Relevant bibliographies by topics / Energy gradients / Dissertations / Theses
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Dissertations / Theses on the topic 'Energy gradients'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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1

Gilstrap, Matthew Coleman. "Renewable electricity from salinity gradients using reverse electrodialysis." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49031.

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Renewable power generation from the controlled mixing of sea and fresh water is relatively unexplored when compared to the development for solar, wind, and other sustainable power alternatives. When global river discharge was taken into account, an estimated 2.6 TW of obtainable energy exists in untapped salinity gradients. Reverse electrodialysis is one proposed power-generating mechanism for harnessing energy from brackish environments and relies on the transport of aqueous salt ions through an apparatus of ion-exchange membranes. In this thesis, operational parameters, including flow direct
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2

Kazemi, Parimah. "A Constructive Method for Finding Critical Point of the Ginzburg-Landau Energy Functional." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9075/.

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In this work I present a constructive method for finding critical points of the Ginzburg-Landau energy functional using the method of Sobolev gradients. I give a description of the construction of the Sobolev gradient and obtain convergence results for continuous steepest descent with this gradient. I study the Ginzburg-Landau functional with magnetic field and the Ginzburg-Landau functional without magnetic field. I then present the numerical results I obtained by using steepest descent with the discretized Sobolev gradient.
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Kazemi, Parimah Neuberger J. W. "A constructive method for finding critical point of the Ginzburg-Landau energy functional." [Denton, Tex.] : University of North Texas, 2008. http://digital.library.unt.edu/permalink/meta-dc-9075.

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4

Rodrigues, Tiago Alexandre Morais. "Tubes reinforced with foams with density gradients." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17994.

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Mestrado em Engenharia Mecânica<br>Estudos na área dos materiais têm desempenhado um importante papel na indústria automóvel. Com o tempo, a utilização de materiais pesados tem vindo a ser substítuido por materiais mais leves como ligas de aço avançados, ligas de alumínio e compósitos. Quanto mais leves forem as estruturas, melhor o seu desempenho em termos de consumo de combustível e emissão de gases. No entanto, as estruturas necessitam de manter a sua integridade, assegurando a segurança activa e passiva dos ocupantes. Sendo assim, este estudo concentra-se em estudar o comportamento
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5

Kulkarni, Anish Niranjan. "Energy and Strength-based Criteria for Intralaminar Crack Growth in Regions with High Stress Gradients." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-87384.

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Cross-ply composite laminates can develop very high density of transverse cracks in the 90-layer under severe thermal and mechanical loading conditions. At such high crack densities, two adjacent cracks start to interact, and a stress gradient is created in the region between these cracks. Due to the presence of high stress gradients, thickness averaging of longitudinal stress becomes obsolete. Thus, a detailed analysis of stress state along the thickness direction becomes necessary to study growth conditions of fiber sized microcracks initiated at the interface between 0-layer and 90-layer. S
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Sullivan, Justine Danielle. "Analysis of energy gradients and sediment loads occurring in the Irish Creek Watershed located in northeast Kansas." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16908.

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Master of Science<br>Department of Biological and Agricultural Engineering<br>Philip Barnes<br>Sediment is a large pollutant concern for the United States and is a major impairment source in water bodies (MARC 2013). Rivers and streams assessed in Kansas resulted in 87.8% being considered impaired, as well as 97.8% of the assessed lakes, reservoirs, and ponds (EPA 2012d). Tuttle Creek Reservoir is filling with sediment faster than any other federal reservoir in the region. Due to the importance of Tuttle Creek Reservoir, limiting the water impairments has been made a priority. The tributaries
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7

Kolacz, Jakub. "Energy Minimization in Nematic Liquid Crystal Systems Driven by Geometric Confinement and Temperature Gradients with Applications in Colloidal Systems." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448898699.

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8

Oh, Yoontaek. "Effects of Electrochemical Reactions on Sustainable Power Generation from Salinity Gradients using Capacitive Reverse Electrodialysis." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin161375277977973.

