Log in

Relevant bibliographies by topics / Radiation Estimation Model / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Radiation Estimation Model.

Dissertations / Theses on the topic 'Radiation Estimation Model'

Author: Grafiati

Published: 6 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 39 dissertations / theses for your research on the topic 'Radiation Estimation Model.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Shah, Tejas Jagdish. "Online parameter estimation applied to mixed conduction/radiation." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/2361.

Full text

Abstract:

The conventional method of thermal modeling of space payloads is expensive and cumbersome. Radiation plays an important part in the thermal modeling of space payloads because of the presence of vacuum and deep space viewing. This induces strong nonlinearities into the thermal modeling process. There is a need for extensive correlation between the model and test data. This thesis presents Online Parameter Estimation as an approach to automate the thermal modeling process. The extended Kalman fillter (EKF) is the most widely used parameter estimation algorithm for nonlinear models. The unscented

APA, Harvard, Vancouver, ISO, and other styles

2

Anderson, Evelyn Carole. "Anumerical model for the estimation of solar radiation on rugged terrain /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125218402.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

CUNHA, RAQUEL D. S. da. "A comunicação dos riscos na preparação para emergências nucleares: um estudo de caso em Angra dos Reis, Rio de Janeiro." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28029.

Full text

Abstract:

Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-21T11:45:58Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-21T11:45:58Z (GMT). No. of bitstreams: 0<br>O gerenciamento de riscos em uma instalação nuclear é necessário para a segurança de trabalhadores e de populações vizinhas. Parte desse processo é a comunicação dos riscos que propicia o diálogo entre gestores da empresa e moradores das áreas de risco. A população que conhece os riscos a que está exposta, como esses riscos são gerenciados e o que deve ser feito em uma situação de emergência tende a se sentir mais segu

APA, Harvard, Vancouver, ISO, and other styles

4

Chow, Siu-choi, and 鄒小萃. "An evaluation of models for the estimation of hourly global solar irradiation in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1985. http://hub.hku.hk/bib/B31207224.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Jin, Kyoung-Wook. "Global oceanic rainfall estimation from AMSR-E data based on a radiative transfer model." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/3266.

Full text

Abstract:

An improved physically-based rainfall algorithm was developed using AMSR-E data based on a radiative transfer model. In addition, error models were designed and embedded in the algorithm to assess retrieval errors quantitatively and to reduce net retrieval uncertainties. The algorithm uses six channels (dual polarizations at 36.5, 18.7 and 10.65GHz) and retrieves rain rates on a pixel-by-pixel basis. Monthly rain totals are estimated by summing average rain rates computed by merging six rain rates based on proper weights that are estimated from error models. Error models were constructed based

APA, Harvard, Vancouver, ISO, and other styles

6

Holmgren, Johan. "Estimation of forest variables using airborne laser scanning /." Umeå : Dept. of Forest Resource Management and Geomatics, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s278.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

West, Rosalind Eleanor Lunzer. "Estimation of the indirect radiative effects of aerosol on climate using a general circulation model." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:bc1cc003-cf96-4b27-aad9-75ef7045dfc3.

Full text

Abstract:

The indirect effects of anthropogenic aerosols—through their interactions with clouds—are currently one of the most uncertain perturbations to the radiative energy balance at the top of the atmosphere. A crucial link between aerosol and cloud is that aerosols can act as cloud condensation nuclei (CCN). This microphysical process must be parameterised if the large-scale effects are to be represented in a general circulation model (GCM). Theoretical work presented in this thesis highlights the importance of incorporating the kinetic limitations on droplet formation in aerosol activation paramete

APA, Harvard, Vancouver, ISO, and other styles

8

Alfaro, Adriane Theodoro Santos. "MODELO DE ESTIMATIVA DA RADIAÇÃO LÍQUIDA E SUA APLICAÇÃO NA DETERMINAÇÃO DA EVAPOTRANSPIRAÇÃO POTENCIAL." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2009. http://tede2.uepg.br/jspui/handle/prefix/2207.

