Relevant bibliographies by topics / Linear dispersion / Dissertations / Theses
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Dissertations / Theses on the topic 'Linear dispersion'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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1

Hayes, Robert Lee Jr. "Precoded Linear Dispersion Codes for Wireless MIMO Channels." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1131246446.

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2

Wu, Ka-yui Karl, and 胡家銳. "On some extensions of generalized linear models with varying dispersion." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48199370.

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When dealing with exponential family distributions, a constant dispersion is often assumed since it simplifies both model formulation and estimation. In contrast, heteroscedasticity is a common feature of almost every empirical data set. In this dissertation, the dispersion parameter is no longer considered as constant throughout the entire sample, but defined as the expected deviance of the individual response yi and its expected value _i such that it will be expressed as a linear combination of some covariates and their coefficients. At the same time, the dispersion regression is an
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3

Wolff-Piggott, Timothy. "Identifying predictors of evolutionary dispersion with phylogeographic generalised linear models." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25651.

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Discrete phylogeographic models enable the inference of the geographic history of biological organisms along phylogenetic trees. Frequently applied in the context of epidemiological modelling, phylogeographic generalised linear models were developed to allow for the evaluation of multiple predictors of spatial diffusion. The standard phylogeographic generalised linear model formulation, however, assumes that rates of spatial diffusion are a noiseless deterministic function of the set of covariates, admitting no other unobserved sources of variation. Under a variety of simulation scenarios, we
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4

Fernandes, Ray Stephen. "Very singular solutions of odd-order PDEs, with linear and nonlinear dispersion." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507233.

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Asymptotic properties of solutions of the linear dispersion equation ut = uxxx in R × R+, and its (2k + 1)th-order generalisations are studied. General Hermitian spectral theory and asymptotic behaviour of its kernel, for the rescaled operator B = D3 + 1 3 yDy + 1 3 I, is developed, where a complete set of bi-orthonormal pair of eigenfunctions, {ψβ}, {ψ∗β }, are found. The results apply to the construction of VSS (very singular solutions) of the semilinear equation with absorption ut = uxxx − |u|p−1u in R × R+, where p > 1, which serves as a basic model for various applications, including the
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5

Deng, Dianliang. "Goodness of fit, score test, zero-inflation and over-dispersion in generalized linear models." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ62314.pdf.

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6

Ajward, Ahamed Milhan. "Linear and non-linear optical properties of OMBD grown PTCDA and Alq3 films." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1331060164.

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7

Sabangan, Rainier Monteclaro. "Identification and Estimation of Location and Dispersion Effects in Unreplicated 2k-p Designs Using Generalized Linear Models." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1269014397.

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8

Moesser, Travis J. "Guidance and Navigation Linear Covariance Analysis for Lunar Powered Descent." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/654.

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A linear covariance analysis is conducted to assess closed-loop guidance, navigation, and control system (GN&C) performance of the Altair vehicle during lunar powered descent. Guidance algorithms designed for lunar landing are presented and incorporated into the closed-loop covariance equations. Navigation-based event triggering is also included in the covariance formulation to trigger maneuvers and control dispersions. Several navigation and guidance trade studies are presented demonstrating the influence of triggering and guidance and study parameters on the vehicle GN&C performance.
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9

Mores, Junior José Amilton. "Cálculo por elementos finitos dos parâmetros de dispersão de alta ordem de estruturas fotônicas." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260814.

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Orientador: Hugo Enrique Hernández Figueroa<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-18T02:45:36Z (GMT). No. of bitstreams: 1 MoresJunior_JoseAmilton_D.pdf: 15207023 bytes, checksum: 112938cdefab40754d08619dd4e4bb3a (MD5) Previous issue date: 2011<br>Resumo: Uma estratégia numérica eficiente para calcular os parâmetros de dispersão de alta ordem em guias ópticos e apresentada. No que e de nosso conhecimento, pela primeira vez na literatura um estudo sistemático dos erros envolvidos no proc
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10

Kalktawi, Hadeel Saleh. "Discrete Weibull regression model for count data." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14476.

