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Dissertations / Theses on the topic 'In - phase method'

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Published: 28 May 2022

Last updated: 30 July 2025

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1

Li, Yichen. "Phase-field Modeling of Phase Change Phenomena." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99148.

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The phase-field method has become a popular numerical tool for moving boundary problems in recent years. In this method, the interface is intrinsically diffuse and stores a mixing energy that is equivalent to surface tension. The major advantage of this method is its energy formulation which makes it easy to incorporate different physics. Meanwhile, the energy decay property can be used to guide the design of energy stable numerical schemes. In this dissertation, we investigate the application of the Allen-Cahn model, a member of the phase-field family, in the simulation of phase change prob

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2

Monchenko, O. V. "Uncertainly estimation in phase ultrasound method." Thesis, National Aviation University, 2014. http://er.nau.edu.ua/handle/NAU/25036.

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The new multi-layer materials widely be used in aircraft. In the article present the new method of multi-layer material thickness measurement, which is based on the digital Hilbert transformation and the signal unwrapped phase analysis and offered uncertainly estimation for two-layers materials.

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3

Rannou, Guillaume. "Lattice-Boltzmann method and immiscible two-phase flow." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26560.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Cyrus K. Aidun; Committee Member: Marc K. Smith; Committee Member: S. Mostafa Ghiaasiaan. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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4

Onilude, Ayodele. "A novel method for phase distribution measurement in water continuous two-phase flow." Thesis, University of Huddersfield, 2017. http://eprints.hud.ac.uk/id/eprint/34406/.

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Multiphase flows are occurring in several areas of the process industries. It is the concurrent flow of a mixture of fluid and solid components/phases. The multiphase flows are dependent on the flow regimes, the pipe orientation and the flow properties of the constituent phases such as the flow velocity and the volume fraction. Solids-liquid flows, such as slurries it occurs in horizontal and inclined pipes. Slurries have been used for transporting solid materials over long and short distances in various industries; these industries include the oil and gas industry, the mining industry and the

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5

Argyropoulos, Christos. "A combined immersed boundary/phase-field method for simulating two-phase pipe flows." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/51089.

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The investigation of the flow in a pipe is a major issue for the pipeline capacity but also plays an important role for the control and prevention of phenomena that could damage the pipe, such as corrosion, erosion, and the potential formation of wax or their deposits. Therefore, the characterization of the flow patterns is also a major issue for the prediction of the distribution over the cross-section of the pipe, in order to understand any problems that may interrupt or shut down the operation of the production line. The main purpose of the present effort is to develop an appropriate numeri

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6

Ammar, Kais. "Modelling and simulation of phase transformation-mechanics coupling using a phase field method." Paris, ENMP, 2010. https://theses.hal.science/tel-00508677.

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Nous proposons un cadre générique, permettant l'incorporation des différentes lois de comportement de mécanique linéaires ou non-linéaires (i. E. Elastoviscoplastique) dans les approches des champs de phases utilisées pour la modélisation et la simulation de la mobilité d'interfaces diffuses. Dans ce cadre, une formulation par éléments finis des modèles couplés champ de phases-élastoplasticité pour les alliages binaires est développée dans le formalisme général de la thermodynamique des milieux continus. Cette formulation est basée sur la théorie d'équilibre des microforces, proposée par Gurti

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7

Freed, David M. (David Michael). "A digital physics method for two phase flow." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43571.

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8

Roach, Peter L. "Synthesis of peptides by the solid phase method." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/14289.

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An investigation into the use of a novel N<SUP>PROB*LEM</SUP> protecting group in peptide synthesis is described. The protecting group, 2,2-<i>bis</i>(4'-nitrophenyl)ethoxycarbonyl (Bnpeoc), has been introduced into the full range of amino acids, including those requiring appropriate side chain protection. The Bnpeoc amino acid derivatives have been successfully applied to the solid phase synthesis of a number of peptides from ubiquitin. In addition, the peptides were assembled using a wide range of coupling reagents and conditions. The chemical syntheses of phage λ Cro protein and peptides fr

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9

Zhu, Jun. "Analysis of transmission system faults in the phase domain." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1061.

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In order to maintain a continuous power suppply, nowadays relays in transmission systems are required to be able to deal with complicated faults involving non-conventional connections, which poses a challenge to the short circuit analysis performed for the data settings of the relay. The traditional sequence domain method has congenital defects to treat such cases, which leads to a trend of using the actual phase domain method in fault calculation. Although the calculation speed of the phase domain method is not so fast and is memory consumable, it perfomrs well when handling complicated fau

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10

Ling, S. J. "Dense phase pneumatic conveying of fine coal." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381038.