Full text

Abstract:

Made available in DSpace on 2017-07-25T19:29:46Z (GMT). No. of bitstreams: 1 ADRIANE ALFARO.pdf: 478436 bytes, checksum: 38077f5d85fcdb2030ceb8b23724f463 (MD5) Previous issue date: 2009-07-24<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This study aimed to assess and develop a physical mathematical model to estimats the net radiation. For this we used weather data collected from the meteorological station of the Department of Physics and Meteorology of the Escola Superior de Agricultura "Luis de Queiroz" - ESALQ - University of São Paulo - USP, Piracicaba, Brazil, accord

APA, Harvard, Vancouver, ISO, and other styles

9

Zamora, Ortega Lisett Rocio. "Estimativa da radiação solar global pelos modelos de Hargreaves e aprendizado de máquina em 11 regiões de São Paulo /Brasil /." Botucatu, 2020. http://hdl.handle.net/11449/192237.

Full text

Abstract:

Orientador: João Francisco Escobedo<br>Resumo: No presente trabalho é descrito o estudo comparativo de métodos de estimativas da irradiação solar global (HG) diária através do modelo de Hargreaves-Samani (H-S) HG/HO = a ΔT0,5 e duas técnicas de Aprendizado de Máquina (AM), Máquinas de Vetores de Suporte (MVS) e Redes Neurais Artificiais (RNA). A base de dados utilizada foi obtida em 11 cidades do estado de São Paulo de diferentes classificações climáticas no período de 2013-2017. Por meio de regressão entre a transmissividade atmosférica (HG/HO) e raiz quadrada da diferença de temperatura (ΔT0

APA, Harvard, Vancouver, ISO, and other styles

10

Janoutová, Růžena. "Modelling 3D Forest Structure for Improved Retrieval of Forest Biophysical Properties." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-263358.

Full text

Abstract:

Hlavním cílem práce bylo zlepšení kvantitativních odhadů vegetačních parametrů smrkových porostů pomocí spektrálních simulací trojrozměrného modelu přenosu záření. Prvně bylo potřeba vytvořit přesný 3D model smrku. Implementace přesného 3D modelu smrku pro parametrizaci celých lesních porostů je v současné době výpočetně nemožné, bylo tedy nutné tento 3D model smrku zjednodušit. Přesný 3D model smrku společně s dostupnými leteckými daty sloužil pro nalezení optimálního zjednodušení. Optimální model vedl ke kompromisu mezi výpočetní náročností a přesností výsledné odrazivosti z modelu přenosu z

APA, Harvard, Vancouver, ISO, and other styles

11

Tang, Chao. "Model estimations of possible climate changes of surface solar radiation at regional scales over Southern Africa and the South West Indian Ocean." Thesis, La Réunion, 2017. http://www.theses.fr/2017LARE0055/document.

Full text

Abstract:

Les variations du rayonnement solaire en surface (SSR) peuvent avoir un impact significatif sur divers aspects du système climatique, et notamment sur le développement socio-économique d’un pays. Pour identifier les impacts possibles du changement climatique sur le rayonnement solaire en surface à l'échelle régionale (~ 50 km) en Afrique australe jusqu'à la fin du 21ème siècle, on a analysé les données mensuelles produites dans le cadre du projet CORDEX-Afrique sur la période 1979-2099. Ces données sont issues des sorties de 5 modèles régionaux de climat (RCM) forcés par 10 modèles globaux de

APA, Harvard, Vancouver, ISO, and other styles

12

Oliveira, Leuda da Silva [UNESP]. "Estimativa da radiação solar direta na incidência nas partições instantânea, horária e diária a partir da radiação solar global." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/90720.

Full text

Abstract:

Made available in DSpace on 2014-06-11T19:24:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-03-01Bitstream added on 2014-06-13T19:31:43Z : No. of bitstreams: 1 oliveira_ls_me_fca.pdf: 2019828 bytes, checksum: 8dc8d60acc70b25a1970be06df70ff80 (MD5)<br>A partir de uma base de dados das radiações solar global e direta na incidência, desenvolveu-se no presente trabalho modelos de estimativas da radiação solar direta da incidência a partir da radiação solar global para as partições de tempo instantânea, horária e diária. Foi também equacionado o coeficiente de atenuação da radiação sol

APA, Harvard, Vancouver, ISO, and other styles

13

MOMESSO, ROBERTA G. R. A. P. "Desenvolvimento e validação de um referencial metodológico para avaliação da cultura de segurança de organizações nucleares." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28035.

