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Rozprawy doktorskie na temat „Lineman safety”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Snyder, Cory Firmin. "Provable Run Time Safety Assurance for a Non-Linear System." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1369443661.

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Bandy, Rebecca Anne. "Location-Aware Adaptive Vehicle Dynamics System: Linear Chassis Predictions." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48171.

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One seminal question that faces a vehicle's driver (either human or computer) is predicting the capability of the vehicle as it encounters upcoming terrain. A Location-Aware Adaptive Vehicle Dynamics (LAAVD) System is being developed to assist the driver in maintaining vehicle handling capabilities through various driving maneuvers. In contrast to current active safety systems, this system is predictive, not reactive. The LAAVD System employs a predictor-corrector method in which the driver's input commands (throttle, brake, steering) and upcoming driving environment (terrain, traffic, weat

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Sangiorgio, Filippo. "Safety Format for Non-linear Analysis of RC Structures Subjected to Multiple Failure Modes." Doctoral thesis, KTH, Bro- och stålbyggnad, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164304.

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This thesis treats the safety format for non-linear analysis of reinforced concrete (RC) structures subjected to multiple failure modes. The purpose is to identify questions which are poorly understood and ambiguous about the behaviour of structures that may fail due to a number of possible failure modes (e.g., bending, shear, buckling, crack propagation, fatigue) which might be used as a focus for the development of a more comprehensive approach to the evaluation of the structural safety level. Nowadays non-linear analysis in concrete structures cannot be considered only as a research tool to

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Ekesiöö, Anton, and Andreas Ekhamre. "Safety formats for non-linear finite element analyses of reinforced concrete beams loaded to shear failure." Thesis, KTH, Betongbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231087.

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There exists several different methods that can be used to implement a level of safety when performing non-linear finite element analysis of a structure. These methods are called safety formats and they estimate safety by different means and formulas which are partly discussed further in this thesis. The aim of this master thesis is to evaluate a model uncertainty factor for one safety format method called the estimation of coefficient of variation method (ECOV) since it is suggested to be included in the next version of Eurocode. The ECOV method will also be compared with the most common and

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Chundi, Sai Srinivas. "APPLYING LOG-LINEAR MODELS AND GIS TO STUDY THE SAFETY OF PEDESTRIANS AND BICYCLISTS : A CASE STUDY OF ORANGE COUNTY SCHOOL CHIL." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2604.

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Abstract Pedestrian /bicycle safety of school children has been a growing menace that has been attracting attention from transportation professionals, school boards, media and the community all over the country. As such there has been a necessity to identify critical variables and assess their importance in pedestrian/bicycle crashes occurring in and around school zones. The current study is an endeavor in this direction. The literature review identified some studies that were conducted on school zone safety related to pedestrian/bicyclist crashes. Most of the studies pertained to crashes with

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Kaynama, Shahab. "Scalable techniques for the computation of viable and reachable sets : safety guarantees for high-dimensional linear time-invariant systems." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42856.

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Reachability analysis and viability theory are key in providing guarantees of safety and proving the existence of safety-preserving controllers for constrained dynamical systems. The minimal reachable tube and (by duality) the viability kernel are the only constructs that can be used for this purpose. Unfortunately, current numerical schemes that compute these constructs suffer from a complexity that is exponential in the dimension of the state, rendering them impractical for systems of dimension greater than three or four. In this thesis we propose two separate approaches that improve the sc

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Ay, Haluk. "Linear and Nonlinear Models of Human Hand-Arm Dynamics and Torque Tool Interaction." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1315418040.

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Choi, Junsung. "Latency Study and System Design Guidelines for Cooperative LTE-DSRC Vehicle-to-Everything (V2X) Communications including Smart Antenna." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/78083.

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Vehicle-related communications are a key application to be enabled by Fifth Generation (5G) wireless systems. The communications enabled by the future Internet of Vehicles (IoV) that are connected to every wireless device are referred to as Vehicle-to-Everything (V2X) communications. A major application of V2X communication systems will be to provide emergency warnings. This thesis evaluates Long-Term Evolution (LTE) and Dedicated Short Range Communications (DSRC) in terms of service quality and latency, and provides guidelines for design of cooperative LTE-DSRC systems for V2X communications.

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Zietsman, Christiaan Abraham. "A hierarchical linear elastic boundary element solver for lenticular ore bodies." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1686.

