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Rozprawy doktorskie na temat „Optimal matching”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 11 marca 2023

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1

Abrahamson, Jeff Shokoufandeh Ali. "Optimal matching and deterministic sampling /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/2526.

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Moser, Hannes. "Finding optimal solutions for covering and matching problems." Göttingen Cuvillier, 2009. http://d-nb.info/999819399/04.

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Kwanashie, Augustine. "Efficient algorithms for optimal matching problems under preferences." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6706/.

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In this thesis we consider efficient algorithms for matching problems involving preferences, i.e., problems where agents may be required to list other agents that they find acceptable in order of preference. In particular we mainly study the Stable Marriage problem (SM), the Hospitals / Residents problem (HR) and the Student / Project Allocation problem (SPA), and some of their variants. In some of these problems the aim is to find a stable matching which is one that admits no blocking pair. A blocking pair with respect to a matching is a pair of agents that prefer to be matched to each other

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4

Singh, Rohit Ph D. Massachusetts Institute of Technology. "Automatically learning optimal formula simplifiers and database entity matching rules." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113938.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 153-161).<br>Traditionally, machine learning (ML) is used to find a function from data to optimize a numerical score. On the other hand, synthesis is traditionally used to find a function (or a program) that can be derived fr

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5

Chen, Hanyi. "Probabilistic matching systems : stability, fluid and diffusion approximations and optimal control." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10570.

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In this work we introduce a novel queueing model with two classes of users in which, instead of accessing a resource, users wait in the system to match with a candidate from the other class. The users are selective and the matchings occur probabilistically. This new model is useful for analysing the traffic in web portals that match people who provide a service with people who demand the same service, e.g. employment portals, matrimonial and dating sites and rental portals. We first provide a Markov chain model for these systems and derive the probability distribution of the number of matches

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Kumar, Deepak. "Optimal finite alphabet sources over partial response channels." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1044.

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We present a serially concatenated coding scheme for partial response channels. The encoder consists of an outer irregular LDPC code and an inner matched spectrum trellis code. These codes are shown to offer considerable improvement over the i.i.d. capacity (> 1 dB) of the channel for low rates (approximately 0.1 bits per channel use). We also present a qualitative argument on the optimality of these codes for low rates. We also formulate a performance index for such codes to predict their performance for low rates. The results have been verified via simulations for the (1-D)/sqrt(2) and the (

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7

Burnham, Katherine Lee. "Information fusion for an unmanned underwater vehicle through probabilistic prediction and optimal matching." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127297.

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Thesis: S.M., Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, May, 2020<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 89-92).<br>This thesis presents a method for information fusion for an unmanned underwater vehicle (UUV).We consider a system that fuses contact reports from automated information system (AIS) data and active and passive sonar sensors. A linear assignment problem with learned assignment costs is solved to fuse sonar and AIS data. Since the sensors operate effectively at different depths, the

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8

Akers, Allen. "Determination of the Optimal Number of Strata for Bias Reduction in Propensity Score Matching." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28380/.

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Previous research implementing stratification on the propensity score has generally relied on using five strata, based on prior theoretical groundwork and minimal empirical evidence as to the suitability of quintiles to adequately reduce bias in all cases and across all sample sizes. This study investigates bias reduction across varying number of strata and sample sizes via a large-scale simulation to determine the adequacy of quintiles for bias reduction under all conditions. Sample sizes ranged from 100 to 50,000 and strata from 3 to 20. Both the percentage of bias reduction and the standard

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Salter, James Martin. "Uncertainty quantification for spatial field data using expensive computer models : refocussed Bayesian calibration with optimal projection." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/30114.

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In this thesis, we present novel methodology for emulating and calibrating computer models with high-dimensional output. Computer models for complex physical systems, such as climate, are typically expensive and time-consuming to run. Due to this inability to run computer models efficiently, statistical models ('emulators') are used as fast approximations of the computer model, fitted based on a small number of runs of the expensive model, allowing more of the input parameter space to be explored. Common choices for emulators are regressions and Gaussian processes. The input parameters of the

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Araujo, Bruno César Pino Oliveira de. "Trajetórias ocupacionais de engenheiros jovens no Brasil." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3136/tde-23062016-153336/.

