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Dissertations / Theses on the topic 'Oscillating head'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Franc, Tadeáš. "Návrh pendlovací hlavy pro plošné navařování Inconelu 625." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443225.

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This diploma thesis deals with the structural design and production of a oscillating head for surface welding of a protective layer of Inconel® 625 superalloy on membrane walls. The design is preceded by a research for possible variants of the solution. Of the two designs, one was successfully manufactured and assembled, and incentives for future improvements were set. For easy optimization and testing of the device, an oscillating motion program was created in the LinMoT Talk 6.9 software. The production costs for the manufactured equipment were then calculated and the recommended selling pri

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2

Hathaway, Aaron A. Ma Hongbin. "Uneven turns oscillating heat pipes." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6532.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on November 17, 2009). Thesis advisor: Dr. Hongbin Ma. Includes bibliographical references.

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Wilson, Corey A. "Experimental investigation of nanofluid oscillating heat pipes." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4553.

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Thesis (M.S.) University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 29, 2007) Includes bibliographical references.

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4

Cheng, Peng Ma Hongbin. "Theoretial [sic] analysis of oscillating motion, heat transfer, minimum meniscus radius and charging procedure in an oscillating heat pipe." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/6634.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 25, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Hongbin Ma. Vita. Includes bibliographical references.

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5

Pachalla, Seshadri Rajagopal. "Analysis of oscillating flow cooled SMA actuator." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2669.

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Shape Memory Alloys (SMA) are a group of metallic alloys that have the ability to return to some previously defined shape or size when subjected to an appropriate thermal cycling procedure. In recent years there has been a lot of research on the development of small, light and, yet, powerful actuators for use in areas like robotics, prosthetics, biomimetics, shape control and grippers. Many of the miniaturized conventional actuators do not have sufficient power output to be useful and SMAs can be used advantageously here. The widespread use of SMAs in actuators is limited by their low bandwid

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6

Jeong, Eun S. "Heat transfer with oscillating pressure in reciprocating machinery." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13259.

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7

Liang, Shibin. "Theoretical and experimental investigation of oscillating heat pipes." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4560.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 17, 2009) Includes bibliographical references.

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8

Su, Yan. "Numerical simulations on natural convection from a heated oscillating circular cylinder /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?MECH%202003%20SU.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 77-80). Also available in electronic version. Access restricted to campus users.

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9

Amin, Norsarahaida. "Oscillation-induced mean flows and heat transfer." Thesis, University of East Anglia, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329339.

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10

Vincent, Christopher John. "Compact oscillating heat pipe and development of fuzzy copper or wicking structures." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5695.

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Thesis (M.S.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 9, 2009) Includes bibliographical references.

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11

Cheng, Peter D. L. (Peter Dien Leung). "Experiments in heat transfer under conditions of oscillating pressure and flow." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/35458.

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12

Grassmyer, William Alan. "Experiments in heat transfer under conditions of oscillating pressure and flow." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35981.

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13

Rahman, Aevelina. "Characterization of Heat Transfer Enhancement for an Oscillating Flat Plate-Fin." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/98919.

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Heat transfer augmentation is of paramount importance in energy transfer and storage systems and the idea of using the inherent vibrations in a system to enhance heat transfer needs to be thoroughly researched upon. The current study numerically investigates an infinitesimally thin plate-fin undergoing forced oscillations over a range of amplitudes and frequencies in the presence of an approach flow. Reduced frequencies of 0.25 ≤ k ≤16 and plunge amplitudes of 0.03125 ≤ h ≤ 8 are investigated at Re=100 and Pr = 0.71. It is shown that the combined effect of frequency and amplitude on heat trans

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14

Foo, Ser Jee. "Theoretical study of heat distribution and surface temperatures generated in oscillating contact." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-06112009-063051/.

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15

Tziranis, Alexander Konstantinos 1968. "Temperature, heat flux, and velocity measurements in oscillating flows with pressure variations." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12790.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.<br>Vita.<br>Includes bibliographical references (leaves 99-101).<br>by Alexander Konstantinos Tziranis.<br>M.S.

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16

Tørklep, Anders Mathias. "Pressure oscillations during start and stop of a high head Francis turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19323.