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Thesis (MSc (Mathematical Sciences. Applied Mathematics))--University of Stellenbosch, 2007.<br>South Africa is involved in huge mining operations deep in the earth's crust. Stresses induced by these mining operations may cause seismic events or rockbursts to occur, which could damage infrastructure and put miners' lives at risk. The effect of different mining layouts are modelled and used by engineers to make design decisions. The frequency at which models are updated and integrated with the decision making process is not optimal. These large mining layouts can not be modelled adequately

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Peña, Albornoz Emilio Antonio. "Implementación del programa de elementos finitos SafePy para análisis no lineal dinámico con factor de convergencia de carga." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/139269.

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Magíster en Ciencias de la Ingeniería, Mención Ingeniería Sísmica<br>Ingeniero Civil<br>En este trabajo, se presenta la implementación del programa SafePy en Python , plata- forma para el modelamiento, simulación y análisis de la respuesta de estructuras ante cargas estáticas y dinámicas. El programa se desarrolla siguiendo la filosofía de programación en base a objetos bajo Python , lo cual permite reducir el tiempo de cálculo e implementación de nuevos componentes (elementos, materiales, métodos de análisis). En este trabajo de tesis, se pretende validar la plataforma para ana

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Rösth, Marcus. "Hydraulic Power Steering System Design in Road Vehicles : Analysis, Testing and Enhanced Functionality." Doctoral thesis, Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8186.

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Demands for including more functions such as haptic guiding in power steering systems in road vehicles have increased with requirements on new active safety and comfort systems. Active safety systems, which have been proven to have a positive effect on overall vehicle safety, refer to systems that give the driver assistance in more and less critical situations to avoid accidents. Active safety features are going to play an increasingly important roll in future safety strategies; therefore, it is essential that sub systems in road vehicles, such as power steering systems, are adjusted to meet n

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Oertel, Markus [Verfasser], Achim [Akademischer Betreuer] Rettberg, Bernhard [Akademischer Betreuer] Josko, and Marcelo [Akademischer Betreuer] Götz. "A linear scaling change impact analysis based on a formal safety model for automotive embedded systems / Markus Oertel ; Achim Rettberg, Bernhard Josko, Marcelo Götz." Oldenburg : BIS der Universität Oldenburg, 2016. http://d-nb.info/1120574595/34.

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Bliss, Michael A. "Procedures to Perform Dam Rehabilitation Analysis in Aging Dams." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33157.

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There are hundreds of existing dams within the State of Virginia, and even thousands more specifically within the United States. A large portion of these dams do not meet the current safety standard of passing the Probable Maximum Flood. Likewise, many of the dams have reached or surpassed the original design lives, and are in need of rehabilitation. A standard protocol will assist dam owners in completing a dam rehabilitation analysis. The protocol provides the methods to complete the hydrologic, hydraulic, and economic analysis. Additionally, alternative augmentation techniques are disc

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14

Durieux, Johan Hendrik. "Development of a practical methodology for the analysis of gravity dams using the non-linear finite element method." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-06232009-152815/.

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Gianfelici, Alessandro. "A linear O(N) model: a functional renormalization group approach for flat and curved space." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8343/.

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In questa tesi sono state applicate le tecniche del gruppo di rinormalizzazione funzionale allo studio della teoria quantistica di campo scalare con simmetria O(N) sia in uno spaziotempo piatto (Euclideo) che nel caso di accoppiamento ad un campo gravitazionale nel paradigma dell'asymptotic safety. Nel primo capitolo vengono esposti in breve alcuni concetti basilari della teoria dei campi in uno spazio euclideo a dimensione arbitraria. Nel secondo capitolo si discute estensivamente il metodo di rinormalizzazione funzionale ideato da Wetterich e si fornisce un primo semplice esempio di applic

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Boffo, Gabriela Holz. "Formatos e técnicas de modelos de previsão de acidentes de trânsito." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/31414.

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A ampliação acelerada da demanda por transporte, mais especificamente pelo transporte rodoviário, tem provocado um aumento expressivo no número de acidentes de trânsito nesse ambiente. Consequentemente, a redução dos acidentes de trânsito tem sido um grande desafio para os pesquisadores e gestores da área rodoviária. Porém, os acidentes de trânsito são eventos complexos se considerados os diversos fatores que podem influenciá-los. Dentro desse contexto esta dissertação apresenta um estudo de modelos de previsão de acidentes, que podem ser utilizados para a avaliação do potencial de segurança e

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Trac, Steven Cy. "Robust Explicit Construction of 3D Configuration Spaces Using Controlled Linear Perturbation." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/189.