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Data can be collected in the form of counts in many situations. In other words, the number of deaths from an accident, the number of days until a machine stops working or the number of annual visitors to a city may all be considered as interesting variables for study. This study is motivated by two facts; first, the vital role of the continuous Weibull distribution in survival analyses and failure time studies. Hence, the discrete Weibull (DW) is introduced analogously to the continuous Weibull distribution, (see, Nakagawa and Osaki (1975) and Kulasekera (1994)). Second, researchers usually fo
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11

Lee, Myungjun. "A VARIETY OF SLOW-LIGHT TECHNOLOGIES IN NONLINEAR DISPERSIVE MEDIA." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/145736.

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Over the past few years, researchers have directed a significant amount of effort towards realizing tunable all-optical devices using nonlinear optical methods. It is now possible to exercise dynamic control of the group velocity of light traveling through a wide variety of material systems. The slow and fast light refer to situations in which the group velocity íg of an optical pulse through a dispersive material can be made to be smaller and larger, respectively, than the phase velocity vp = c/n. This ability could overcome the remaining challenge in current optical networks of storing and m
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12

Gilles, Marin. "Effets de modulation de phase croisée dans les fibres à dispersion normale et leurs applications." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK036/document.

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Dans ce manuscrit, les effets émergeant de la modulation de phase croisée entredeux signaux polarisés orthogonalement dans des fibres optiques à dispersionnormale sont étudiés et leurs applications approfondies.En premier lieu, un générateur d’impulsions cadencées à 40-GHz a été développéen injectant deux ondes sinusoïdales en opposition de phase polariséesorthogonalement au sein d’une fibre optique à dispersion normale. Une grandedifférence de puissance entre les deux ondes induit un potentiel de phasepériodique pour la réplique de plus faible énergie, induisant ainsi dans régimede dispersion
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13

Bandegi, Mahdi. "A Coupled PDE Model for the Morphological Instability of a Multi-Component Thin Film During Surface Electromigration." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1386.

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In this thesis a model involving two coupled nonlinear PDEs is developed to study instability of a two-component metal film due to horizontal electric field and in a high-temperature environment similar to operational conditions of integrated circuits. The proposed model assumes the anisotropies of the diffusional mobilities for two atomic species, and negligible stresses in the film. The purpose of the modeling is to describe and understand the time-evolution of the shape of the film surface. Toward this end, the linear stability analysis (LSA) of the initially planar film surface with respec
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14

Eliasson, Peder. "Emittance preservation and luminosity tuning in future linear colliders." Doctoral thesis, Uppsala University, Department of Physics and Astronomy, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8576.

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<p>The future International Linear Collider (ILC) and Compact Linear Collider (CLIC) are intended for precision measurements of phenomena discovered at the Large Hadron Collider (LHC) and also for the discovery of new physics. In order to offer optimal conditions for such experiments, the new colliders must produce very-high-luminosity collisions at energies in the TeV regime.</p><p>Emittance growth caused by imperfections in the main linacs is one of the factors limiting the luminosity of CLIC and ILC. In this thesis, various emittance preservation and luminosity tuning techniques have been t
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15

Sousa, Keliny Martins de Melo. "Modelos lineares generalizados e modelos de dispersão aplicados à modelagem de sinistros agrícolas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-16032010-163501/.

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O presente trabalho tem por objetivo utilizar a abordagem dos modelos lineares generalizados e os modelos de dispersão no contexto do seguro agrícola. Os modelos lineares generalizados (MLG\'s) constituem uma extensão dos modelos lineares de regressão múltipla introduzida por Nelder e Wedderburn (1972), que inclui modelos cuja variável resposta pertence à família exponencial de distribuições. O MLG é formado por um componente aleatório, que possui distribuição pertencente à família exponencial, um componente sistemático, conectados por uma função de ligação. Jorgensen (1997) estende a utiliza
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16

BARROS, Fabiana Uchôa. "Matriz de covariâncias do estimador de máxima verossimilhança corrigido pelo viés em modelos lineares generalizados com parâmetro de dispersão desconhecido." Universidade Federal de Campina Grande, 2011. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1278.