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9

Merz, Clifford Ronald. "Investigation and evaluation of a bi-polar membrane based seawater concentration cell and its suitability as a low power energy source for energy harvesting/MEMS devices." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002671.

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10

Dornbach, Mark [Verfasser], and Hans-Joachim [Akademischer Betreuer] Werner. "Analytical energy gradients for open-shell local second-order Møller-Plesset perturbation theory and applications to large molecules / Mark Dornbach ; Betreuer: Hans-Joachim Werner." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1166141381/34.

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11

Peres, Luciano Donizeti Pantano [UNESP]. "Avaliação de propriedades mecânicas de peças pré-moldadas submetidas à cura térmica pelo método da maturidade: estudo de caso." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/94559.

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Made available in DSpace on 2014-06-11T19:27:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-04-26Bitstream added on 2014-06-13T20:55:56Z : No. of bitstreams: 1 peres_ldp_me_ilha.pdf: 2857785 bytes, checksum: b65c61234cf2091abda94892d39a8f54 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O Método da Maturidade é um ensaio não-destrutivo utilizado para avaliação das propriedades do concreto que estejam relacionadas ao desenvolvimento do grau de hidratação do material, a partir do seu histórico de temperaturas. O presente trabalho apresenta a aplicação dos
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Peres, Luciano Donizeti Pantano. "Avaliação de propriedades mecânicas de peças pré-moldadas submetidas à cura térmica pelo método da maturidade : estudo de caso /." Ilha Solteira : [s.n.], 2006. http://hdl.handle.net/11449/94559.

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Resumo: O Método da Maturidade é um ensaio não-destrutivo utilizado para avaliação das propriedades do concreto que estejam relacionadas ao desenvolvimento do grau de hidratação do material, a partir do seu histórico de temperaturas. O presente trabalho apresenta a aplicação dos conceitos do Método da Maturidade para analisar o desenvolvimento da resistência à compressão de elementos pré-moldados de concreto submetidos à cura térmica, a partir do monitoramento dos dados de tempo e temperatura junto à empresa Protendit, em São José do Rio Preto - SP, assim como a realização de ciclos térmicos n
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13

Pajot, Ségolène. "Synthèse et caractérisation d’oxydes lamellaires riches en lithium et en manganèse obtenus sous la forme de gradients de concentration pour les batteries Li-ion." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0277/document.

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Ce travail présente la mise en oeuvre d’un protocole de synthèse de gradients deconcentration dans les oxydes lamellaires riches en Li et en Mn. Le but a été dedévelopper la formation d’oxydes lamellaires riches en Li et Mn au coeur des agrégatssphériques du matériau actif et, en se rapprochant de la surface, d’enrichir lacomposition de l’oxyde lamellaire en Co et en Ni, afin de combiner une forte densitéd’énergie (apportée par le coeur du gradient) et une excellente stabilité thermique etstructurale (apportée par la surface du gradient). La synthèse a été réalisée en deuxétapes, une co-précip
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14

Capponi, Francesco. "Renormalized energy momentum tensor from the Gradient Flow." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/8598.

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Strongly coupled systems are elusive and not suitable to be described by conventional perturbative approaches. However, they are ubiquitous in nature, especially in particle physics. The lattice formulation of quantum field theories provided a unique framework in which the physical content of these systems could be precisely determined. Combined with numerical techniques, the lattice formalism allowed to precisely determined physical quantities describing the thermodynamics, as well as the spectroscopy of strongly interacting theories. In this work, the lattice formulation has been employed to
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15

Valverde, Danillo Pires. "Estudo teórico de ácidos aminobenzóicos usando técnicas de mecânica quântica e simulação computacional." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/5557.

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Submitted by Cláudia Bueno (claudiamoura18@gmail.com) on 2016-05-12T17:45:14Z No. of bitstreams: 2 Dissertação - Danillo Pires Valverde - 2016: 5970913 bytes, checksum: db2323393b3cc67f95df905f6a4600e9 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-05-13T11:02:15Z (GMT) No. of bitstreams: 2 Dissertação - Danillo Pires Valverde - 2016: 5970913 bytes, checksum: db2323393b3cc67f95df905f6a4600e9 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Mad
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Al-Saleh, N. "A salt gradient solar pond for heat collection and long term storage." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375133.