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We present robust explicit construction of 3D configuration spaces using controlled linear perturbation. The input is two planar parts: a fixed set and a moving set, where each set is bounded by circle segments. The configuration space is the three-dimensional space of Euclidean transformation (translations plus rotations) of the moving set relative to the fixed set. The goal of constructing the 3D configuration space is to determine the boundary representation of the free space where the intersection of the moving set and fixed set is empty. To construct the configuration space, we use the co

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Hedengran, Gustav, and John Kvarnefalk. "Optimal task planning in multi-vehicle systems under syntactically co-safe Linear Temporal Logic." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229802.

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Autonomous vehicles need to be able to perform different instructions during different missions and situations. For task specification, logical languages are often used. Depending on desired expressiveness, there are different methods of task specification and planning. In this paper we explore the case of multi-agent systems performing tasks specified by co-safe Linear Temporal Logic (scLTL) formulas in relation to three cost functions. Specifically, we make use of the Vehicle Routing Problem to define our problem domain. Semantics for scLTL-formulas of multiple vehicles are introduced, as we

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Stratton, Karen Marie. "The relationship between pediatric nurse staffing and quality of care in the hospital setting /." Connect to full text via ProQuest. IP filtered, 2005.

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Thesis (Ph.D. in Nursing) -- University of Colorado, 2005.<br>Typescript. Includes bibliographical references (leaves 198-212). Free to UCDHSC affiliates. Online version available via ProQuest Digital Dissertations;

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Dalamagkidis, Konstantinos. "Autonomous vertical autorotation for unmanned helicopters." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003147.

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SCOZZESE, FABRIZIO. "AN EFFICIENT PROBABILISTIC FRAMEWORK FOR SEISMIC RISK ANALYSIS OF STRUCTURAL SYSTEMS EQUIPPED WITH LINEAR AND NONLINEAR VISCOUS DAMPERS." Doctoral thesis, Università degli Studi di Camerino, 2018. http://hdl.handle.net/11581/429547.

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Seismic passive protection with supplemental damping devices represents an efficient strategy to produce resilient structural systems with improved seismic performances and notably reduced post-earthquake consequences. Such strategy offers indeed several advantages with respect to the ordinary seismic design philosophy: structural damages are prevented; the safety of the occupants is ensured and the system remains operational both during and right after the earthquake; no major retrofit interventions are needed but only a post-earthquake inspection (and if necessary, replacement) of dissipatio

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Vasconcelos, Geilson Márcio Albuquerque de. "Verificação simultânea dos estados limites últimos e de serviço em análises não-lineares de peças de concreto armado submetidas à flexão pura." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-10062005-150528/.

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Neste trabalho foram discutidos os aspectos de dimensionamento e verificação da segurança de elementos estruturais de concreto armado considerando a não-linearidade dos materiais. O estudo abordou uma nova proposta para a verificação simultânea dos estados limites últimos (ELU) e dos estados limites de serviço (ELS) para elementos de concreto armado submetidos à flexão, voltada especialmente para aplicações considerando a não-linearidade física utilizando o método dos elementos finitos. As propostas alternativas apresentadas na consideração de coeficientes minoradores das resistências dos mate

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Cai, Qingbo. "Finite element modelling of cracking in concrete gravity dams." Thesis, Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-01302008-160623.

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Tran, Tuan H. "Landing-Gear Impact Response: A Non-linear Finite Element Approach." UNF Digital Commons, 2019. https://digitalcommons.unf.edu/etd/896.

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The primary objective of this research is to formulate a methodology of assessing the maximum impact loading condition that will incur onto an aircraft’s landing gear system via Finite Element Analysis (FEA) and appropriately determining its corresponding structural and impact responses to minimize potential design failures during hard landing (abnormal impact) and shock absorption testing. Both static and dynamic loading condition were closely analyzed, compared, and derived through the Federal Aviation Administration’s (FAA) airworthiness regulations and empirical testing data. In this resea

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Neuwirth, Zdeněk. "Simulátor pro ověření funkce bezpečnostních pásů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228668.

