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Dissertations / Theses on the topic 'Parameterizations'

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Published: 4 June 2021
Last updated: 29 January 2023

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1

Brück, Heiner Matthias. "Evaluation of statistical cloud parameterizations." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-212714.

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This work is motivated by the question: how much complexity is appropriate for a cloud parameterization used in general circulation models (GCM). To approach this question, cloud parameterizations across the complexity range are explored using general circulation models and theoretical Monte-Carlo simulations. Their results are compared with high-resolution satellite observations and simulations that resolve the GCM subgrid-scale variability explicitly. A process-orientated evaluation is facilitated by GCM forecast simulations which reproduce the synoptic state. For this purpose novel methods
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2

Zagoruyko, Sergey. "Weight parameterizations in deep neural networks." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1129/document.

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Les réseaux de neurones multicouches ont été proposés pour la première fois il y a plus de trois décennies, et diverses architectures et paramétrages ont été explorés depuis. Récemment, les unités de traitement graphique ont permis une formation très efficace sur les réseaux neuronaux et ont permis de former des réseaux beaucoup plus grands sur des ensembles de données plus importants, ce qui a considérablement amélioré le rendement dans diverses tâches d'apprentissage supervisé. Cependant, la généralisation est encore loin du niveau humain, et il est difficile de comprendre sur quoi sont basé
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3

Moon, Todd K., and Krishna Kishor Noru. "WAVEFORM SIGNAL SHAPING USING WAVELET PARAMETERIZATIONS." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607582.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>We explore the idea of matching a scaling function - the basic building block of a wavelet function - to a desired spectrum. This would allow the scaling function to be used as the signal pulse for a digital communication system that is matched to the channel, avoiding problems such as energy loss or noise amplification due to spectral nulls. An unconstrained parameterization of the scaling function coefficients represents the scaling functions. This parameterizat
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4

Hales, Jonathan Reid. "Divisors of Modular Parameterizations of Elliptic Curves." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8472.

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The modularity theorem implies that for every elliptic curve E /Q there exist rational maps from the modular curve X_0(N) to E, where N is the conductor of E. These maps may be expressed in terms of pairs of modular functions X(z) and Y(z) that satisfy the Weierstrass equation for E as well as a certain differential equation. Using these two relations, a recursive algorithm can be constructed to calculate the q - expansions of these parameterizations at any cusp. These functions are algebraic over Q(j(z)) and satisfy modular polynomials where each of the coefficient functions are rational func
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5

Katz, Jeremy. "Evaluation of Surface Layer Parameterizations Using In-Situ Observations." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2604.

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Appropriate calculation of surface turbulent fluxes between the atmosphere and the underlying surface is one of the major challenges in geosciences. In practice, the surface turbulent fluxes are estimated from the mean surface meteorological variables based on the bulk transfer model combined with Monnin-Obukhov Similarity (MOS) theory. Few studies have been done to examine the extent that to which this flux parameterization framework can be applied to different weather and surface conditions. A novel validation method is developed in this thesis research, which is applied to evaluate the surf
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6

Kim, Youngseob. "Air quality modeling : evaluation of chemical and meteorological parameterizations." Phd thesis, Université Paris-Est, 2011. http://pastel.archives-ouvertes.fr/pastel-00667777.

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The influence of chemical mechanisms and meteorological parameterizations on pollutant concentrations calculated with an air quality model is studied. The influence of the differences between two gas-phase chemical mechanisms on the formation of ozone and aerosols in Europe is low on average. For ozone, the large local differences are mainly due to the uncertainty associated with the kinetics of nitrogen monoxide (NO) oxidation reactions on the one hand and the representation of different pathways for the oxidation of aromatic compounds on the other hand. The aerosol concentrations are mainly
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7

Quaas, Johannes, and Philip Stier. "Satellite observations of convection and their implications for parameterizations." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-203263.

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Parameterization development and evaluation ideally takes a two-step approach (Lohmann et al., 2007). Insight into new processes, and initial parameterization formulation should be guided by theory, process-level observations (laboratory experiments or field studies) or, if these are unavailable, by high-resolution modelling. However, once implemented into large-scale atmospheric models, a thorough testing and evaluation is required in order to assure that the parameterization works satisfactorily for all weather situations and at the scales the model is applied to. Satellite observations are
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8

Griffin, Joshua Thomas. "Characterization of errors in various moisture roughness length parameterizations." Tallahassee, Florida : Florida State University, 2009. http://etd.lib.fsu.edu/theses/available/etd-11092009-112425/.

