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Thèses sur le sujet « Wave reflections »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Dickson, William S. "Wave reflections from breakwaters." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283483.

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Thesis (M.S. in (Meteorology and Physical Oceanography)) Naval Postgraduate School, June 1994.<br>Thesis advisor(s): Thomas H. C. Herbers, Edward B. Thornton. "June 1994." Bibliography: p. 37. Also available online.

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2

Karenowska, Alexy Davison. "Some magnetic reflections on wave dynamics." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:d31bd222-a948-45f8-9617-40507f4f96c6.

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3

Karimi, Hussain H. (Hussain Habibullah). "Oblique reflections of internal gravity wave beams." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74673.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 99-100).<br>We study nonlinear effects in reflections of internal gravity wave beams in a continuously stratified liquid which are incident upon a uniform slope at an oblique angle. Wave motion in a stratified fluid medium is unique in the sense that the

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4

Birtel, Philip [Verfasser]. "Inclusion of Multi-Reflections in the Beam-Wave Interaction Simulation of Traveling Wave Tubes / Philip Birtel." München : Verlag Dr. Hut, 2011. http://d-nb.info/1013526538/34.

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5

Papandreou, Benjamin David. "On the detection of shallow buried objects using seismic wave reflections." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/334160/.

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This thesis is concerned with a methodology for the detection of shallow (of order 1 metre) objects buried in soil using seismic waves. Possible objects of interest include infrastructure, archaeological artefacts and ordinance. A mathematical analysis of an idealised system is performed to gain understanding of both seismic wave propagation and the generation of these waves by surface sources. The mathematical techniques used in the existing analysis of a point vertical source are applied to the desired problem of a point horizontal surface traction. Results are displayed in a graphically con

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6

BATTAGLIA, ENZO. "Seismic reflection imaging of near surface structures using the Common Reflection Surface (CRS) Stack Method." Doctoral thesis, Università degli Studi di Cagliari, 2014. http://hdl.handle.net/11584/266406.

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This PhD thesis aims to evaluate whether the Common-Refl ection-Surface (CRS) stack method can be considered as a more cost efficient processing alternative to the conventionally used Common Midpoint (CMP) stack method for processing of shallow and ultrashallow reflection data. The CRS stack is a seismic imaging method established for oil and gas exploration that is similar in concept to the conventional CMP stack method. Unlike the CMP stack, the CRS stack process is not confined to single CMP gathers (offset direction), but also includes neighbouring CMPs (midpoint direction) into the s

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7

Zhu, Xiang 1970. "3-D numerical modeling of the P and SV wave reflections from fractured reservoirs." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/58162.

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8

Day, Elizabeth Anne. "Array studies of short period P-wave reflections from boundaries within the deep Earth." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610226.

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9

Aloi, Daniel Nicholas. "Development and verification of a mathematical model to investigate the effects of earth-surface-based multipath reflections at a differential global positioning system ground reference site." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175264170.

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10

Atef, Ali Hadi Mr. "ANALYSES OF URSEIS MOHO REFLECTIONS BENEATH THE PREURALIAN FOREDEEP OF THE URAL MOUNTAINS, RUSSIA." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1181569948.

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11

Neto, Celso de Carvalho Noronha. "Matriz de massa de ordem elevada, dispersão de velocidades e reflexões espúrias." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-23092008-091215/.

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O assunto principal deste trabalho é qualificar, quantificar e implementar o comportamento numérico de estruturas discretizadas através do método dos elementos finitos. Serão abordados apenas os elementos lineares unidimensionais dinâmicos, porém a aplicabilidade da formulação proposta pode se estender para elementos bi e tridimensionais lineares dinâmicos. Inicia-se com uma introdução ao tema. Com certo desenvolvimento matemático, pode-se isolar analiticamente a parcela relacionada ao erro numérico. Elevando a ordem do erro de truncamento, obtém-se precisão elevada na resposta numérica. Inspi

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12

Srikasem, Suthum. "Wave reflection in uniaxially anisotropic media." Ohio : Ohio University, 1987. http://www.ohiolink.edu/etd/view.cgi?ohiou1183062033.

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13

Chen, Yu. "Spherical wave reflection and transmission." Thesis, Open University, 1991. http://oro.open.ac.uk/57346/.