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Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-07-27T16:10:22Z No. of bitstreams: 1 FABIANA UCHÔA BARROS - DISSERTAÇÃO PPGMAT 2011..pdf: 444205 bytes, checksum: dd1ada684703bcb400e631c5f044668b (MD5)<br>Made available in DSpace on 2018-07-27T16:10:22Z (GMT). No. of bitstreams: 1 FABIANA UCHÔA BARROS - DISSERTAÇÃO PPGMAT 2011..pdf: 444205 bytes, checksum: dd1ada684703bcb400e631c5f044668b (MD5) Previous issue date: 2011-12<br>Capes<br>Com base na expressão de Pace e Salvan (1997 pág. 30), obtivemos a matriz de covariâncias de segunda ordem dos estimadores de máxima ve
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17

Allein, Florian. "Linear and Nonlinear Waves in Magneto-granular Phononic Structures : Theory and Experiments." Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1014/document.

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Les cristaux granulaires sont des arrangements périodiques ou structurés de particules élastiques en contact. Ce travail de thèse porte sur l’étude théorique et expérimentale de la propagation d’ondes élastiques à travers de telles structures.Un cristal granulaire unidimensionnel composé d’une chaîne de billes d’acier couplées à des aimants permanents fixes est tout d’abord étudié. Les forces statiques de contact entre les billes, déterminantes pour les caractéristiques de la propagation et la dispersion des ondes élastiques, sont créées par le champ magnétique des aimants. Cette configuration
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18

Castañeda, Tutestar Juan Andrés 1987. "Interação laser-ruído em fibras ópticas no regime pulsado = aplicação na construção de mapas de dispersão de alta ordem." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277935.

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Orientador: Hugo Luis Fragnito<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-19T18:29:41Z (GMT). No. of bitstreams: 1 CastanedaTutestar_JuanAndres_M.pdf: 6184459 bytes, checksum: 92c32f647e9f3cbb607992b021c7924d (MD5) Previous issue date: 2012<br>Resumo: Estudamos a interação entre laser e ruído em fibras ópticas, sua dependência com dispersão cromática e sua aplicação para caracterizar flutuações dos parâmetros de dispersao ao longo da fibra. A interacao é governada pela polarização não-linear de terce
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19

Gregoratti, David. "Randomized space-time block coding for the multiple-relay channel." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6949.

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En la última década, la cooperación entre usuarios ha generado un gran interés por la posibilidad de mejorar la velocidad de transmisión en las redes de comunicaciones inalámbricas. El objetivo es formar un array con las antenas de todos los dispositivos y, de esta forma, aplicar técnicas de procesado espacio-temporal. El esquema de cooperación más sencillo es el canal con relays: todos los terminales que escuchen una comunicación entre dos puntos pueden ayudar a la fuente retransmitiendo lo que hayan recibido.<br/><br/>En un sistema realista, los relays no disponen de información sobre el can
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20

Jesus, Hugo Naves. "Método compacto de diferenças finitas para resolver equações de Schrödinger não lineares com dispersão de quarta ordem." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6495.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2016-11-10T11:15:34Z No. of bitstreams: 2 Dissertação - Hugo Naves de Jesus - 2016.pdf: 1851851 bytes, checksum: 71cb8f26f4f38eb5f89d99aafc926b66 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Jaqueline Silva (jtas29@gmail.com) on 2016-11-10T17:47:53Z (GMT) No. of bitstreams: 2 Dissertação - Hugo Naves de Jesus - 2016.pdf: 1851851 bytes, checksum: 71cb8f26f4f38eb5f89d99aafc926b66 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made
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21

Udy, Sandra. "Assessing Amendment Treatments for Sodic Soil Reclamation in Arid Land Environments." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7670.

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Plugged and abandoned well pads throughout the Uintah Basin face reclamation challenges due to factors including a harsh climate, invasive species, and high salt loads. Finding ways to alleviate soil sodicity could improve soil reclamation success. Gypsum, sulfur, activated carbon, and Biochar are being applied to improve soil parameters negatively impacted by sodicity, but the direct impact of these amendments on Uintah Basin soils is still largely unknown. The aim of this study was two-fold. (1) Evaluate the effectiveness of gypsum, sulfuric acid, Biochar, activated carbon, and combinations
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22

CASSADER, Marco. "Benchmark Tracking Portfolio Problems with Stochastic Ordering Constraints." Doctoral thesis, Università degli studi di Bergamo, 2015. http://hdl.handle.net/10446/62374.

