Tesi sul tema "Jacket control"

This thesis is concerned with robust control of an offshore steel jacket platform subject to nonlinear wave-induced forces. Since time delay and uncertainty are inevitably encountered for an offshore structure and their existence may induce instability, oscillation and poor performance, it is very significant to study on how the delay and uncertainty affect the offshore structure. In this thesis, a memory robust control strategy is, for the first time, proposed to reduce the internal oscillations of the offshore structure under wave-induced forces, so as to ensure the safety and comfort of the offshore structure. Firstly, when the system's states are adopted as feedback, memory state feedback controllers are introduced for the offshore structure. By using Lyapunov-Krasovskii stability theory, some delay-dependent stability criteria have been established, based on which, and by combining with some linearization techniques, memory state feedback controllers are designed to control the offshore structure. The simulation results show that such controllers can effectively reduce the internal oscillations of the offshore structure subject to nonlinear wave-induced forces and uncertainties. On the other hand, a new Lyapunov-Krasovskii functional is introduced to derive a less conservative delay-dependent stability criterion. When this criterion is applied to the offshore structure, an improved memory state feedback controller with a small gain is obtained to control the system more effectively, which is sufficiently shown by the simulation. Secondly, when the system's outputs are adopted as feedback, memory dynamic output feedback controllers are considered for the offshore structure. By employing a projection theorem and a cone complementary linearization approach, memory dynamic output feedback controllers are derived by solving some nonlinear minimization problem subject to some linear matrix inequalities. The simulation results show that the internal oscillations of the offshore structure subject to nonlinear wave-induced forces are well attenuated. Finally, robust H control is fully investigated for the offshore structure. By employing Lyapunov-Krasovskii stability theory, some delay-dependent bounded real lemmas have been obtained, under which, via a memory state feedback controller or a dynamic output feedback controller, the resulting closed-loop system is not only asymptotically stable but also with a prescribed disturbance attenuation level. The simulation results illustrate the validity of the proposed method.

Dans cette thèse, ma contribution se concentre sur le développement d’une méthodologie pour le contrôle intelligent de la température maximale dans un réacteur tubulaire. Ces expressions sont dérivées d'un modèle analytique précédemment publié par (Vernières-Hassimi et al., 2016) et ont été adaptées et simplifiées pour leur application dans ce contexte. La première expression analytique développée concerne le calcul de la position de la température maximale de réaction, un paramètre fondamental pour la sécurité dans les réacteurs tubulaires. Cette expression permet d'analyser le comportement du point chaud à l'intérieur du réacteur et comment sa position varie en fonction des changements dans les paramètres d'entrée, ce qui facilite une sélection plus appropriée des configurations opérationnelles. De plus, cette expression s'intègre avec la formule précédemment développée par (Vernières-Hassimi et al., 2016). La deuxième expression est le résultat d'une résolution de l'équation originale, par laquelle on calcule la température de refroidissement du réacteur. Cette expression est particulièrement utile pour déterminer la température de refroidissement face à des variations des conditions opérationnelles, fournissant ainsi un outil efficace pour la gestion thermique du système
In this thesis, my contribution focuses on the development of a methodology for intelligent control of the maximum temperature in a tubular reactor. These expressions are derived from an analytical model previously published by (Vernières-Hassimi et al., 2016) and have been adapted and simplified for their application in this context. The first analytical expression developed concerns the calculation of the position of the maximum reaction temperature, a fundamental parameter for safety in tubular reactors. This expression allows for the analysis of the behaviour of the hot spot inside the reactor and how its position varies according to changes in input parameters, which facilitates a more appropriate selection of operational configurations. Furthermore, this expression integrates with the formula previously developed by (Vernières-Hassimi et al., 2016). The second expression results from a resolution of the original equation, through which the reactor's cooling temperature is calculated. This expression is particularly useful for determining the cooling temperature in response to variations in operational conditions, thus providing an effective tool for the thermal management of the system

[Partial abstract]: Human-wildlife conflict is a widely observed phenomenon and encompasses a range of negative interactions between humans and wildlife. Depredation upon livestock and game species proves to be the prevalent form of this conflict and often results in the killing of carnivores. Within the South African context, despite intense lethal control, two sympatric mesopredators, the blackbacked jackal (Canis mesomelas) and the caracal (Caracal caracal), remain common enough to be considered a major threat to human livelihoods through depredation. Wildlife ranches and livestock farms dominate the landscape in the Eastern Cape Province. Moreover, human-predator conflict within the region is extensive as both the black-backed jackal and caracal are seen to be inimical by landowners. Understanding this conflict is essential for mitigating any potential adverse environmental reactions (i.e. range collapses or extinctions) and requires knowledge of anthropogenic, ecological and environmental factors. I interviewed 73 land owners across five municipal boundaries in the Eastern Cape to quantify perceptions of predator control methods.