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Thesis is oriented on project construction universal apparatus for introduction and research effects deceleration and impact with possibility setting initial velocity. Basic application proposed test station is crash simulation for diagnostic safety belts. At first there're in work presented physical value that describe action in progress at impact, further safety belts, their testing and test . Considerable volume of work is devoted to project actuation, system obstruction kinetic energy and basic construction. Subsequently is presented proposed construction and performed strenght calculation

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Pedrosa, Thaís Gomes. "Otimização estrutural sob incertezas considerando consequências de falha." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-24042015-144515/.

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Enfrentar situações de falha é o principal desafio do engenheiro estrutural. Parece paradoxal, mas a fim de obter um projeto bem sucedido, o engenheiro estrutural deve estudar e examinar todos os possíveis modos de falha de uma estrutura. Na otimização estrutural não é diferente. Assim, na otimização estrutural deve-se considerar os custos esperados de falha. No projeto de engenharia estrutural, economia e segurança são aparentemente objetivos conflitantes. No entanto, quando custos esperados de falha são considerados, nota-se que investimentos em segurança são necessários a fim de não arcar c

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Jinbo, Maro. "Imagens ultra-sônicas em modo-B com técnicas de abertura focal sintética - SAFT." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-12072007-183723/.

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Este trabalho trata do estudo e aplicação da técnica de abertura focal sintética (SAFT) na geração de imagens por ultra-som em modo-B com transdutores matriciais lineares, para aplicação em ensaios não destrutivos. Sinais em modo-A são adquiridos e armazenados correspondentes ao meio inspecionado. Implementaram-se duas estratégias de processamento baseadas no método SAFT. A primeira consiste em um elemento central do array emitindo e todos recebendo, resultando em imagens com uma baixa energia acústica envolvida. A outra estratégia considera cada um dos elementos do array emissores e receptore

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Galichet, Nicolas. "Contributions to Multi-Armed Bandits : Risk-Awareness and Sub-Sampling for Linear Contextual Bandits." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112242/document.

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Cette thèse s'inscrit dans le domaine de la prise de décision séquentielle en environnement inconnu, et plus particulièrement dans le cadre des bandits manchots (multi-armed bandits, MAB), défini par Robbins et Lai dans les années 50. Depuis les années 2000, ce cadre a fait l'objet de nombreuses recherches théoriques et algorithmiques centrées sur le compromis entre l'exploration et l'exploitation : L'exploitation consiste à répéter le plus souvent possible les choix qui se sont avérés les meilleurs jusqu'à présent. L'exploration consiste à essayer des choix qui ont rarement été essayés, pour

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Chen, Chen. "Evaluating Time-varying Effect in Single-type and Multi-type Semi-parametric Recurrent Event Models." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64371.

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This dissertation aims to develop statistical methodologies for estimating the effects of time-fixed and time-varying factors in recurrent events modeling context. The research is motivated by the traffic safety research question of evaluating the influence of crash on driving risk and driver behavior. The methodologies developed, however, are general and can be applied to other fields. Four alternative approaches based on various data settings are elaborated and applied to 100-Car Naturalistic Driving Study in the following Chapters. Chapter 1 provides a general introduction and background o

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Zhao, Jingzhou. "An economic evaluation of the Safe Motherhood programme in Guangxi, China." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/45782/1/Jingzhou_Zhao_Thesis.pdf.

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Maternal and infant mortality is a global health issue with a significant social and economic impact. Each year, over half a million women worldwide die due to complications related to pregnancy or childbirth, four million infants die in the first 28 days of life, and eight million infants die in the first year. Ninety-nine percent of maternal and infant deaths are in developing countries. Reducing maternal and infant mortality is among the key international development goals. In China, the national maternal mortality ratio and infant mortality rate were reduced greatly in the past two decades

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31

Mareček, Petr. "Robotický stolní fotbal." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254394.

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The aim of this diploma thesis is the design of robotic table football with the realization of the construction and control a single axis of table football. In introduction are described previously developed solutions. Next chapters contain a selection of specific gaming table and specification of linear, rotary motor. There are presented design visions with the placement of selected component together with proposal location of sensor system for ball detection. In the end of design section is specification and solution of placement safety features. The programming part of the thesis involves t

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Amiridis, Kiriakos. "THE USE OF 3-D HIGHWAY DIFFERENTIAL GEOMETRY IN CRASH PREDICTION MODELING." UKnowledge, 2019. https://uknowledge.uky.edu/ce_etds/85.

