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Brück, Heiner Matthias. "Evaluation of statistical cloud parameterizations". Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-212714.
Pełny tekst źródłaZagoruyko, Sergey. "Weight parameterizations in deep neural networks". Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC1129/document.
Pełny tekst źródłaMultilayer neural networks were first proposed more than three decades ago, and various architectures and parameterizations were explored since. Recently, graphics processing units enabled very efficient neural network training, and allowed training much larger networks on larger datasets, dramatically improving performance on various supervised learning tasks. However, the generalization is still far from human level, and it is difficult to understand on what the decisions made are based. To improve on generalization and understanding we revisit the problems of weight parameterizations in deep neural networks. We identify the most important, to our mind, problems in modern architectures: network depth, parameter efficiency, and learning multiple tasks at the same time, and try to address them in this thesis. We start with one of the core problems of computer vision, patch matching, and propose to use convolutional neural networks of various architectures to solve it, instead of manual hand-crafting descriptors. Then, we address the task of object detection, where a network should simultaneously learn to both predict class of the object and the location. In both tasks we find that the number of parameters in the network is the major factor determining it's performance, and explore this phenomena in residual networks. Our findings show that their original motivation, training deeper networks for better representations, does not fully hold, and wider networks with less layers can be as effective as deeper with the same number of parameters. Overall, we present an extensive study on architectures and weight parameterizations, and ways of transferring knowledge between them
Moon, Todd K., i Krishna Kishor Noru. "WAVEFORM SIGNAL SHAPING USING WAVELET PARAMETERIZATIONS". International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607582.
Pełny tekst źródłaWe 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 parameterization is adapted using gradient descent. Tests indicate that the adaptation is able to capture major features of a desired spectrum, including spectral nulls and major lobes.
Hales, Jonathan Reid. "Divisors of Modular Parameterizations of Elliptic Curves". BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8472.
Pełny tekst źródłaKatz, Jeremy. "Evaluation of Surface Layer Parameterizations Using In-Situ Observations". FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2604.
Pełny tekst źródłaKim, Youngseob. "Air quality modeling : evaluation of chemical and meteorological parameterizations". Phd thesis, Université Paris-Est, 2011. http://pastel.archives-ouvertes.fr/pastel-00667777.
Pełny tekst źródłaQuaas, Johannes, i 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.
Pełny tekst źródłaGriffin, 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/.
Pełny tekst źródłaAdvisor: 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.
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.
Pełny tekst źródłaSolovev, 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.
Pełny tekst źródłaIncludes bibliographical references (p. 248-253).
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 representing the mesoscale eddies has not been investigated in detail. This thesis examines the role of eddies in a 105-years long basin scale eddy resolving simulation with the MIT General Circulation Model (GCM) forced by idealized wind stress and relaxation to prescribed meridional temperature; this thesis also evaluates the Fickian diffusive, the diabatic Green-Stone (GS) and the quasi-adiabatic Gent-McWilliams (GM) parameterizations in a diagnostic study and a series of coarse resolution experiments with the same model in the same configuration. The mesoscale eddies in the reference experiment provide a significant contribution to the thermal balance in limited areas of the domain associated with the upper 1000M of the boundary regions. Specifically designed diagnostic tests of the schemes show that the horizontal and vertical components of the parameterized flux are not simultaneously downgradient to the eddy heat flux. The transfer vectors are more closely aligned with the isopycnal surfaces for deeper layers, thus demonstrating the adiabatic nature of the eddy heat flux for deeper layers. The magnitude of the coefficients is estimated to be consistent with traditionally used values. However, the transfer of heat associated with timedependent motions is identified as a complicated process that cannot be fully explained with any of the local parameterization schemes considered. The eddy parameterization schemes are implemented in the coarse resolution configuration with the same model. A series of experiments exploring the schemes' parameter space demonstrate that Fickian diffusion has the least skill in the climatological simulations because it overestimates the temperature of the deep ocean and underestimates the total heat transport. The GS and GM schemes perform better in the simulation of the bulk climatological properties of the reference solution, although the GM scheme in particular produces an ocean that is consistently colder than the reference state. Comparison of the eddy heat flux divergence with the parameterized divergences for typical parameter values demonstrates that the success of the schemes in the climatological simulation is not related to the representation of the eddy heat flux but to the representation of the overall internal mixing processes.
by Mikhail A. Solovev.