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This work debates several approaches to solve the benchmark tracking problems and introduces different orders of stochastic dominance constraints in the decisional process. Portfolio managers usually address with the problem to compare their performance with a given benchmark. In this work, we propose different solutions for index tracking, enhanced indexation and active managing strategies. Firstly, we introduce a linear measure to deal with the passive strategy problem analyzing its impact in the index tracking formulation. This measure results to be not only theoretically suitable but also
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23

Roidot, Kristelle. "Numerical study of non-linear dispersive partial differential equations." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00692445.

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Numerical analysis becomes a powerful resource in the study of partial differential equations (PDEs), allowing to illustrate existing theorems and find conjectures. By using sophisticated methods, questions which seem inaccessible before, like rapid oscillations or blow-up of solutions can be addressed in an approached way. Rapid oscillations in solutions are observed in dispersive PDEs without dissipation where solutions of the corresponding PDEs without dispersion present shocks. To solve numerically these oscillations, the use of efficient methods without using artificial numerical dissipat
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24

Rudhall, Andrew Peter. "Ultrashort laser pulse shaping for novel light fields and experimental biophysics." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3682.

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Broadband spectral content is required to support ultrashort pulses. However this broadband content is subject to dispersion and hence the pulse duration of corresponding ultrashort pulses may be stretched accordingly. I used a commercially-available adaptive ultrashort pulse shaper featuring multiphoton intrapulse interference phase scan technology to characterise and compensate for the dispersion of the optical system in situ and conducted experimental and theoretical studies in various inter-linked topics relating to the light-matter interaction. Firstly, I examined the role of broadband ul
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25

Tsuruta, Kai Erik. "Construction of the wave operator for non-linear dispersive equations." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3546.

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In this thesis, we will study non-linear dispersive equations. The primary focus will be on the construction of the positive-time wave operator for such equations. The positive-time wave operator problem arises in the study of the asymptotics of a partial differential equation. It is a map from a space of initial data X into itself, and is loosely defined as follows: Suppose that for a solution Ψlin to the dispersive equation with no non-linearity and initial data Ψ+ there exists a unique solution Ψ to the non-linear equation with initial data ΨO such that Ψ behaves as Ψlin as t→ ∞. Then the w
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26

Vermelho, Alexandre Filipe Correia Cajana. "Calculating best estimates in a GLM framework. Frequency/severity models vs total loss models." Master's thesis, Instituto Superior de Economia e Gestão, 2014. http://hdl.handle.net/10400.5/7040.

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Mestrado em Ciências Actuariais<br>When using generalized linear models to predict future claim payments, should actuaries use separate frequency/severity models or a single loss cost model? This is the question this paper addresses, covering some theoretical background, testing both alternatives on real data from the Industrial Multiple Risks (IMR) sub-­‐branch and analysing its results. Data was provided by 7 companies operating in Portugal in the years 2010 and 2011, who own a 70% share of the Portuguese IMR market and was collected by Associação Portuguesa de Seguradores (APS).
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27

Santos, Andre Guimarães dos. "Interação sinal-ruído em fibras de baixa dispersão." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277947.

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Orientador: Hugo L. Fragnito<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-01T05:29:36Z (GMT). No. of bitstreams: 1 Santos_AndreGuimaraesdos_M.pdf: 3351365 bytes, checksum: 0e1ed8063f3c8e932b762f03dd8032bf (MD5) Previous issue date: 2001<br>Resumo: Esta tese apresenta estudos teóricos e experimentais sobre a interação sinal-ruído em fibras de baixa dispersão. Um modelo teórico, baseado em soluções da equação de onda, para o estudo da propagação não linear de um ou dois laseres foi desenvolvido e verific
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28

Robert, Tristan. "Sur le problème de Cauchy pour des EDP quasi-linéaires de nature dispersive." Thesis, Cergy-Pontoise, 2018. http://www.theses.fr/2018CERG0968/document.

