Дисертації з теми "Radiative transfer models (RTM)"
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Schlawin, Everett A. "Radiative Transfer Models of the Galactic Center." Oberlin College Honors Theses / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1249300204.
Повний текст джерелаZhang, Hongbin 1965. "A model radiative transfer problem." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277071.
Повний текст джерелаFrank, Martin [Verfasser]. "Partial Moment Models for Radiative Transfer / Martin Frank." Aachen : Shaker, 2005. http://d-nb.info/1186579609/34.
Повний текст джерелаHart, Quinn James 1965. "Surface and aerosol models for use in radiative transfer codes." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277334.
Повний текст джерелаBozzo, Alessio <1979>. "Atmospheric radiative transfer in multiple scattering conditions. Application to NWP models." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1874/1/bozzo_alessio_tesi.pdf.
Повний текст джерелаBozzo, Alessio <1979>. "Atmospheric radiative transfer in multiple scattering conditions. Application to NWP models." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1874/.
Повний текст джерелаImran, Hafiz Ali. "Remote Sensing Tools for Monitoring Grassland Plant Leaf Traits and Biodiversity." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/329592.
Повний текст джерелаSmeltzer, Charles David. "In comparing radiative transfer and chemical transport models on OMI NO2 retrievals." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31677.
Повний текст джерелаCommittee Chair: Dr. Yuhang Wang; Committee Member: Dr. Greg Huey; Committee Member: Dr. Michael Chang. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Caunt, Stuart Edward. "Analytical and numerical models of accretion disks." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265485.
Повний текст джерелаRobinson, Tyler D., Jonathan J. Fortney, and William B. Hubbard. "Analytic Scattering and Refraction Models for Exoplanet Transit Spectra." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/627105.
Повний текст джерелаMüller, Laura [Verfasser]. "Investigation of moment models for population balance equations and radiative transfer equations / Laura Müller." München : Verlag Dr. Hut, 2019. http://d-nb.info/1176251287/34.
Повний текст джерелаAvila, Matías. "Nonlinear subgrid finite element models for low Mach number flows coupled with radiative heat transfer." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/285809.
Повний текст джерелаLa descripción general del movimiento de un flujo implica la solución de las ecuaciones de Navier-Stokes compresibles, un problema de muy compleja estructura matemática. Estas ecuaciones proporcinan una descripción detallada de cualquier problema en mecánica de fluidos, que puede presentar distintos mecanismos no lineales que interactúan entre si. En función de la física del problema que se esté considerando, pueden derivarse modelos simplificados de las ecuaciones de Navier-Stokes mediante analisis dimensional, que ignoran algunos fenómenos físicos. Por otro lado, la transferencia de calor por radiación puede interactuar con el movimiento de un fluido, e ignorar sus efectos puede tener consecuencias importantes en las predicciones del flujo. Problemas donde hay fuego implican la evaluacion del efecto del calor por radiación. El presente trabajo está dirigido a flujos a bajo número de Mach térmicamente acoplados, donde el calor por radiación afecta al flujo. Debido a la complejidad del problema matemático, la solución numérica es muy complicada. A pesar de las diferencia en el tratamiento de la incompresibilidad, las ecuaciones de flujo a bajo número de Mach poseen una estructura matemática similar a la de flujo incompresible, en el sentido que la presión mecánica se determina a partir de la ecuación de conservación de la masa. En consecuencia poseen el mismo tipo de inestabilidades numéricas, que son el problema de condiciones de compatibilidad entre los espacios de elementos finitos de velocidad y presión, y las inestabilidades debidas a flujos con convección dominante. Estas inestabilidades pueden evitarse mediante técnicas de estabilización numérica. Muchos métodos de estabilización utilizados hoy día se basan en el método de multiscalas variacionales, donde el espacio funcional de la solucion se divide en un espacio discreto y resolubre y un espacio infinito de subscalas. El modelado de las subescalas y su influencia modifican el problema discreto proporcionando estabilidad. La calidad de la aproximación numérica final (precisión, eficiencia) depende del modelo particular de subescalas. En este trabajo se extienden estas técnicas de estabilización a problemas no lineales y acoplados. Las características que distinguen a nuestra aproximación son considerar las subsecalas como transitorias y mantener la división de escalas en todos los términos no lineales que aparecen en las ecuaciones de elementros finitos y en las del modelo de subescalas. La primera característica permite obtener mayor precisión y mejor estabilidad en la solución, la segunda característica permite obtener esquemas donde las propiedades se conservan globalmente, y mayor precisión del método. El hecho de mantener la división de escalas en todos los términos no lineales está intimamemte relacionado con el modelado de turbulencia en flujos térmicamente acoplados desde un punto de vista estrictamente numérico. La capacidad de simulación de flujo turbulento es una medida de la habilidad de modelar el efecto de las estructuras de escala fina sobre las estructuras de escala gruesa. Se muestra en esta tesis el desempeño del método para de predecir flujo turbulento. La ecuación de transporte de radiación también se aproxima numéricamente en el marco de multiscala variacional. El diseño y análisis de este método se presenta en detalle en esta tesis
Schlenz, Florian. "Coupled land surface and radiative transfer models for the analysis of passive microwave satellite observations." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-147374.