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Thesis (M.A.)--Florida State University, 2009.<br>Advisor: Mark A. Bourassa, Florida State University, College of Arts and Sciences, Dept. of Meteorology. Title and description from dissertation home page (viewed on Apr. 8, 2010). Document formatted into pages; contains viii, 30 pages. Includes bibliographical references.
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9

Wilkinson, Jonathan Mark. "Evaluating numerical model cloud parameterizations using radar and lidar simulation." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440441.

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10

Solovev, Mikhail A. "Assessment of mesoscale eddy parameterizations for coarse resolution ocean models." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/58517.

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Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1999.<br>Includes bibliographical references (p. 248-253).<br>Climate simulation with numerical oceanic models requires a proper parameterization scheme in order to represent the effects of unresolved mesoscale eddies. Even though a munber of schemes have been proposed and some have led to improvements in the simulation of the bulk climatological properties, the success of the parameterizations in rep
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11

Martinazzo, Michele. "Cloud optical properties parameterizations for infrared high spectral resolution fast codes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21747/.

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Lo scopo principale di questo lavoro di tesi è quello di produrre un set di parametrizzazioni analitiche per le proprietà ottiche delle nubi e degli aerosoli, utili per essere implementate in un codice veloce di trasferimento radiativo. Il codice veloce da noi preso in considerazione è sigma-IASI-as. Allo stato attuale, questo modello incorpora delle routines di Mie, le quali vengono sfruttate per il calcolo dello spessore ottico in presenza di nubi o aerosoli. Inoltre il codice sfrutta l'approssimazione di Chou allo scopo di tener conto dello scattering della radiazione infrarossa da parte d
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12

Jerg, Matthias. "Solar radiative transfer parameterizations for three-dimensional effects in cloudy atmospheres." Diss., lmu, 2006. http://nbn-resolving.de/urn:nbn:de:bvb:19-62898.

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13

Zidikheri, Meelis Juma, and m. zidikheri@bom gov au. "Dynamical Subgrid-scale Parameterizations for Quasigeostrophic Flows using Direct Numerical Simulations." The Australian National University. Research School of Physical Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20090108.112027.

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In this thesis, parameterizations of non-linear interactions in quasigeostrophic (QG) flows for severely truncated models (STM) and Large Eddy Simulations (LES) are studied. Firstly, using Direct Numerical Simulations (DNS), atmospheric barotropic flows over topography are examined, and it is established that such flows exhibit multiple equilibrium states for a wide range of parameters. A STM is then constructed, consisting of the large scale zonal flow and a topographic mode. It is shown that, qualitatively, this system behaves similarly to the DNS as far as the interaction between the zonal
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14

Pérez, Pérez Edgar. "Heat transport by baroclinic eddies : evaluating eddy parameterizations for numerical models." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442945.

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15

Antritter, Felix [Verfasser]. "Tracking Controller Design for Nonlinear Dynamics using Differential Parameterizations / Felix Antritter." Aachen : Shaker, 2007. http://d-nb.info/1166511219/34.

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16

Komacek, Thaddeus D., and Dorian S. Abbot. "EFFECT OF SURFACE-MANTLE WATER EXCHANGE PARAMETERIZATIONS ON EXOPLANET OCEAN DEPTHS." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622455.

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Terrestrial exoplanets in the canonical habitable zone may have a variety of initial water fractions due to random volatile delivery by planetesimals. If the total planetary water complement is high, the entire surface may be covered in water, forming a "waterworld." On a planet with active tectonics, competing mechanisms act to regulate the abundance of water on the surface by determining the partitioning of water between interior and surface. Here we explore how the incorporation of different mechanisms for the degassing and regassing of water changes the volatile evolution of a planet. For
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17

Whisenhant, Michelle K. "Turbulence parameterizations for convective boundary layers in high-resolution mesoscale models." Diss., Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FWhisenhant%5FPhD.pdf.

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18

Zidikheri, Meelis Juma. "Dynamical subgrid-scale parameterizations for quasigeostrophic flows using direct numerical simulations /." View thesis entry in Australian Digital Theses, 2007. http://thesis.anu.edu.au/public/adt-ANU20090108.112027/index.html.

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19

Atariah, Dror [Verfasser]. "Parameterizations in the Configuration Space and Approximations of Related Surfaces / Dror Atariah." Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1051812410/34.