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A salt gradient solar pond offers an economical means of both collecting summer solar heat, and storing it in water over periods of a few months for use in winter space heating. The vertical gradient of salt density prevents convection in the pond and makes it self-insulating against heat losses. The solar pond project at the university of Sussex aimed to study the design, construction, filling, and operation of a salt gradient solar pond, and to develop inexpensive instrumentation for the harsh environment of hot salt water solution, for monitoring behaviour and performance. A new method of h
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17

Silva, Carlos Eduardo Bistafa da. "Estudos teóricos do estado excitado de moléculas orgânicas em solvente." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-22102015-102635/.

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Absorção e Emissão de radiação eletromagnética por moléculas na região do UV-Vis fornece informações sobre os estados eletrônicos excitados, sendo propriedades de grande interesse devido a sua relação com processos biológicos, bem como suas possíveis aplicações em diagnósticos e tecnologia. Essas propriedades são sensíveis ao meio em que as moléculas se encontram, tornando-se assim natural a busca por métodos teóricos que possibilitam descrever essas interações. Neste trabalho, nós usamos a metodologia Sequential-Quantum Mechanics/Molecular Mechanics para estudar o espectro de absorção e de e
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18

Hong, Jin Gi. "Development of process-based model and novel nanocomposite cation exchange membranes for salinity gradient power production." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53530.

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Ocean salinity is a renewable energy source that has not been recognized and could provide an opportunity to capture significant amount of clean energy when it mixes with river water. One of the processes emerging as a sustainable method for capturing energy from seawater is reverse electrodialysis (RED), which generates power via the transport of the positive and negative ions in the water through selective ion exchange membranes (IEMs). RED power generation is relatively close to commercialization, but its application is often limited by system power efficiency in natural water conditions. A
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19

Andersen, Even. "Multiple Holdup Solutions and the Effect of Interface Level Gradients." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18808.

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Simulations on liquid loads and flow rates which the Taitel-Dukler model predicts to have multiple solutions have been performed with ANSYS Fluent and LedaFlow. Both steady state and transient results in one, two and three dimensional flows are reported in this work. The hypothesis that the holdup of a pipe operated in the multiple solution region will be determined by the downstream holdup is investigated. Some results indicate that the hypothesized interface level gradients effects are correct.The Fluent steady state simulations had mass imbalance issues in addition to being both grid and ge
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20

Almeida, Eduardo de. "Determinação de metais na bacia do rio Piracicaba usando as técnicas de Difusão em Filmes Finos por Gradiente de Concentração (DGT) e Fluorescência de Raios X Dispersiva em Energia (EDXRF) e por Reflexão Total (TXRF)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/64/64135/tde-27022012-112202/.

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O desenvolvimento e aplicação de métodos analíticos na avaliação das concentrações de metais nas frações dissolvida e lábil na bacia do rio Piracicaba são de relevante importância para o estudo do comportamento químico-ambiental desses metais e para seu monitoramento, devido ao impacto das atividades antropogênicas nessa bacia. A técnica de difusão em filmes finos por gradiente de concentração (DGT, do inglês diffusive gradients in thin-films), é uma promissora ferramenta analítica de amostragem, pois permite pré-concentração, análise temporal, remoção de interferentes, avaliação lábil e amost
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21

Herrera, Andrés Medina. "Estrutura eletrônica da amino- e dimetilamino-benzonitrila em meio usando métodos híbridos de QM/MM." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5123.