Made available in DSpace on 2014-06-11T19:27:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2012Bitstream added on 2014-06-13T18:56:58Z : No. of bitstreams: 1 juliano_pgrp_me_mar.pdf: 511993 bytes, checksum: 77698c152ce87cdce6f50fc235e1d5aa (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho trata da política de segurança dos Estados Unidos da América (EUA) após os atentados terroristas de 11 de setembro de 2001 e tem como objeto de pesquisa a influência da mídia, em especial da série 24 Horas na aprovação e legitimação da Doutrina Bush. O objetivo geral da pesquisa é verificar as questões e fatores que propiciaram a aprovação da política antiterrorista, e mais especificamente, apresentar a formulação da guerra ao terror como resultado de uma série de fatores políticos e sociais. Pretende-se verificar a evolução da política de segurança dos EUA e entender de que maneira a mídia criou um ambiente que propiciou a aceitação de uma política extrema que dificilmente seria aprovada em tempos normais. Além disso, buscar-se-á apontar que a série 24 Horas, famosa pela abordagem contraterrorista, apresentou ao público uma resposta ao trauma sofrido pelos ataques, colocando-o de frente com o problema a cada episódio. O episódio inicial, que estreou dois meses depois do 11 de setembro, abordava de maneira dramática e explícita o terrorismo. Após o sucesso inicial, continuou por mais oito temporadas de grande audiência. O argumento central deste trabalho é que a análise sistemática de uma produção midiática de sucesso contribui para o entendimento do estado tenso e inseguro que os americanos viveram após setembro de 2001 e que os canais de comunicação foram essenciais para a política antiterror ser legitimada – a Doutrina Bush. 24 Horas auxiliou a criar o ambiente de terror e insegurança que marcou os EUA e o mundo depois do 11/09
This paper discusses the security policy of the United States of America (USA) after the terrorist attacks of September 11th 2001 and has as its object of study the influence of media, especially the series 24 Hours in the approval and legitimacy of the Bush Doctrine. The objective of the research is to examine the matters and factors that favored to the adoption of counter-terrorism policy, and more specifically, the present formulation of the war on terror as a result of a series of political and social factors. It is intended to verify the evolution of U.S. security policy and understand how the media has created an environment that facilitated the acceptance of an extreme policy that could hardly be adopted in normal times. Furthermore, it will seek to point out that the series 24 Hours, famous for counterterrorism approach, presented to the public response to the trauma suffered by the attacks, putting it face to face with the problem every episode. The initial episode, which premiered two months after the September 11th, addressed explicitly and dramatically terrorism. After initial success, continued for eight more seasons of high ratings. The central argument of this paper is that the systematic analysis of a successful media production contributes to the understanding of tense and insecure state that Americans experienced after September 2001 and that the channels of communication were essential for the anti-terror policy to be legitimate - the Doctrine Bush. 24 Hours helped create the atmosphere of terror and insecurity that marked the U.S. and the world after 11/09