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Esta tese analisa 9.041 trajetórias ocupacionais de jovens engenheiros como empregados formais no Brasil entre 2003-2012, a partir da técnica de Optimal Matching Analysis (OMA). Estas trajetórias foram comparadas às de uma geração anterior de jovens engenheiros, tanto em seu período-base (1995-2002) como entre 2003-2012, a fim de identificar efeitos de idade e período. Os principais resultados são: (i) conforme esperado, trajetórias ocupacionais ligadas à gestão (em áreas correlatas à engenharia ou não) são as que oferecem remuneração mais alta em todos os períodos analisados; (ii) nos anos 20

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Scarponi, Matteo. "Analysis of existing tsunami scenario databases for optimal design and efficient real-time event matching." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13546/.

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Pre-computed tsunami scenario databases constitute a traditional basis to the production of tsunami forecasts in real time, achieved through a combination of properly selected Green’s functions-like objects. The considered case-study database contains water elevation fields and waveform signals produced by an arrangement of evenly-spaced elementary seismic sources, covering fault areas relevant in determining the Portuguese tsunami hazard. This work proposes a novel real-time processing for the tsunami forecast production, aiming at the accuracy given by traditional methods but with less tim

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12

Stra, Federico. "Classical and multi-marginal optimal transport, with applications." Doctoral thesis, Scuola Normale Superiore, 2018. http://hdl.handle.net/11384/85725.

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Kazemi, Alireza. "Optimal parameter updating and appropriate 4D seismic normalization in seismic history matching of the Nelson field." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2474.

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History matching of reservoirs is very important in the oil industry because the simulation model is an important tool that can help with management decisions and planning of future production strategies. Nowadays, time-lapse (4D) seismic data is very useful for better capturing the fluid displacement in the reservoir, especially between wells. It is now common to integrate 4D seismic with production data in order to constrain the simulation model to both types of data. This thesis is based on a technique for automatic production and seismic history matching of reservoirs by. This technique in

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Chowdhury, Israt Jahan. "Knowledge discovery from tree databases using balanced optimal search." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/92263/1/Israt%20Jahan_Chowdhury_Thesis.pdf.

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This research is a step forward in discovering knowledge from databases of complex structure like tree or graph. Several data mining algorithms are developed based on a novel representation called Balanced Optimal Search for extracting implicit, unknown and potentially useful information like patterns, similarities and various relationships from tree data, which are also proved to be advantageous in analysing big data. This thesis focuses on analysing unordered tree data, which is robust to data inconsistency, irregularity and swift information changes, hence, in the era of big data it becomes

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Al, Hajri Abdullah Said Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Logistics technology transfer model." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2008. http://handle.unsw.edu.au/1959.4/41469.

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A consecutive number of studies on the adoption trend of logistics technology since 1988 revealed that logistics organizations are not in the frontier when it comes to adopting new technology and this delayed adoption creates an information gap. In the advent of supply chain management and the strategic position of logistics, the need for accurate and timely information to accompany the logistics executives became more important than ever before. Given the integrative nature of logistics technology, failure to implement the technology successfully could result in writing off major investments

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16

Kriwoluzky, Alexander. "Matching DSGE models to data with applications to fiscal and robust monetary policy." Doctoral thesis, Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät, 2009. http://dx.doi.org/10.18452/16052.

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Diese Doktorarbeit untersucht drei Fragestellungen. Erstens, wie die Wirkung von plötzlichen Änderungen exogener Faktoren auf endogene Variablen empirisch im Allgemeinen zu bestimmen ist. Zweitens, welche Effekte eine Erhöhung der Staatsausgaben im Speziellen hat. Drittens, wie optimale Geldpolitik bestimmt werden kann, wenn der Entscheider keine eindeutigen Modelle für die ökonomischen Rahmenbedingungen hat. Im ersten Kapitel entwickele ich eine Methode, mithilfe derer die Effekte von plötzlichen Änderungen exogener Faktoren auf endogene Variablen geschätzt werden können. Dazu wird die gemein

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Berger, Martin [Verfasser], and Ulrich [Akademischer Betreuer] Brannolte. "Typologiebildung und Erklärung des Aktivitäten-(Verkehrs-)verhaltens – ein Multimethodenansatz unter Verwendung der Optimal Matching Technik / Martin Berger ; Betreuer: Ulrich Brannolte." Weimar : Professur Verkehrsplanung und Verkehrstechnik, 2004. http://d-nb.info/1115727753/34.

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Diop, Serigne Arona, and Serigne Arona Diop. "Comparing inverse probability of treatment weighting methods and optimal nonbipartite matching for estimating the causal effect of a multicategorical treatment." Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/34507.