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11

Aberegg, Keith R. "Electromagnetic scattering using the integral equation-asymptotic phase method." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/14860.

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12

Senay, Aras Betul. "Investigation of Some Cell Morphology Using Phase Field Method." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503067908468122.

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13

Dong, Hao. "Adaptive moving grid method to two-phase flow problesm." HKBU Institutional Repository, 2011. http://repository.hkbu.edu.hk/etd_ra/1275.

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14

Binkley, Meisha A. "Aryl Acetate Phase Transfer Catalysis: Method and Computation Studies." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2680.

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Brief explanation and history of cinchona based Phase Transfer Catalysis (PTC). Studied aryl acetates in PTC, encompassing napthoyl, 6-methoxy napthoyl, phenyl and protected 4-hydroxy phenyl acetates. Investigated means of controlling the selectivity of the PTC reaction by changing the electrophile size, the ether side group size or by addition of inorganic salts. Found that either small or aromatic electophiles increased enantioselectivity more than aliphatic electrophiles, and that increasing the size of ether protecting group also increased selectivity. Positive effects of salt addition inc

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15

Neubeck, Anna-Karin. "The Prodromal Phase of What? : A Metapsychiatric Analysis of the Prodromal Phase of Schizophrenia." Doctoral thesis, Linköping : Department of Medical and Health Sciences, Division of Health and Society, Linköping University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15201.

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16

Bernauer, Martin. "Motion Planning for the Two-Phase Stefan Problem in Level Set Formulation." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-63654.

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This thesis is concerned with motion planning for the classical two-phase Stefan problem in level set formulation. The interface separating the fluid phases from the solid phases is represented as the zero level set of a continuous function whose evolution is described by the level set equation. Heat conduction in the two phases is modeled by the heat equation. A quadratic tracking-type cost functional that incorporates temperature tracking terms and a control cost term that expresses the desire to have the interface follow a prescribed trajectory by adjusting the heat flux through part of the

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17

Long, Tian. "Modeling and Numerical Simulation Method for Multiphase Flow with Phase Change." Electronic Thesis or Diss., Sorbonne université, 2025. http://www.theses.fr/2025SORUS012.

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Les écoulements multiphasiques avec changement de phase sont courants dans les processus naturels et les applications industrielles. Une compréhension plus approfondie des transferts de masse et de chaleur sous-jacents est bénéfique pour faire avancer les technologies associées. Ces dernières années, avec le développement rapide des ordinateurs haute performance, la simulation numérique est devenue un outil important pour étudier les flux de changement de phase en raison de sa flexibilité et de sa capacité à fournir des informations physiques complètes. Cependant, en raison de sa complexité in

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18

Apte, Pankaj A. "Phase equilibria and nucleation in condensed phases: a statistical mechanical study." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1135876018.

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19

Shen, Chen. "The fundamentals and applications of phase field method in quantitative microstructural modeling." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1080249965.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 217 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Yunzhi Wang, Dept. of Materials Science and Engineering. Includes bibliographical references (p. 209-217).

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20

Cai, Shiqian. "An artificial neural network method for three phase flow measurement." Thesis, Imperial College London, 1995. http://hdl.handle.net/10044/1/8227.

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21

Dong, Yanchang. "A Novel Optical Transmission Method using an Inline Phase Modulator." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/dong/DongY0506.pdf.

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This thesis presents a novel optical communication technique that provides a second, low data rate channel on an existing high-speed fiber optic link. The second channel is derived using an acousto optic fiber phase modulator and interferometeric receiver. This method modulates the optical phase of the primary high speed optical signal with a low frequency sine wave. At the receiving end of the low speed path, an interferometer and band pass fiber are used to recover the low-speed signal. Information is carried on the low frequency sine wave by use of FSK modulation. The method is noninvasive

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22

Hou, Yue. "Computational Analysis of Asphalt Binder based on Phase Field Method." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/47783.