O Programa de Pós-Graduação em Relações Internacionais é instituído em parceria com a Unesp/Unicamp/PUC-SP, em projeto subsidiado pela CAPES, intitulado "Programa San Tiago Dantas"
Orientador: Marco Aurélio Nogueira
Banca: Luis Fernando Ayabe
Banca: Antonio Pedro Tota
Resumo: Este trabalho trata da política de segurança dos Estados Unidos da América (EUA) após os atentados terroristas de 11 de setembro de 2001 e tem como objeto de pesquisa a influência da mídia, em especial da série 24 Horas na aprovação e legitimação da Doutrina Bush. O objetivo geral da pesquisa é verificar as questões e fatores que propiciaram a aprovação da política antiterrorista, e mais especificamente, apresentar a formulação da guerra ao terror como resultado de uma série de fatores políticos e sociais. Pretende-se verificar a evolução da política de segurança dos EUA e entender de que maneira a mídia criou um ambiente que propiciou a aceitação de uma política extrema que dificilmente seria aprovada em tempos normais. Além disso, buscar-se-á apontar que a série 24 Horas, famosa pela abordagem contraterrorista, apresentou ao público uma resposta ao trauma sofrido pelos ataques, colocando-o de frente com o problema a cada episódio. O episódio inicial, que estreou dois meses depois do 11 de setembro, abordava de maneira dramática e explícita o terrorismo. Após o sucesso inicial, continuou por mais oito temporadas de grande audiência. O argumento central deste trabalho é que a análise sistemática de uma produção midiática de sucesso contribui para o entendimento do estado tenso e inseguro que os americanos viveram após setembro de 2001 e que os canais de comunicação foram essenciais para a política antiterror ser legitimada - a Doutrina Bush. 24 Horas auxiliou a criar o ambiente de terror e insegurança que marcou os EUA e o mundo depois do 11/09
Abstract: This paper discusses the security policy of the United States of America (USA) after the terrorist attacks of September 11th 2001 and has as its object of study the influence of media, especially the series 24 Hours in the approval and legitimacy of the Bush Doctrine. The objective of the research is to examine the matters and factors that favored to the adoption of counter-terrorism policy, and more specifically, the present formulation of the war on terror as a result of a series of political and social factors. It is intended to verify the evolution of U.S. security policy and understand how the media has created an environment that facilitated the acceptance of an extreme policy that could hardly be adopted in normal times. Furthermore, it will seek to point out that the series 24 Hours, famous for counterterrorism approach, presented to the public response to the trauma suffered by the attacks, putting it face to face with the problem every episode. The initial episode, which premiered two months after the September 11th, addressed explicitly and dramatically terrorism. After initial success, continued for eight more seasons of high ratings. The central argument of this paper is that the systematic analysis of a successful media production contributes to the understanding of tense and insecure state that Americans experienced after September 2001 and that the channels of communication were essential for the anti-terror policy to be legitimate - the Doctrine Bush. 24 Hours helped create the atmosphere of terror and insecurity that marked the U.S. and the world after 11/09
Mestre

La démarche d'accréditation JACIE est une démarche volontaire à laquelle se soumettent des programmes de greffe de cellules souches hématopoïétiques (CSH), couvrant les trois activités partenaires (clinique, prélèvement de cellules et ingénierie cellulaire) et leurs interfaces. L'objectif est d'assurer un niveau minimal de qualité, de gestion des risques et d'harmonisation dans la mise en oeuvre des programmes de greffe de CSH en onco-hématologie. La construction et l'exploitation des indicateurs qualité doivent démontrer des progrès objectifs en matière de qualité et de sécurité des soins en retour des investissements consentis pour la mise en place de la démarche JACIE. Dans ce travail, nous proposons d'identifier et d'évaluer la pertinence des indicateurs mis en place dans le cadre de la démarche JACIE à mesurer des bénéfices tangibles (matériels et immatériels) tant pour les patients receveurs d'une greffe, que pour l'établissement de santé qui contribue à leur prise en charge. Pour cela, une enquête a été diffusée auprès de 82 centres accrédités JACIE en France puis dans les autres pays d'Europe. Dans le cadre de l'évaluation des soins pour laquelle la mis en place d'indicateurs est une approche de gestion des risques, nous avons cherché à déterminer si d'une part la construction des indicateurs dans les centres avait suivi une méthodologie de référence et d'autre part si tous les processus à risque de la greffe de CSH faisaient l'objet d'une surveillance
JACIE relies on transplant programs voluntarily applying for accreditation: it is important to understand that programs, rather than centres, apply meaning that all three infrastructures and teams (cell collection, cell processing and patient care unit) jointly engage in the accreditation process. The purpose of JACIE standards is to ensure a minimal level of quality, and harmonize laboratory and clinical practices in the field of onco-hematology. Implementation and follow-up of indicators do not necessarily reflect on quality and safety of patient care. The first aim of this study is to identify indicators set in place by the programs and to assess how their measure could be translated in qualitative benefit or quantitative benefit for the patient or the hospital. A survey was launched to 82 programs that were holding a valid accreditation, starting with French centres, and then extending to accredited programs in other European countries. Quality indicator is a tool for assessing healthcare delivery and indicator approach is commonly employed for risk management in healthcare systems. Thus, the second aim of this study is to understand whether a method was used to implement efficiently the indicators and to evaluate if all the HSCT processes are monitored