Full text

Abstract:

Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-22T16:34:17Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-22T16:34:17Z (GMT). No. of bitstreams: 0<br>A cultura de segurança na área nuclear é definida como o conjunto de características e atitudes da organização e dos indivíduos que fazem que, com uma prioridade insuperável, as questões relacionadas à proteção e segurança nuclear recebam a atenção assegurada pelo seu significado. Até o momento, não existem instrumentos validados que permitam avaliar a cultura de segurança na área nuclear. Em vista disso, os resultados

APA, Harvard, Vancouver, ISO, and other styles

14

Gomes, Eduardo Nardini [UNESP]. "Medidas e modelos de estimativa da radiação direta na incidência: Eduardo Nardini Gomes. -." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/103457.

Full text

Abstract:

Made available in DSpace on 2014-06-11T19:32:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-06-20Bitstream added on 2014-06-13T19:22:15Z : No. of bitstreams: 1 gomes_en_dr_botfca.pdf: 907077 bytes, checksum: 3c29174b451dbb5fab685a7ddfaf7aa2 (MD5)<br>A radiação solar direta na incidência é uma fração da radiação solar global e possui aplicações na agronomia, biologia e na engenharia térmica. No trabalho, são descritas a evolução diurna das médias horárias e a evolução anual das médias mensais da radiação direta na incidência, no período de 1996 a 2003, em Botucatu/SP/Brasil. É apre

APA, Harvard, Vancouver, ISO, and other styles

15

Zhou, Mi. "Advancing Assessments on Aerosol Radiative Effect by Measurement-based Direct Effect Estimation and through Developing an Explicit Climatological Convective Boundary Layer Model." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14091.

Full text

Abstract:

The first part of the thesis assesses the aerosol direct radiative effect (ADRE) with a focus on ground-based AERONET and satellite MODIS measurements. The AERONET aerosol climatology is used, in conjunction with surface albedo and cloud products from MODIS, to calculate the ADRE and its normalized form (NADRE) for distinct aerosol regimes. The NADRE is defined as the ADRE normalized by optical depth at 550 nm and is mainly determined by internal aerosol optical properties and geographical parameters. These terms are evaluated for cloud-free and cloudy conditions and for all-mode and fine-mode

APA, Harvard, Vancouver, ISO, and other styles

16

Petit, Tristan. "Caractérisation des fonds marins et estimation bathymétrique par inversion de modèle de transfert radiatif : application à l'imagerie hyperspectrale en milieu coralien." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0023/document.

Full text

Abstract:

L’imagerie hyperspectrale aéroportée constitue un candidat potentiel pour la cartographie et le suivi des récifs coralliens à large échelle et à forte résolution spatiale. Dans cette thèse, nous présentons tout d’abord les traitements à appliquer au signal hyperspectral afin d’en extraire des informations sur la nature du fond marin, la bathymétrie et les propriétés optiques de l’eau, et nous les mettons en perspectives devant deux principaux verrous : (i) le faible rapport signal sur bruit du signal mesuré, (ii) le nombre et la variabilité des interactions onde-matière ayant lieu entre l’entr

APA, Harvard, Vancouver, ISO, and other styles

17

Wang, Wei-Min. "Estimation of component temperatures of vegetative canopy with Vis/NIR and TIR multiple-angular data through inversion of vegetative canopy radiative transfer model." Strasbourg, 2009. http://www.theses.fr/2009STRA6027.

Full text

Abstract:

Les mesures de la température de brillance des couverts végétaux s’appliquent à de très nombreux domaines comme la climatologie, l’hydrologie, l’agronomie, écologie. Son intérêt principal est de permettre d’accéder à l’estimation du bilan énergétique de la surface. Les mauvaises performances des modèles actuels en terme de restitution de la température de surface sont attribuées, en grande partie, à l'hétérogénéité des surfaces continentales. Les modèles actuels sont inaptes à rendre compte correctement des flux dans ces conditions (même éventuellement avec une correction de type kB-1). Les es

APA, Harvard, Vancouver, ISO, and other styles

18

Wang, Wei-Min Li Zhao-Liang. "Estimation of component temperatures of vegetative canopy with Vis/NIR and TIR multiple-angular data through inversion of vegetative canopy radiative transfer model." Strasbourg : Université de Strasbourg, 2009. http://eprints-scd-ulp.u-strasbg.fr:8080/00001118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Souza, Glauber Kiss de. "Avaliação do emprego de RNAs para estimativa da irradiância difusa horizontal horária." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7490.

