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Thematische Bibliographien / Six-dimensional / Dissertationen

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Dissertationen zum Thema „Six-dimensional“

Autor: Grafiati

Veröffentlicht am 24. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Descheneau, Julie. "A review of six-dimensional braneworld solutions /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80251.

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In the last years, brane world scenarios have been studied extensively, but most of these studies have been done in the case of five-dimensional spacetime. It is therefore of interest to investigate which of the particular features observed are proper to one extra dimension and which are generic to any number of dimensions. In this thesis, I present an overview of models and solutions to Einstein's equations for six-dimensional brane world scenarios. Solutions for a simple setup with cylindrically symmetric bulk centered about a three-brane are derived and classified. There are two main

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Lockhart, Guglielmo Paul. "Self-Dual Strings of Six-Dimensional SCFTs." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17467387.

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In this thesis we aim to characterize the self-dual strings of six-dimensional superconformal field theories (SCFTs) and develop a variety of techniques to compute their elliptic genera, which provide information about their spectra. All known N = (1, 0) supersymmetric SCFTs in 6d can be obtained by compactifying F-theory on an elliptic Calabi-Yau threefold with singular, noncompact base B. Resolving the singularity in B and wrapping D3 branes on the exceptional curves leads to strings on the tensor branch of the SCFT. The strings become tensionless at the superconformal fixed point and appear

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Merkx, Peter R. "Global Symmetries of Six Dimensional Superconformal Field Theories." Thesis, University of California, Santa Barbara, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10620639.

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<p> In this work we investigate the global symmetries of six-dimensional superconformal field theories (6D SCFTs) via their description in F-theory. We provide computer algebra system routines determining global symmetry maxima for all known 6D SCFTs while tracking the singularity types of the associated elliptic fibrations. We tabulate these bounds for many CFTs including every 0-link based theory. The approach we take provides explicit tracking of geometric information which has remained implicit in the classifications of 6D SCFTs to date. We derive a variety of new geometric restrictions on

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Aghababaie, Yashar. "Six-dimensional supergravity braneworlds and the cosmological constant." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100310.

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We review the lore of effective field theories as a background to hierarchy problems in general and the cosmological constant problem in particular. We outline some of the attempted four-dimensional solutions to the cosmological con stant problem and conclude that ones based upon the usual assumptions of four-dimensiona lfield theory typically do not work. We argue that one way to relax the assumptions is to seek solutions to the cosmological constant problem which rely on the presence of extra dimensions. We explicitly exhibit that standard compactification techniques fail to solve the cosmol

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5

Laurie, Jason Paul. "Six-wave systems in one-dimensional wave turbulence." Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/34564/.

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We investigate one-dimensional (1D) wave turbulence (WT) systems that are characterised by six-wave interactions. We begin by presenting a brief introduction to WT theory - the study of the non-equilibrium statistical mechanics of nonlinear random waves, by giving a short historical review followed by a discussion on the physical applications. We implement the WT description to a general six-wave Hamiltonian system that contains two invariants, namely, energy and wave action. This enables the subsequent derivations for the evolutions equations of the one-mode amplitude probability density func

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Biggs, James D. "Integrable Hamiltonian systems on six dimensional Lie groups." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443934.

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7

Kohl, Finn Bjarne. "F-theory on six-dimensional symmetric toroidal orbifolds." Thesis, Uppsala universitet, Teoretisk fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446617.

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In this thesis, compactifications of F-theory on six dimensional symmetric toroidalorbifolds are explored. These orbifold geometries have been mathematically classified and it is natural to ask what the physical implications of string theorycompactifications on those geometries are. Since compactifications of string theory to six dimensions describe a sweet spot in terms of developed methods andrich model-building possibilities, it is interesting to investigate the landscape ofthese theories opposed to the swampland of only apparently consistent quantumtheories of gravity. Additionally, superc

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ROTA, ANDREA. "Holography for six dimensional theories: a universal framework." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2015. http://hdl.handle.net/10281/94885.

