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Dissertations / Theses on the topic 'Numerial observers'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Chen, Yujia, Yang Lou, Matthew A. Kupinski, and Mark A. Anastasio. "Task-based data-acquisition optimization for sparse image reconstruction systems." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/625209.

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Conventional wisdom dictates that imaging hardware should be optimized by use of an ideal observer (TO) that exploits full statistical knowledge of the class of objects to be imaged, without consideration of the reconstruction method to be employed. However, accurate and tractable models of the complete object statistics are often difficult to determine in practice. Moreover, in imaging systems that employ compressive sensing concepts, imaging hardware and (sparse) image reconstruction are innately coupled technologies. We have previously proposed a sparsity-driven ideal observer (SDIO) that c

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2

Costa, da Silva Alex. "An analysis of the water properties in the western tropical Atlantic using observed data and numerical model results." Universidade Federal de Pernambuco, 2006. https://repositorio.ufpe.br/handle/123456789/8558.

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Made available in DSpace on 2014-06-12T23:01:11Z (GMT). No. of bitstreams: 2 arquivo8136_1.pdf: 7558268 bytes, checksum: 9572385ac570b1234237af69b419eb68 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2006<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Este trabalho apresenta uma análise de dados hidrográficos coletados em quatro campanhas oceanográficas do programa REVIZEE/SCORE-N. Estas campanhas foram realizadas durante os períodos de Março-Maio de 1995, Outubro-Novembro de 1997, Maio-Junho de 1999, e Julho-Agosto

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3

Götz, Felix Johannes [Verfasser], Fritz [Gutachter] Strack, Andreas [Gutachter] Eder, and Martin [Gutachter] Fischer. "Social Cueing of Numerical Magnitude : Observed Head Orientation Influences Number Processing / Felix Johannes Götz ; Gutachter: Fritz Strack, Andreas Eder, Martin Fischer." Würzburg : Universität Würzburg, 2019. http://d-nb.info/1194836267/34.

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4

Götz, Felix [Verfasser], Fritz [Gutachter] Strack, Andreas [Gutachter] Eder, and Martin [Gutachter] Fischer. "Social Cueing of Numerical Magnitude : Observed Head Orientation Influences Number Processing / Felix Johannes Götz ; Gutachter: Fritz Strack, Andreas Eder, Martin Fischer." Würzburg : Universität Würzburg, 2019. http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-187161.

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5

Barhli, Selim Matthias. "Advanced quantitative analysis of crack fields, observed by 2D and 3D image correlation, volume correlation and diffraction mapping." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:d6240241-8a1e-4a8e-aff0-4a2ef14b0da7.

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This thesis is concerned with the evaluation, in-situ, of the elastic strain energy release rate of cracks. This can define the criteria for crack propagation, and it is usually necessary to obtain this via calculation from the geometry and applied load. A new method is proposed, based on the conjoint use of digital image correlation to measure full-field displacements and finite element to extract the strain energy release rate of surface cracks. It has been extended to 3-D datasets with the use of digital volume correlation and tomographic imaging. A finite element model with imported full-f

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6

Sorman, Ali Arda. "Use Of Satellite Observed Seasonal Snow Cover In Hydrological Modeling And Snowmelt Runoff Prediction In Upper Euphrates Basin, Turkey." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606248/index.pdf.

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Snowmelt runoff in the mountainous eastern part of Turkey is of great importance as it constitutes 60-70% in volume of the total yearly runoff during spring and early summer months. Therefore, forecasting the amount and timing of snowmelt runoff especially in the Euphrates Basin, where large dams are located, is an important task in order to use the water resources of the country in an optimum manner. The HBV model, being one of the well-known conceptual hydrological models used more than 45 countries over the world, is applied for the first time in Turkey to a small basin of 242 km2 on the h

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Guio, Patrick. "Etude de paramètres ionosphériques à l'aide des raies de plasma électroniques observées à Eiscat." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10253.

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Ce travail présente une étude des raies de plasma observées à l'aide du radar à diffusion incohérente EISCAT. Le travail est centré sur deux points. Tout d'abord, la conception d'une expérience raies de plasma pour le radar EISCAT, avec une résolution spatiale améliorée. Puis, la comparaison de données raies de plasma acquises avec le radar EISCAT avec une théorie améliorée sur l'intensité et le décalage Doppler en fréquence des raies de plasma. Pour améliorer la résolution spatiale, nous avons conçu la première expérience raies de plasma mettant en oeuvre la technique du code alternatif. Cett

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8

Fougere, N., K. Altwegg, J. J. Berthelier, et al. "Three-dimensional direct simulation Monte-Carlo modeling of the coma of comet 67P/Churyumov-Gerasimenko observed by the VIRTIS and ROSINA instruments on board Rosetta." EDP SCIENCES S A, 2016. http://hdl.handle.net/10150/614711.