Повний текст джерелаKattenborn, Teja [Verfasser], and S. [Akademischer Betreuer] Schmidtlein. "Linking Canopy Reflectance and Plant Functioning through Radiative Transfer Models / Teja Kattenborn ; Betreuer: S. Schmidtlein." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1174992263/34.
Повний текст джерелаJones, David C. "Validation of scattering microwave radiative transfer models using an aircraft radiometer and ground-based radar." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284065.
Повний текст джерелаHowett, Carly Jacqueline Amy. "Laboratory measurements of ammonia ice and ammonium hydrosulphide ice for use in Jovian radiative transfer models." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437054.
Повний текст джерелаEkberg, Christopher. "Verification of the Incidence Angle Dependence within the Satellite Microwave Radiative Transfer Model, RadTb." Honors in the Major Thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/437.
Повний текст джерелаBachelors
Engineering and Computer Science
Computer Engineering
Lee, Graham Kim Huat. "Glass rain : modelling the formation, dynamics and radiative-transport of cloud particles in hot Jupiter exoplanet atmospheres." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/11740.
Повний текст джерелаHaworth, Thomas James. "Radiation hydrodynamic models and simulated observations of radiative feedback in star forming regions." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/14465.
Повний текст джерелаTse, Oliver [Verfasser]. "SPn-systems in Radiative Heat Transfer and Natural Convection-Radiation Models: Parameter Identification and Optimal Control / Oliver Tse." München : Verlag Dr. Hut, 2011. http://d-nb.info/101560496X/34.
Повний текст джерелаMohan, Mahesh. "Polarimetric models of circumstellar discs including aggregate dust grains." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17229.
Повний текст джерелаPalazzi, Elisa <1978>. "Retrieval of trace gases vertical profile in the lower atmosphere combining. Differential Optical Absorption Spectroscopy with radiative transfer models." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/983/1/Tesi_Palazzi_Elisa.pdf.
Повний текст джерелаPalazzi, Elisa <1978>. "Retrieval of trace gases vertical profile in the lower atmosphere combining. Differential Optical Absorption Spectroscopy with radiative transfer models." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/983/.
Повний текст джерелаErbas, Cihan. "Validation of remotely-sensed soil moisture observations for bare soil at 1.4 GHz a quantitative approach through radiative transfer models to characterize abrupt transitions caused by a ponding event in an agricultural field, modifications to the radiative transfer models, and a mobile ground-based system /." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3371777.
Повний текст джерелаSchlenz, Florian [Verfasser], and Wolfram [Akademischer Betreuer] Mauser. "Coupled land surface and radiative transfer models for the analysis of passive microwave satellite observations / Florian Schlenz. Betreuer: Wolfram Mauser." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1025821963/34.
Повний текст джерелаWalker, Christina H. "Monte Carlo radiation transfer studies of protoplanetary environments." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/218.