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20

Kwok, Wilfred. "Automating Radiotherapy: Parameterizations of Sensor Time Delay Compensators and the Separation Principle." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/954.

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Motivated by recent research to automate radiotherapy, this thesis looks into feedback control problems where the feedback sensor imposes considerable time delay. The use of an asymptotic estimator is considered as a method to compensate for the time delay. Properties and parameterizations of asymptotic estimators are analyzed. It is shown that if such a delay compensation scheme is adopted, a separation principle holds, which allows for independent design of the feedback controller and the time delay compensator. The radiotherapy problem is used as a case study to show how asymptotic
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21

Schemann, Vera, Bjorn Stevens, Verena Grützun, and Johannes Quaas. "Scale dependency of total water variance and its implication for cloud parameterizations." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177479.

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The scale dependency of variance of total water mixing ratio is explored by analyzing data from a general circulation model (GCM), a numerical weather prediction model (NWP), and large-eddy simulations (LESs). For clarification, direct numerical simulation (DNS) data are additionally included, but the focus is placed on defining a general scaling behavior for scales ranging from global down to cloud resolving. For this, appropriate power-law exponents are determined by calculating and approximating the power density spectrum. The large-scale models (GCM and NWP) show a consistent scaling with
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22

Larson, Brady M. "Exploring the Common Design Space of Dissimilar Assembly Parameterizations for Interdisciplinary Design." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2368.pdf.

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23

Pieroth, Martin [Verfasser], Ulrich [Gutachter] Achatz, and Andrey [Gutachter] Gritsun. "On the climate dependence of subgrid-scale parameterizations / Martin Pieroth ; Gutachter: Ulrich Achatz, Andrey Gritsun." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2019. http://d-nb.info/1197127992/34.

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24

Pollmann, Friederike [Verfasser], and Carsten [Akademischer Betreuer] Eden. "Oceanic internal gravity waves and turbulent mixing : observations and parameterizations / Friederike Pollmann ; Betreuer: Carsten Eden." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2018. http://d-nb.info/1151322423/34.

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25

Nam, Christine C. W., and Johannes Quaas. "Geographically versus dynamically defined boundary layer cloud regimes and their use to evaluate general circulation model cloud parameterizations: Geographically versus dynamically defined boundary layer cloudregimes and their use to evaluate general circulation model cloud parameterizations." American Geophysical Union (AGU), 2013. https://ul.qucosa.de/id/qucosa%3A13460.

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Regimes of tropical low-level clouds are commonly identified according to large-scale subsidence and lower tropospheric stability (LTS). This definition alone is insufficient for the distinction between regimes and limits the comparison of low-level clouds from CloudSat radar observations and the ECHAM5 GCM run with the COSP radar simulator. Comparisons of CloudSat radar cloud altitude-reflectivity histograms for stratocumulus and shallow cumulus regimes, as defined above, show nearly identical reflectivity profiles, because the distinction between the two regimes is dependent upon atmospheric
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26

Iotti, Marcello. "Urban boundary layer modeling with WRF: assessment of different urban parameterizations over the city of Bologna." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Urbanization affects all the components of the Earth system, clearly including the atmosphere. It is therefore important the understanding of cities-related processes and their representation in modeling terms. Many different spatial scales pertain urban modeling: processes linked to a single building or to an urban district are well represented with microscale methods, but the city as a whole has influences traceable at the mesoscale, a domain traditionally linked to numerical weather prediction (NWP) models. It is evident the discontinuity of these approaches and the advantage that one woul
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27

Martin, Michiko J. "An investigation of momentum exchange parameterizations and atmospheric forcing for the Coastal Mixing and Optics Program." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/55324.

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Thesis (S.M.)--Joint Program in Applied Ocean Physics and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 1998.<br>Includes bibliographic references (p. 77-83).<br>This thesis presents an investigation of the influence of surface waves on momentum exchange. A quantitative comparison of direct covariance friction velocity measurements to bulk aerodynamic and inertial dissipation estimates indicates that both indirect methods systematically underestimate the momentum flux into developing seas. To account for wave-indu
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28

Kawai, Hideaki. "Study on Marine Boundary Layer Clouds and Their Environment for Cloud Parameterizations in Global Climate Models." Kyoto University, 2017. http://hdl.handle.net/2433/226008.