La littérature américaine est en mouvement constant. Elle cherche des pistes, des issues et des histoires évoquant ou transgressant la réalité. Depuis l’arrivée des premiers colons, l’influence des auteurs européens ne s’est jamais démentie sur les futurs natifs d’une terre en pleine expansion. Progressivement voué à l’exploration et à la découverte de l’intériorité de l’homme, l’auteur décrit les multiples évolutions métamorphosant la terre et les consciences. S’affranchir des lieux communs afin de s’approcher au plus près du mythe ultime – à savoir le « Grand Roman américain » – est une manière pour les écrivains du Nouveau Monde d’entrer dans la légende en s’appropriant le langage. Grâce à Jack London et la Beat Generation, écrire est synonyme de témoignage, la langue étant perpétuellement à réinventer. Libérer l’écriture de ses entraves est bien plus qu’un simple projet, c’est en quelque sorte un moyen d’émanciper la page. Du voyage clandestin dans les wagons de marchandises à la glorification du verbe neuf, la route tient toute ses promesses
American literature is a constant flux. It is looking for new paths, exits and stories evoking or transgressing reality. Since the arrival of the first settlers, the influence of European authors on the future natives of this always-expanding country has never waned. As he progressively devoted himself to the discovery and exploration of the interiority of Man, the author has described the multiple evolutions which transformed both the land and the minds. Freeing oneself from commonplace ideas in order to get closer to the ultimate myth – that is, the “Great American Novel” – is a way for the writers of the New World to go down in history by taking full ownership of the language itself. Thanks to Jack London and the Beat Generation, writing has become a byword for testimony, as the language has continuously been reinvented. Freeing writing from its shackles is much more than a simple project, it is a way to liberate the novel. From illegal trips in freight cars to the glorification of a new Word, the road has kept all its promises

La première partie de cette étude concerne l'écriture d'un modèle simplifié mais suffisamment pertinent pour être représentatif du comportement d'un réacteur chimique semi-fermé et de son contenu. La seconde partie présente la mise en oeuvre d'un logiciel destiné à la simulation, l'estimation paramétrique, l'optimisation et la commande de procédés de la chimie fine à partir de ce modèle qui, dans un but de généralisation, est mis sous la forme d'équation d'état et formellement linéarisé. Le programme écrit en langage orienté objet C++, de conception modulaire et évolutive, autorise l'extension du système constitué du réacteur et du mélange réactionnel à d'autres éléments tels qu'une colonne de rectification. Il permet également d'envisager, sans trop de difficulté, le passage au réacteur continu. Il utilise pour le calcul une représentation matricielle des données qui se traduit par une exploitation des résultats de l'automatique plus aisée. La validation du modèle, menée dans des réacteurs en acier émaillé et en verre d'une capacité de cinq litres, a été opérée pour des séquences de chauffage et de refroidissement d'espèces inertes, la synthèse du diacétate de résorcinol et une réaction acide fort-base forte. Des études effectuées en parallèle ont utilisé ce programme sur des systèmes réactionnels plus complexes, de polycondensation, mis en oeuvre sur d'autres réacteurs (en acier inoxydable de 10 litres), les résultats obtenus ont été satisfaisants. Une installation pilote, dont le système de chauffage-refroidissement est basé sur le principe du mono-fluide, a été réalisée. Des régulateurs simples, implantés sur un automate programmable, permettent le contrôle de la température du fluide caloporteur. L'architecture matérielle retenue pour le contrôle et la commande de l'installation pilote propose l'insertion d'un calculateur dans le schéma classique constitué d'un superviseur et d'un automate programmable. Le dialogue entre ces trois éléments est opérationnel et permet la conduite de l'installation pilote en mode manuel ou automatique

Cette étude explore les relations entre la "Beat Generation" et l'art. Elle se penche principalement sur les oeuvres plastiques de William S. Burroughs (1914-1997), Jack Kerouac (1922-1969) et Allen Ginsberg (1926-1997). La période choisie pour cette recherche débute en 1944 et se poursuit jusqu'en 1975, c'est-à-dire de la formation du groupe à la fin de l'idée de contre-culture. L'analyse ne se limite pas à la constatation d'un va-et-vient entre le mot et l'image, mais démontre que les écrivains de la "Beat Generation" sont en prise direct avec l'art de l'époque et vont explorer toutes les techniques plastiques pour exprimer en dehors de leur œuvre littéraire. En abordant l'aventure artistique, les trois "Beats" sont confrontés à la notion d'"ekphrasis": ils prolongent un long héritage à travers des disciplines artistiques différentes: la peinture, le croquis ou la technique du collage
This study exlpores the relationship between art and the "Beat Generation". It mainly focuses on the plastic works of William S. Burroughs (1914-1997), Jack Kerouac (1922-1969)and en Ginsberg (1926-1997). The field of research covers the period from 1944 to 1975, i.e. from the formation of the Group to the end of the idea of counterculture. The analysis does not limit itself to the description of the back and forth movements between literature and the arts. The "Beat Generation" writers were in fact directly connected to the art of their time and explored all kinds of plastic techniques to express themselves independently from their lierary works. In addressing the adventures of the artistic experience, the three "Beats" were confronted with the notion of "ekphrasis" and obviously prolonged an old legacy through different artistic disciplines like painting, drawing or collage