Повний текст джерелаHachinger, Stephan [Verfasser], Wolfgang [Akademischer Betreuer] Hillebrandt, and Wolfram [Akademischer Betreuer] Weise. "Analysis of spectra of Type I Supernovae with radiative transfer models / Stephan Hachinger. Gutachter: Wolfgang Hillebrandt ; Wolfram Weise. Betreuer: Wolfgang Hillebrandt." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1014329744/34.
Повний текст джерелаPetkova, Maya Atanasova. "Cloudy with a chance of starlight : coupling of smoothed particle hydrodynamics and Monte Carlo radiative transfer for the study of ionising stellar feedback." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16557.
Повний текст джерелаRobertson, Scott James. "Hawking radiation in dispersive media." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1900.
Повний текст джерелаHamilton, Steven. "A Time-Dependent Slice Balance Method for High-Fidelity Radiation Transport Computations." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14608.
Повний текст джерелаZernickel, Alexander [Verfasser], Peter [Akademischer Betreuer] Schilke, and Volker [Akademischer Betreuer] Ossenkopf. "Submm Observations of Massive Star Formation in the Giant Molecular Cloud NGC 6334 : Gas Kinematics with Radiative Transfer Models / Alexander Zernickel. Gutachter: Peter Schilke ; Volker Ossenkopf." Köln : Universitäts- und Stadtbibliothek Köln, 2015. http://d-nb.info/1072500493/34.
Повний текст джерелаPattnaik, Aliva. "Parallel Performance Analysis of The Finite Element-Spherical Harmonics Radiation Transport Method." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14069.
Повний текст джерелаVentress, Lucy Jane. "Atmospheric Sounding using IASI." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:7ad570a3-35ad-4d98-93bb-7e1549afcdcd.
Повний текст джерелаGalarça, Marcelo Moraes. "Modelagem espectral da radiação em processos de combustão baseada no método do número de onda acumulado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26539.
Повний текст джерелаThis work presents a modification of the cumulative wavenumber (CW) method to determine the radiative transfer in non-uniform participating gases to enforce the radiative energy balance to be satisfied. In particular, the CW model leads to results for the divergent radiative heat flux (or radiative volumetric heat source) that proved accurate in comparison to the benchmark solution ( LBL integration) for non-isothermal medium. However, as will be shown in this work, one important assumption of the method prevents it of satisfying the radiative energy balance when a non uniform medium is considered. As consequence, the radiative heat flux can present considerable deviation of the correct solution. The modified cumulative wavenumber (CWM) model was developed to keep the same value of the radiative volumetric heat source, but also to satisfy the radiative energy balance. The CWM model is applied together with the discrete ordinates method to solve the radiation heat transfer in a one-dimentional slab containing a uniform/non-uniform layer of typical gases from the methane or fuel oil combustion. The walls are black for the thermal radiation. The HITRAN and HITEMP are used to extract the spectral lines information that is required for modeling. The database are briefly presented as well as the procedure that is used to extract the data and the spectra drawing. Firstly, uniform media (isothermal and homogeneous) are analyzed proving that the original model (CW) presents accurate results in those cases. Next, non-uniform media (non-isothermal and homogeneous; or non-isothermal and non-homogeneous) are taken into account. The results of both the CW and the CWM modeling are compared to the benchmark line-by-line (LBL) integration. Different temperature and concentration profiles are considered. The solution obtained from the new model presents an increase in the computational time due to the insertion of new iterative loops. The results show that the CWM leads to accurate estimation of both the radiative heat flux and volumetric heat source, satisfying the radiative energy balance with an error that is mostly due to the spatial discretization of the radiative transfer equation.
Ayliffe, Benjamin A. "Giant planet formation and migration." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/85873.
Повний текст джерелаHall, Cassandra. "Using numerical simulations to identify observational signatures of self-gravitating protostellar discs." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29585.
Повний текст джерелаJiang, Jingyi. "Retrieving leaf and canopy characteristics from their radiative properties using physically based models : from laboratory to satellite observations Estimation of leaf traits from reflectance measurements: comparison between methods based on vegetation indices and several versions of the PROSPECT model a model of leaf optical properties accounting for the differences between upper and lower faces Speeding up 3D radiative transfer simulations: a physically based approximation of canopy reflectance dependency on wavelength, leaf biochemical composition and soil reflectance Effective GAI for crops is best estimated from reflectance observations as compared to GAI and LAI Optimal learning for GAI and chlorophyll estimation from 1D and 3D radiative transfer model inversion: the case of wheat and maize crops observed by Sentinel2." Thesis, Avignon, 2019. http://www.theses.fr/2019AVIG0708.