Full text

Abstract:

Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2019-01-21T15:12:53Z No. of bitstreams: 1 Glauber Kiss de Souza_.pdf: 40241717 bytes, checksum: 3dc0ad681450d2649debe6ae4f8b1ef5 (MD5)<br>Made available in DSpace on 2019-01-21T15:12:53Z (GMT). No. of bitstreams: 1 Glauber Kiss de Souza_.pdf: 40241717 bytes, checksum: 3dc0ad681450d2649debe6ae4f8b1ef5 (MD5) Previous issue date: 2018-12-04<br>CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A energia solar está, mundialmente, em uma crescente expansão. Apesar de pequena, se comparada a outros meios tradicionais de

APA, Harvard, Vancouver, ISO, and other styles

20

Dal, Pai Alexandre [UNESP]. "Anisotropia da irradiância solar difusa medida pelo método de sombreamento Melo-Escobedo: fatores de correção anisotrópicos e modelos de estimativa." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/101722.

Full text

Abstract:

Made available in DSpace on 2014-06-11T19:31:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-02-02Bitstream added on 2014-06-13T20:22:25Z : No. of bitstreams: 1 dalpai_a_dr_botfca.pdf: 1486803 bytes, checksum: b52df39020b92a64e3e55443e73fcbef (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Universidade Estadual Paulista (UNESP)<br>No presente trabalho é apresentado um modelo de correção anisotrópico para radiação difusa medida com anel de sombreamento Melo-Escobedo (ME) em função do índice de claridade (razão da radiação global pela extraterrestre).

APA, Harvard, Vancouver, ISO, and other styles

21

Gomes, Eduardo Nardini 1975. "Medidas e modelos de estimativa da radiação direta na incidência / Eduardo Nardini Gomes. -." Botucatu : [s.n.], 2006. http://hdl.handle.net/11449/103457.

Full text

Abstract:

Orientador: João Francisco Escobedo<br>Banca: João Carlos Cury Saad<br>Banca: Flávio Ferrari Aragon<br>Banca: Amauri Pereira de Oliveira<br>Banca: Emerson Galvani<br>Resumo: A radiação solar direta na incidência é uma fração da radiação solar global e possui aplicações na agronomia, biologia e na engenharia térmica. No trabalho, são descritas a evolução diurna das médias horárias e a evolução anual das médias mensais da radiação direta na incidência, no período de 1996 a 2003, em Botucatu/SP/Brasil. É apresentada ainda a proposta e a validação dos modelos estatísticos de estimativa de Liu & Jo

APA, Harvard, Vancouver, ISO, and other styles

22

Oliveira, Leuda da Silva. "Estimativa da radiação solar direta na incidência nas partições instantânea, horária e diária a partir da radiação solar global /." Botucatu : [s.n.], 2001. http://hdl.handle.net/11449/90720.

Full text

Abstract:

Orientador: João Francisco Escobedo<br>Banca: Dinival Martins<br>Banca: Roberto Naves Domingues<br>Resumo : A partir de uma base de dados das radiações solar global e direta na incidência, desenvolveu-se no presente trabalho modelos de estimativas da radiação solar direta da incidência a partir da radiação solar global para as partições de tempo instantânea, horária e diária. Foi também equacionado o coeficiente de atenuação da radiação solar direta ela atmosfera (K) em função do índice de claridade (K). Os modelos foram gerados a partir da função logística modificada de Boltzmann, no período

APA, Harvard, Vancouver, ISO, and other styles

23

Kandasamy, Sivasathivel. "Leaf Area Index (LAI) monitoring at global scale : improved definition, continuity and consistency of LAI estimates from kilometric satellite observations." Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-00967319.

Full text

Abstract:

Monitoring biophysical variables at a global scale over long time periods is vital to address the climatechange and food security challenges. Leaf Area Index (LAI) is a structure variable giving a measure of the canopysurface for radiation interception and canopy-atmosphere interactions. LAI is an important variable in manyecosystem models and it has been recognized as an Essential Climate Variable. This thesis aims to provide globaland continuous estimates of LAI from satellite observations in near-real time according to user requirements to beused for diagnostic and prognostic evaluations of

APA, Harvard, Vancouver, ISO, and other styles

24

Hee, Sonke. "Computational Bayesian techniques applied to cosmology." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273346.

