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Dissertations / Theses on the topic 'Velocity components'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Lidén, Ewa. "Interaction between High-velocity Penetrators and Moving Armour Components." Doctoral thesis, Uppsala universitet, Tillämpad mekanik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132922.

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This work was aimed at understanding mechanisms of importance for the design of weight-efficient armour against long-rod projectiles (LRP) and shaped charge (SC) warheads. The focus was on how to achieve effective mechanical disturbances on the threat before it hits the target. Methods were developed for laboratory tests in full and reduced scale, and for registration and evaluation of the fast and violent events involved. For numerical simulations, the Xue-Wierzbicki fracture model was implemented and used for the LRP in order to allow fractures due to shear load without extensive damage of t

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2

Su, Bei. "EFFECTS OF RAILROAD TRACK STRUCTURAL COMPONENTS AND SUBGRADE ON DAMPING AND DISSIPATION OF TRAIN INDUCED VIBRATION." UKnowledge, 2005. http://uknowledge.uky.edu/gradschool_diss/312.

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A method for numerical simulation of train induced track vibration and wave propagation in subgrade has been proposed. The method uses a mass to simulate the bogie of a train and considers the effect of rail roughness. For this method, rail roughness is considered as a randomly generated signal and a filter is used to block the undesired components. The method predicts the particle velocity around the track and can be applied to many kinds of railroad trackbeds including traditional ballast trackbed and modern Hot mix asphalt (HMA) trackbed. Results from ballast and HMA trackbeds are compared

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3

Azhdar, Bruska. "Novel Technique to Improve High-Velocity Cold Compaction : Processing of Polymer Powders and Polymer-Based Nanocomposite High Performance Components." Doctoral thesis, Stockholm : Department of Fiber and Polymer Technology, Chemical Science and Engineering, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4133.

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4

Korzhova, Valentina N. "Tracking Fluid Flow in a Spinning Disk Reactor." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3813.

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The flow of a liquid film over a rapidly rotating horizontal disk has many applications inmedical, industrial, and engineering fields. A specific example is the heat and mass transfer processes between expanded liquid and surrounded dense gas. Diferent wave regimes of a liquid film depend on a flow conditions such as the properties of a liquid, its initial speed,parameters of environment, etc. Therefore, experimental investigation of the film flow over a spinning disk is needed to both validate theoretical predictions and establish methods for fluid flow monitoring.This thesis presents novel v

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5

Cohen, Rona. "The effects of aligned developmental feedback on third-grade students' performance in overhand throw for force." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1179446083.

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6

Kratochvíl, Pavel. "Analýza seismického rychlostního pole." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220661.

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Seismic velocities are an important prerequisite for seismic processing as a method for hydrocarbons accumulations detection. Seismic velocities are often displayed for mutual comparing, improvement checking, they are filtrated and recalculated for its different characteristic determination. This work deals with basic seismic propagation laws, the meaning of velocities in different stages of seismic processing and this theoretical background is followed by a proposition of method for calculating and displaying of stack velocities.

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7

Wong, Wilson Kia Onn. "To what extent and why has the structure of the global automotive components industry changed since the 1980s? : an analysis of the global tyres, seats, constant velocity joints, brakes and automotive semiconductor sectors." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648395.

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8

Antoine, Marc M. E. "A rapidly scanning three-velocity-component laser Doppler anemometer." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104288.

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9

Roldan, Becerra Ivan H. "Dual velocity-component investigation of transient growth in the Blasius boundary layer." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/12641.

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Transient growth of finite three-dimensional perturbations in wall-bounded laminar shear flows has been extensively studied theoretical, numerical and experimentally. With regard to the experimental work, the vast majority of the investigations have been focused only on the behaviour of the streamwise velocity component, u', despite the importance of the spanwise gradient of the wall-normal velocity component, [Symbols appear here. To view, please open pdf attachment], as the forcing agent. The present study provides a step forward in the experimental characterisation of transient growth provi

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10

Madsen, Carl-Frédéric. "An investigation of velocity bias with a three-component LDA in open channel flow." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42571.