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The mechanical performance evaluation of asphalt binder has always been a challenging issue for pavement engineers. Recently, the Phase Field Method (PFM) has emerged as a powerful computational tool to simulate the microstructure evolution of asphalt binder. PFM analyzes the structure from the free energy aspect and can provide a view of the whole microstructure evolution process. In this dissertation, asphalt binder performance is analyzed by PFM in three aspects: first, the relationship between asphalt chemistry and performance is investigated. The components of asphalt are simplified to th

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23

Tye, Thomas N. "Application of digital signal processing methods to very high frequency omnidirectional range (VOR) signals in the design of an airborne flight measurement system." Ohio University / OhioLINK, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1177702951.

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24

Zou, Ziqiang. "A sharp interface method for low Mach two-phase flows with phase change Toward asymptotic-preserving low-Mach correction for sharp interface two-phase flows with capillary effects An Accurate Sharp Interface Method for Two-Phase Compressible Flows at Low-Mach Regime." Thesis, université Paris-Saclay, 2020. https://tel.archives-ouvertes.fr/tel-03178310.

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Une approche d'interface raide est présentée pour le calcul des écoulements diphasiques avec tension superficielle et changement de phase en régime à faible nombre de Mach. Pour développer un tel modèle, où de légers effets compressibles sont pris en compte ainsi que des fermetures thermodynamiques correctes, le liquide et le gaz sont considérés comme compressibles et décrits par un solveur compressible précis. Ce solveur compressible adopte une technique de décomposition appelée "décomposition du transport acoustique" qui décompose le système Euler en deux parties: acoustique et transport. Su

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25

Wang, Heyu. "Moving finite element methods for phase-field models of solidification." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/882.

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26

Gu, Hanfeng. "Multigrid methods for 3D composite material simulation and crack propagation modelling based on a phase field method." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI090/document.

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Avec le développement des techniques d’imagerie telles que la tomographie par rayons X au cours des dernières années, il est maintenant possible de prendre en compte la microstructure réelle dans les simulations des matériaux composites. Cependant, la complexité des composites tels que des fibres inclinées et brisées, les vides, exige un grand nombre des données à l’échelle microscopique pour décrire ces détails et amène ainsi des problèmes difficiles en termes de temps de calcul et de mémoire lors de l’utilisation de méthodes de simulation traditionnelles comme la méthode Eléments Finis. Ces

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27

Li, Yangxin. "The finite analytic method applied to gas-solid two-phase flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39676.pdf.

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28

Hidle, Frederick B. "Application of the integral equation asymptotic phase method to penetrable scatterers." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15797.

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29

Düsing, Martin [Verfasser]. "Simulation of bainitic transformation with the phase field method / Martin Düsing." Paderborn : Universitätsbibliothek, 2018. http://d-nb.info/1171305648/34.

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30

Morgan, Nathaniel Ray. "A New Liquid-Vapor Phase Transition Technique for the Level Set Method." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6895.

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The level set method offers a simple and robust approach to modeling liquid-vapor interfaces that arise in boiling and condensing flows. The current liquid-vapor phase-transition techniques used with the level set method are not able to account for different thermal conductivities and specific heats in each respective phase, nor are they able to accurately account for latent heat absorption and release. This paper presents a new level set based technique for liquid-vapor phase-transition that accounts for different material properties in each respective phase, such as thermal conductivity an

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31

McFerran, Jennifer. "An Electromagnetic Method for Cancer Detection." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1253558341.

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32

Johansson, Niklas. "Implementation of a standard level set method for incompressible two-phase flow simulations." Thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-154651.

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The level set method is a powerful way of tracking surfaces by defining the surface as a zero level set of a continuous function that is usually a signed distance function. The level set method is one of the best methods for simulating multi-phase flow because it can easily handle fast topological changes, as well as splitting and merging of fluids. In this thesis, a standard level set method was implemented in C++, using the finite element method library deal.II, to simulate incompressible two-phase flow on some benchmark problems. The results show a significant change of mass in the simulati

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33

"Synchronization method applied to three-phase pwmconverters." Tese, Biblioteca Digital de Teses e Dissertações da UFSM, 2006. http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=371.

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34

Ya-Hui, Chen, and 陳雅惠. "Three-Phase Method for Manufacturing System Evaluation." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/02563606329746437548.

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碩士<br>國立清華大學<br>工業工程研究所<br>83<br>It is a difficult work for many companies to maintain or gain a competitive edge in the market-place because of the fast changing environment and customers'' needs. Thus, many firms modify their formal production system to fit the changing demand by exploiting the advantages of modern technologies. A decision support framework is proposed in this study to integrate the strategy planning into the system evaluation process to mak

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35

Hwang, Zhao-Hong, and 黃兆宏. "Application of Phase-Shifting Method in photoelasticity." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/99900085494765563581.