Ph.D.
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/.
Pełny tekst źródłaJerg, 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.
Pełny tekst źródłaZidikheri, Meelis Juma, i 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.
Pełny tekst źródłaPeÌrez, PeÌrez 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.
Pełny tekst źródłaAntritter, Felix [Verfasser]. "Tracking Controller Design for Nonlinear Dynamics using Differential Parameterizations / Felix Antritter". Aachen : Shaker, 2007. http://d-nb.info/1166511219/34.
Pełny tekst źródłaKomacek, Thaddeus D., i Dorian S. Abbot. "EFFECT OF SURFACE-MANTLE WATER EXCHANGE PARAMETERIZATIONS ON EXOPLANET OCEAN DEPTHS". IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622455.
Pełny tekst źródłaWhisenhant, 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.
Pełny tekst źródłaZidikheri, 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.
Pełny tekst źródłaAtariah, 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.
Pełny tekst źródłaKwok, Wilfred. "Automating Radiotherapy: Parameterizations of Sensor Time Delay Compensators and the Separation Principle". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/954.
Pełny tekst źródłaSchemann, Vera, Bjorn Stevens, Verena Grützun i 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.
Pełny tekst źródłaLarson, 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.
Pełny tekst źródłaPieroth, Martin [Verfasser], Ulrich [Gutachter] Achatz i 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.
Pełny tekst źródłaPollmann, Friederike [Verfasser], i 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.
Pełny tekst źródłaNam, Christine C. W., i 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.
Pełny tekst źródłaIotti, 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.
Znajdź pełny tekst źródłaMartin, 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.
Pełny tekst źródłaIncludes bibliographic references (p. 77-83).
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-induced processes and yield improved flux estimates, modifications to the traditional flux parameterizations are explored. Modification to the bulk aerodynamic method involves incorporating sea state dependence into the roughness length calculation. For the inertial dissipation method, a new parameterization for the dimensionless dissipation rate is proposed. The modifications lead to improved momentum flux estimates for both methods.
by Michiko J. Martin.
S.M.
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.
Pełny tekst źródłaBrück, Heiner Matthias [Verfasser], Johannes [Akademischer Betreuer] Quaas, Johannes [Gutachter] Quaas i 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.
Pełny tekst źródłaMenon, Surabo, Jean-Louis Brenguier, Olivier Boucher, Paul Davison, Genio Anthony D. Del, Johann Feichter, Steven Ghan i in. "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.
Pełny tekst źródłaNam, Christine C. W., i 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.
Pełny tekst źródłaNam, Christine C. W., Johannes Quaas, Roel Neggers, Drian Colombe Siegenthaler-Le i 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.
Pełny tekst źródłaBörker, Janine [Verfasser], i 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.
Pełny tekst źródłaNam, Christine C. W., Johannes Quaas, Roel Neggers, Drian Colombe Siegenthaler-Le i 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.
Pełny tekst źródłaMenon, Surabo, Jean-Louis Brenguier, Olivier Boucher, Paul Davison, Genio Anthony D. Del, Johann Feichter, Steven Ghan i in. "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.
Pełny tekst źródłaFriedrich, Stefan Roland [Verfasser], Martin [Akademischer Betreuer] Buss, Jürgen [Gutachter] Adamy i 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.
Pełny tekst źródłaJuricke, Stephan [Verfasser], Thomas [Akademischer Betreuer] Jung i 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.
Pełny tekst źródłaSchemann, Vera, Bjorn Stevens, Verena Grützun i 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.
Pełny tekst źródłaQuaas, 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.
Pełny tekst źródłaPelletier, 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.