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It is challenging to define higher dimensional quantum field theories. For example, a Lagrangian description is often lacking. Moreover, gauge theories are non renormalizable in d > 4. A possible ultraviolet completion is string theory, which is a natural arena for the study of many interesting field theories. In particular, string theory provides us with a powerful tool for the study of conformal field theories: the AdS/CFT correspondence. The AdS/CFT is a duality that relates a theory of quantum gravity in Anti de Sitter space in (p+2)-dimensions to a conformal field theory in (p+1)-dimensi

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Brown, James Ryan. "Complex and almost-complex structures on six dimensional manifolds." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4466.

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Thesis (Ph.D.)--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 (February 26, 2007) Vita. Includes bibliographical references.

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Park, Daniel Sung-Joon. "Lessons from the landscape of six-dimensional supergravity theories." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77073.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 217-232).<br>Comparing the set of supergravity theories allowed by low-energy consistency conditions with the set of string vacua provides useful insights into quantum gravity and string theory. In fact, such a "landscape analysis" for ten-dimensional supergravity theories was at the core of the exciting series of developments that is now referred to as the first superstring revolution. In this thesis, we discuss the lessons we lear

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Simmons, Ronald J. (Ronald Jay). "Six dimensional trajectory solver for automomous [sic] proximity operations." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/42442.

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Akyol, Mehmet. "Six dimensional supergravity, spinorial geometry and (1,0)-superconformal theories." Thesis, King's College London (University of London), 2013. https://kclpure.kcl.ac.uk/portal/en/theses/six-dimensional-supergravity-spinorial-geometry-and-10superconformal-theories(25fe77b5-7f95-4288-b0f2-943c38577ca7).html.

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In this thesis we explore (1,0) supersymmetric theories in six dimensions. The first part of the thesis focuses on the investigation of supersymmetric solutions of (1,0) six dimensional supergravity theory coupled to any number of tensor, vector and scalar multiplets. The methodology used to solve the Killing spinor equations will be based on the spinorial geometry technique. Therefore, we begin by giving details of the spinorial geometry approach in the first chapter. In the chapter that follows six dimensional supergravity coupled to tensor, vector and scalar multiplets is described. Once we

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Schuster, Theodor. "Scattering amplitudes in four- and six-dimensional gauge theories." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/17034.

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Streuamplituden der Quantenchromodynamik (QCD), N = 4 Super-Yang-Mills-Theorie (SYM-Theorie) und der sechsdimensionalen N = (1, 1) SYM-Theorie werden untersucht, mit einem Fokus auf die Symmetrien und Relationen zwischen den Streuamplituden dieser Eichtheorien auf dem Baum-Niveau. Die Baum-Niveau- und Ein-Schleifen-Farbzerlegung beliebiger QCD-Amplituden in primitive Amplituden wird bestimmt und Identitäten hergeleitet, welche den Nullraum unter den primitiven Amplituden aufspannen. Anschließend wird bewiesen, dass alle farbgeordneten Baum-Niveau-Amplituden der masselosen QCD aus der N = 4 SYM

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Labuz, James (James R. ). "Design, fabrication, and testing of a three-dimensional monolithic compliant six-axis nanopositioner." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36741.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaf 36).<br>The purpose of this research was to demonstrate the feasibility for creating a three-dimensional monolithic compliant six-axis nanopositioner. Much of this work was based off of the original two-dimensional HexFlex manipulator created by Prof. Martin Culpepper and a three-dimensional design by Samuel Korb. The compliant mechanism was manufactured from a single sheet of 1/8 inch 5052 Aluminum. The mechanism was designed to be fabricated on the non-pre

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Nuttall, Christopher. "A Self-Regulated Learning Inventory Based on a Six-Dimensional Model of SRL." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6581.

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This report discusses a study undertaken to develop, pilot, and tentatively validate a self- regulated learning (SRL) inventory for L2 contexts. This inventory was specifically designed to measure learners' ability to self-regulate their learning. Although there have been a few SRL inventories developed to measure this ability, they do not conform to the six-dimensional SRL model proposed by educational psychologists and backed by extensive research. This warranted the development of a new SRL inventory. The primary focus of this study was that of taking initial steps to develop such an invent

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Shabanskaya, Anastasia V. "Classification of Six Dimensional Solvable Indecomposable Lie Algebras with a codimension one nilradical over ℝ". University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1301590879.