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The objective of this research is to evaluate and introduce a new methodology regarding rural highway safety. Current practices rely on crash prediction models that utilize specific explanatory variables, whereas the depository of knowledge for past research is the Highway Safety Manual (HSM). Most of the prediction models in the HSM identify the effect of individual geometric elements on crash occurrence and consider their combination in a multiplicative manner, where each effect is multiplied with others to determine their combined influence. The concepts of 3-dimesnional (3-D) representatio

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Maisonneuve, Vivien. "Analyse statique des systèmes de contrôle-commande : invariants entiers et flottants." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0007/document.

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Un logiciel critique est un logiciel dont le mauvais fonctionnement peut avoir un impact important sur la sécurité ou la vie des personnes, des entreprises ou des biens.L'ingénierie logicielle pour les systèmes critiques est particulièrement difficile et combine différentes méthodes pour garantir la qualité des logiciels produits.Parmi celles-ci, les méthodes formelles peuvent être utilisées pour prouver qu'un logiciel respecte ses spécifications.Le travail décrit dans cette thèse s'inscrit dans le contexte de la validation de propriétés de sûreté de programmes critiques, et plus particulièrem

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Schüller, Hagen. "Modelle zur Beschreibung des Geschwindigkeitsverhaltens auf Stadtstraßen und dessen Auswirkungen auf die Verkehrssicherheit auf Grundlage der Straßengestaltung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-61493.

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Die vorliegende Dissertationsschrift widmet sich der Beschreibung des Geschwindigkeits-verhaltens von Kraftfahrern auf innerörtlichen Straßen sowie dessen Auswirkungen auf die Verkehrssicherheit. Grundlage bilden manuelle und automatische Querschnittsmessungen von Einzelgeschwindigkeiten in Hauptverkehrs- und Erschließungs¬straßen mit zulässigen Höchstgeschwindigkeiten von 50 bzw. 30 km/h. Die Beschreibung von Wunschgeschwindigkeiten über unterschiedliche Abgrenzungen freifahrender Fahrzeuge, deren Geschwindigkeiten die Grundlage für die folgenden Modelle bilden, sowie die Überprüfung der Über

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Bukovský, Petr. "Posouzení kyvných podpěr turbíny z hlediska vzniku MS deformační stability." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230263.

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Master thesis deals with a computing simulation of two props turbines lines. The thesis output is gaining maximum possible load, at which a commencement of deformation stability critical state for various geometrical imperfections has not arisen yet. The calculation has been done by FEM in two different ways: linear solution (using a calculation conversion into eigenbuckling) and nonlinear solution (using a FEM deformation option). Result analysis compares both methods outcomes. Safety factor for the props operation has been proposed taking into consideration known influences on operating stat

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Spasoje, Mićić. "Предиктивни модел фреквенције саобраћајних незгода на руралним путевима". Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=111092&source=NDLTD&language=en.

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Примарни задатак ове докторске дисертације је развој предиктивногмодела фреквенције саобраћајних незгода на руралним путевима.Секундарни циљ је процјена ефеката саобраћајних и геометријскихваријабли на фреквенцију саобраћајних незгода. Резултатиистраживања су показали да је најбоље перформансе, у погледуслагања са стварним подацима и предвиђања саобраћајних незгода, уодносу на друге конкурентске моделе показао НБ модел. Постављеноограничење брзине има највећи релативни утицај на фреквенцијуукупног броја саобраћајних незгода и саобраћајних незгода санастрадалим лицима. На фреквенцију саобраћајн

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Marcus, Ventovaara, and Hasanbegović Arman. "A Method for Optimised Allocation of System Architectures with Real-time Constraints." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-39492.

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Optimised allocation of system architectures is a well researched area as it can greatly reduce the developmental cost of systems and increase performance and reliability in their respective applications.In conjunction with the recent shift from federated to integrated architectures in automotive, and the increasing complexity of computer systems, both in terms of software and hardware, the applications of design space exploration and optimised allocation of system architectures are of great interest.This thesis proposes a method to derive architectures and their allocations for systems with r

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Tillet, Joris. "Safe localization and control of a towed sensor." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2021. http://www.theses.fr/2021ENTA0013.