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<p>Data collected with a three-component laser Doppler anemometer system is used to investigate velocity bias. The data is collected in the viscous layer of a fully developed turbulent open water flow at a Reynolds number of 14,766 based on the flow depth. The data collected at a relatively low data rate is analyzed using different correction methods including: straight forward arithmetical averaging, inverse velocity and transit time weighting. The streamwise mean velocity components, the RMS values and the kinematic Reynolds stress are computed using the various weighting methods and a

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11

Madsen, Carl-Frederic. "An investigation of velocity bias with a three-component LDA in open channel flow /." This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-05092009-040709/.

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12

Chesnakas, Christopher J. "Total velocity vector measurements in an axial-flow compressor using a 3-component Laser Doppler Anenometer." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43963.

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13

Scarberry, Thomas T. "Improved velocity data in circular jets using an avalanche photodiode-based 2-component point Doppler velocimeter." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2187.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains viii, 80 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 47-51).

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14

Hayes, D. G. "Tomographic flow measurement by combining component distribution and velocity profile measurements in 2-phase oil/gas flows." Thesis, University of Manchester, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501710.

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This thesis describes the development of a novel tomographic imaging system which can measure the concentration and velocity profiles in two-phase oil/gas flows. Two-phase flow measurement is a problem of great strategic and commercial importance to the oil industry. For example, an oilwell seldom produces just oil; there is often a significant quantity of gas and/or water present and it is very important to know how much of each is being produced. Unfortunately, this turns out to be a very demanding: task, particularly when the components have significantly different densities as in oil/gas f

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15

Schwenke, Thorsten. "Wear of the tibial polyethylene component in total knee replacements the significance of sliding velocity during gait." Aachen Shaker, 2009. http://d-nb.info/999573780/04.

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16

Schwenke, Thorsten [Verfasser]. "Wear of the Tibial Polyethylene Component in Total Knee Replacements – The Significance of Sliding Velocity During Gait / Thorsten Schwenke." Aachen : Shaker, 2010. http://d-nb.info/1124365796/34.

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17

Shinpaugh, Kevin A. "Measurements in the bimodal region of a wing-body junction flow with a rapidly-scanning two-velocity-component laser-Doppler velocimeter." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-163435/.

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18

Polanka, Marcus Damian. "Detailed film cooling effectiveness and three component velocity field measurements on a first stage turbine vane subject to high freestream turbulence /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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19

Кольсун, В. А. "Способи поліпшення енергетичних показників систем живлення енергоємних установок з регульованим електроприводом". Дисертація, Видавництво НГУ, 2010. http://ir.nmu.org.ua/handle/123456789/120.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.03 – Електротехнічні комплекси та системи. – Національний гірничий університет, Дніпропетровськ, 2010.<br>Диссертация на соискание ученой степени кандидата технических наук по специальности 05.09.03 – Электротехнические комплексы и системы. – Национальный горный университет, Днепропетровск, 2010<br>The thesis for a candidate’s degree by specialty 05.09.03 – Electrotechnical complexes and systems. – National Mining University, Dnipropetrovsk, 2010<br>Дисертація присвячена поліпшенню показників якості електр

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20

Wong, William Chiu-Kit. "CFD Flame Spread Model Validation: Multi-Component Data Set Framework." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/918.

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"Review of the literature shows that the reported correlation between predictions and experimental data of flame spread vary greatly. The discrepancies displayed by the models are generally attributed to inaccurate input parameters, user effects, and inadequacy of the model. In most experiments, the metric to which the model is deemed accurate is based on the prediction of the heat release rate, but flame spread is a highly complex phenomenon that should not be simplified as such. Moreover, fire growth models are usually made up of distinctive groups of calculation on separate physical phen

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21

Schwanke, Peter. "Implementation into DIVIMP of a drift-kinetic model derived from the Fokker-Planck equation to examine the parallel-to-B velocity component of impurity ions in divertor-Tokamak plasmas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62896.pdf.

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22

Wang, Li Ge. "Particle breakage mechanics in milling operation." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28950.

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Milling is a common unit operation in industry for the purpose of intentional size reduction. Considerable amount of energy is consumed during a grinding process and much of the energy is dissipated as heat and sound, which often makes grinding into an energy-intensive and highly inefficient operation. Despite many attempts to interpret particle breakage during a milling process, the grindability of a material in a milling operation remains aloof and the mechanisms of particle breakage are still poorly understood. Hence the optimisation and refinement in the design and operation of milling are

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23

Boggs, Cheryle Ann. "Glacial Drift Thickness and Vs Characterized Using Three-Component Passive Seismic Data at the Dominion Stark-Summit Gas Storage Field, North Canton, Ohio." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1420815127.