Повний текст джерелаMeasuring leaf and canopy characteristics from remote sensing acquisitions is an effective and non destructive way to monitor crops both for decision making within the smart agriculture practices or for phenotyping under field conditions to improve the selection efficiency. With the advancement of computer computing power and the increasing availability of high spatial resolution images, retrieval methods can now benefit from more accurate simulations of the Radiative Transfer (RT) models within the vegetation. The objective of this work is to propose and evaluate efficient ways to retrieve leaf and canopy characteristics from close and remote sensing observations by using RT models based on a realistic description of the leaf and canopy structures. At the leaf level, we first evaluated the ability of the different versions of the PROSPECT model to estimate biochemical variables like chlorophyll (Cab), water and dry matter content. We then proposed the FASPECT model to describe the optical properties differences between the upper and lower leaf faces by considering a four-layer system. After calibrating the specific absorption coefficients of the main absorbing material, we validated FASPECT against eight measured ground datasets. We showed that FASPECT simulates accurately the reflectance and transmittance spectra of the two faces and overperforms PROSPECT for the upper face measurements. Moreover, in the inverse mode, the dry matter content estimation is significantly improved with FASPECT as compared to PROSPECT. At the canopy level, we used the physically based and unbiased rendering engine, LuxCoreRender to compute the radiative transfer from a realistic 3D description of the crop structure. We checked its good performances by comparison with the state of the art 3D RT models using the RAMI online model checker. Then, we designed a speed-up method to simulate canopy reflectance from a limited number of soil and leaf optical properties. Based on crop specific databases simulated from LuxCoreRender for wheat and maize and crop generic databases simulated from a 1D RT model, we trained some machine learning inversion algorithms to retrieve canopy state variables like Green Area Index GAI, Cab and Canopy Chlorophyll Content (CCC). Results on both simulations and in situ data combined with SENTINEL2 images showed that crop specific algorithms outperform the generic one for the three variables, especially when the canopy structure breaks the 1D turbid medium assumption such as in maize where rows are dominant during a significant part of the growing season
Poitou, Damien. "Modélisation du rayonnement dans la simulation aux grandes échelles de la combustion turbulente." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT035G/document.
Повний текст джерелаSimulation of turbulent combustion has gained high potential with the Large Eddy Simulation (LES) approach, allowing to predict unsteady turbulent reactive flows. In this context, taking into account radiation rises new fundamental and practical questions. Indeed the physics involved in radiation and in combustion are completely different : combustion is controlled by local exchanges and finite times whereas radiation is instantaneous and is based on non-local exchanges. In a first step, the impact of LES modelling of turbulent combustion on radiation is regarded. This question is treated in the more general frame of the turbulence-radiation interaction. From theoretical and numerical studies, it is shown that this interaction is weak in the LES context so that LES solutions can be directly coupled to radiative calculations, without further modelling. Then the unsteady coupling of radiation and turbulent combustion is realised. A key point is the reduction of calculation time of radiation, and several strategies are proposed. In particular a new global spectral model is introduced, using a tabulation technique and ensuring a sufficient level of accuracy. The radiative time calculation is finally decreased by two orders of magnitude, enabling the realization of a coupled calculation of a turbulent premixed flame
Moutier, William. "Utilisation de la cytométrie en flux pour une meilleure connaissance de la diffusion individuelle des particules : Application au phytoplancton." Thesis, Littoral, 2016. http://www.theses.fr/2016DUNK0439/document.