Pełny tekst źródłaThis thesis focuses on the numerical modelling of the air-sea coupling. Although they share some common features, these two physical environments are sufficiently dissimilar for their numerical treatment to be carried out by distinct models, each including their own specificities. The interactions between these two components are thus taken into account through coupling algorithms.Implementing such algorithms requires proper understanding of the oceanic and atmospheric modelling, most importantly in the vicinity of their common interface. Therefore a substantial part of this thesis dissects, analyzes and completes turbulent parameterization schemes, which are the numerical mechanisms, defined at a continuous level, through which the turbulent surface layer at the vicinity of the sea surface is treated. Two theoretically and numerically meaningful sources of errors in the standard numerical modelling of the air-sea interface have been isolated.The first source of error lies in the continuous formulation of the turbulent parameterizations, which are currently used in an incomplete manner, leading to mathematically irregular solution profiles. By carefully studying their theoretical bases, this thesis extends the parameterizations, allowing them to generate regular profiles within a standardized, bi-domain framework. Numerical investigations on physically relevant test cases show that including such an extension can result in considerable bias (of the order of 20%) in air-sea fluxes evaluations. From a theoretical perspective, carrying this extension leads to establishing simple criteria under which the air-sea coupling can be considered as coherent with respect to the two physical environments, and more importantly, to the turbulent parameterizations.The second source of error is algorithmic in essence: it is linked to the temporal discretization of the coupling mechanisms. Existing ad hoc methods do not guarantee perfect coherence of the air-sea fluxes from one model to the other. Global in time Schwarz algorithms, which have first been developed as domain decomposition methods, are good candidates for correcting these flaws, although their implementation to the air-sea context is a considerable challenge, given the complexity of this problem. Investigations on the numerical impact of such algorithms are carried out on simplified test cases. Thanks to the undertaken work on turbulent parameterizations, perspectives on the development of coupling algorithms are given, regarding both their coherence as per the aforementioned conditions, and the gradually increasing complexity of physical effects that are accounted for
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.
Pełny tekst źródłaSič, 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/.
Pełny tekst źródłaThe main goal of this thesis is to improve the aerosol representation in the CTM MOCAGE. The work may be divided into: the direct improvement of aerosol physical parameterizations, and the development of a data assimilation system able to assimilate aerosol optical depth (AOD) and lidar profiles. On the modelling side, the processes that underwent the important improvements were sea salt, desert dust and volcanic aerosol emissions, wet deposition and sedimentation. The ambition is related to improve the model biases compared to observations, and to implement more physically detailed schemes in the model. We evaluated the impacts of these changes and compared the modelled fields to observations. The implemented updates significantly enhanced the model agreement with the observations and the inter-model comparison data. The results also confirmed that large uncertainties in models can come from the use of different parameterizations. The aerosol data assimilation is implemented to further reduce the model uncertainties. The set of observation operators and their tangent linear and adjoint operators for AOD and lidar profile observations are developed to link the model and the observation space. Aerosol assimilation proved to be very efficient to reduce the differences between the model and the observations. The assimilated AOD observations were able to significantly improve the model performance in terms of AOD and concentrations. Assimilation of lidar measurements: the backscatter signal, the extinction and backscatter coefficients, also showed an efficient influence on the vertical profiles
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.
Pełny tekst źródłaAgar, 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.
Pełny tekst źródłaThesis Advisor (s): Irvine, Cynthia E. "December 2001." Includes bibliographical references (p. 311-313). Also available online.
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.
Pełny tekst źródłaThe 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 simulations of cases of cyclogenesis using three different convection parameterization schemes: Betts-Miller-Janjic (BMJ), Grell-Dévényi (GD) e Kain-Fritsch (KF), keeping the other physical options, to isolate the impact of using different parameterizations for convection. For the evaluation of simulated rainfall, verification skill scores were used in order to make an objective assessment of simulated rain field from the observed data set (TRMM and MERGE), also allowing a comparison between simulations with different schemes. The results of the skill scores showed that, in general, the WRF best represents the rain of lower thresholds, with indexes based positioning (ETS, POD and RAF) with values closer to the ideal. The BIAS score indicated that the area of light rain is usually overestimated, while moderate and heavy rain showed greater differences between simulations with KF and BMJ schemes and verified with the two sets of observed data. Differences in the verification scores showed that the way how the convective flows are treated by schemes exert great influence on the precipitation produced, with the largest differences being observed between the BMJ and KF schemes. The simulations with the BMJ, wich is a convective adjustment based scheme, produced clearly smaller areal coverage and rainfall volume, especially if compared to the simulations with the KF scheme. Along with lower production of precipitation, the simulations with the BMJ showed, on average, smaller partition of convective rainfall compared to others. The sea level pressure field showed no significant differences, with the WRF simulating consistently with the GFS-FNL analysis, the position and central pressure of the cyclones.