Full text

Abstract:

This thesis presents work around 3 themes: dark energy, gravitational waves and Bayesian inference. Both dark energy and gravitational wave physics are not yet well constrained. They present interesting challenges for Bayesian inference, which attempts to quantify our knowledge of the universe given our astrophysical data. A dark energy equation of state reconstruction analysis finds that the data favours the vacuum dark energy equation of state $w {=} -1$ model. Deviations from vacuum dark energy are shown to favour the super-negative ‘phantom’ dark energy regime of $w {< } -1$, but at low st

APA, Harvard, Vancouver, ISO, and other styles

25

Dal, Pai Alexandre 1974. "Anisotropia da irradiância solar difusa medida pelo método de sombreamento Melo-Escobedo : fatores de correção anisotrópicos e modelos de estimativa /." Botucatu : [s.n.], 2005. http://hdl.handle.net/11449/101722.

Full text

Abstract:

Orientador: João Franscisco Escobedo<br>Banca: Luiz Roberto Angelocci<br>Banca: Paulo Ademar Martins Leal<br>Banca: Roberto Vicente Calheiros<br>Banca: Augusto José Pereira Filho<br>Resumo: No presente trabalho é apresentado um modelo de correção anisotrópico para radiação difusa medida com anel de sombreamento Melo-Escobedo (ME) em função do índice de claridade (razão da radiação global pela extraterrestre). São propostos ainda dois modelos estatísticos da fração difusa isotrópica ( ) e anisotrópica ( ) em função do índice de claridade na estimativa das irradiações horária, diária e mensal. A

APA, Harvard, Vancouver, ISO, and other styles

26

Bosi, Cristiam. "Parameterization and evaluation of mechanistic crop models for estimating Urochloa brizantha cv. BRS Piatã productivity under full sun and in silvopastoral system." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-15052018-142008/.

Full text

Abstract:

Silvopastoral systems are a kind of agroforestry system in which trees or shrubs are combined with animals and pastures. Silvopastoral systems are important to intensify pasture production and mitigate climate change effects. However, very few studies have been performed to adapt crop models to simulate these systems. The aim of this study was to parameterize and test the mechanistic crop models APSIM and CROPGRO for estimating Urochloa brizantha cv. BRS Piatã productivity under full sun and in a silvopastoral system, to evaluate the models\' performance to simulate tree-crop interactions, and

APA, Harvard, Vancouver, ISO, and other styles

27

Silva, Romilson Ferreira da. "Mapeamento da estimativa do saldo de radiação instantânea no médio são francisco com base em sensores remotos e o modelo de elevação digital." Universidade Federal de Alagoas, 2010. http://repositorio.ufal.br/handle/riufal/880.

Full text

Abstract:

The presented work aimed to estimate the balance of instantaneous radiation to Earth surface, through TM Landsat 5 images, making use of SEBAL algorithm in two situation: a) considering the Digital Elevation Model (DEM) and b) not considering the Digital Elevation Model (DEM). The studied area is located in the Brazil s northeast semi arid, between the states of Alagoas and Sergipe, region where São Francisco River borders both states. The used images are composed by seven spectral bands, concerning January 17, 1987; October 17, 1999 and December 07, 2006, at orbit 215 and point 67. It was v

APA, Harvard, Vancouver, ISO, and other styles

28

Jiang, 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.

Full text

Abstract:

La mesure des caractéristiques des feuilles et du couvert végétal par télédétection est un moyen efficace et non destructif d’effectuer un suivi des cultures, que ce soit pour la prise de décision dans la gestion d’itinéraires techniques an agriculture de précision ou pour le phénotypage au champ pour améliorer l'efficacité de la sélection variétale. Grâce à l’augmentation de la puissance de calcul des machines et à la disponibilité croissante d'images à haute résolution spatiale, les méthodes d’estimation peuvent maintenant bénéficier de simulations plus précises des modèles de transfert radi

APA, Harvard, Vancouver, ISO, and other styles

29

Hay, Timothy Deane. "MAX-DOAS measurements of bromine explosion events in McMurdo Sound, Antarctica." Thesis, University of Canterbury. Physics and Astronomy, 2010. http://hdl.handle.net/10092/5394.