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碩士<br>國立中興大學<br>機械工程學系<br>87<br>ABSTRACT The goal of this thesis is to propose an automatic fringe counting algorithm for photoelastic pattern, including the isoclinic as well as isochomatic fringes of photoelasticity stress pattern. There are three main tasks in the thesis. Firstly, we proposed a general formula for ordering of isoclinic and isochromatic fringes of plane polariscope. On the second, we proposed a novel approach to search the inconsistent area in the wrapped data for overcoming the divergence of celluar automata phase unwrapping. Finally, we overcame the unwrapping p

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Bhati, Satish Harjibhai. "Fingerprint Mosaicing Using Modified Phase Correlation Method." Thesis, 2015. http://ethesis.nitrkl.ac.in/7727/1/2015_Fingerprint_Bhati.pdf.

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Fingerprint is widely used biometric traits to identify individual due to uniqueness. However, the fingerprint identification is still a challenging task in forensic science for criminal investigation and identification due to less area of region of interest (i.e. ridges and valleys) in the obtained fingerprints. Entire fingerprint is obtained only when it is given intentionally. In the case of criminal incidents, it is not always possible to get entire fingerprints. In such cases, obtained fingerprints are often partial i.e. having less region of interest. Therefore, if it is possible to get

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37

Wang, Yun-Chu, and 王韻筑. "Passive Air Sampling Method for Gas-Phase Phthalates by Solid-Phase Microextraction." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40413625802477855830.

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碩士<br>臺灣大學<br>環境衛生研究所<br>98<br>Phthalates are widely used in a variety of industries, mainly as plasticizers. Many consumer products contain phthalates, such as building materials, cosmetics and medical devices. It exhibits low acute toxicity but its estrogenic activity has been documented. Previous studies also indicate that the inhalation is an important exposure route, especially from indoor air. For the assessments of gas-phase phthalates exposures, traditional methods usually require complicated pretreatment processes, which further lead to the possible loss of the analytes and large cons

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邱聰輝. "A Study of GPS Carrier Phase Positioning Method." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/61841457147194252358.

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碩士<br>中華大學<br>航空太空工程學系<br>86<br>In this research both the absolute and relative positioning method based on carrier phase are studied. The relative Positing are obtarned by using the carrier phase tripple difference of the two receivers for different times and different satellites, in which the satellite orbit errors and the inospheric errors are modelled by the tirsf or second order power series approximation, then solved by the lest-square-error method. This methodology was not studied in the past. The advantage of which is to raise the accuracy to centi-meter level, which can be used for t

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(5930573), Sriharsha Challa. "Numerical Methods for Single-phase and Two-phase Flows." Thesis, 2019.

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<div>Incompressible single-phase and two-phase flows are widely encountered in and underlie many engineering applications. In this thesis, we aim to develop efficient methods and algorithms for numerical simulations of these classes of problems. Specically, we present two schemes: (1) a modied consistent splitting scheme for incompressible single-phase flows with open/out flow boundaries; (2) a three-dimensional hybrid spectral element-Fourier spectral method for wall-bounded two-phase flows.</div><div><br></div><div><div>In the first part of this thesis, we present a modied consistent splitti

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Kim, Donghoon. "Isothermal Gas-liquid Flow Using the Lattice Boltzmann Method." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9776.

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As the operating conditions of the pressurized water reactor (PWR) have been increased towards the thermal limits of the core for economics, the subcooled boiling heat transfer performance of the rod bundles under normal operating conditions has become an increasingly important design focus. Effective field models such as two-fluid model, on which most previous numerical studies in the nuclear fields have focused, cannot predict detailed phenomenon of subcooled boiling because it involves complex multiphase dynamics, such as nucleation, growth, detachment bubbles from a wall, deformation, brea

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Yang, Huang-Lin, and 楊凰琳. "A New Cumulant Based Phase Estimation Method For Nonminimum- Phase Systems By Allpass Filtering." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/66589059993387283986.

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碩士<br>國立清華大學<br>電機工程研究所<br>81<br>The identification of a linear time-invariant (LTI) system h( n) with only noisy output measurements is very important in many signal processing areas such as seismic deconvolution, channel equalization in communications, radar, sonar, speech processing and image processing. Recently, cumulant based identification of nonminimum-phase LTI systems with only non-Gaussian output measurements has drawn extensive attention in the previous signal pr

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HO, HSIANG-KUEI, and 何庠逵. "The Three-phase Shift Method with Arbitrary Fixed Phase Difference for Three-dimensional Measurement." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/69205483363317596915.