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Des débalancements des covariables entre les groupes de traitement sont souvent présents dans les études observationnelles et peuvent biaiser les comparaisons entre les traitements. Ce biais peut notamment être corrigé grâce à des méthodes de pondération ou d’appariement. Ces méthodes de correction ont rarement été comparées dans un contexte de traitement à plusieurs catégories (>2). Nous avons mené une étude de simulation pour comparer une méthode d’appariement optimal non-biparti, la pondération par probabilité inverse de traitement ainsi qu’une pondération modifiée analogue à l’appariement

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Feichtner, Thorsten [Verfasser], Bert [Gutachter] Hecht, and Tobias [Gutachter] Brixner. "Optimal Design of Focusing Nanoantennas for Light : Novel Approaches: From Evolution to Mode-Matching / Thorsten Feichtner ; Gutachter: Bert Hecht, Tobias Brixner." Würzburg : Universität Würzburg, 2016. http://d-nb.info/1147681929/34.

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Chari, Kartik Seshadri. "Dynamic Modelling and Optimal Control of Autonomous Heavy-duty Vehicles." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291634.

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Autonomous vehicles have gained much importance over the last decade owing to their promising capabilities like improvement in overall traffic flow, reduction in pollution and elimination of human errors. However, when it comes to long-distance transportation or working in complex isolated environments like mines, various factors such as safety, fuel efficiency, transportation cost, robustness, and accuracy become very critical. This thesis, developed at the Connected and Autonomous Systems department of Scania AB in association with KTH, focuses on addressing the issues related to fuel effici

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Abdulaziz, Noor Amal Saud. "Evaluation of Texas Home Instruction for Parents of Preschool Youngsters Program on Reading and Math Achievement for Grades K to 8." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538753/.

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This study was intended to evaluate the impact of socioeconomically disadvantaged children's participation in the Texas Home Instruction for Parents of Preschool Youngsters (TX HIPPY) Program on their school readiness and academic achievement. The study used a quasi-experimental design and applied full and optimal propensity score matching (PSM) to address the evaluation concern of the impact of the TX HIPPY program on HIPPY participants' academic achievement compared to non-HIPPY participants. This evaluation targeted former HIPPY participants and tracked them in the Dallas ISD database throu

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Santacruz, Muñoz José Luis. "Error-tolerant Graph Matching on Huge Graphs and Learning Strategies on the Edit Costs." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/668356.

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Els grafs són estructures de dades abstractes que s'utilitzen per a modelar problemes reals amb dues entitats bàsiques: nodes i arestes. Cada node o vèrtex representa un punt d'interès rellevant d'un problema, i cada aresta representa la relació entre aquests vèrtexs. Els nodes i les arestes podrien incorporar atributs per augmentar la precisió del problema modelat. Degut a aquesta versatilitat, s'han trobat moltes aplicacions en camps com la visió per computador, biomèdics, anàlisi de xarxes, etc. La Distància d'edició de grafs (GED) s'ha convertit en una eina important en el reconeixement de

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Le, Brigant Alice. "Probability on the spaces of curves and the associated metric spaces via information geometry; radar applications." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0640/document.

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Nous nous intéressons à la comparaison de formes de courbes lisses prenant leurs valeurs dans une variété riemannienne M. Dans ce but, nous introduisons une métrique riemannienne invariante par reparamétrisations sur la variété de dimension infinie des immersions lisses dans M. L’équation géodésique est donnée et les géodésiques entre deux courbes sont construites par tir géodésique. La structure quotient induite par l’action du groupe des reparamétrisations sur l’espace des courbes est étudiée. À l’aide d’une décomposition canonique d’un chemin dans un fibré principal, nous proposons un algor

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24

Nguyen, Van Thanh. "Problèmes de transport partiel optimal et d'appariement avec contrainte." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0052.

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Cette thèse est consacrée à l'analyse mathématique et numérique pour les problèmes de transport partiel optimal et d'appariement avec contrainte (constrained matching problem). Ces deux problèmes présentent de nouvelles quantités inconnues, appelées parties actives. Pour le transport partiel optimal avec des coûts qui sont donnés par la distance finslerienne, nous présentons des formulations équivalentes caractérisant les parties actives, le potentiel de Kantorovich et le flot optimal. En particulier, l'EDP de condition d'optimalité permet de montrer l'unicité des parties actives. Ensuite, nou

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Diallo, Ibrahima. "Some topics in mathematical finance: Asian basket option pricing, Optimal investment strategies." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210165.