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Dans cette thèse, on s'intéresse au problème de Cauchy pour des équations quasi-linéaires dispersives. Pour une telle équation, l'enjeu est de montrer l'existence et l'unicité d'une solution de l'équation avec une donnée initiale prescrite dans un espace fonctionnel le plus large possible. Nous étudierons deux modèles décrivant l'évolution de la surface d'un fluide satisfaisant certaines conditions physiques.La première partie est consacrée à l'étude de l'équation de Kadomtsev-Petviashvili avec forte tension de surface (KP-I). Cette équation possède une structure Hamiltonienne et admet donc un
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Sousa, Poliane Lima de. "Simetria de Lie de uma equação KdV com dispersão não-linear." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7461.

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Submitted by Izabel Franco (izabel-franco@ufscar.br) on 2016-09-23T14:42:46Z No. of bitstreams: 1 DissPLS.pdf: 887262 bytes, checksum: e54f2438d019bad9fa31a2f0e8b98d66 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-26T20:40:36Z (GMT) No. of bitstreams: 1 DissPLS.pdf: 887262 bytes, checksum: e54f2438d019bad9fa31a2f0e8b98d66 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-26T20:40:46Z (GMT) No. of bitstreams: 1 DissPLS.pdf: 887262 bytes, checksum: e54f2438d019bad9fa31a2f0e8b98d66 (MD5)<br>Made available in
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Tavares, Fernando Menezes Leitão. "Análise de códigos de dispersão linear com canal de realimentação não ideal." reponame:Repositório Institucional da UnB, 2009. http://repositorio.unb.br/handle/10482/6516.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2009.<br>Submitted by samara castro (sammy_roberta7@hotmail.com) on 2011-01-14T11:53:56Z No. of bitstreams: 1 2009_FernandoMenezesLTavares.pdf: 936492 bytes, checksum: 16bb4d66d78247fef5acf6a6198f2ec9 (MD5)<br>Approved for entry into archive by Marília Freitas(marilia@bce.unb.br) on 2011-01-19T16:45:35Z (GMT) No. of bitstreams: 1 2009_FernandoMenezesLTavares.pdf: 936492 bytes, checksum: 16bb4d66d78247fef5acf6a6198f2ec9 (MD5)<br>Made available in DSpace on 2011-01-19T16:45:35Z (GMT
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Fridgeirsdottir, Gudrun A. "The development of a multiple linear regression model for aiding formulation development of solid dispersions." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52176/.

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As poor solubility continues to be problem for new chemical entities (NCEs) in medicines development the use and interest in solid dispersions as a formulation-based solution has grown. Solid dispersions, where a drug is typically dispersed in a molecular state within an amorphous water-soluble polymer, present a good strategy to significantly enhance the effective drug solubility and hence bioavailability of drugs. The main drawback of this formulation strategy is the inherent instability of the amorphous form. With the right choice of polymer and manufacturing method, sufficient stability ca
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Martínez, Rodríguez Andrés Alfredo. "Efectos de dispersión lineal y advección por flujo externo en frentes en propagación." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2020. http://hdl.handle.net/20.500.12404/16942.

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Kuramoto-Sivashinsky equation in a two dimensional slab with infinite walls and advection by external flow is considered. Stationary front solutions were then found using the shooting method with simple Euler method and oscillatory front solutions were solved with simple Euler method. Numerical results for both were analyzed, finding the solutions for stationary fronts including external flow, Couette and Poiseuille. A modified Kuramoto-Sivashinsky equation, similar to the equation used to described solitary waves was also considered and the effect it had on stationary fronts with and without
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Nguyen, Tien Vinh. "Construction of dynamics with strongly interacting for non-linear dispersive PDE (Partial differential equation)." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX024/document.