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This study is concerned with the reflection and transmission of spherical waves at a plane interface between two different media. The phenomenon of the reflection and transmission of spherical waves has been studied by means of analytical methods, numerical computation, and experimental tests. A new integral representation for a spherical wave is obtained by transforming Lamb/Sommerfeld's integral representation. The new integral has no singularity so it allows more accurate numerical integration. A new proof of Lamb/Sommerfeld's integral representation for a spherical wave is presented based

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14

Liu, Faqi. "Surface multiple attenuation operators in the plane wave domain : theory and applications /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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15

Azam, Md Ali. "Wave reflection from a lossy uniaxial media." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179854582.

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16

Jackson, Ruth P. "PIN diodes : Requirements for millimetre-wave reflection." Thesis, Queen's University Belfast, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534723.

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17

Grooth, Pieter Jan. "Wave reflection by a flat plate cascade." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/42459.

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18

Helfrich, L. Cody. "Estimating oceanic internal wave energy from seismic reflector slope spectra." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1594476671&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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19

Watson, David H. "Wave Reflection on a Two-Slope Steep Beach." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/6884.

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Wave reflection of sea-swell (0.050.20 Hz) energy on a two-slope (1/7.6 nearshore and 1/19 offshore) steep beach with no subaqueous sandbar is studied. The dataset were collected using a cross-shore array of 4 Acoustic Doppler Current Profilers measuring velocity and pressure at 1 Hz continuously for 40 days. Measurement of pressure and velocity at the same location allows data to be decomposed into onshore and offshore components to determine reflection. The long data set captured a wide range of wave conditions at various tidal stages. Observations show low amplitude long period waves produc

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20

Lee, Seung-Kyu. "Wave reflection, transmission and propagation in structural waveguides." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430485.

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21

Cao, Jun. "Toward a wave-equation based true-reflection imaging /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2008. http://uclibs.org/PID/11984.

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22

Guy, Erich D. "Analysis and modeling of high-resolution multicomponent seismic refelction data." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1044983175.

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23

Barnes, Crispin Henry William. "Reflection of waves from disordered media." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47763.

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24

Appelö, Daniel. "Non-reflecting Boundary Conditions for Wave Propagation Problems." Licentiate thesis, KTH, Numerical Analysis and Computer Science, NADA, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1664.

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<p>We consider two aspects of non-reflecting boundaryconditions for wave propagation problems. First we evaluate aproposed Perfectly Matched Layer (PML) method for thesimulation of advective acoustics. It is shown that theproposed PML becomes unstable for a certain combination ofparameters. A stabilizing procedure is proposed andimplemented. By numerical experiments the performance of thePML for a problem with nonuniform flow is investigated. Furtherthe performance for different types of waves, vorticity andsound waves, are investigated.</p><p>The second aspect concerns spurious waves, which a

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25

Seaman, Roy C. "Beach response in front of wave-reflecting structures." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU105978.

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Several studies have previously demonstrated that sediment transported as bed load under a standing wave will be moved from between node and antinode towards the node where it accumulates. The end result is the generation of areas of scour in the bed between node and antinode and areas of sediment accretion around the node. However, these studies have failed to provide an adequate description of the mechanisms which led to this so-called "N-type" response. Consequently it has been the purpose of this study to examine the phenomenon of N-type beach response in some detail. As a first step an ex

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26

Uhrig, Matthias Pascal. "Numerical simulation of nonlinear Rayleigh wave beams evaluating diffraction, attenuation and reflection effects in non-contact measurements." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54368.

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Although several studies have proven the accuracy of using a non-contact, air-coupled receiver in nonlinear ultrasonic (NLU) Rayleigh wave measurements, inconsistent results have been observed when working with narrow specimens. The objectives of this research are first, to develop a 3D numerical finite element (FE) model which predicts nonlinear ultrasonic measurements and second, to apply the validated model on the narrow waveguide to determine causes of the previously observed experimental issues. The commercial FE-solver ABAQUS is used to perform these simulations. Constitutive law and e

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27

Teh, Hee Min. "Hydrodynamic performance of free surface semicircular breakwaters." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7652.

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Different types of breakwaters have been developed in the past for the protection of valuable coastal property, commercial activity and beach morphology. Among these, gravity-type breakwaters are the most common and provide good surface wave attenuation. However, these breakwaters are not always suitable due to their adverse impact on the coastal environment. To alleviate the problem, free surface breakwaters with a variety of caisson designs have been proposed and developed. The main advantages of such breakwaters are low capital cost, freedom from silting and scouring, short construction per

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28

Liu, Yan-Qiang. "Analysis of P-wave seismic reflection data for azimuthal anisotrophy." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/12444.