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29

Brück, Heiner Matthias [Verfasser], Johannes [Akademischer Betreuer] Quaas, Johannes [Gutachter] Quaas, and A. Pier [Gutachter] Siebesma. "Evaluation of statistical cloud parameterizations / Heiner Matthias Brück ; Gutachter: Johannes Quaas, A. Pier Siebesma ; Betreuer: Johannes Quaas." Leipzig : Universitätsbibliothek Leipzig, 2016. http://d-nb.info/1240629699/34.

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30

Menon, Surabo, Jean-Louis Brenguier, Olivier Boucher, Paul Davison, Genio Anthony D. Del, Johann Feichter, Steven Ghan, et al. "Evaluating aerosol/cloud/radiation process parameterizations with single-column models and Second Aerosol Characterization Experiment (ACE-2) cloudy column observations: Evaluating aerosol/cloud/radiation process parameterizations withsingle-column models and Second Aerosol Characterization Experiment (ACE-2) cloudy column observations." Wiley, 2003. https://ul.qucosa.de/id/qucosa%3A13455.

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The Second Aerosol Characterization Experiment (ACE-2) data set along with ECMWF reanalysis meteorological fields provided the basis for the single column model (SCM) simulations, performed as part of the PACE (Parameterization of the Aerosol Indirect Climatic Effect) project. Six different SCMs were used to simulate ACE-2 case studies of clean and polluted cloudy boundary layers, with the objective being to identify limitations of the aerosol/cloud/radiation interaction schemes within the range of uncertainty in in situ, reanalysis and satellite retrieved data. The exercise proceeds in three
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31

Nam, Christine C. W., and Johannes Quaas. "Geographically versus dynamically defined boundary layer cloud regimes and their use to evaluate general circulation model cloud parameterizations." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177436.

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Regimes of tropical low-level clouds are commonly identified according to large-scale subsidence and lower tropospheric stability (LTS). This definition alone is insufficient for the distinction between regimes and limits the comparison of low-level clouds from CloudSat radar observations and the ECHAM5 GCM run with the COSP radar simulator. Comparisons of CloudSat radar cloud altitude-reflectivity histograms for stratocumulus and shallow cumulus regimes, as defined above, show nearly identical reflectivity profiles, because the distinction between the two regimes is dependent upon atmospheric
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32

Nam, Christine C. W., Johannes Quaas, Roel Neggers, Drian Colombe Siegenthaler-Le, and Francesco Isotta. "Evaluation of boundary layer cloud parameterizations in the ECHAM5 general circulation model using CALIPSO and CloudSat satellite data." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177343.

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Three different boundary layer cloud models are incorporated into the ECHAM5 general circulation model (GCM) and compared to CloudSat and CALIPSO satellite observations. The first boundary layer model builds upon the standard Tiedtke (1989) parameterization for shallow convection with an adapted convective trigger; the second is a bulk parameterization of the effects of transient shallow cumulus clouds; and lastly the Dual Mass Flux (DMF) scheme adjusted to better represent shallow convection. The three schemes improved (Sub)Tropical oceanic low-level cloud cover, however, the fraction of low-
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33

Börker, Janine [Verfasser], and Jens [Akademischer Betreuer] Hartmann. "Quantifications of global chemical weathering fluxes applying new lithological maps and new parameterizations / Janine Börker ; Betreuer: Jens Hartmann." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1192913116/34.

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34

Nam, Christine C. W., Johannes Quaas, Roel Neggers, Drian Colombe Siegenthaler-Le, and Francesco Isotta. "Evaluation of boundary layer cloud parameterizations in the ECHAM5 general circulation model using CALIPSO and CloudSat satellite data." American Geophysical Union (AGU), 2014. https://ul.qucosa.de/id/qucosa%3A13458.

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Three different boundary layer cloud models are incorporated into the ECHAM5 general circulation model (GCM) and compared to CloudSat and CALIPSO satellite observations. The first boundary layer model builds upon the standard Tiedtke (1989) parameterization for shallow convection with an adapted convective trigger; the second is a bulk parameterization of the effects of transient shallow cumulus clouds; and lastly the Dual Mass Flux (DMF) scheme adjusted to better represent shallow convection. The three schemes improved (Sub)Tropical oceanic low-level cloud cover, however, the fraction of low-
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35

Menon, Surabo, Jean-Louis Brenguier, Olivier Boucher, Paul Davison, Genio Anthony D. Del, Johann Feichter, Steven Ghan, et al. "Evaluating aerosol/cloud/radiation process parameterizations with single-column models and Second Aerosol Characterization Experiment (ACE-2) cloudy column observations." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177303.