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Context. Since its rendezvous with comet 67P/Churyumov-Gerasimenko (67P), the Rosetta spacecraft has provided invaluable information contributing to our understanding of the cometary environment. On board, the VIRTIS and ROSINA instruments can both measure gas parameters in the rarefied cometary atmosphere, the so-called coma, and provide complementary results with remote sensing and in situ measurement techniques, respectively. The data from both ROSINA and VIRTIS instruments suggest that the source regions of H2O and CO2 are not uniformly distributed over the surface of the nucleus even

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9

Drigeard, Elise. "Microphysique glacée des systèmes convectifs observés dans le cadre de Megha-Tropiques en Afrique de l'Ouest : comparaison des mesures aéroportées avec des radars sol et un modèle numérique." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22531/document.

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La météorologie tropicale est un élément majeur pour le fonctionnement de l’atmosphère et pour le climat terrestre. Le satellite Megha-Tropiques regroupe des instruments de télédétection utilisant des algorithmes de restitution complexes. Cette thèse participe à la mise au point de stratégies de validation de ces algorithmes par l’acquisition d’une meilleure connaissance de la phase glacée des systèmes convectifs de méso-échelle (MCS) tropicaux, en s’appuyant sur la campagne de mesures réalisée à Niamey au Niger à l’été 2010. De nombreux MCS à fort contenu en glace (IWC, Ice Water Content) ont

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10

Ghattassi, Mohamed. "Modélisation, observation et commande d’une classe d’équations aux dérivées partielles : application aux matériaux semi-transparents." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0123/document.

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Le travail présenté dans ce mémoire nous a permis d’étudier d’un point de vue théorique et numérique le transfert de chaleur couplé par rayonnement et conduction à travers un milieu semi-transparent, gris et non diffusant dans une géométrie multidimensionnelle 2D. Ces deux modes de transfert de chaleur sont décrits par un couplage non linéaire de l’équation de la chaleur non linéaire (CT) et de l’équation du transfert radiatif (ETR). Nous avons présenté des résultats d’existence, d’unicité locale de la solution pour le système couplé avec des conditions aux limites de type Dirichlet homogènes

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11

Monge, Thierry. "Modélisation et commande multivariable non linéaire robuste des réacteurs chimiques discontinus - application à un procédé industriel." Rouen, 1996. http://www.theses.fr/1996ROUES069.

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Le présent travail concerne, dans une première partie, la modélisation d'un réacteur chimique semi-continu industriel, celle-ci étant ensuite appliquée à la commande multivariable non linéaire. Les bilans instantanés de matière et d'énergie ont d'abord été établis. Une méthodologie a été mise au point pour décrire le système réactionnel correspondant, ceci à l'aide d'une approche hybride molécules/groupements fonctionnels. L'étude de stabilité menée sur le procédé en a montré le caractère instable. A l'aide d'un certain nombre d'expériences, les paramètres cinétiques des réactions principales

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12

Flila, Saïda. "Identification optimale et commande prédictive : applications en génie des procédés." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00458661.

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L'objectif principal de ce travail a été d'apporter une nouvelle contribution quant à l'approche de contrôle optimal pendant la phase d'identification. Il s'agissait de trouver la commande à appliquer pendant l'expérience qui permet d'optimiser un critère qui est fonction des sensibilités des sorties par rapport aux paramètres du modèle à identifier. Cette approche couplant contrôleur prédictif sous contraintes et estimateur a résolu en ligne le problème d'identification à chaque instant en utilisant l'observateur. En ce sens, c'est une approche permettant d'automatiser et d'optimiser le desig

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13

Zhang, Kun. "Contrôle de l'évolution d'un procédé de cristallisation en batch gouverné par des équations aux dérivées partielles." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00965757.