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Cette thèse est consacrée à l’étude des propriétés dynamiques des solutions de type soliton d'équations aux dérivées partielles (EDP) dispersives non linéaires. `A travers des exemples-type de telles équations, l'équation de Schrödinger non-linéaire (NLS), l'équation de Korteweg-de Vries généralisée (gKdV) et le système de Schrödinger, on traite du comportement des solutions convergeant en temps grand vers des sommes de solitons (multi-solitons). Dans un premier temps, nous montrons que dans une configuration symétrique, avec des interactions fortes, le comportement de séparation des solitons
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Chavez, Boggio Jose Manuel. "Efeitos não lineares em fibras ópticas de dispersão deslocada." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277954.

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Orientador: Hugo Luis Fragnito<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-01T15:09:17Z (GMT). No. of bitstreams: 1 ChavezBoggio_JoseManuel_D.pdf: 2839364 bytes, checksum: 64cef58979830c191fd21fa67d893053 (MD5) Previous issue date: 2001<br>Resumo: Pesquisamos, teórica e experimentalmente, interações por mistura de quatro ondas entre lasers e ruído, em fibras ópticas de dispersão deslocada. É apresentada uma modelagem, no domínio da freqüência, para propagação do campo do ruído na presencia de um ou do
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Soares, Maria Elaine dos Santos. "Solução de um problema não linear do tipo reação-difusão na modelagem dispersão de insetos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/1588.

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Neste trabalho tratamos da solução de um problema não linear do tipo tração-difusão, na modelagem de dispersão de insetos. Começamos estabelecendo uma lei de conservação e a partir desta, deduzimos algumas equações importantes para o desenvolvimento do nosso estudo, tais como a equação de convecção, de difusão e simultaneamente convecção e difusão. Se considerarmos uma escala de tempo que possibilite a adição ou retirada de indivíduos no meio, conforme seja considerada reprodução, migração ou morte, podemos acrescentar ao processo difusivo um termo de reação, obtendo então, a equação do tipo r
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36

Banquet, Brango Carlos Alberto. "Existencia e estabilidade de ondas viajantes periodicas para alguns modelos dispersivos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/305952.

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Orientadores: Marcia Assumpção Guimarães Scialom, Jaime Angulo Pava<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica<br>Made available in DSpace on 2018-08-14T19:50:35Z (GMT). No. of bitstreams: 1 BanquetBrango_CarlosAlberto_D.pdf: 1282052 bytes, checksum: f15f0bcd3c49e3ffb900f598aafc2f73 (MD5) Previous issue date: 2009<br>Resumo: O objetivo da tese é estudar algumas propriedades de soluções de equações diferenciais dispersivas. Primeiro, estabelecemos uma teoria de boa colocação local e global para a equação de Benjamin-On
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Renn-Giles, Fabian. "Investigating spatio-temporal dynamics of non-linear dispersive nano-plasmonics with advanced time-domain simulation methods." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/31384.

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Over the last few decades, nano-fabrication techniques have evolved to such precision that novel optical material responses can be tailor-made to challenging specifications. This development has opened a new avenue to research areas such as nano-plasmonics and metamaterials, which investigate the behaviour of light on the nano-scale and promise a range of exciting new applications. A valuable tool for a better understanding of these systems are numerical simulations. However, the correct description of the phenomena in this new regime is however challenging as it inherently involves theories o
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Godói, André Cadime de. "Otimização linear robusta multitemporal de uma carteira de ativos com parâmetros de média e dispersão incertos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-09032012-133227/.