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Submitted by Cláudia Bueno (claudiamoura18@gmail.com) on 2016-01-15T17:20:21Z No. of bitstreams: 2 Dissertação - Andrés Medina Herrera - 2015.pdf: 11967625 bytes, checksum: 5b7e3f00af20766f822172f92649bc98 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-01-18T09:13:56Z (GMT) No. of bitstreams: 2 Dissertação - Andrés Medina Herrera - 2015.pdf: 11967625 bytes, checksum: 5b7e3f00af20766f822172f92649bc98 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5
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Takasaki, Kevin T. (Keven Takao). "Investigation of electron temperature gradient driven micro-reconnecting modes in toroidal high-energy plasmas." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40924.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.<br>Includes bibliographical references (p. 43).<br>Experiments carried out with magnetically confined, high temperature plasmas have revealed important effects that have yet to be justified by existing theory. In particular, there arises an anomalous particle inflow in the central region of the plasma column. Experimental evidence suggests that this particle transport results from the excitation of unstable, short wavelength modes driven by the electron temperature gradient, but the validity of the existing theory is
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Maciel, Renan de Paula 1984. "Maximização da potência característica de linhas de transmissão usando método de otimização não linear." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259598.

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Orientador: Maria Cristina Dias Tavares<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-25T10:45:44Z (GMT). No. of bitstreams: 1 Maciel_RenandePaula_M.pdf: 20862313 bytes, checksum: 8d33d7f791ddf8189e35795948116d81 (MD5) Previous issue date: 2013<br>Resumo: Neste trabalho é proposto um método de otimização para maximizar a potência característica de linhas de transmissão constituída por condutores em feixe. O método iterativo, baseado na minimização pelo gradiente, altera, a cada passo, a p
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Salgado, Roberto de Souza. "Optimal power flow solutions using the gradient projection method." reponame:Repositório Institucional da UFSC, 1989. http://repositorio.ufsc.br/xmlui/handle/123456789/75577.

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25

Shahdi, Arya. "Physics-guided Machine Learning Approaches for Applications in Geothermal Energy Prediction." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103603.

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In the area of geothermal energy mapping, scientists have used physics-based models and bottom-hole temperature measurements from oil and gas wells to generate heat flow and temperature-at-depth maps. Given the uncertainties and simplifying assumptions associated with the current state of physics-based models used in this field, this thesis explores an alternate approach for locating geothermally active regions using machine learning methods coupled with physics knowledge of geothermal energy problems, in the emerging field of physics-guided machine learning. There are two primary contribution
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Yi, Kaijun. "Controlling guided elastic waves using adaptive gradient-index structures." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC044/document.

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Les matériaux à gradient d'indice de réfraction (GRIN) présentent des propriétés mécaniques variant en temps ou/et en espace. Ils ont été testés pour des applications prometteuses dans de nombreuses applications d'ingénierie, comme pour le contrôle santé structurale ou la surveillance de structure (SHM), le contrôle des vibrations et bruit, la récupération d'énergie, etc. D'un autre côté, les matériaux piézoélectriques offrent la possibilité de réaliser des cellules composites dont les propriétés mécaniques peuvent être contrôlées en ligne. Motivé par ces deux approches, cette thèse étudie la
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Guevenoux, Camille. "Réparation de pièces métalliques par Directed Energy Deposition : gradient microstructural, comportement mécanique et tenue en fatigue." Thesis, Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAX006.

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Le Directed Energy Deposition (DED) est un procédé de fabrication additive utilisant une buse constituée d’un faisceau laser et d’un jet de poudre coaxiaux. Le laser crée un bain liquide dans lequel la poudre est projetée, elle fond puis se solidifie formant un cordon de matière lorsque la buse se déplace. Ce procédé présente en particulier un fort potentiel pour réparer des pièces métalliques à haute valeur ajoutée. Néanmoins, le faible diamètre et les mouvements rapides du faisceau laser entraînent des gradients thermiques et des vitesses de refroidissement élevés et cette évolution thermiqu
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28

Stanley, Andrew P. J. "Gradient-Based Layout Optimization of Large Wind Farms: Coupled Turbine Design, Variable Reduction, and Fatigue Constraints." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8692.