O modelo Weather Research and Forecasting (WRF) é utilizado na simulação de 26 casos de ciclogênese no sudeste da América do Sul, na região ciclogenética próxima da foz do Rio da Prata. As simulações compreenderam 26 casos de ciclogênese nos quais foi observada precipitação sobre a região, especialmente sobre o estado do Rio Grande do Sul. Tendo em vista o importante papel das parametrizações convectivas na produção de precipitação em um modelo numérico de previsão de tempo, este estudo visa avaliar a precipitação produzida nas simulações dos casos de ciclogênese utilizando três diferentes esquemas de parametrização da convecção: Betts-Miller-Janjic (BMJ), Grell-Dévényi (GD) e Kain-Fritsch (KF), mantendo as outras opções físicas constantes, de modo a isolar o impacto do uso das diferentes parametrizações para a convecção. Para a avaliação da precipitação simulada foram utilizados índices estatísticos, com o objetivo de avaliar objetivamente o campo de chuva simulado a partir do conjunto de dados observados (TRMM e MERGE), possibilitando também uma comparação entre as simulações com os diferentes esquemas. Os resultados dos índices mostraram que em geral, o WRF representa melhor a chuva dos limiares mais fracos, com índices baseados no posicionamento (ETS, POD e RAF) tendo valores mais próximos dos ideais. O índice BIAS indicou que a área de chuva fraca é, em geral, superestimada enquanto que a de chuva moderada a forte apresentou diferenças maiores entre as simulações com os esquemas KF e BMJ e na verificação com os dois conjuntos de dados observados. As diferenças nos índices mostraram que a forma como os fluxos convectivos são tratados pelos esquemas exerce grande influência na precipitação produzida, com as maiores diferenças sendo observadas entre os esquemas KF e BMJ. As simulações com o esquema BMJ, que é baseado no ajuste convectivo dos perfis, claramente produziram menor área e volume de chuva, principalmente se comparadas às simulações com o KF. Juntamente com menor produção de precipitação, as simulações com o BMJ apresentaram, em média, menor partição de precipitação convectiva se comparada às outras. O campo de pressão ao nível do mar não apresentou diferenças muito significativas, com o WRF simulando de forma consistente com as análises FNL-GFS, o posicionamento e pressão central do ciclone.
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.
Pełny tekst źródłaTouzé-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.
Pełny tekst źródłaHistorically, general circulation models have played a crucial role in warning policy makers and the general public of future climate change. However, in recent years, there has been a growing debate in the scientific community about the dominant paradigm on which these models have been developed: in particular, parameterizations, which are supposed to represent climate-relevant processes that are not resolved at the scale of the model grid, are sometimes questioned. The objective of our thesis is to conduct an epistemological analysis of parameterizations, focusing on the parameterizations used to represent atmospheric convection. The latter are sometimes based on the distinction between an environment and certain coherent atmospheric structures that we will call ``objects". We first look at the use of such objects in atmospheric science and at their role in our understanding of convection. We then focus on parametrizations themselves, and explain in which context convective parameterizations emerged, what were their historical motivations and how their formalism can be interpreted and justified today. We also question the status and the role of the tuning of free parameters contained in parameterizations. Finally, we expand our reflection to the comparison of several general circulation models in the Coupled Model Intercomparison Project (CMIP). The historical role and structural effects CMIP has had on climate research are analyzed
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.
Pełny tekst źródłaLitke, 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.
Pełny tekst źródłaLarsson, 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.
Pełny tekst źródłaIn 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, empirical curve-fits of the geometrical influence on the linear region resistance and the saturation current have been performed. In addition, tentative results of the locus of the saturation current versus saturation voltage for specific transistors have been obtained.