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Nos últimos anos, percebeu-se um avanço substancial das metodologias sistemáticas de seleção de ativos em portfólios financeiros, baseadas em técnicas de otimização. A maior pressão por desempenho sobre as gestoras de recursos e a evolução dos softwares e pacotes de otimização foram fatores que contribuíram para esse desenvolvimento. Dentre as técnicas mais reconhecidas utilizadas na gestão de portfólios está a de otimização robusta, cuja aplicação na solução de problemas com dados incertos iniciou-se na década de 1970 e, desde então, vem evoluindo em sofisticação. Partindo de uma extensão rec
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Machado, Renato. "Códigos de dispersão linear e comunicação cooperativa em canais de comunicações sem fio com realimentação limitada." Florianópolis, SC, 2008. http://repositorio.ufsc.br/xmlui/handle/123456789/91953.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.<br>Made available in DSpace on 2012-10-24T04:15:31Z (GMT). No. of bitstreams: 1 255191.pdf: 1188227 bytes, checksum: 92d175fe3570f099dae3b72546a6219a (MD5)<br>Nesta tese, dois tipos de sistemas de comunicação sem fio com múltiplas antenas (MIMO - multiple-input multiple-output) e realimentação limitada de canal são considerados. No primeiro tipo, as múltiplas antenas transmissoras estão instaladas em um único transmissor (caso MIMO convencional). Neste caso, propõem-
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VADALA', Valeria. "CHARACTERIZATION AND MODELING OF LOW FREQUENCY DISPERSIVE EFFECTS IN III-V ELECTRON DEVICES." Doctoral thesis, Università degli studi di Ferrara, 2010. http://hdl.handle.net/11392/2389167.

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In this thesis, three years are enclosed of research activity in the topic of non linear characterization and modelling of microwave devices. I investigated various issues related to those topics which are closely related. In fact, to obtain good predictions, empirical models require accurate measurements. This aspect is particularly important when we want to predict the behavior of devices in nonlinear regime. More and more applications take advantage of devices operation in non-linear regime. For such a reason, non linear characterization is an hot topic and research activities have f
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Fernandes, Lorenna Maia. "Mistura de quatro ondas na propagaÃÃo de pulsos Ãpticos ultra-curtos em fibras com dispersÃo decrescente para sistemas WDM." Universidade Federal do CearÃ, 2005. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2033.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>Serà estudado nesta dissertaÃÃo o comportamento da propagaÃÃo de trÃs tipos de pulsos Ãpticos (Solitons, Quasisolitons e Gaussianos) ultracurtos na regiÃo de 1.55&#956;m e a eficiÃncia de conversÃo destes na geraÃÃo de pulsos por meio do fenÃmeno nÃo-linear de mistura de quatro ondas (FWM) em uma fibra comum e em fibras com dispersÃo decrescente em sistemas multiplexados por divisÃo de comprimento de onda (WDM). Para tal usamos seis diferentes perfis de dispersÃo; Constante, Linear, LogarÃtmico, Gaussiano, Exponencial e
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Fernandes, Lorenna Maia. "Mistura de quatro ondas na propagação de pulsos ópticos ultra-curtos em fibras com dispersão decrescente para sistemas WDM." reponame:Repositório Institucional da UFC, 2005. http://www.repositorio.ufc.br/handle/riufc/16112.

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FERNANDES, L. M. Mistura de quatro ondas na propagação de pulsos ópticos ultra-curtos em fibras com dispersão decrescente para sistemas WDM. 2005. 118 f. Dissertação (Mestrado em Engenharia de Teleinformática) – Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2005.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2016-04-04T18:49:33Z No. of bitstreams: 1 2005_dis_lmfernandes.pdf: 9415919 bytes, checksum: 1aae43e85afb43c4ba52d928ae6931cd (MD5)<br>Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2016-04-06T16:58:09Z (GMT) No. of bitstreams: 1 2005_dis_lmfern
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Mendez, Zuñiga Isaac Margarito. "Inestabilidad modulacional inducida en las trampas de dispersion con inversion de signos en optica nolineal." Tesis de Licenciatura, UAEM, 2022. http://hdl.handle.net/20.500.11799/112819.

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Se adjuntan dos archivos o en formato PDF: Tesis mencionada y carta de autorizacion del autor.<br>En esta propuesta de tesis nosotros estudiaremos la inestabilidad modulaciónal que surge en la ecuación no autónoma no lineal de Schrödinger con término de cuarta dispersión. Esta ecuación no es completamente integrable por el método de dispersión inversa . Si una pequeña modulación se aplica a una onda continua de entrada, entonces la inestabilidad modulacional inducida se podrá desarrollar en el modelo.<br>Secretaria de investigación y Estudios Avanzados, UAEM
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Vieira, Afrânio Márcio Corrêa. "Modelagem simultânea de média e dispersão e aplicações na pesquisa agronômica." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-10032009-082556/.