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碩士<br>國立中央大學<br>資訊工程學系<br>103<br>In this study, we use structured light to measure three-dimensional information of objects. Traditional structured light project sinusoidal fringe structured light onto the objects, capturing images with CCD cameras, and measure their three-dimensional structure with a phase shift technology. In order to achieve the purpose of fast measurement, we use the three-phase shift technology and CUDA (Compute Unified Device Architecture) parallel processing algorithms to improve measurement speed. Further, for future application of continuous motion production line, we

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Lin, Chun-Yu, and 林群育. "A High Resolution Method of Phase Frequency Detection for All Digital Phase-Locked Loop." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/66436703890971030436.

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碩士<br>國立交通大學<br>電控工程研究所<br>99<br>We proposed a high resolution phase method of frequency detection for all digital phase locked loop. We use single output of the phase detector to obtain phase and frequency information for both frequency search and phase maintain modes. When the frequency search is finished, the phase error between the reference clock and the feedback clock will approach to zero. So the proposed method can reduce the circuit complexity and locking time of a phase-locked loop system. The proposed ADPLL is implemented in UMC 90nm 1P9M standard CMOS technology with standard cell.

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Lee, Wei-Zhe, and 李維哲. "he Use of Fringe Projection Method and Phase Shift Method to Measure 3D Surface." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/egnh48.

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碩士<br>國立臺北科技大學<br>工業工程與管理系碩士班<br>105<br>Because of the PCB printed circuit board began to be a lot of use. With the evolution of science and technology, circuit board size is getting smaller and smaller, Precision measurement become important. So this study would like to measure the PCB solder ball Three - Dimensional surface In this study, we used striped projection method and four-step phase shift method and phase unwrapping, combining with camera for machine vision to complete the PCB solder ball measurement. The system use the projector with lens, the projection structure of light in the

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Huang, Ting-Yi, and 黃婷翊. "Application of fringe projection method and four-step phase shifting method for tool inspection." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/rqr4r8.

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Lee, Yi-Chien, and 李宜蒨. "Microstructural Analysis for Ferroelectric Materials by Using Phase-Field Method and Sharp-Interface Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5pk4u3.

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碩士<br>國立交通大學<br>材料科學與工程學系所<br>106<br>A procedure is Ferroelectric materials have been widely used in many applications of sensors, actuators and memory devices in recent decades. These materials have strong electrical, thermal, or mechanical coupling, giving an opportunity for crystals to sense the change of external loading or boundary conditions. The microstructure is the most important factor to determining the crystal properties. However, there are some limitations of typical microstructural modeling. For example, certain patterns of microstructure are assumed for sharp interface models, a

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Zhang, Weijia. "Statistical design of phase I clinical trials." 2016. http://hdl.handle.net/1993/31795.

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My MSc thesis is focused on parametric designs of Phase I clinical trials, using the continual reassessment method. A parametric model with unknown parameters is assumed. The observations are either toxic or nontoxic. Observations of toxicities are used to update the posterior distribution. Dose selection for the next patient is based on the estimated toxicity probability. The objective is to identify the maximum tolerated dose to be used in Phase II clinical trials. We introduce a new class of parametric functions for the continual reassessment method. This class is formed with the cumulative

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Adegoke, Modupe Florence. "Novel method of analysis for DPOAE magnitude and phase :." 2010. http://hdl.handle.net/10090/16187.

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Vuckovic, Dajana. "Solid-phase microextraction as sample preparation method for metabolomics." Thesis, 2010. http://hdl.handle.net/10012/5106.

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The main objective of the emerging field of metabolomics is the analysis of all small molecule metabolites present in a particular living system in order to provide better understanding of dynamic processes occurring in living systems. This type of studies is of interest in various fields including systems biology, medicine and drug discovery. The main requirements for sample preparation methods used in global metabolomic studies are lack of selectivity, incorporation of a metabolism quenching step and good reproducibility. The efficiency of metabolism quenching and stability of analytes in se

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Yeh, Yao-Chia, and 葉曜嘉. "Determination of Trace Chlorophenol by Solid-Phase Microertraction Method." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/76120034648848643761.

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