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Wind farm layout optimization can greatly improve wind farm performance. However, past wind farm design has been limited in several ways. Wind farm design usually assumes that all the turbines throughout the farm should be exactly the same. Oftentimes, the location of every turbine is optimized individually, which is computationally expensive. Furthermore, designers fail to consider turbine loads during layout optimization. This dissertation presents four studies which provide partial solutions to these limitations and greatly improve wind farm layout optimization. Two studies explore differin
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Alcaraz, Segura Aurora. "Enhancing the thermal efficiency of a salinity gradient solar pond. Implementation of the study in the design, construction, salinity gradient establishment, operation and energy transfer at industrial scale." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/666185.

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The energy model in the last decades has been dominated by the consumption of fossil fuels assuming a high environmental cost. Global warming and the destruction of the ozone layer are two examples of the deterioration that is being suffered due to the use of these energy sources. Increasingly, the use of renewable energy one of the alternatives in building a sustainable economic model. Among renewables, solar energy is presented as an inexhaustible and accessible source of energy. The solar pond is a technology that meets all requirements to be considered an energy storage device. It can stor
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Liu, Yinxiao. "A new method of threshold and gradient optimization using class uncertainty theory and its quantitative analysis." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/249.

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The knowledge of thresholding and gradient at different tissue interfaces is of paramount interest in image segmentation and other imaging methods and applications. Most thresholding and gradient selection methods primarily focus on image histograms and therefore, fail to harness the information generated by intensity patterns in an image. We present a new thresholding and gradient optimization method which accounts for spatial arrangement of intensities forming different objects in an image. Specifically, we recognize object class uncertainty, a histogram-based feature, and formulate an energ
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Manikonda, Nikhil. "Performance of Deep Geothermal Energy Systems." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23219.

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Geothermal energy is an important source of clean and renewable energy. This project deals with the study of deep geothermal power plants for the generation of electricity. The design involves the extraction of heat from the Earth and its conversion into electricity. This is performed by allowing fluid deep into the Earth where it gets heated due to the surrounding rock. The fluid gets vaporized and returns to the surface in a heat pipe. Finally, the energy of the fluid is converted into electricity using turbine or organic rankine cycle (ORC). The main feature of the system is the employment
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32

Alberti, Paolo. "Circuiti per la conversione di micro potenze da gradienti termici ambientali." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3568/.

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In questa tesi vengono analizzati alcuni schemi circuitali di convertitori di micro potenze da generatori termoelettrici sottoposti a gradienti di temperatura limitati. I circuiti, basati su oscillatori step-up in grado di innescarsi con tensioni di alimentazione estremamente basse, sono stati analizzati dal punto di vista teorico e mediante successive simulazioni circuitali. Le potenze ottenibili con gradienti di temperatura inferiori a 10K risultano tipicamente comprese tra qualche uW e qualche decina di uW, con efficienze fino a circa il 40%.
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Afeef, M. "Salt gradient solar ponds and desalination with particular reference to the absorbtion of solar radiation in salt solutions, and application in Saudi Arabia." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370352.

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34

Patharlapati, Sai Ram Charan. "Balancing of Network Energy using Observer Approach." Master's thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-209453.

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Efficient energy use is primarily for any sensor networks to function for a longer time period. There have been many efficient schemes with various progress levels proposed by many researchers. Yet, there still more improvements are needed. This thesis is an attempt to make wireless sensor networks with further efficient on energy usage in the network with respect to rate of delivery of the messages. In sensor network architecture radio, sensing and actuators have influence over the power consumption in the entire network. While listening as well as transmitting, energy is consumed by the radi
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Prahs, Andreas [Verfasser], Thomas [Akademischer Betreuer] Böhlke, Bob [Akademischer Betreuer] Svendsen, and Erica [Akademischer Betreuer] Lilleodden. "A Gradient Crystal Plasticity Theory Based on an Extended Energy Balance / Andreas Prahs ; Thomas Böhlke, Bob Svendsen, Erica Lilleodden." Karlsruhe : KIT Scientific Publishing, 2020. http://d-nb.info/1216997276/34.