Full text

Abstract:

Reactive halogen species (RHS) are responsible for ozone depletion and oxidation of gaseous elemental mercury and dimethyl sulphide in the polar boundary layer, but the sources and mechanisms controlling their catalytic reaction cycles are still not completely understood. To further investigate these processes, ground– based Multi–Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations of boundary layer BrO and IO were made from a portable instrument platform in McMurdo Sound during the Antarctic spring of 2006 and 2007. Measurements of surface ozone, temperature, pressure, h

APA, Harvard, Vancouver, ISO, and other styles

30

Sron, Seng thail. "Algorithmes intelligents de pilotages d'antennes reconfigurables à partir de données en bande de base pour la norme LTE." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0138.

Full text

Abstract:

Le développement des antennes modales, qui sont des antennes actives reconfigurables en diagramme de rayonnement mais pas en réseaux, a commencé pour pouvoir implémenter le dépointage électronique dans les téléphones portables. Cette solution est généralement réalisée par un réseau d’antennes, ce qui est très difficile, voire impossible, dans un téléphone portable. Le dépointage permettrait d’améliorer le bilan de liaison et d’augmenter le débit des données.Le premier objectif de cette thèse est donc de développer des antennes modales pour la norme LTE. Trois concepts d’antennes modales ont ét

APA, Harvard, Vancouver, ISO, and other styles

31

Duthoit, Sylvie. "Prise en compte de l'agrégation des cultures dans la simulation du transfert radiatif : importance pour l'estimation de l'indice foliaire (LAI), de la parcelle au paysage." Toulouse 3, 2006. http://www.theses.fr/2006TOU30230.

Full text

Abstract:

L'indice foliaire (LAI) est une variable clé pour l'étude du fonctionnement des surfaces végétales car elle conditionne les échanges de carbone et d'eau avec l'atmosphère. Les méthodes de mesures indirectes fournissent des estimations de LAI à partir de mesures de la fraction de trou in situ. Les méthodes d'estimation du LAI par inversion de modèle de réflectance à partir de données satellitaires utilisent généralement des modèles unidimensionnels car ils nécessitent peu de paramètres d'entrée. Dans les deux cas, les modèles reposent sur l'hypothèse que les éléments sont distribués de façon al

APA, Harvard, Vancouver, ISO, and other styles

32

Paiva, Yhasmin Gabriel. "Estimativa do índice de área foliar por métodos óticos e sensoriamento remoto para calibrar modelo ecofisiológico em plantios de eucalipto em áreas de relevo ondulado." Universidade Federal de Viçosa, 2009. http://locus.ufv.br/handle/123456789/5282.

Full text

Abstract:

Made available in DSpace on 2015-03-26T13:50:18Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1742312 bytes, checksum: dc42985c8c2356eecb3f0d6b67cfccab (MD5) Previous issue date: 2009-07-24<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The purpose of this study was to estimate the leaf area index (LAI) in eucalyptus forest plantations, using optical instruments and satellite imagery to evaluate the response to the physical and climatic conditions of the study area, and based on these data, calibrate and simulate yields with an ecophysiological growth model. The study

APA, Harvard, Vancouver, ISO, and other styles

33

Sanghai, Bishnu. "Techno-Economic Evaluation of Rooftop Photovoltaic Systems in the Indian Context." Thesis, 2016. https://etd.iisc.ac.in/handle/2005/4372.

Full text

Abstract:

Problems of greenhouse effect and depletion of conventional resources in the last two decades have resulted in a worldwide exponentially growing photovoltaic market for renewable power generation. The Indian government has recently announced a goal of achieving 100 GWe photovoltaic installations by 2022, out of which 40% is to be generated in the rooftop segment, thus making the power generation distributed in nature. This work identifies the different technological configurations for rooftop photovoltaic (RPV) and conducts their techno-economic feasibility analysis from the customer point of

APA, Harvard, Vancouver, ISO, and other styles

34

Adebayo, Sunday Adeniyi. "Empiral Models for Estimation of Clearness Index in Nigeria." Master's thesis, 2007. http://hdl.handle.net/10316/97900.