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This thesis presents the main results of my research in the field of computational finance and portfolios optimization. We focus on pricing Asian basket options and portfolio problems in the presence of inflation with stochastic interest rates.<p><p>In Chapter 2, we concentrate upon the derivation of bounds for European-style discrete arithmetic Asian basket options in a Black and Scholes framework.We start from methods used for basket options and Asian options. First, we use the general approach for deriving upper and lower bounds for stop-loss premia of sums of non-independent random variabl

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Barban, Nicola. "Essays on sequence analysis for life course trajectories." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3421549.

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The thesis is articulated in three chapters in which I explore methodological aspects of sequence analysis for life course studies and I present some empirical analyses. In the first chapter, I study the reliability of two holistic methods used in life-course methodology. Using simulated data, I compare the goodness of classification of Latent Class Analysis and Sequence Analysis techniques. I first compare the consistency of the classification obtained via the two techniques using an actual dataset on the life course trajectories of young adults. Then, I adopt a simulation approach to measure

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Toubi, Wafa. "Assurance chômage optimale et stabilité de l’emploi." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0309/document.

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La thèse étudie les liens qui existent entre les recommandations issues de la littérature sur l'assurance chômage optimale et la qualité des emplois repris par les chômeurs. Nous nous intéressons en particulier à une dimension de la qualité de l'emploi qu'est la stabilité des emplois dans un contexte où les contrats de courte voire de très courte durée sont en pleine expansion en France. En utilisant les modèles théoriques de recherche d'emploi et d'appariement, nous analysons la manière dont les caractéristiques de l'assurance chômage affectent la stabilité des emplois repris. La particularit

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Barišin, Ivana. "Optical sub-pixel matching and active tectonics." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:17d42603-1946-49d1-8144-edc0ca0ae501.

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In this thesis I use sub-pixel optical matching, Interferometric Synthetic Aperture Radar (InSAR), and Light Detection and Ranging (lidar) spatial geodetic observations to produce reliable 3D displacement fields caused by co-seismic events and reliable earthquake source models with slip distribution on fault planes. I produce horizontal displacement maps for the 2005 Dabbahu segment, Afar using SPOT4 satellite images. By combining InSAR descending data and range offsets with optical sub-pixel I produced a vertical displacement map of the event. I attempted to perform the inversion of the datas

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Kim, Taegeun. "Optical Three-Dimensional Image Matching Using Holographic Information." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28362.

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We present a three-dimensional (3-D) optical image matching technique and location extraction techniques of matched 3-D objects for optical pattern recognition. We first describe the 3-D matching technique based on two-pupil optical heterodyne scanning. A hologram of the 3-D reference object is first created and then represented as one pupil function with the other pupil function being a delta function. The superposition of each beam modulated by the two pupils generates a scanning beam pattern. This beam pattern scans the 3-D target object to be recognized. The output of the scanning system g

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Charbonneau-Lefort, Mathieu. "Optical parametric amplifiers using chirped quasi-phase-matching gratings /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Lakemond, Ruan. "Multiple camera management using wide baseline matching." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/37668/1/Ruan_Lakemond_Thesis.pdf.

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Camera calibration information is required in order for multiple camera networks to deliver more than the sum of many single camera systems. Methods exist for manually calibrating cameras with high accuracy. Manually calibrating networks with many cameras is, however, time consuming, expensive and impractical for networks that undergo frequent change. For this reason, automatic calibration techniques have been vigorously researched in recent years. Fully automatic calibration methods depend on the ability to automatically find point correspondences between overlapping views. In typical camera

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32

Feuillâtre, Hélène. "Détermination automatique de l'incidence optimale pour l'observation des lésions coronaires en imagerie rotationnelle R-X." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S039/document.

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Les travaux de cette thèse s’inscrivent dans le cadre du planning de traitements minimalement invasifs des lésions des artères coronaires. Le cardiologue réalise un examen coronarographique, puis dans la continuité, une angioplastie transluminale. L’angiographie rotationnelle à rayons X permet de visualiser sous différentes incidences 2D la lumière des artères coronaires sur plusieurs cycles cardiaques et aussi d’obtenir une reconstruction 3D+T des arbres coronaires. A partir de cette séquence, notre objectif est de déterminer automatiquement une incidence optimale 2D du segment sténosé compat

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Park, Gwangcheol. "Multiscale deformable template matching for image analysis." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/13737.

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Dornala, Maninder. "Visualization of Clustering Solutions for Large Multi-dimensional Sequential Datasets." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525869411092807.