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L’exploration des océans devient de plus en plus accessible, notamment grâce aux avancées en robotique. Les applications pour les robots sous-marins sont nombreuses. Dans cette thèse, on s’intéresse particulièrement à la recherche d’épaves, telle que celle de La Cordelière, qui a coulé dans la Rade de Brest en 1512. Le système robotique proposé consiste à tracter un magnétomètre susceptible de détecter les matériaux ferromagnétiques de l’épave. Le capteur ne peut pas être directement embarqué car il est sensible aux perturbations du robot. C’est pourquoi il est déporté. Deux problématiques son

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Altinok, Yahya Kemal. "Simulation And Performance Evaluation Of A Fast And High Power Pulsed Laser Diode Driver For Laser Range Finder." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614346/index.pdf.

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Laser Diodes (LDs) are semiconductor coherent lightening devices which are widely used in many fields such as defence, industry, medical and optical communications. They have advantageous characteristics such as having higher electrical-to-optical and optical-to-optical conversion efficiencies from pump source to useful output power when compared to flash lamps, which makes them the best devices to be used in range finding applications. Optical output power of lasers depends on current through LDs. Therefore, there is a relationship between operating life and work performance of LDs and perfor

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Lopard, Gabriel. "Conception et dimensionnement des ouvrages souterrains dans les massifs rocheux discontinus – Développement de la méthode des blocs isolés." Electronic Thesis or Diss., Université Paris sciences et lettres, 2021. http://www.theses.fr/2021UPSLM014.

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De nombreux secteurs d’activités impliquent une occupation de l’espace souterrain. Le creusement dans un massif rocheux présente différents modes de ruine qu’il faut savoir identifier pour utiliser les outils de conception adaptés. Parmi eux, l’instabilité de blocs est un problème courant dans les massifs rocheux fracturés. Les approches numériques de blocs multiples permettent de considérer le massif dans son ensemble mais leur utilisation peut s’avérer lourde et requiert beaucoup de données d’entrée parfois indisponibles. L’approche Isobloc est basée sur le concept de bloc isolé et, comparée

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Valero, Rafael. "Essays on Sparse-Grids and Statistical-Learning Methods in Economics." Doctoral thesis, Universidad de Alicante, 2017. http://hdl.handle.net/10045/71368.

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Compuesta por tres capítulos: El primero es un estudio sobre la implementación the Sparse Grid métodos para es el estudio de modelos económicos con muchas dimensiones. Llevado a cabo mediante aplicaciones noveles del método de Smolyak con el objetivo de favorecer la tratabilidad y obtener resultados preciso. Los resultados muestran mejoras en la eficiencia de la implementación de modelos con múltiples agentes. El segundo capítulo introduce una nueva metodología para la evaluación de políticas económicas, llamada Synthetic Control with Statistical Learning, todo ello aplicado a políticas partic

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Parák, Roman. "Robotický stolní fotbal - herní strategie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320069.

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The aim of the master's thesis is the robotic table football device modification and the design of game strategies. The thesis was extended by the design of technology for the robotic table football safety and the design of the Human Machine Interface (HMI). In the introduction so far developed solutions and presentation of the B&R Automation company are described. The following chapters describe mechanical solution modification, electrical wiring diagram design, creating simulation in the MATLAB development environment, resolving security issues and the subsequent application of a solution in

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Hjertström, Albin, and Vilhelm Simoni. "Elscootrar och säkerhet : Produktutvecklingens påverkan av lagar och säkerhetskrav i Sverige." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279766.

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Sedan etableringen 2017 har en drastisk ökning av elscootrar skett i Sverige och framförallt i Stockholms innerstad. Denna radikala förändring inom färdmedel har skakat om den rådande trafikmiljön. Olyckor och parkeringsproblematik har stått i fokus för medias rapportering kring fenomenet. Syftet med denna rapport är att undersöka hur företagen som utvecklar elscootrar arbetar med säkerhet för användarna och anpassar sin produktutveckling efter svenska lagar och trafikregler. Studien behandlar även hur man på ett säkert sätt kan integrera nya färdmedel i samhället. För att lägga en grund för a

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Решетченко, А. І. "Підвищення екологічної безпеки урбосистем при техногенному навантаженні від шумового забруднення". Thesis, Харківський національний університет міського господарства імені О.М. Бекетова, 2020. https://essuir.sumdu.edu.ua/handle/123456789/80189.