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Start and stop procedures affect pressure oscillations throughout a hydropower plant. A desire to study how pressure oscillations behave during these dynamic conditions was the basis of this report. Instrumentation, experimentation and measurement analysis was conducted on a Francis model turbine in the Waterpower Laboratory at NTNU. Eight pressure transducers were calibrated and used during the experiments. Two transducers were installed in the draft tube below the turbine. One was placed in the vaneless space between the guide vanes and the impeller vanes. Three pressure transducers on an im

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17

Stowe, Robert Alan. "Heat transfer from a circular cylinder subject to an oscillating crossflow as in a stirling engine regenerator." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26741.

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An experiment was designed and carried out on the fundamental, but poorly understood problem of oscillating flow past a single, transverse, circular cylinder. This is an approximation of the flow about a single element in a matrix-type regenerator used in Stirling-cycle engines. The experimental rig was designed and built to allow tests to be carried out for the wide range of fluid flow parameters characteristic of various Stirling engines. The influence of these parameters on convective heat transfer rates was measured so the approximate effects of these same parameters on a Stirling engine r

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18

Yoon, Il. "Two-phase flow dynamics by real-time neutron imaging in oscillating heat pipe." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5694.

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Thesis (M.S.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 19, 2009) Includes bibliographical references.

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19

Yeboah, Siegfried Kwame. "An integrated packed bed-oscillating heat pipe system for energy efficient isothermal adsorption processes." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/48342/.

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Energy use in buildings accounts for a large portion of global and regional energy demand and energy-related CO2 emissions. To steer the world towards a low carbon future, the development of new and more efficient technologies is required. In hot and humid climates, the high latent heat loads results in uncomfortable and unhealthy indoor environments, accounting for 30% to 50% of standard air conditioning energy requirements. Physical adsorption of water vapour on solid desiccants is found to offer an energy efficient alternative to conventional dehumidification process using standard air cond

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20

El, Kasmi Amina. "Application de la méthode des ordonnées discrètes au transfert radiatif dans des géométries bidimensionnelles complexes : couplage rayonnement-convection /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1999. http://theses.uqac.ca.

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21

Gurer, Turker. "Numerical Investigation Of Incompressible Flow In Grooved Channels- Heat Transfer Enhancment By Self Sustained Oscillatins." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12604891/index.pdf.

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In this study, forced convection cooling of package of 2-D parallel boards with heat generating chips is investigated. The main objective of this study is to determine the optimal board-to-board spacing to maintain the temperature of the components below the allowable temperature limit and maximize the rate of heat transfer from parallel heat generating boards cooled by forced convection under constant pressure drop across the package. Constant heat flux and constant wall temperature boundary conditions on the chips are applied for laminar and turbulent flows. Finite elements method is used to

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22

Bowers, Earl Clayton. "Investigation of a heat driven thermoacoustic prime mover above onset of self-oscillation." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28310.

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23

Dean, Charles Edwin. "Establishing baseline data for an experimental apparatus that measures heat transfer under conditions of oscillating pressure and flow." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/38726.

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24

Bankim, Subhash Chander [Verfasser], and Surjo [Akademischer Betreuer] Soekadar. "Assessment of whole-head magnetoencephalography during transcranial electric entrainment of brain oscillations / Subhash Chander Bankim ; Betreuer: Surjo Soekadar." Tübingen : Universitätsbibliothek Tübingen, 2018. http://d-nb.info/1168729769/34.

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25

Ahmed, Nisaar. "Thermo-fluid modelling of electrical generator frames under forced convection in an oscillating water column environment." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31363.

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This PhD involved computational fluid dynamic simulations of finned generators cooling under forced convection in an oscillating water column environment. Various design changes to the upstream Wells turbine and its effect on the consequent cooling of the generator were investigated. Simulations were run in steady-state to obtain an initial condition, thereafter, unsteady simulations revealed a steadying of heat transfer over the course of multiple blade rotation cycles. This justified the use of steady-state for the remaining simulations over a range of flow coefficients. The results revealed

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26

Sato, Yuki. "Quantum oscillations and charge-neutral fermions in Kondo insulator YbB₁₂." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263447.

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27

Chaugule, Vishal. "Experimental Investigation of Fluid Dynamics and Heat Transfer Characteristics of a Turbulent Jet Impinging on an Oscillating Target Surface." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/57504.