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Koczor-Benda, Zsuzsanna [Verfasser], and Thomas-Christian [Akademischer Betreuer] Jagau. "Analytic gradient techniques for investigating the complex-valued potential energy surfaces of electronic resonances / Zsuzsanna Koczor-Benda ; Betreuer: Thomas-Christian Jagau." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1180981936/34.

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Pereira, Adriano José. "Gradientes de oxigênio, glicose, dióxido de carbono e lactato em diferentes compartimentos vasculares." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5152/tde-27102011-160323/.

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INTRODUÇÃO: Apesar do amplo uso da medida da saturação central de oxigênio como meta terapêutica em pacientes de terapia intensiva, diferenças absolutas em relação à saturação venosa mista existem. As causas desses gradientes, bem como o comportamento das mesmas ao longo do tempo nas doenças graves não foram completamente esclarecidas. Considerando que a maioria das intervenções atualmente empregadas para reverter desequilíbrios de oxigenação tecidual presentes nos pacientes graves é direcionada, direta ou indiretamente, ao coração; a situação particular de elevada taxa de extração de oxigênio
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Dimitrijević, Bojan J. [Verfasser], Klaus [Gutachter] Hackl, and Paul [Gutachter] Steinmann. "On a regularization framework for inelastic material models via gradient enhancement of the free energy function / Bojan J. Dimitrijević ; Gutachter: Klaus Hackl, Paul Steinmann." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1129452247/34.

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Zhu, Guang. "Wave propagation analysis in complex medium based on second strain gradient theory." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEC045.

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Dans ce travail, deux modèles enrichis décrivant respectivement un mouvement longitudinal non classique dans des tiges et un mouvement de flexion et de cisaillement non classique dans des poutres sont établis basés sur la théorie du second gradient de contrainte de Mindlin. Ce dernier peut décrire l’hétérogénéité provoquée par les interactions micro-structure dans le cadre de la mécanique des milieux continus. La modélisation multi-échelle commence par exprimer l'énergie de déformation, l'énergie cinétique et le travail virtuel effectué par des forces externes basés sur la théorie SSG. Les équ
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Da, Sié Sylvestre [Verfasser]. "Spatial patterns of West-African plant diversity along a climatic gradient from coast to Sahel / Sié Sylvestre Da." Bonn : Universitäts- und Landesbibliothek Bonn, 2010. http://d-nb.info/1016023081/34.

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Bartling, Karsten. "Apoferritin Crystallization in relation to Eye Cataract." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14111.

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Protein crystallization is significant in both biotechnology and biomedical applications. In biotechnology, crystallization is essential for determining the structure of both native and synthesized therapeutically important proteins. It can also be used as a final purification step and as a stable form for protein storage. With regard to biomedical systems, protein crystallization appears to be involved in the development and manifestation of certain human diseases. In particular, there exists evidence that L-rich ferritin crystals are involved in Hereditary Hyperferritinemia Cataract Synd
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Cornelius, Christine Verfasser], Annette [Akademischer Betreuer] Menzel, Wolfgang W. [Akademischer Betreuer] [Weisser, and Harald [Akademischer Betreuer] Albrecht. "Monitoring and analysis of plant phenological responses in manipulative experiments and along natural gradients / Christine Cornelius. Gutachter: Wolfgang W. Weisser ; Annette Menzel ; Harald Albrecht. Betreuer: Annette Menzel." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1031515054/34.

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43

Ma, Zepeng. "Fatigue models for life prediction of structures under multiaxial loading with variation in time and space." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX117/document.

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L'objet de ce travail est de proposer une approche multi-échelle de la fatigue fondée sur l'énergie, et susceptible d'estimer les durées de vie associées à des chargements multidimensionnels variables. Le fondement de la démarche consiste à supposer que l'énergie dissipée à petite échelle régit le comportement à la fatigue. À chaque point matériel, est associée une distribution stochastique de points faibles qui sont susceptibles de plastifier et de contribuer à la dissipation d'énergie sans affecter des contraintes macroscopiques globales. Ceci revient à adopter le paradigme de Dang Van en fa
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Alvarez, Boto Roberto. "Development of the NCI method : high performance optimization and visualization." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066220/document.