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24

Faye, El Alioune. "Cisaillement pariétal et tourbillons en écoulement Taylor-Couette." Thesis, La Rochelle, 2013. http://www.theses.fr/2013LAROS393.

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Ce travail est une étude expérimentale permettant de mettre en évidence la cartographie générale de l’ensemble des états d’écoulement obtenus entre le régime laminaire de Couette et la turbulence. L’ensemble des expériences a été réalisé dans un dispositif appelé système Taylor-Couette (STC), composé de deux cylindres concentriques avec le cylindre intérieur tournant. Ces différentes instabilités (SPI, TVF, WVF, MWVF, TTVF), qui dépendent principalement du nombre de Taylor (Ta), seront obtenues avec ou sans débit axial dans le STC selon des protocoles d’analyse bien définis et nous notons que

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25

Shu-Chuan, Wang, and 王淑娟. "Association of cardiovascular risk factors , metabolic syndrome and its components on pulse wave velocity among adult Taiwanese population." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/45799467870253453096.

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碩士<br>國防醫學院<br>公共衛生學研究所<br>92<br>Objectives： The purpose of this study was to evaluate the association between cardiovascular risk factors and arterial stiffness pulse wave velocity (PWV) among adult Taiwanese.Furthermore, we also examined the association of metabolic syndrome and its components between PWV to explore which component was most associated with subclinical atherosclerosis among adults. Methods： Totally 754（491 men and 263 women）were included in this cross-sectional survey.A structure questionnaire was performed to evaluate th

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26

Ebrahimi, Kambiz M., and R. Whalley. "Automotive gas turbine regulation." 2004. http://hdl.handle.net/10454/2636.

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No<br>A multivariable model of an automotive gas turbine, obtained from the linearized system equations is investigated. To facilitate vehicle speed changes, whilst protecting the system against thermal damage, control of the power turbine inlet gas temperature and gas generator speed is proposed by feedback regulation. Fuel flow and the power turbine nozzle area variations are the selected, manipulatable inputs. Owing to the limited control energy available for regulation purposes a multivariable, optimum, minimum control effort strategy is employed in the inner loop controller design study.

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27

Rattan, Sanjay S. P. "Nonlinear complex principal component analysis : applications to tropical Pacific wind velocity anomalies." Thesis, 2004. http://hdl.handle.net/2429/15354.

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Principal component analysis (PCA) has been generalized to complex principal component analysis (CPCA), which has been widely applied to complex-valued data, 2-D vector fields, and complexified real data through the Hilbert transform. Nonlinear PCA (NLPCA) can also be performed using auto-associative feed-forward neural network (NN) models, which allows the extraction of nonlinear features in the dataset. This thesis introduces a nonlinear complex PCA (NLCPCA) method, which allows nonlinear feature extraction and dimension reduction in complexvalued datasets. The NLCPCA uses the architecture o

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28

Richter, Sandra. "Charakterisierung grundlegender Verbrennungseigenschaften von alternativen Treibstoffen und Treibstoffkomponenten." 2018. https://tubaf.qucosa.de/id/qucosa%3A33893.

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Im Rahmen dieser Arbeit wurden die laminaren Flammengeschwindigkeit und die Zündverzugszeit für verschiedene alternative Treibstoffe und Treibstoffkomponenten experimentell bestimmt. Mit Farnesan, Alcohol-to-Jet SPK, Alcohol-to-Jet SKA und ReadiJet wurden vier verschiedene alternative Treibstoffe untersucht, die sich durch ihre Herkunft und in ihrer Zusammensetzung unterscheiden. Die Betrachtung einzelner Treibstoffkomponenten diente der Untersuchung inwieweit die Molekülstruktur einen Einfluss auf die Verbrennungseigenschaften hat. Dazu wurde aus jeder der vier Hauptstrukturgruppen (n-Alkane,

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29

"Interaction of birth weight and ethnicity with component of insulin resistance syndrome and pulse wave velocity." Tulane University, 2005.