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This work comprises an experimental study of a turbulent jet impinging on an oscillating target surface. The fluid dynamics and heat transfer characteristics of jet impingement on an oscillating target surface are measured and compared with those of jet impingement on a static target surface. This study shows that target-surface oscillation generates higher turbulence intensities in the impinging-jet flow which give rise to an enhanced heat transfer rate, compared to a static target surface.

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28

Hayes, Benjamin Zed. "Experimental study of the effect of channel orientation and flow oscillations on nucleate boiling heat transfer and the critical heat flux." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1383482001&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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29

Monin, Thomas. "Études de systèmes thermo-fluidiques auto-oscillants pour des applications de récupération d'énergie thermique." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11868.

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Les progrès technologiques considérables menés depuis ces dernières décennies nous permettent aujourd’hui de disséminer dans notre environnement une nuée de noeuds de capteurs communicants combinant la taille micrométrique et la consommation dérisoire caractéristiques des MEMS avec la puissance des protocoles de communications Internet. L’Internet des Objets, formé par ce réseau de capteurs, possède le potentiel d‘optimiser un grand panel d’applications industrielles et domotiques. Le nouveau défi, que la communauté du Energy Harvesting tente de relever depuis une décennie maintenant, e

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30

Lyu, Sixiang. "Theoretical and Experimental Characterizationof a Soft Polymer Heat Exchanger forWastewater Heat Recovery." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280803.

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Wastewater released from showers, sinks, and washers contains a considerable amount of wasteheat that can be recovered by using a heat exchanger. Conventional metal heat exchangers for wastewater heat recovery have common problems of corrosion, fouling and clogging, which makes it necessary to develop a new type of heat exchanger for such low-grade thermalenergy recovery applications. This study deals with a novel patented polymer heat exchanger (WO2020049233A1) made of soft polyurethane tubes that are capable of oscillation once subjected to external forces. Laboratory tests coupled with theo

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31

Tillery, Steven W. "Enhanced boiling heat transfer by submerged, vibration induced jets." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7080.

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In this analysis, the efficacy of cavitation jets for heat transfer enhancement was demonstrated. The cavitation jet was formed from a cluster of cavitation bubbles that are the result of a submerged piezoelectric diaphragms oscillating about a given velocity threshold Two different heaters operating in two different flow environments were examined. For each heater in each environment, the cavitation jet significantly increased the heat transfer

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32

Park, Han G. Gharib Morteza. "A study of heat transport processes in the wake of a stationary and oscillating circular cylinder using digital particle image velocimetry/thermometry /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-04132004-150955.

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33

Fourgeaud, Laura. "Analyse de la dynamique du film liquide dans un caloduc oscillant." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY038/document.

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Nous étudions expérimentalement le comportement d'un film liquide, dit de Landau-Levich, lorsqu'il s'évapore dans une atmosphère constituée uniquement de sa vapeur.La dynamique de ce type de film est un paramètre-clef qui gouverne le fonctionnement des caloducs oscillant (en anglais PHP - Pulsating Heat Pipes). Les PHP sont des liens thermiques de forte conductance. Les recherches récentes leur attribuent un pouvoir de refroidissement très élevé, ce qui les rend particulièrement convoités par l'industrie. Leur géométrie est simple : il s'agit d'un tube capillaire enroulé en plusieurs branches

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34

Meunier, Alexandre. "Contribution théorique et expérimentale à l'étude d’un système magnétocalorique : application au développement d'un prototype industriel de pompe à chaleur." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2031/document.

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Le projet porte sur le développement d'une pompe à chaleur magnétocalorique pour l'entreprise NextPAC. Une étude a été réalisée sur les transferts thermiques se déroulant dans le régénérateur de la pompe. Cette étude a permis de développer un modèle numérique permettant de simuler les échanges thermiques au sein du régénérateur et de développer un démonstrateur afin de pouvoir réaliser des mesures thermiques sur un matériau magnétocalorique échangeant avec un fluide caloporteur en écoulement alterné. De plus, une étude critique et approfondie a été réalisée sur le premier prototype de NextPAC

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35

Saeidi, Seyed Mahdi Khodadadi J. M. "Fluid flow and heat transfer in cavities with inlet and outlet ports effect of flow oscillation and application to design of microvalves /." Auburn, Ala., 2005. http://repo.lib.auburn.edu/Send%208-8-07/SAEIDI_SEYED_37.pdf.