Повний текст джерелаThe objective was to use the flow cytometer (Cytosense, CityBuoy B.V., NL) to understand the influence of structural and morphological parameters of phytoplankton cells on the backscattering. We have analyzed the optical properties of the cells over different growth phases. A microcosm experiment was performed on two species (Thalassiosira pseudonana and Chlamydomonas Concordia) during 20 days. The forward and sideward efficiencies of Thalassiosira pseudonana were, respectively, 2.2 and 1.6 times higher than the efficiencies Chlamydomonas Concordia. The inter- and intra-species variations were explained by theoretical simulations and in situ measurements (biogeochemical and observations from scanning electron microscope). In situ measurements were used to obtain informations about the cell structure (e.g. thickness of the frustule). The forward efficiency was impacted by the aggregation and the cell size. The real refractive index of the chloroplast is a key parameter that could explain variations of the sideward efficiency. In the future, we recommend to use a two-layered sphere model (cytoplasm-chloroplast) to simulate the optical properties of phytoplankton cells. An analysis of the relationship between the particulate organic carbon concentration (POC) and the backscattering coefficient was performed. Strong linear relationships were observed only during the exponential phase. A reconstruction of the backscattering coefficient permitted to highlight that the POC was from phytoplankton cells origin for a species and bacterial origin for the other one
Hong, Seung-Ho. "Monte Carlo simulation of radiation heat transfer in a three-dimensional enclosure containing a circular cylinder." Thesis, 1994. http://hdl.handle.net/1957/35722.
Повний текст джерелаIMRAN, HAFIZ ALI. "Remote sensing tools for monitoring grassland plant leaf traits and biodiversity." Doctoral thesis, 2022. http://hdl.handle.net/10449/74719.
Повний текст джерелаLong, Alex R. "The iterative thermal emission Monte Carlo method for thermal radiative transfer." Thesis, 2012. http://hdl.handle.net/1957/33215.
Повний текст джерелаGraduation date: 2013
Gerstell, Marguerite F. "Part 1. Two radiative transfer models with terrestial applications. Part 2. Testing the porcupine plate hypothesis." Thesis, 1995. https://thesis.library.caltech.edu/5658/1/Gerstell_mf_1995.pdf.
Повний текст джерелаLiu, Dawei. "Improvement and use of radiative transfer models to assess lunar space weathering and mechanisms for swirl formation." 2015. http://hdl.handle.net/1805/7393.
Повний текст джерелаThis dissertation focuses on quantification of submicroscopic iron of different sizes, mineral abundance and grain size of lunar soils using Hapke's radiative transfer model. The main objective is to explore implications of these results for assessing the relative importance of solar wind implantation versus micrometeorite impacts for lunar space weathering as well as three hypotheses (solar wind deflection, comet impact and dust transport) for swirl formation on the Moon. Results from this study can help to make connections between ordinary chondritic meteorites and asteroids, and put physical and chemical constraints on heating processes in the early solar system.
Qu, Yan. "Silicon wafer surface temperature measurement using light-pipe radiation thermometers in rapid thermal processing systems." Thesis, 2006. http://hdl.handle.net/2152/2794.
Повний текст джерелаStone, Kenneth A. "Modeled and observed longwave radiances at the top of the atmosphere." Thesis, 1990. http://hdl.handle.net/1957/28726.
Повний текст джерелаGraduation date: 1991
Qualey, Douglas L. "Radiation from an infinite plane to parallel rows of infinitely long tubes - hottel extended." Thesis, 1994. http://hdl.handle.net/1957/35314.
Повний текст джерелаGraduation date: 1995
Wang, Chenxi. "Investigation of Thin Cirrus Cloud Optical and Microphysical Properties on the Basis of Satellite Observations and Fast Radiative Transfer Models." Thesis, 2013. http://hdl.handle.net/1969.1/151213.
Повний текст джерелаLuderer, Gunnar. "Modeling and application of multispectral oceanic sun glint observations." Thesis, 2003. http://hdl.handle.net/1957/28762.
Повний текст джерелаGraduation date: 2004
Cleveland, Mathew A. "Radiative heat transfer in combustion applications : parallel efficiencies of two gas models, turbulent radiation interactions in particulate laden flows, and coarse mesh finite difference acceleration for improved temporal accuracy." Thesis, 2011. http://hdl.handle.net/1957/26119.
Повний текст джерелаGraduation date: 2012