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Schuster, Theodor [Verfasser], Jan [Akademischer Betreuer] Plefka, Matthias [Akademischer Betreuer] Staudacher, and James [Akademischer Betreuer] Drummond. "Scattering amplitudes in four- and six-dimensional gauge theories / Theodor Schuster. Gutachter: Jan Plefka ; Matthias Staudacher ; James Drummond." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://d-nb.info/1059436698/34.

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Vigano, Nicola Roberto. "Full-field X-ray orientation imaging using convex optimization and a discrete representation of six-dimensional position - orientation space." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0095/document.

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Cette thèse de doctorat introduit un modèle et un algorithme six-dimensions pour la reconstruction des orientations cristallines locales dans les matériaux polycristallins. Le modèle s’applique actuellement aux données obtenues avec un rayonnement synchrotron (faisceau parallèle et monochromatique), mais il est également possible d’envisager des extensions aux instruments et sources de laboratoire (polychromatique et divergent). Le travail présenté est principalement une extension de la technique connue sous le nom de “Diffraction Contrast Tomography” (DCT) qui permet la reconstruction de la f

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Seyyedi, Saeed [Verfasser], Tobias [Akademischer Betreuer] Lasser, Tobias [Gutachter] Lasser, J. Webster [Gutachter] Stayman, and Franz [Gutachter] Pfeiffer. "Advanced Reconstruction and Noise Reduction Techniques in Four- and Six-Dimensional X-ray Imaging Modalities / Saeed Seyyedi ; Gutachter: Tobias Lasser, J. Webster Stayman, Franz Pfeiffer ; Betreuer: Tobias Lasser." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/116577318X/34.

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Fenollosa, Artés Felip. "Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667421.

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La present tesi doctoral s’ha centrat en el repte d’aconseguir, mitjançant Fabricació Additiva (FA), models per a assaig quirúrgic, sota la premissa que els equips per fer-los haurien de ser accessibles a l’àmbit hospitalari. L’objectiu és facilitar l’extensió de l’ús dels prototips com a eina de preparació d’operacions quirúrgiques, transformant la pràctica mèdica actual de la mateixa manera que en el seu moment ho van fer tecnologies com les que van facilitar l’ús de radiografies. El motiu d’utilitzar FA, en lloc de tecnologies més tradicionals, és la seva capacitat de materialitzar de forma

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Balasubramanian, Aswin Kumar. "Four dimensional N=2 theories from six dimensions." Thesis, 2014. http://hdl.handle.net/2152/26049.

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By formulating the six dimensional (0,2) superconformal field theory X[j] on a Riemann surface decorated with certain codimension two defects, a multitude of four dimensional N=2 supersymmetric field theories can be constructed. In this dissertation, various aspects of this construction are investigated in detail for j=A,D,E. This includes, in particular, an exposition of the various partial descriptions of the codimension two defects that become available under dimensional reductions and the relationships between them. Also investigated is a particular observable of this class of four dimensi

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Chung, Cheng-Han, and 鍾承翰. "Neutrino mass and mixing from six dimensional bulk neutrino." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/97157296065202110427.

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碩士<br>國立清華大學<br>物理學系<br>90<br>In six dimensional spacetime, we assume that the left-handed neutrinos live on the brane. Because the right-handed neutrino is a Standard-Model gauge singlet, it is allowed to propagate in the 5+1 - dimensional world and accrue an infinite tower of Kaluza -Klein excitations. Besides, we will also demonstrate the orbifold relations by the symmetry of the Lagrangian in six dimensions. Using these orbifold relations, we can write down the general Lagrangian and the neutrino mass matrix can be obtained.

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Chen, Yi-Jie, and 陳怡傑. "Defect-Free Dimensional Synthesis of Planar Four- and Six-Bar Linkages." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/63676872692582915860.