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29

Linton, C. M. "Wave reflection by submerged bodies in water of finite depth." Thesis, University of Bristol, 1988. http://hdl.handle.net/1983/4f92efdb-190a-4c58-bd4d-6906362c5883.

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30

Petzer, J. M. "A study of water wave reflection using close range photogrammetry." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/18789.

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The intention of this investigation is to investigate the various forms of water wave reflection to a high degree of accuracy. Close range photogrammetry is the technique that is used to measure the water surface profile, as it produces an accurate and comprehensive analysis of the water surface profiles. Conventional photogrammetry techniques (photography) were used in preference to near real time photogrammetry (digital). Although near real time photogrammetry has the advantage of a far higher rate of data acquisition, it does not achieve the same degree of accuracy as can be achieved by con

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31

Hinis, Mehmet Ali Weggel J. Richard. "Cnoidal and sinusoidal wave reflection from a laboratory sand beach /." Philadelphia : Drexel University, 2003. http://dspace.library.drexel.edu/handle/1721.1/100.

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32

Gongora, Orozco Nalleli. "Experimental studies on internal shock wave phenomena and interactions." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/experimental-studies-on-internal-shock-wave-phenomena-and-interactions(6325f185-76a1-483a-9d14-606a6a48374e).html.

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Unsteady shock waves are formed by the coalescence of pressure waves. The attenuationof pressure and shock waves in general is of great importance in a wide varietyof application such as vehicle performance, health and safety. Previous researcheshave been carried out on a variety of geometries to understand the physics. Theaim of this project is to advance the previous-state-of-the-art and to shed furtherlight into the fundamental physics associated with the shock wave interactions andphenomena. Shock wave attenuation was studied by using rough walls in a three-pipe system. The roughness at th

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33

Xie, Jishi. "Acoustic reflection from temperature microstructure." Thesis, The University of Sydney, 1989. https://hdl.handle.net/2123/26377.

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This thesis develops a numerical technique to predict the acoustic reflection from an arbitrary sound speed microstructure in the ocean (or a temperature microstructure in the fresh water). This numerical technique is able to reproduce the theoretical formulas for calculating the reflection coefficients of two analytically defined transition layers. The 50 kHz acoustic reflection coefficients from the temperature The 50 kHz acoustic reflection coefficients from the temperature microstructure measured in a fresh-water reservoir was predicted to be less than -90 dB and was found to be much we

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34

Niemeyer, Günter Dieter. "Using wave variables in time delayed force reflecting teleoperation." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10622.

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35

Li, Ye. "Propagation and reflection of pulse waves in flexible tubes and relation to wall properties." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6554.

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The wall properties of the arteries play an important role in cardiovascular function. Stiffness of large artery is predictive of cardiovascular events. To understand the function of the cardiovascular system, special attention should be paid to the understanding of pulse wave propagation, because pulse waves carry information of the cardiovascular function, and provide information which can be useful for the prevention and diagnosis of diseases. This thesis presents a series of in vitro experimental studies of wave propagation, wave reflection and determination of mechanical properties of fle

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36

Khalili, Nasser. "Application of Cepstral techniques to the measurement of reflection coefficients for dispersive systems." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303060.

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37

Roy, Matthew S. "Acute effects of facial cooling on arterial stiffness and wave reflection." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 56 p, 2007. http://proquest.umi.com/pqdweb?did=1397914231&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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38

Li, Xiangyang. "Shear-wave splitting in reflection surveys : theory, methods and case studies." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/12418.

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Over the last decade, the use of multi-component seismic reflection data to study shear-wave splitting has become increasingly common within the hydrocarbon industry to determine the crack geometry of oil reservoirs. Thus, it is important to investigate the characteristics of, develop processing techniques for, and carry out case studies of shear-wave splitting in reflection surveys. I have examined the effects of anisotropic symmetry, particularly orthorhombic symmetry, on velocity variations and moveouts of split shear-waves in vertical off-symmetry planes. I have also examined the effects o

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39

Zhang, Bing. "Joint identification in structural waveguides using wave reflection and transmission coefficients." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/50563/.

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The dynamic modelling of one-dimensional jointed structures is relevant to many engineering applications, such as pipe systems and beam networks in constructions. Currently available techniques are undermined by inadequate ability to model the joints and other discontinuities due to uncertainty in their properties. Measured modal data can be used to update joint models, but often with limited success. In this thesis a wave approach is employed to investigate the reflection and transmission coefficients of various joint models in structural waveguides. The reflection and transmission coefficien

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Berumen, Cantu Jorge Alberto. "Kinetic picture of ion acoustic wave reflection using laser-induced fluorescence." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6368.