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The Second Aerosol Characterization Experiment (ACE-2) data set along with ECMWF reanalysis meteorological fields provided the basis for the single column model (SCM) simulations, performed as part of the PACE (Parameterization of the Aerosol Indirect Climatic Effect) project. Six different SCMs were used to simulate ACE-2 case studies of clean and polluted cloudy boundary layers, with the objective being to identify limitations of the aerosol/cloud/radiation interaction schemes within the range of uncertainty in in situ, reanalysis and satellite retrieved data. The exercise proceeds in three
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36

Friedrich, Stefan Roland [Verfasser], Martin [Akademischer Betreuer] Buss, Jürgen [Gutachter] Adamy, and Martin [Gutachter] Buss. "Learning and Feedback in Robotics with Stabilizing Controller Parameterizations / Stefan Roland Friedrich ; Gutachter: Jürgen Adamy, Martin Buss ; Betreuer: Martin Buss." München : Universitätsbibliothek der TU München, 2021. http://d-nb.info/1237413222/34.

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37

Juricke, Stephan [Verfasser], Thomas [Akademischer Betreuer] Jung, and Peter [Akademischer Betreuer] Lemke. "Representing uncertainty in global climate models using stochastic sea ice parameterizations / Stephan Juricke. Gutachter: Thomas Jung ; Peter Lemke. Betreuer: Thomas Jung." Bremen : Staats- und Universitätsbibliothek Bremen, 2014. http://d-nb.info/1072225980/34.

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38

Schemann, Vera, Bjorn Stevens, Verena Grützun, and Johannes Quaas. "Scale dependency of total water variance and its implication for cloud parameterizations: Scale dependency of total water variance and its implication for cloudparameterizations." American Meteorological Society, 2013. https://ul.qucosa.de/id/qucosa%3A13462.

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The scale dependency of variance of total water mixing ratio is explored by analyzing data from a general circulation model (GCM), a numerical weather prediction model (NWP), and large-eddy simulations (LESs). For clarification, direct numerical simulation (DNS) data are additionally included, but the focus is placed on defining a general scaling behavior for scales ranging from global down to cloud resolving. For this, appropriate power-law exponents are determined by calculating and approximating the power density spectrum. The large-scale models (GCM and NWP) show a consistent scaling with
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39

Quaas, Johannes. "Evaluating the “critical relative humidity” as a measure of subgrid-scale variability of humidity in general circulation model cloud cover parameterizations using satellite data." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177265.

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A simple way to diagnose fractional cloud cover in general circulation models is to relate it to the simulated relative humidity, and allowing for fractional cloud cover above a “critical relative humidity” of less than 100%. In the formulation chosen here, this is equivalent to assuming a uniform “top-hat” distribution of subgrid-scale total water content with a variance related to saturation. Critical relative humidity has frequently been treated as a “tunable” constant, yet it is an observable. Here, this parameter, and its spatial distribution, is examined from Atmospheric Infrared Sounder
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40

Pelletier, Charles. "Etude mathématique du problème de couplage océan-atmosphère incluant les échelles turbulentes." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAM014/document.

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Cette thèse s'intéresse à la modélisation numérique du couplage entre l'océan et l'atmosphère. Bien que présentant un certain nombre de caractéristiques communes, ces deux milieux physiques sont suffisamment dissemblables pour être numériquement simulés par des modèles distincts, incluant chacun des spécificités propres. Par conséquent, leurs interactions sont prises en compte via des algorithmes de couplage multiphysique.La mise en place de tels algorithmes nécessite une bonne compréhension des modélisations des milieux océanique et atmosphérique, en particulier au voisinage de leur interface
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41

Schomburg, Annika [Verfasser]. "Improving the simulation of small-scale variability in radiation and land-surface parameterizations in a mesoscale numerical weather prediction model / Annika Schomburg. Mathematisch-Naturwissenschaftliche Fakultät." Bonn : Universitäts- und Landesbibliothek Bonn, 2011. http://d-nb.info/1016198094/34.

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42

Sič, Bojan. "Amélioration de la représentation des aérosols dans un modèle de chimie-transport : modélisation et assimilation de données." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2667/.