Full text

Abstract:

Documentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeiros<br>Knowledge of clearness index is essential in the design and assessment of solar application systems. Clearness index is the ratio of global solar radiation and extraterrestial solar radiation. However, actual measurements of global solar radiation are generally made only at a few places because of the cost of the equipment required as well as the care, skill and cost needed for its maintenance and re-calibration. Therefore this study is aimed at development of Angstrom-Prescott based empirical regression mo

APA, Harvard, Vancouver, ISO, and other styles

35

Lockart, Natalie A. "The development of a stochastic solar radiation model and its application in estimating evaporation." Thesis, 2013. http://hdl.handle.net/1959.13/1039337.

Full text

Abstract:

Research Doctorate - Doctor of Philosophy (PhD)<br>Global radiation is an important input for evaporation calculations; however, limited measurements exist. Current models for estimating global radiation are deterministic and do not give an estimate of the errors associated with the predicted radiation amounts. In this thesis, five stochastic models are developed to estimate the mean amount and associated uncertainty of global, direct and diffuse radiation from sunshine duration data. The modelled global radiation is used to estimate evaporation amounts using a variety of models, including the

APA, Harvard, Vancouver, ISO, and other styles

36

Hsieh, Ju-Han, and 謝如涵. "On Estimating the Common Mode Radiation from a Cable Attached to a Metallic Enclosure by Using a Dipole Model." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/76802895989321601877.

Full text

Abstract:

碩士<br>國立臺灣海洋大學<br>電機工程學系<br>103<br>This thesis proposes a method of predicting the far-field radiation from cables attached to a conducting enclosure at the early stage of the design and development phase without using an EMI chamber. The method combines an equivalent dipole model approximating with sinusoidal current distribution and Common-mode current measurement at some specified locations on the cable. First, we use CST Microwave Studio to simulate the whole setup mentioned above to obtain the far-field radiation as the measurement data and to extract the current distribution on the cabl

APA, Harvard, Vancouver, ISO, and other styles

37

Abraha, Michael Ghebrekristos. "Estimating solar radiation for water-use and yield simulations under present and projected future climate using Cropsyst." 2003. http://hdl.handle.net/10413/4136.

Full text

Abstract:

Agricultural scientists are faced with the challenge of producing enough food for the increasing world population. Hence the need to develop tools for managing soil and plant systems to increase food production in order to meet the world food demand in the future. Crop simulation models have become promising tools in predicting yield and related components fi'om a set of weather, soil, plant and management data inputs. This study describes the estimation of solar radiant density, a crucial input in crop simulation models; calibration and validation of a soil-plant growth simulator, CropSyst, f

APA, Harvard, Vancouver, ISO, and other styles

38

Yang, Ting-Sung, and 楊廷崧. "A Study of Estimating the Common-Mode Radiation from a Cable Attached to a Metallic Box by Using the Simple Dipole Antenna Model." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/c86778.

Full text

Abstract:

碩士<br>國立臺灣海洋大學<br>電機工程學系<br>106<br>This thesis proposes a method of predicting the far-field radiation from cables attached to a conducting enclosure at the early stage of the design and development phase without using an EMI chamber. The method combines an equivalent dipole model approximating with sinusoidal current distribution and Common-mode current measurement at some specified locations on the cable. First, we use CST Microwave Studio to simulate the whole setup mentioned above to obtain the far-field radiation as the measurement data and to extract the current distribution on the cabl

APA, Harvard, Vancouver, ISO, and other styles

39

Gerstenmaier, Jan Frank. "Public health implications of medical diagnostic radiation exposure." Diss., 2012. http://hdl.handle.net/10500/6085.

Full text

Abstract:

Radiation from Computed Tomography (CT) is now the major contributor to population radiation dose. Despite controversy around the dose-effect relationship of radiation from CT, the linear non-threshold (LNT) theory is endorsed by many authorities, and constitutes the basis of cancer risk estimates. The purpose of this study was (1) a literature review of radiobiological theories, and methods of dose saving stategies in CT; (2) to highlight the importance of dose saving in CT, and to demonstrate how dose can be saved in a radiology department: Following a 40% reduction in reference X-ray

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!