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An examination of the first laser-induced fluorescence measurements of ion-acoustic wave reflection is presented in this dissertation. The experiment is performed in a multipole cylinindrical chamber using singly-ionized argon (ArII) plasma produced by a means of a hot cathode. Ion-acoustic waves are launched from a mesh antenna and reflected/absorbed by a biased, solid boundary (electrode). A kinetic analysis of wave reflection is carried out through LIF's ability of resolving ion phase-space. A comparison between Langmuir probe and LIF diagnostics is presented, with complementary Electric-fi

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41

Shin, Chang Soo. "Nonlinear elastic wave inversion by blocky parameterization /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8810420.

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42

Tuerxunjiang, Abulikemu. "FDTD measurement of the reflection coefficient associated with total internal reflection from gainy Lorentzian media." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/A_Tuerxunjiang_120108.pdf.

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Thesis (M.S. in physics)--Washington State University, December 2008.<br>Title from PDF title page (viewed on July 10, 2009). "Department of Physics and Astronomy." Includes bibliographical references (p. 64-68).

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Jiao, Junru. "Residual migration velocity analysis in the plane wave domain : theory and applications /." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3023551.

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Kürschner, Dierk, and Christoph Jacobi. "Long-term behaviour of E-region nighttime LF reflection heights." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-217519.

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The nighttime reflection height of low-frequency (LF) radio waves at oblique incidence is measured at Collm Observatory using 1.8 kHz sideband phase comparisons between the sky wave and the ground wave of a commercial 177 kHz LF transmitter. The measurements have been carried out continuously since September 1982, now allowing the analysis of trends and regular variations of the reflection height. In the time series is found a) a long-term negative trend and b) a solar cycle dependence, both confirming earlier measurements and theoretical estimations. Moreover, a significant oscillation of qua

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Ward, Gavin Stuart. "Deep reflection seismics using S-waves on land." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387057.

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46

Thomson, James M. (James McArthur). "Infragravity waves over topography: generation, dissipation, and reflection." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/39222.

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Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2006.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>Ocean surface infragravity waves (periods from 20 to 200 s) observed along the southern California coast are shown to be sensitive to the bottom topography of the shelf region, where propagation is linear,

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Murray, Stuart William. "Wave radiation in simple geophysical models." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7922.

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Wave radiation is an important process in many geophysical flows. In particular, it is by wave radiation that flows may adjust to a state for which the dynamics is slow. Such a state is described as “balanced”, meaning there is an approximate balance between the Coriolis force and horizontal pressure gradients, and between buoyancy and vertical pressure gradients. In this thesis, wave radiation processes relevant to these enormously complex flows are studied through the use of some highly simplified models, and a parallel aim is to develop accurate numerical techniques for doing so. This thesi

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John, Gelleta. "Three-dimensional Coupled-wave Analysis of External Reflection in Photonic Crystal Lasers." Kyoto University, 2017. http://hdl.handle.net/2433/218016.

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Charonko, John James. "A Nondimensional Scaling Parameter for Predicting Pressure Wave Reflection in Stented Arteries." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/31906.

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Coronary stents have become a very popular treatment for cardiovascular disease, historically the leading cause of death in the United States. Stents, while successful in the short term, are subject to high failure rates (up to 24% in the first six months) due to wall regrowth and clotting, probably due to a combination of abnormal mechanical stresses and disruption of the arterial blood flow. The goal of this research was to develop recommendations concerning ways in which stent design might be improved, focusing on the problem of pressure wave reflections. A one-dimensional finite-diffe

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50

Li, Gavin Sun Man. "Experimental investigation of weak irregular shock wave reflections." Thesis, 2010. http://hdl.handle.net/10539/7800.

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An experimental investigation of weak shock wave reflections was conducted with the large scale shock tube in the Flow Research Unit, in the Mechanical Engineering Laboratory, at the University of the Witwatersrand, Johannesburg. The purpose of the study was to expand the current understanding of irregular shock wave reflections, especially the von Neumann reflection (vNR) and the Guderley reflection (GR). The experiments were conducted using a high sensitivity schlieren system for three Mach numbers in the region around M 1.10 with single-frame and multiple-frame cameras. The single-fra

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