During the Peninsular War (1808-1814) the Spanish launched an unprecedented guerrilla insurgency that undermined Napoleon’s grip on that state. The advent of this novel and illegal “system” of warfare ushered in an era of military studies on the use of unconventional strategies in military campaigns – and changed the modern rules of war. A generation later during the Mexican-American War (1846-1848), Henry Halleck and Winfield Scott used the knowledge from the Peninsular War to implement an innovative “conciliatory” counterinsurgency program directed at the Mexican people – which set the U.S. doctrinal standard informing an international consensus on the proper conduct for occupation. The Spanish war against the French influenced both belligerents in Mexico: the Mexicans tried to mount a guerrilla war modeled along Spanish lines, and the Americans adapted their tactics, rules, and laws of war between 1808 to 1848 to avoid the disastrous imperial overreach exemplified by the French in Spain.
Durante la Guerra de la Independencia (1808-1814), los españoles lanzaron una insurgencia guerrillera sin precedentes que socavó el control de Napoleón sobre ese estado. El advenimiento de este “sistema” de guerra novedoso e ilegal marcó el comienzo de una era de estudios militares sobre el uso de estrategias no convencionales en campañas militares, y cambió las reglas modernas de la guerra. Una generación más tarde, durante la Guerra México-Estadounidense (1846-1848), Henry Halleck y Winfield Scott utilizaron el conocimiento de la Guerra Peninsular para implementar un innovador programa de contrainsurgencia "conciliador" dirigido al pueblo mexicano, que estableció el estándar doctrinal de los Estados Unidos informando a un consenso internacional sobre la conducta adecuada para la ocupación. La guerra española contra los franceses influyó en ambos beligerantes en México: los mexicanos intentaron montar una guerra de guerrillas siguiendo el modelo español, y los estadounidenses adaptaron sus tácticas, reglas y leyes de guerra entre 1808 y 1848 para evitar la desastrosa extralimitación imperial ejemplificada por los franceses en españa.

"This thesis is concerned with robust control of an offshore steel jacket platform subject to nonlinear wave-induced forces. Since time delay and uncertainty are inevitably encountered for an offshore structure and their existence may induce instability, oscillation and poor performance, it is very significant to study on how the delay and uncertainty affect the offshore structure. In this thesis, a memory robust control strategy is, for the first time, proposed to reduce the internal oscillations of the offshore structure under wave-induced forces, so as to ensure the safety and comfort of the offshore structure. Firstly, when the system's states are adopted as feedback, memory state feedback controllers are introduced for the offshore structure. By using Lyapunov-Krasovskii stability theory, some delay-dependent stability criteria have been established, based on which, and by combining with some linearization techniques, memory state feedback controllers are designed to control the offshore structure. The simulation results show that such controllers can effectively reduce the internal oscillations of the offshore structure subject to nonlinear wave-induced forces and uncertainties. On the other hand, a new Lyapunov-Krasovskii functional is introduced to derive a less conservative delay-dependent stability criterion. When this criterion is applied to the offshore structure, an improved memory state feedback controller with a small gain is obtained to control the system more effectively, which is sufficiently shown by the simulation. Secondly, when the system's outputs are adopted as feedback, memory dynamic output feedback controllers are considered for the offshore structure. By employing a projection theorem and a cone complementary linearization approach, memory dynamic output feedback controllers are derived by solving some nonlinear minimization problem subject to some linear matrix inequalities. The simulation results show that the internal oscillations of the offshore structure subject to nonlinear wave-induced forces are well attenuated. Finally, robust H control is fully investigated for the offshore structure. By employing Lyapunov-Krasovskii stability theory, some delay-dependent bounded real lemmas have been obtained, under which, via a memory state feedback controller or a dynamic output feedback controller, the resulting closed-loop system is not only asymptotically stable but also with a prescribed disturbance attenuation level. The simulation results illustrate the validity of the proposed method." -- abstract.