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L'objectif général de cette thèse est d'améliorer la représentation des aérosols dans le modèle MOCAGE. Pour se faire, nous avons modifié directement la représentation des aérosols en réexaminant et améliorant les différents processus déjà présents via la prise en compte de schémas et de paramétrisations plus détaillés et implémenté l'assimilation de données des aérosols dans le modèle. Les processus ayant subi les améliorations les plus importantes sont les émissions des aérosols du type sel marin, poussière désertique et cendre volcanique, le dépôt humide et la sédimentation. Nous avons éval
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43

Havel, Jiří. "Zobrazení bodů na přímky a jiné parametrizace přímek nejen pro Houghovu transformaci." Doctoral thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-261256.

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Tato práce se zabývá Houghovou transformací (HT). HT je nejčastěji používána pro detekci přímek nebo křivek, ale byla zobecněna i pro detekci libovolných tvarů. Hlavní téma této práce jsou parametrizace přímek, speciálně PTLM - zobrazení bodů na přímky. Tyto parametrizace mají tu vlastnost, že bodům v obrázku odpovídají přímky v parametrickém prostoru. Tato práce poskytuje důkazy některých vlastností PTLM. Za zmínku stojí existence páru PTLM vhodného pro detekci a efekt konvoluce v obrázku na obsah parametrického prostoru. V práci jsou prezentovány dvě implementace HT. Obě využívají k akcelera
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Agar, Christopher D. "Dynamic parameterization of IPSEC." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA401378.

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Thesis (M.S. in Computer Science) Naval Postgraduate School, December 2001.<br>Thesis Advisor (s): Irvine, Cynthia E. "December 2001." Includes bibliographical references (p. 311-313). Also available online.
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Oliveira, Erikson Magno Gomes de. "PARAMETRIZAÇÕES CONVECTIVAS NO MODELO WRF E SUA RELAÇÃO COM A PRECIPITAÇÃO DURANTE CICLOGÊNESES NO SUDESTE DA AMÉRICA DO SUL." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/10274.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The Weather Research and Forecasting (WRF) model is used in the simulation of 26 cases of cyclogenesis in southeastern South America, on the cyclogenetic region near the La Plata River mouth. The simulations comprised 26 cases of cyclogenesis in which rainfall was observed over the region, especially on the state of Rio Grande do Sul. Given the important role of convective parameterization in the production of precipitation into a numerical weather prediction model, this study aims to evaluate the precipitation produced in the simu
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Brunton, Alan P. "Multi-scale Methods for Omnidirectional Stereo with Application to Real-time Virtual Walkthroughs." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23552.

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This thesis addresses a number of problems in computer vision, image processing, and geometry processing, and presents novel solutions to these problems. The overarching theme of the techniques presented here is a multi-scale approach, leveraging mathematical tools to represent images and surfaces at different scales, and methods that can be adapted from one type of domain (eg., the plane) to another (eg., the sphere). The main problem addressed in this thesis is known as stereo reconstruction: reconstructing the geometry of a scene or object from two or more images of that scene. We develop n
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Touzé-Peiffer, Ludovic. "Paramétrisation de la convection atmosphérique dans les modèles numériques de climat - Pratiques et enjeux épistémologiques." Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS539.pdf.

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Historiquement, les modèles de circulation générale ont joué un rôle crucial pour avertir les décideurs et le grand public des changements climatiques à venir. Pourtant, depuis quelques années, des débats agitent la communauté scientifique sur le paradigme dominant sur lequel ont été développés de tels modèles: en particulier, les paramétrisations, censées représentées l'ensemble des processus pertinents pour le climat qui ne sont pas résolus à l'échelle de la grille des modèles, sont parfois remises en cause. L'objectif de notre travail de thèse est de mener une analyse épistémologique des pa
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Valle, G. Raul del. "Model parameterization in refraction seismology." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66057.

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Litke, Nathan Jacob Schröder Peter. "Variational methods in surface parameterization /." Diss., Pasadena, Calif. : California Institute of Technology, 2005. http://resolver.caltech.edu/CaltechETD:etd-05312005-224704.

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Larsson, Oscar. "Empirical parameterization of organic electrochemical transistors." Thesis, Linköping University, Department of Science and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1503.

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<p>In this diploma work, organic electrochemical transistors based on PEDOT:PSS have been studied, focusing on the influence of the geometry and physical dimensions on the transistor characteristics. The geometrical parameters studied are the area ratio between the gate and channel, the channel width and the channel length. Each parameter has been varied in five steps with each step containing three identical transistors. Results concerning the geometrical influence of the linear region resistance, the saturation current (density) and the on/off ratio are presented and discussed. Also, empiric
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