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Background. Birth weight (BW) has been found to be associated with cardiovascular (CV) mortality and morbidity, as well as with an adverse profile of many CV risk factors. One possible mechanism mediating the relationship between BW and adulthood risk of CV diseases is an increased arterial rigidity in persons with low BW Methods. Between 1973 and 2001, seven cross-sectional surveys of children 5--17 years and 7 cross-sectional surveys of young adults 18 to 44 were conducted in the Bogalusa Heart Study (BHS). Names of 2780 volunteers were included in the study. A subgroup (n = 835) for whom PW

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30

Deng, Yi-Jie, and 鄧以傑. "Crustal Velocity Structures Imaged from Four-Component OBS Data across the Northern Gagua Ridge off Eastern Taiwan." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/5de5gj.

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碩士<br>國立臺灣海洋大學<br>應用地球科學研究所<br>104<br>Gagua Ridge, the largest linear ridge in the western part of the Philippine Sea Plate off eastern Taiwan, is northward subducted beneath the Eurasian Plate in the Ryukyu subduction zone. In this study, we analyzed 14 four-component ocean-bottom seismometer (OBS) data along MGL0906-16 (T4) line of the 2009 TAIGER experiment to build a P-wave velocity model and a Poisson’s ratio model across the northern Luzon Arc, the Huatung Basin, the Taitung Canyon, the northern Gagua Ridge and the West Philippine Basin off eastern Taiwan. Firstly, P-wave velocities and

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31

Byun, Jung Joo. "Laminar burning velocities and laminar flame speeds of multi-component fuel blends at elevated temperatures and pressures." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-516.

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Iso-octane, n-heptane, ethanol and their blends were tested in a constant volume combustion chamber to measure laminar burning velocities. The experimental apparatus was modified from the previous version to an automatically-controlled system. Accuracy and speed of data acquisition were improved by this modification. The laminar burning velocity analysis code was also improved for minimized error and fast calculation. A large database of laminar burning velocities at elevated temperatures and pressures was established using this improved experimental apparatus and analysis code. From this la

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32

林子喻. "P-Wave Velocity and Vp/Vs Ratio of Hydrate-Bearing Sediments at Jiulong Methane Reef in the Northern South China Sea from Four-Component OBS Data along Profiles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47775634218714249954.

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33

Lima, Rojas Irma Deytia. "Investigation of hydrodynamic scaling relationships in shallow spouted beds." 2011. http://trace.tennessee.edu/utk_graddiss/1098.

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Important global hydrodynamic relationships for shallow spouted beds of high-density particles were characterized in terms of three features: minimum spouting velocity, overall bed pressure drop at minimum spouting velocity; and fountain height. Spouted bed literature is sparse for shallow beds (static particle depth to bed diameter ≤ 1) and beds with heavy particles (density > 3000 kg/m3). Correlations for such beds were developed here by varying column diameter, static bed height, particle diameter, particle density, gas density and gas flow in an ambient temperature and pressure bed. The de

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34

"The Effect of a Splitter Plate on the Flow around a Surface-Mounted Finite Circular Cylinder." Thesis, 2011. http://hdl.handle.net/10388/ETD-2011-09-171.

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Splitter plates are passive flow control devices for reducing drag and suppressing vortex shedding from bluff bodies. Most studies of splitter plates involve the flow around an “infinite” circular cylinder, however, in the present study the flow around a surface-mounted finite-height circular cylinder, with a wake-mounted splitter plate, was studied experimentally in a low-speed wind tunnel using a force balance and single-component hot-wire anemometry. Four circular cylinders of aspect ratios AR = 9, 7, 5 and 3 were tested for a Reynolds number range of Re = 1.9×10^4 to 8.2×10^4. The splitt

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35

Zamboni, P., E. Menegatti, P. Conforti, Simon J. Shepherd, M. Tessari, and Clive B. Beggs. "Assessment of cerebral venous return by a novel plethysmography method." 2012. http://hdl.handle.net/10454/6249.

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BACKGROUND: Magnetic resonance imaging and echo color Doppler (ECD) scan techniques do not accurately assess the cerebral venous return. This generated considerable scientific controversy linked with the diagnosis of a vascular syndrome known as chronic cerebrospinal venous insufficiency (CCSVI) characterized by restricted venous outflow from the brain. The purpose of this study was to assess the cerebral venous return in relation to the change in position by means of a novel cervical plethysmography method. METHODS: This was a single-center, cross-sectional, blinded case-control study conduct

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