap: Priorities for Transatlantic China Policy – Report of the Distinguished Reflection Group on Transatlantic China Policy. Munich Security Conference, julho de 2021. http://dx.doi.org/10.47342/gxwk1490.

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Today’s China presents fundamental challenges to the democracies of Europe and North America. Perspectives on China will continue to differ due to geography, economic exposure, perceptions, historical trajectories as well as foreign policy approaches. But there has been significant convergence among transatlantic partners. Today, areas of agreement are substantial and offer a solid basis for cooperation. What is needed is a pragmatic approach identifying joint action where possible and managing differences where necessary. This report proposes a transatlantic agenda aimed at achieving quick wins, with recommendations organized by seven issue areas.
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Saalman, Lora, Fei Su e Larisa Saveleva Dovgal. Cyber Posture Trends in China, Russia, the United States and the European Union. Stockholm International Peace Research Institute, dezembro de 2022. http://dx.doi.org/10.55163/elwl8053.

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Current understanding of the cyber postures of China, Russia, the USA and the EU merits re-evaluation. It is often assumed that China and Russia are aligned, yet this is not always the case. Unlike Russia, which has an ongoing focus on information security, China’s official documents incorporate both information security and cybersecurity concerns that are similar to the USA and the EU. Moreover, while often paired, the USA and the EU have differing regulatory structures in cyberspace. Further, both actors increasingly mirror Russian and Chinese concerns about the impact of information warfare on domestic stability. By examining key trends in each actor’s cyber posture, this report identifies points of convergence and divergence. Its conclusions will inform a broader SIPRI project that maps cyber posture trajectories and explores trilateral cyber dynamics among China, Russia and the USA to assist the EU in navigating future cyber escalation and enhancing global cyber stability.
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Dorr, Adam, e Tony Seba. Rethinking Energy: The Great Stranding: How Inaccurate Mainstream LCOE Estimates are Creating a Trillion-Dollar Bubble in Conventional Energy Assets. RethinkX, fevereiro de 2021. http://dx.doi.org/10.61322/uuda4616.

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We are on the cusp of the fastest, deepest, most profound disruption of the energy sector in over a century. Like most disruptions, this one is being driven by the convergence of several key technologies whose costs and capabilities have been improving on consistent and predictable trajectories – namely, solar photovoltaic power, wind power, and lithium-ion battery energy storage. Our analysis shows that 100% clean electricity from the combination of solar, wind, and batteries (SWB) is both physically possible and economically affordable across the entire continental United States as well as the overwhelming majority of other populated regions of the world by 2030. Adoption of SWB is growing exponentially worldwide and disruption is now inevitable because by 2030 they will offer the cheapest electricity option for most regions. Coal, gas, and nuclear power assets will become stranded during the 2020s, and no new investment in these technologies is rational from this point forward.
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Guirola, Luis, Laura Hospido e Andrea Weber. Family and career: An analysis across Europe and North America. Madrid: Banco de España, maio de 2024. http://dx.doi.org/10.53479/36575.

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Using data for 17 countries in Europe and North America, we compare the career trajectories of mothers and fathers and of women and men without children across cohorts and at different points in their life cycle. There is wide cross-country variation in employment and earnings gaps at age 30. At age 50, however, employment gaps between mothers and non-mothers have closed in most countries. We also observe convergence in employment gaps between mothers and fathers by age 50, but these gaps do not close altogether. Motherhood gaps in earnings also close by age 50 between mothers and non-mothers, particularly among the highly educated. But there is strong persistence in earnings gaps between mothers and fathers even among highly educated parents. The main reasons for the remaining gaps at later stages in the life-cycle are part-time work among women and fatherhood premia as fathers’ earnings outperform non-fathers’ over their life-cycle.
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Rodrik, Dani. Unconditional Convergence. Cambridge, MA: National Bureau of Economic Research, outubro de 2011. http://dx.doi.org/10.3386/w17546.

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Papneja, R., B. Parise, S. Hares, D. Lee e I. Varlashkin. Basic BGP Convergence Benchmarking Methodology for Data-Plane Convergence. RFC Editor, abril de 2016. http://dx.doi.org/10.17487/rfc7747.

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Needham, C., e K. McPherson. Convergence. Final Report. Office of Scientific and Technical Information (OSTI), março de 2004. http://dx.doi.org/10.2172/823669.

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Potocki, Mark L., James P. Jr Jenkins e Curt A. Bronkhorst. Mesh Convergence Issues. Office of Scientific and Technical Information (OSTI), outubro de 2012. http://dx.doi.org/10.2172/1053526.

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Kremer, Michael, Jack Willis e Yang You. Converging to Convergence. Cambridge, MA: National Bureau of Economic Research, novembro de 2021. http://dx.doi.org/10.3386/w29484.

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