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36

Anderson, Ross William. "Subthreshold Oscillations and Persistent Activity Modulate Spike Output in the Rodent Dentate Gyrus." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1415229722.

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37

Gadiraju, Siddhartha. "Study of Lean Blowout Limits and Effects of Near Blowout Oscillations on Flow Field and Heat Transfer on Gas Turbine Combustor." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/82480.

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Modern gas turbine combustors implement lean premixed (LPM) combustion system to reduce the formation of NOx pollutants. LPM technology has advanced to have the ability to produce extremely low level of NOx emissions. The current focus of research on LPM is focused on reducing the NOx emission to much smaller scales, which is mandated because of the stricter regulations and environmental concerns. However, LPM combustors are susceptible to lean blowout (LBO), and other corresponding instabilities as the combustor is operated lean. Therefore, it is essential to understand the LBO limits and dyn

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38

Varga, Adrienn Gabriella. "The Neural Basis of Head Direction and Spatial Context in the Insect Central Complex." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1487249074487484.

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39

Wang, Xionghui. "Experimental Investigation of Self-Excited Instabilities in Liquid-Fueled Swirl Combustion." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1516361245616083.

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40

Mejia, Daniel. "Effets de la température de paroi sur la réponse de la flamme à des oscillations acoustiques." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0026/document.

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Les instabilités de combustion induites par le couplage combustion-acoustique se produisent dans de nombreux systèmes industriels et domestiques tels que les chaudières, les turbines à gaz et les moteurs de fusée. Ces instabilités se traduisent par des fluctuations de pression et un dégagement de chaleur qui peuvent provoquer une défaillance mécanique ou des dégâts désastreux dans certains cas extrêmes. Ces phénomènes ont été largement étudiés par le passé, et les mécanismes responsables du couplage ont déjà été identifiés. Cependant, il apparaît que la plupart des systèmes se comportent diffé

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41

Cordillet, Sophie. "Modélisation et dimensionnement d'un récepteur solaire pour un système de production de froid par voie thermoacoustique." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00843581.

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Son efficacité, son faible impact environnemental et sa fiabilité font de la réfrigération thermoacoustique solaire une alternative intéressante aux systèmes solaires de production de froid. L'adaptation des technologies solaire et thermoacoustique requiert une conception thermique précise de l'élément d'interface, le récepteur solaire, constitué d'une cavité et d'un échangeur irradié par le rayonnement solaire. L'objectif de cet élément est de collecter et de transmettre efficacement l'énergie solaire incidente au fluide de travail du système thermoacoustique. Comme les ondes acoustiques sont

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Rao, Manoj. "Thermo-hydrodynamics of an extended meniscus as unit-cell approach of pulsating heat pipe." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0080/document.

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Ce travail fait une tentative pour expliquer les oscillations induites thermiquement auto-entretenue d'un système à deux phases constitué d'un liquide-vapeur confinée ménisque isolé (un bouchon de liquide unique attenant à une bulle de vapeur) à l'intérieur d'un tube capillaire circulaire, la longueur du tube être exposé à un gradient de température net, créant ainsi un cycle continu de l'évaporation et la condensation. Ce système représente la simple « unité-cellule" version d'un caloduc oscillant (PHP). La compréhension fondamentale de son comportement de transport menant à oscillations auto

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Oberdorfer, Phillip [Verfasser], Martin [Akademischer Betreuer] Sauter, and Ekkehard [Akademischer Betreuer] Holzbecher. "Heat Transport Phenomena in Shallow Geothermal Boreholes : Development of a Numerical Model and a Novel Extension for the Thermal Response Test Method by Applying Oscillating Excitations / Phillip Oberdorfer. Gutachter: Martin Sauter ; Ekkehard Holzbecher. Betreuer: Martin Sauter." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1047932245/34.

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Zuluaga-Arias, Manuel D. "Spatial and temporal distribution of latent heating in the South Asian monsoon region." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31753.