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Diversos delineamentos experimentais que são aplicados correntemente tomam como base experimentos agronômicos. Esses dados experimentais são, geralmente, analisados usando-se modelos que consideram uma variância residual constante (ou homogênea), como pressuposto inicial. Entretanto, esta pressuposição mostra-se relativamente forte quando se está diante de situações para as quais fatores ambientais ou externos exercem considerável influência nas medidas experimentais. Neste trabalho, são estudados modelos para a média e a variância, simultaneamente, com a variância estruturada de duas formas:
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Udo, Margareth C. Toyama. "Melhoria dos estimadores de máxima verossimilhança dos submodelos não-lineares da família exponencial de dispersão." Florianópolis, SC, 2005. http://repositorio.ufsc.br/handle/123456789/102040.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção<br>Made available in DSpace on 2013-07-15T23:53:00Z (GMT). No. of bitstreams: 1 225106.pdf: 836113 bytes, checksum: 19d250c928b76f7a8d6c5380485e5f57 (MD5)<br>Em diversas áreas, particularmente em controle de qualidade, é de interesse modelar não só o parâmetro média, mas também o de dispersão. Um modelo desse tipo auxilia na melhoria contínua dos produtos e processos, sem aumentar os custos de produção. Um aprimoramento de qualidade de um processo industrial é veri
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46

Will, Ricardo de Souza. "Introdução à econometria no Ensino Médio : aplicações da regressão linear." reponame:Repositório Institucional da UFABC, 2016.

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Orientador: Prof. Dr. André Ricardo Oliveira da Fonseca<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Mestrado Profissional em Matemática em Rede Nacional, 2016.<br>Esta dissertação tem como objetivo propor e dar subsídios aos professores de Matemática do 3º ano do ensino médio sobre temas envolvendo Estatística e Economia, tendo como sugestão a Econometria, especificamente a Regressão Linear Simples e Múltipla, em virtude de possuir conceitos muito abrangentes e que permitirá ao aluno desenvolver condições de entender as diversas aplicações e ser cap
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47

Gisch, Debora Lidia. "Uma equação constituinte para a dispersão não-linear de poluentes na camada limite atmosférica turbulenta : fechamento fickiano modificado e a presença de fase." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/131016.

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O fenômeno da dispersão de poluentes precisa ser compreendido e analisado pro- fundamente para que estudos de impactos ambientais possam ser realizados para projetar e prever situações. Então, obter um modelo analítico de dispersão de poluente realista torna- se interessante, pois permite avaliar com maior precisão o impacto ambiental da liberação de poluentes na atmosfera, além de abrir novos horizontes para a pesquisa. A Camada Limite Planetária (CLP) é o domínio de interesse da grande maioria dos modelos, já que nela os fenômenos turbulentos estão presentes. Uma característica destes fenôme
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48

Vega, Guadalupe Segundo Teófilo. "Comportamiento asintótico de la solución global de un sistema dispersivo no lineal de tipo Benjamin-Bona-Mahony." Master's thesis, Pontificia Universidad Católica del Perú, 2012. http://tesis.pucp.edu.pe/repositorio/handle/123456789/4490.

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El objetivo de este trabajo consiste en estudiar el comportamiento asintótico de las soluciones de un sistema dispersivo no lineal de tipo Benjamin-Bona- Mahony cuando t se aproxima al infinito.<br>Tesis
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Zhang, Jiejun. "Photonic Dispersive Delay Line for Broadband Microwave Signal Processing." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35866.

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The development of communications technologies has led to an ever-increasing requirement for a wider bandwidth of microwave signal processing systems. To overcome the inherent electronic speed limitations, photonic techniques have been developed for the processing of ultra-broadband microwave signals. A dispersive delay line (DDL) is able to introduce different time delays to different spectral components, which are used to implement signal processing functions, such as time reversal, time delay, dispersion compensation, Fourier transformation and pulse compression. An electrical DDL is usuall
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Morla, Ricardo Santos. "Comutação de solitões em fibras ópticas não-lineares." Master's thesis, Lisboa : edição do autor, 2001. http://hdl.handle.net/10216/64026.

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