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Tsa, Woo-Hu. "Mode-matching method in optical corrugated waveguides with large rectangular groove depth." Thesis, University of Glasgow, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297039.

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Galindo, Patricio A. "Image matching for 3D reconstruction using complementary optical and geometric information." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0007/document.

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L’appariement d’images est un sujet central de recherche en vision par ordinateur. La recherche sur cette problématique s’est longuement concentrée sur ses aspects optiques, mais ses aspects géométriques ont reçu beaucoup moins d’attention. Cette thèse promeut l’utilisation de la géométrie pour compléter les informations optique dans les tâches de mise en correspondance d’images. Tout d’abord, nous nous penchons sur les méthodes globales pour lesquelles les occlusions et arêtes vives posent des défis. Dans ces scenarios, le résultat est fortement dépendant de la contribution du terme de régula

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Pitcher, Courtney Richard. "Matching optical coherence tomography fingerprint scans using an iterative closest point pipeline." Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33923.

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Identifying people from their fingerprints is based on well established technology. However, a number of challenges remain, notably overcoming the low feature density of the surface fingerprint and suboptimal feature matching. 2D contact based fingerprint scanners offer low security performance, are easy to spoof, and are unhygienic. Optical Coherence Tomography (OCT) is an emerging technology that allows a 3D volumetric scan of the finger surface and its internal microstructures. The junction between the epidermis and dermis - the internal fingerprint - mirrors the external fingerprint. The e

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Rankine, Luke. "Newborn EEG seizure detection using adaptive time-frequency signal processing." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16200/1/Luke_Rankine_Thesis.pdf.

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Dysfunction in the central nervous system of the neonate is often first identified through seizures. The diffculty in detecting clinical seizures, which involves the observation of physical manifestations characteristic to newborn seizure, has placed greater emphasis on the detection of newborn electroencephalographic (EEG) seizure. The high incidence of newborn seizure has resulted in considerable mortality and morbidity rates in the neonate. Accurate and rapid diagnosis of neonatal seizure is essential for proper treatment and therapy. This has impelled researchers to investigate possible me

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Rankine, Luke. "Newborn EEG seizure detection using adaptive time-frequency signal processing." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16200/.

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Dysfunction in the central nervous system of the neonate is often first identified through seizures. The diffculty in detecting clinical seizures, which involves the observation of physical manifestations characteristic to newborn seizure, has placed greater emphasis on the detection of newborn electroencephalographic (EEG) seizure. The high incidence of newborn seizure has resulted in considerable mortality and morbidity rates in the neonate. Accurate and rapid diagnosis of neonatal seizure is essential for proper treatment and therapy. This has impelled researchers to investigate possible me

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Ju, Hui. "A Novel Approach to Robust LiDAR/Optical Imagery Registration." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1370262649.

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Chosson, Elie. "Le Revenu de Solidarité Active (RSA) au prisme de ses catégories formelles : pour une évaluation critique du dispositif." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAE008/document.

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Le Revenu de Solidarité Active (RSA) a suscité un vif intérêt dans la communauté scientifique, mais son évaluation s'est focalisée sur son impact sur les taux de retour à l'emploi et sur la pauvreté laborieuse. Dans ce contexte, la thèse construit une évaluation critique du dispositif: nous montrons son incapacité à prendre en charge la position contradictoire dans laquelle sont placés les bénéficiaires. Ceux-ci sont en effet confrontés à des conditions de valorisation de la force de travail structurellement difficiles, et dans le même temps le dispositif organise, par différents moyens, la ce

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42

Daengngam, Chalongrat. "Second-Order Nonlinear Optical Responses in Tapered Optical Fibers with Self-Assembled Organic Multilayers." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77068.

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Owing to its centrosymmetric structure, the critical optical component of a silica fiber cannot to possess a second-order nonlinear optical susceptibility, Χ(²), preventing a silica fiber from many potential applications. Here, we theoretically and experimentally demonstrate a new technique to generate large and thermodynamically stable second-order nonlinearity into silica optical tapered fibers without breaking the centrosymmetry of the silica glass. The nonlinearity is introduced by surface layers with high polar-ordering fabricated by a novel hybrid covalent/ionic self-assembly multilayer

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Feaver, Ryan K. "Cascaded Orientation-Patterned Gallium Arsenide Optical Parametric Oscillator for Improved Longwave Infrared Conversion Efficiency." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1493206535730182.