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Les interactions non-covalentes ont une importance fondamental pour la chimique. Les interactions entre un catalyseur et le substrat, interactions entre matériaux, synthèse des enantiomers parmi autres réactions chimiques sont décrivent par interactions non-covalentes. Elles sont fondamental pour designer nouveaux matériaux. Les interactions non-covalents sont très suivant visualisées à partir de mesures de contactes atomiques qui utilisent des donnes de rayon de van de Waals. Cette type d'approximations ne sont pas très flexible pour comprendre l'interaction avec l'environnement. Aujourd'hui
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Aviat, Félix. "Development of High Performance Molecular Dynamics : Fast Evaluation of Polarization Forces The truncated conjugate gradient (TCG), a non-iterative/fixed-cost strategy for computing polarization in molecular dynamics: Fast evaluation of analytical forces Truncated Conjugate Gradient: An Optimal Strategy for the Analytical Evaluation of the Many-Body Polarization Energy and Forces in Molecular Simulations". Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS498.

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La dynamique moléculaire classique est un outil précieux pour explorer le monde de l’infiniment petit, notamment lorsque l’on parle de systèmes biologiques (protéines). Ces simulations sont basées sur des modèles plus ou moins avancés, où la prise en compte des électrons n’est pas évidente. La polarisabilité permet la prise en compte de la mobilité des nuages électronique tout en conservant un cadre classique. Elle peut-être décrite par des dipôles induits, dont le calcul demande la résolution d’un schéma auto-cohérent (SCF), coûteux en terme de temps de calcul et source d’instabilité. Dans ce
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AZEGAMI, Hideyuki, Taiki AOYAMA, Yuri NAKAMURA, 秀幸 畔上, 大樹 青山 та 有里 中村. "音場構造連成系における放射音圧を最大化する構造の形状最適化". 一般社団法人日本機械学会, 2008. http://hdl.handle.net/2237/21118.

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Schober, Benjamin. "Membrane Stratified Solar Ponds." Thesis, University of Gävle, Faculty of Engineering and Sustainable Development, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-7083.

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<p>This project deals with the potential of membrane stratified solar ponds which consist of two water layers, where one is a salt solution here, and a separating translucent membrane. An experimental pond was set up to study the thermal behaviour of such collector systems. The input is mainly solar radiation, sometimes when the ambient temperatures are higher than the pond temperatures also heat from the environment is transferred into the pond.</p><p>The measured temperatures of the pond, the ambient temperature, the global radiation and wind speed were the basis data for thermal calculation
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Pabbu, Akhil Sai. "Incorporating Passive Compliance for Reduced Motor Loading During Legged Walking." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1501950536554588.

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Lécuyer, Vincent. "Étude analytique et numérique de problèmes oscillants en calcul des variations." Metz, 2000. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2000/Lecuyer.Vincent.SMZ0044.pdf.

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Après un exposé succinct de la gémellation de phases dans certains cristaux, la modélisation de ce phénomène physique conduit à un problème variationnel de minimisation d'énergie potentielle à puits incompatibles. Ce type de problèmes résiste souvent à l'analyse. Un logiciel spécifique d'exploitation intéractive des suites minimisantes est développé et présenté, ainsi que ces résultats numériques faisant apparaître des structures oscillantes à échelles multiples, confirmant certaines observations directes au microscope électronique (tweed)<br>After a short exposition of the phase twinning in s
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Carvalho, Esdras Penedo de. "Lagrangeana aumentada e barreira combinadas com o metodo do gradiente reduzido na solução do fluxo de potencia otimo." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260329.

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Orientador : Anesio dos Santos Junior<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-03T23:25:26Z (GMT). No. of bitstreams: 1 Carvalho_EsdrasPenedode_D.pdf: 1776464 bytes, checksum: 0190f59fa01ca49b0518113d289152c6 (MD5) Previous issue date: 2004<br>Doutorado<br>Automação<br>Doutor em Engenharia Elétrica
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