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L'objectif principal de ce travail de recherche est de contrôler l'évolution de la distribution des tailles de cristaux (DTC) dans un procédé de cristallisation en batch. Nous avons été amenés à chercher une résolution numérique du bilan de population et à proposer un algorithme rapide et précis. La méthode numérique a été étendue au cas de la taille des cristaux multidimensionnels en utilisant un maillage mouvant. Nous avons étudié le problème de la commandabilité du système à partir de son modèle discrétisé et puis à partir du modèle continu. Nous avons conçu une loi de commande en boucle fe

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14

He, Yiyang. "A Physically Based Pipeline for Real-Time Simulation and Rendering of Realistic Fire and Smoke." Thesis, Stockholms universitet, Numerisk analys och datalogi (NADA), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-160401.

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With the rapidly growing computational power of modern computers, physically based rendering has found its way into real world applications. Real-time simulations and renderings of fire and smoke had become one major research interest in modern video game industry, and will continue being one important research direction in computer graphics. To visually recreate realistic dynamic fire and smoke is a complicated problem. Furthermore, to solve the problem requires knowledge from various areas, ranged from computer graphics and image processing to computational physics and chemistry. Even though

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15

Pereira, Nicholas F. "Evaluation of image quality using human and numerical observers." 2008. https://scholarworks.umass.edu/dissertations/AAI3336949.

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This work reports an investigation in which localization-receiver-operating-characteristics (LROC) studies employing hybrid images were used. Hybrid images are normal Ga-67 scans modified by the addition of Monte Carlo simulated lesions. After determining a target image contrast using human observers, we conduct pilot LROC studies to determine the optimal parameters for the reconstruction methods. Then we perform a human observer LROC comparison study using the optimal parameters obtained in the pilot studies to determine the relative impact on detection accuracy of the various corrections int

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16

Hsu, Ray T., and 許敦睿. "Numerical Modeling Study of Observed Tseng-wen River Plume." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/55425356900358280016.

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碩士<br>國立中山大學<br>海洋地質及化學研究所<br>87<br>and government officials are concerned. The aim of this study is to understand the hydrodynamics of the Tseng-wen river plume during the flood season in June. First, we deployed an instrumented tripod at Tseng-wen river mouth to observe wave, tide, currents, temperature, salinity, and turbidity for about one week. And cross-shore and longshore transects were surveyed by measuring the vertical salinity, temperature, and suspended sediments concentration (SSC). Besides, numerical modeling study was also involved. Princeton Ocean Model (POM) was applied to

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17

Götz, Felix Johannes. "Social Cueing of Numerical Magnitude : Observed Head Orientation Influences Number Processing." Doctoral thesis, 2019. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-187161.

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In many parts of the modern world, numbers are used as tools to describe spatial relationships, be it heights, latitudes, or distances. However, this connection goes deeper as a myriad of studies showed that number representations are rooted in space (vertical, horizontal, and/or radial). For instance, numbers were shown to affect spatial perception and, conversely, perceptions or movements in space were shown to affect number estimations. This bidirectional link has already found didactic application in the classroom when children are taught the meaning of numbers. However, our knowledge abou

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18

Lorsakul, Auranuch. "Objective Assessment of Image Quality: Extension of Numerical Observer Models to Multidimensional Medical Imaging Studies." Thesis, 2015. https://doi.org/10.7916/D8Z60NB4.

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Encompassing with fields on engineering and medical image quality, this dissertation proposes a novel framework for diagnostic performance evaluation based on objective image-quality assessment, an important step in the development of new imaging devices, acquisitions, or image-processing techniques being used for clinicians and researchers. The objective of this dissertation is to develop computational modeling tools that allow comprehensive evaluation of task-based assessment including clinical interpretation of images regardless of image dimensionality. Because of advances in the de

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19

Chen, Ching-I., and 陳靜宜. "Observe Performance and Numerical Analysis of Freezing Method on Tunnel Mirror Face." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/eh4qs8.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>95<br>The main purpose of this study is to investigate the behavior of freezing soil and find out an appropriate input parameters for numerical analysis of freezing method in tunneling. Two programs, TEMP/W and FLAC3D, are used to analyze the in-situ freezing experiment in NYUST. It is found that TEMP/W is more appropriate for the simulation of freezing method in tunneling. Then, this research uses TEMP/W program to analyze actual freezing project of tunneling engineering, “Dao-Cha” site of mass rapid transit system in Taipei. The tunnel mirror face of “Dao-Cha” s

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20

Edwalds, Eric. "A numerical study of sulfur and nitrogen scavenging in a mesoscale rainband observed in the GALE experiment." Thesis, 1987. http://hdl.handle.net/1957/29368.

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