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博士<br>國立成功大學<br>機械工程學系碩博士班<br>96<br>Order, circuit, and branch defects are frequently encountered in the dimensional synthesis of linkages. In order to obtain mechanisms without defects, it is necessary to investigate the causes for occurring dead-center, order defects, circuit defects, and branch defects for each mechanism, and then propose suitable constraint equations for avoiding defects in the dimensional synthesis processes. The main purpose of this work is to propose a unified method for the defect-free dimensional synthesis of four- and six-bar linkages. The proposed method can be appl

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Lin, Cheng-Chao, and 林正超. "Motion analysis and dimensional synthesis of six link variable speed drive." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/79135338738482513389.

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碩士<br>國立台灣工業技術學院<br>機械工程技術研究所<br>85<br>The purpose of this thesis is to investigate the motion characteristics and dimensional synthesis of an impulse type six-link variable-speed drive mechanism. The displacement analysis and the governing equation for computing the limit positions of the output link of the mechanism is first derived by using analytical method. In addition, a graphical method is presented for solving the possible coordinates of the speed control point of the mechanism. Ba

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Lin, Chi-Pao, and 林祺堡. "Dimensional synthesis of Stephenson III six-bar press using genetic algorithm." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/55100469718817556882.

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碩士<br>國立中興大學<br>機械工程學系所<br>104<br>Stamping presses have a place in n traditional manufacturing industry because of its good productivity, stability and low cost. Presses have various types of processing, like stamping, blanking, embossing, bending, drawing and forging, different types of processing needs different characteristics like stroke, working speed, and tonnage. In this research, we synthesize Stephenson III six-bar mechanism by using motion generation with precision point and genetic algorithm. Genetic algorithm is easy to use on optimization problems, and it can avoid using diffi

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Lin, Cheng-Chun, and 林政君. "Trajectory Construct of Three-Dimensional Model for Six-Axis Robot Manipulator." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/67242618802537601337.

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碩士<br>淡江大學<br>電機工程學系碩士班<br>104<br>In this thesis, a trajectory construction method with a three-dimensional model is proposed and actually applied in a laboratory-developed six-axis robot manipulator. First, based on the information point and point-density in a three-dimensional model to stratify the point information. Then an edge mask is applied to find the edge points and the Hermite curve is used to decide some fit points. Finally, a corresponding trajectory is constructed for this considered point information. In the simulation test, points in a single hierarchical level are first used to

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Wu, Tung-hsien, and 吳東憲. "Optimal Dimensional Synthesis of a Six-bar Hard-top Convertible Roof Mechanism." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/d54qju.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>This thesis deals with the optimal dimensional synthesis of a six-bar hard-top convertible roof mechanism. The mechanism investigated in this study is selected from a number of existing patented mechanisms and the kinematic structure of which is of the Watt’s type I six-bar linkage. The constraint equations in between two prescribed positions of the coupler link are first derived from the vector loop closure equations of three triads, from which it is found that the maximum number of design positions that can be specified for this type of mechanisms is eight. A

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Ying, Chang Hui, and 張慧瑩. "Later on, it Developed into a Three-Dimensional Theory, Then Developed into a Four-Dimensional Theory, and Finally Developed into a Six-Dimensional Theory." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2hb3k5.

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碩士<br>國立中正大學<br>教育學研究所<br>102<br>Abstract Achievement goal theory has developed rapidly in recent years. In the beginning, it was a two-dimensional theory. Later on, it developed into a three-dimensional theory, then developed into a four-dimensional theory, and finally developed into a six-dimensional theory. The primary objective of this study is to construct a scale to measure the achievement goals accomplished by the elementary school teachers. Samples were chosen from a population comprising the teachers employed by 2,587 public elementary schools across Taiwan (Penghu County excluded). A

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JHANG, BO, and 張栢. "Optimal Dimensional Synthesis and Kinetostatic Analysis of Watt-II Six-bar Walking Mechanism." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/gx7g84.