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Alibakhshikenari, M., B. S. Virdee, L. Azpilicueta, C. H. See, Raed A. Abd-Alhameed, A. A. Althuwayb, F. Falcone, I. Huyen, T. A. Denidni, and E. Limiti. "Optimum power transfer in RF front end systems using adaptive impedance matching technique." Nature Publishing Group, 2021. http://hdl.handle.net/10454/18508.

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Yes<br>Matching the antenna’s impedance to the RF-front-end of a wireless communications system is challenging as the impedance varies with its surround environment. Autonomously matching the antenna to the RF-front-end is therefore essential to optimize power transfer and thereby maintain the antenna’s radiation efficiency. This paper presents a theoretical technique for automatically tuning an LC impedance matching network that compensates antenna mismatch presented to the RF-front-end. The proposed technique converges to a matching point without the need of complex mathematical modelling of

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Ragain, James Carlton. "Matching the optical properties of direct esthetic dental restorative materials to those of human enamel and dentin." The Ohio State University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/48036279.html.

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Thesis (Ph. D.)--Ohio State University, 1998.<br>Advisor: William M. Johnson, Oral Biology Program. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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Strömqvist, Gustav. "Nonlinear response in engineered optical materials." Doctoral thesis, KTH, Laserfysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92221.

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Material and structure engineering are increasingly employed in active optical media,in this context defined as media capable of providing laser or/and optical parametric gain. For laser materials, the main aim of the engineering is to tailor the absorption and emission cross sections in order to optimise the laser performance. At the same time, the engineering also results in a collateral modification of the material’s nonlinear response. In the first part of this work, the nonlinear index of refraction is characterised for two crystallographic forms of laser-ion doped and undoped double-tung

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Campolmi, Alessia. "Essays on open economic, inflation and labour markets." Doctoral thesis, Universitat Pompeu Fabra, 2008. http://hdl.handle.net/10803/7367.

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En los últimos años se ha desarollado mucho la literatura que utiliza modelos estocásticos de equilibrio económico general en economía abierta. En esta clase de modelos el primer capítulo estudia si el banco central tiene que fijarse en al inflación medida mirando al los precios al consumo (CPI) o a los precios a la producción. Se demonstra como la introducción de competencia monopolística en el mercado del trabajo y rigidez de los salarios nominales justifica el utilizo de la inflación medida sobre CPI. En el segundo capítulo el enfoque es sobre las diferentes volatilidades de la inflación en

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Henriksson, Markus. "Nanosecond tandem optical parametric oscillators for mid-infrared generation." Licentiate thesis, KTH, Physics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4261.

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<p>This thesis discusses a new scheme for generating radiation in the mid infrared spectral region, especially the 3.5-5 µm range. The scheme uses established Nd<sup>3+</sup>-lasers at 1.06 µm and down conversion in nonlinear optical crystals. The down conversion is made by two optical parametric oscillators (OPO) in series. The second OPO is a classical OPO using a zink germanium phosphide (ZGP) crystal. ZGP is the best nonlinear material available for the 4-8 µm spectral range, but it is absorbing below 2 µm. The new development presented in this thesis is the OPO used to convert the 1.06 µm

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Myrén, Niklas. "Components based on optical fibers with internal electrodes." Licentiate thesis, KTH, Physics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1685.

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<p>The topic of this thesis is development ofdevices fortelecom applications based on poled optical fibers. The focusis on two different specific functions, wavelength conversionand optical switching.</p><p>Optical switching is demonstrated in a poled optical fiberat telecom wavelengths (~1.55 mm). The fiber has two holesrunning along the core in which electrodes are inserted. Thefiber device is made electro-optically active with a polingprocess in which a strong electric field is recorded in thefiber at a temperature of 270 o C. The fiber is then put in onearm of a Mach-Zehnder interferometer

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Levenius, Martin. "Optical Parametric Devices in Periodically Poled LiTaO3." Doctoral thesis, KTH, Kvantelektronik och -optik, QEO, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134915.

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Optical parametric frequency conversion based on quasi phase matching (QPM) in nonlinear optical crystals is a powerful technique for generating coherent radiation in wavelength ranges spanning from the mid-infrared (mid-IR) to the blue, displaying low thermal load and high efficiency.This thesis shows how QPM in one- (1D) or two-dimensional (2D) lattices can be employed to engineer novel devices for parametric downconversion in the IR, af-fording freedom in designing both spectral and angular properties of the parametric output. Experimental demonstrations of parametric devices are supported

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