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Дисертація присвячена розробці науково-практичних засад управління екологічною безпекою територій сельбищних зон урбосистем з метою зниження техногенного навантаження у разі шумового забруднення. У результаті проведених досліджень розроблено уніфіковані схеми розташування контрольних точок із визначення рівнів шумового забруднення з урахуванням архітектурно-ландшафтного планування досліджуваних територій для проведення експериментальних досліджень. Цей підхід дозволив розробити універсальну математичну модель, що враховує інтегральний показник внеску смуг зелених насаджень у зниження шуму та м

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Aurich, Allan. "Modelle zur Beschreibung der Verkehrssicherheit innerörtlicher Hauptverkehrsstraßennetze unter besonderer Berücksichtigung der Umfeldnutzung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-125311.

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In der Arbeit wird eine Methodik einer zusammenhängenden Analyse und modellhaften Beschreibung der Verkehrssicherheit in städtischen Hauptstraßennetzen am Beispiel der Stadt Dresden entwickelt. Die dabei gewonnenen Modelle dienen der Abschätzung von Erwartungswerten von Unfallhäufigkeiten mit und ohne Personenschaden unter Berücksichtigung der Verkehrsbeteiligungsart. Die Grundlage bilden multivariate Regressionsmodelle auf Basis verallgemeinerter linearer Modelle (GLM). Die Verwendung verallgemeinerter Regressionsmodelle erlaubt eine Berücksichtigung von Verteilungen, die besser geeignet sind

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Menchel, Kfir. "Progressive collapse: comparison of main standards, formulation and validation of new computational procedures." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210452.

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Throughout recent history, famous records of building failures may be found, unfortunately accompanied by great human loss and major economic consequences. One of the mechanisms of failure is referred to as ‘progressive collapse’: one or several structural members suddenly fail, whatever the cause (accident or attack). The building then collapses progressively, every load redistribution causing the failure of other structural elements, until the complete failure of the building or of a major part of it. The civil engineering community’s attention to this type of event was first drawn by the pr

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Medjoudi, Malika. "Contribution à l'analyse des systèmes pilotés par calculateur : extraction de scénarios redoutés et vérification de contraintes temporelles." Toulouse 3, 2005. http://www.theses.fr/2006TOU30026.

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Mes travaux de thèse sont placés dans le cadre de la fiabilité dynamique. L'objectif est de réaliser une analyse qualitative de la sûreté de fonctionnement des systèmes pilotés par calculateurs pour extraire des scénarios menant à des états redoutés. Il s'agit de caractériser ces scénarios au plus tôt dans la phase de conception, ce qui permet d'évaluer leurs probabilités d'occurrence pour valider l'architecture du système. Nous proposons une approche basée sur la logique linéaire et les Réseaux de Petri Prédicats Transitions Différentiels Stochastiques. Cette approche tient partiellement comp

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Gigan, Daniel. "Modélisation des comportements d'un pilote expert en situation de collision en vol vers une nouvelle technologie "voir et éviter" pour les drones : Pour un fonctionnalisme holistique à vocation intégrative." Thesis, Toulouse, ISAE, 2013. http://www.theses.fr/2013ESAE0022.

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Le principe du “Voir et Eviter” est un principe essentiel pour la sécurité de l'espace aérienet nécessaire pour l'insertion des drones dans la Circulation Aérienne Générale (CAG). Lessolutions actuelles ne permettent pas toujours d'appliquer le principe du "Voir et Eviter" etn'assurent pas, par leurs actions d'évitements, une cohabitation sans risques des drones et desavions pilotés dans la CAG. Ces mêmes solutions ne permettent pas, avec un seul capteurpassif, la détermination, à tout moment, du temps restant avant collision. Ce temps estessentiel pour qualifier la dangerosité de la situation

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Geamanu, Marcel-Stefan. "Estimation and dynamic longitudinal control of an electric vehicle with in-wheel electric motors." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00871231.

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The main objective of the present thesis focuses on the integration of the in-wheel electric motors into the conception and control of road vehicles. The present thesis is the subject of the grant 186-654 (2010-2013) between the Laboratory of Signals and Systems (L2S-CNRS) and the French Institute of Petrol and New Energies (IFPEN). The thesis work has originally started from a vehicular electrification project, equipped with in-wheel electric motors at the rear axle, to obtain a full electric urban use and a standard extra-urban use with energy recovery at the rear axle in braking phases. The

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Murgatroyd, J. "Impact energy absorption of playground surfaces." Thesis, Queensland University of Technology, 1998.

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