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碩士<br>國立高雄應用科技大學<br>機械工程系<br>106<br>In this study, five evolutionary algorithms-a genetic algorithm (GA), particle swarm optimization (PSO), hybrid particle swarm optimization (HPSO), differential evolution (DE), and self-adaptive differential evolution (SaDE)-were used to optimize dimensional synthesis for the path generation mechanisms of four-bar linkages and Watt-II six-bar linkages. The dimensional synthesis was optimized by minimizing the objective function, which was defined as the sum of squares of the distance error between design points and trajectories of coupler-point of generated

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WANG, SYUAN-CYUAN, and 王炫筌. "Kinematic Analysis and Dimensional Synthesis of A Two Degree of Freedom Spatial Six Link Massaging Mechanism." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/47662471373400887744.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>98<br>This thesis deals with the displacement analysis and dimensional synthesis of a spatial massaging mechanism. A patent search for the massaging mechanisms currently in use is first conducted and the kinematic structure of six such mechanisms are identified and analyzed. It is found that most of which can be classified as two degree of freedom spatial linkages. Therefore this thesis is focused on the study of this type mechanism. Based on the use of spatial rotation matrix, the loop closure equation of the mechanism is first derived and then reduced to a fourth o

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Yao, Cheng-Chiang, and 姚政江. "Application of Multi-Dimensional Feedback Quantized Modulation to Current Control of Six-Switch-Inverter Fed Two Cascaded Electrodynamic Shakers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/72626584225497380142.

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碩士<br>國立交通大學<br>電控工程研究所<br>102<br>In this thesis, two cascaded electrodynamic shakers are fed to a six-switch-inverter. To enlarge the region of the output voltages, the high-efficiency multi-dimensional feedback quantized modulation is used. The results of the conventional pulse-width modulation (PWM) are also provided for comparison. All the controls are implemented in FPGA to verify the proposed method. Finally, we verify the difference between PI-PWM and PI-MDFQM by simulation and experiment.

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Tung-Lin, Hsieh, and 謝東霖. "Optimum Dimensional Synthesis of Planar Four-bar Path Generating Linkages and Prosthetic Six-bar Linkages of Knee Joint by Evolutionary Algorithms." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/sth247.

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碩士<br>國立高雄應用科技大學<br>機械與精密工程研究所<br>102<br>In this study, we design coupler point of four-bar path generating linkages for trajectory curve and applied Genetic Algorithms (GA), Particle Swarm Optimization (PSO), the Hybrid Particle Swarm Optimization (HPSO), Differential Evolution (DE), Hybrid Differential Evolution (HDE). First, we used optimization design of planar four-bar path generating linkages, used watt six-bar knee joint linkages human ankle joint trajectory of synthetic, can achieve human footsteps design movement, gait and trajectory close to normal human and passed the point of coupl

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Li, Chung-Heng, and 李仲珩. "A Study on Visual Preference of the Six Native Trees on the Campus of National Chengchi University Through The Visualizad Simulation of Three-Dimensional Modeling." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/01611768613629516067.

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碩士<br>國立臺灣大學<br>森林學研究所<br>92<br>Abstract The main purpose of this study is to elaborate the effect of plants’ shape, texture and color on landscape through the simulation of computerized three-dimensional modeling. Six native trees (Michelia compressa ，Calocedrus formosana ，Cinnamomum camphora，Liquidambar formosana ，Koelreuteria elegans spp.formosana and Prunus campanulata) are put separately in single-tree design and mixed-tree design around two historically memorial buildings on campus of National Chengchi University to explore the faculty, administrators and students’ visual preference fo

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Robles-Martinez, P., X. Xu, S. J. Trenfield, et al. "3D Printing of a Multi-Layered Polypill Containing Six Drugs Using a Novel Stereolithographic Method." 2019. http://hdl.handle.net/10454/17370.

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Yes<br>Three-dimensional printing (3DP) has demonstrated great potential for multi-material fabrication because of its capability for printing bespoke and spatially separated material conformations. Such a concept could revolutionise the pharmaceutical industry, enabling the production of personalised, multi-layered drug products on demand. Here, we developed a novel stereolithographic (SLA) 3D printing method that, for the first time, can be used to fabricate multi-layer constructs (polypills) with variable drug content and/or shape. Using this technique, six drugs, including paracetamo

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