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Thesis (M. S.)--Earth and Atmospheric Sciences, Georgia Institute of Technology, 2010.<br>Committee Chair: Peter J. Webster; Committee Member: Judith A. Curry; Committee Member: Robert X. Black. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Leão, Hugo Leonardo Souza Lara. "Análise experimental dos efeitos do fluido e da orientação do escoamento no desempenho de dissipadores de calor baseados na ebulição convectiva em microcanais." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-19082014-102054/.

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A pesquisa realizada envolveu a avaliação experimental dos efeitos do fluido e da orientação do escoamento no desempenho de um dissipador de calor baseado na ebulição convectiva em microcanais. Estes dissipadores de calor são usados como uma nova aplicação para a refrigeração dos novos dispositivos eletrônicos que geram altas taxas de calor. Efetuou-se inicialmente uma extensa pesquisa bibliográfica sobre o escoamento monofásico e a ebulição convectiva em microcanais e em multi-microcanais através da qual levantou-se os principais métodos de previsão do coeficiente de transferência de calor e

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Zhou, Limin. "ASSESSING AND MITIGATING AIRBORNE NOISE FROM POWER GENERATION EQUIPMENT." UKnowledge, 2013. http://uknowledge.uky.edu/me_etds/22.

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This dissertation examines the assessment and mitigation of airborne noise from power generation equipment. The first half of the dissertation investigates the diagnosis and treatment of combustion oscillations in boilers. Sound is produced by the flame and is reflected downstream from the combustion chamber. The reflected sound waves perturb the mixture flow or equivalence ratio increasing the heat release pulsations and the accompanying sound produced by the flame. A feedback loop model for determining the likelihood of and diagnosing combustion oscillations was reviewed, enhanced, and then

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Khaled, Abdul Rahim Assaad Mr. "Non-isothermal characterization of squeezed thin films in the presence of biofluids and suspended ultrafine particles." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1071085983.

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48

Barrier, Nicolas. "Variability of the ocean circulation in the North-Atlantic in response to atmospheric weather regimes." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0064/document.

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Le but de cette thèse est d’analyser les impacts de la variabilité atmosphérique grande échelle sur la circulation océanique. Ceci a déjà fait l’objet de nombreuses publications, dans lesquelles la variabilité atmosphérique est analysée en termes de modes de variabilité, déterminés par analyse en composantes principales (EOF en anglais) des anomalies de pression de surface. Ces modes sont l’Oscillation Nord-Atlantic (NAO), le Pattern Est-Atlantique (EAP) et le Pattern Scandinave (SCAN). La décomposition en EOF implique que les modes sont orthogonaux et symétriques. Cette dernière hypothèse a é

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De, la Cruz Sanchez Carmen Mariella. "Utilisation de conduites de séchage oscillantes pour réduire les contraintes liées au retrait du bois." Thesis, Paris, AgroParisTech, 2012. http://www.theses.fr/2012AGPT0068/document.

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Abstract:

La maîtrise du procédé séchage, étape essentielle dans la transformation du bois, est devenue incontournable pour la filière bois. Cette thèse propose l'utilisation de conduites de séchage oscillantes pour réduire les contraintes de séchage liées au retrait par l'activation du fluage mécanosorptif. A ce jour, la meilleure façon d'appliquer les conduites oscillantes représente un défi pour la communauté scientifique. Dans ce travail, nous avons choisi comme matériel d'étude une essence feuillue fortement utilisée dans la filière et très susceptible aux déformations lors du séchage : le hêtre (F

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Gay, Laura. "Processus d'Ornstein-Uhlenbeck et son supremum : quelques résultats théoriques et application au risque climatique." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEC025/document.

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Abstract:

Prévoir et estimer le risque de canicule est un enjeu politique majeur. Évaluer la probabilité d'apparition des canicules et leurs sévérités serait possible en connaissant la température en temps continu. Cependant, les extrêmes journaliers (maxima et minima) sont parfois les seules données disponibles. Pour modéliser la dynamique des températures, il est courant d'utiliser un processus d'Ornstein-Uhlenbeck. Une estimation des paramètres de ce processus n'utilisant que les suprema journaliers observés est proposée. Cette nouvelle approche se base sur une minimisation des moindres carrés faisan

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