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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Three dimensional contact topology. / CUHK electronic theses & dissertations collection

January 2013 (has links)
Low, Ho Chi. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 76-79). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts also in Chinese.
52

Holographic 3D image display : layer-based method and coarse integrated holograms

Chen, Jhen-Si January 2015 (has links)
No description available.
53

Margulis number for hyperbolic 3-manifolds.

January 2011 (has links)
Yiu, Fa Wai. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 55-58). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.6 / Chapter 2 --- Elementary properties and notations of Hyperbolic space --- p.9 / Chapter 3 --- Poisson kernel and Conformal densities --- p.16 / Chapter 3.1 --- Poisson kernel --- p.17 / Chapter 3.2 --- Conformal densities --- p.19 / Chapter 4 --- Patterson construction and decomposition --- p.27 / Chapter 4.1 --- Patterson construction --- p.27 / Chapter 4.2 --- Patterson decomposition --- p.33 / Chapter 5 --- Bonahon surfaces and Grided surfaces --- p.39 / Chapter 5.1 --- Bonahon surfaces --- p.40 / Chapter 5.2 --- Grided surfaces --- p.46 / Chapter 6 --- Margulis number of Hyperbolic Manifolds --- p.51 / Margulis Number for Hypcrbolic 3-manifolds --- p.5 / Chapter 6.1 --- Gcomertrically finite groups --- p.51 / Chapter 6.2 --- Margulis number of Closed Hyperbolic Manifolds --- p.53 / Bibliography --- p.55
54

3D object reconstruction from 2D and 3D line drawings.

January 2008 (has links)
Chen, Yu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 78-85). / Abstracts in English and Chinese. / Chapter 1 --- Introduction and Related Work --- p.1 / Chapter 1.1 --- Reconstruction from 2D Line Drawings and the Applications --- p.2 / Chapter 1.2 --- Previous Work on 3D Reconstruction from Single 2D Line Drawings --- p.4 / Chapter 1.3 --- Other Related Work on Interpretation of 2D Line Drawings --- p.5 / Chapter 1.3.1 --- Line Labeling and Superstrictness Problem --- p.6 / Chapter 1.3.2 --- CAD Reconstruction --- p.6 / Chapter 1.3.3 --- Modeling from Images --- p.6 / Chapter 1.3.4 --- Identifying Faces in the Line Drawings --- p.7 / Chapter 1.4 --- 3D Modeling Systems --- p.8 / Chapter 1.5 --- Research Problems and Our Contributions --- p.10 / Chapter 1.5.1 --- Recovering Complex Manifold Objects from Line Drawings --- p.10 / Chapter 1.5.2 --- The Vision-based Sketching System --- p.11 / Chapter 2 --- Reconstruction from Complex Line Drawings --- p.13 / Chapter 2.1 --- Introduction --- p.13 / Chapter 2.2 --- Assumptions and Terminology --- p.15 / Chapter 2.3 --- Separation of a Line Drawing --- p.17 / Chapter 2.3.1 --- Classification of Internal Faces --- p.18 / Chapter 2.3.2 --- Separating a Line Drawing along Internal Faces of Type 1 --- p.19 / Chapter 2.3.3 --- Detecting Internal Faces of Type 2 --- p.20 / Chapter 2.3.4 --- Separating a Line Drawing along Internal Faces of Type 2 --- p.28 / Chapter 2.4 --- 3D Reconstruction --- p.44 / Chapter 2.4.1 --- 3D Reconstruction from a Line Drawing --- p.44 / Chapter 2.4.2 --- Merging 3D Manifolds --- p.45 / Chapter 2.4.3 --- The Complete 3D Reconstruction Algorithm --- p.47 / Chapter 2.5 --- Experimental Results --- p.47 / Chapter 2.6 --- Summary --- p.52 / Chapter 3 --- A Vision-Based Sketching System for 3D Object Design --- p.54 / Chapter 3.1 --- Introduction --- p.54 / Chapter 3.2 --- The Sketching System --- p.55 / Chapter 3.3 --- 3D Geometry of the System --- p.56 / Chapter 3.3.1 --- Locating the Wand --- p.57 / Chapter 3.3.2 --- Calibration --- p.59 / Chapter 3.3.3 --- Working Space --- p.60 / Chapter 3.4 --- Wireframe Input and Object Editing --- p.62 / Chapter 3.5 --- Surface Generation --- p.63 / Chapter 3.5.1 --- Face Identification --- p.64 / Chapter 3.5.2 --- Planar Surface Generation --- p.65 / Chapter 3.5.3 --- Smooth Curved Surface Generation --- p.67 / Chapter 3.6 --- Experiments --- p.70 / Chapter 3.7 --- Summary --- p.72 / Chapter 4 --- Conclusion and Future Work --- p.74 / Chapter 4.1 --- Conclusion --- p.74 / Chapter 4.2 --- Future Work --- p.75 / Chapter 4.2.1 --- Learning-Based Line Drawing Reconstruction --- p.75 / Chapter 4.2.2 --- New Query Interface for 3D Object Retrieval --- p.75 / Chapter 4.2.3 --- Curved Object Reconstruction --- p.76 / Chapter 4.2.4 --- Improving the 3D Sketch System --- p.77 / Chapter 4.2.5 --- Other Directions --- p.77 / Bibliography --- p.78
55

Survey on Heegaard Floer homology.

January 2007 (has links)
Suen, Chun Kit Anthony. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 89-92). / Abstracts in English and Chinese. / Abstract --- p.iii / Abstract --- p.iv / Acknowledgements --- p.v / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Morse Homology --- p.5 / Chapter 2.1 --- Introduction --- p.5 / Chapter 2.2 --- Classical Morse Theory and Morse Functions --- p.5 / Chapter 2.3 --- Handlebody Decomposition for 3-manifold --- p.7 / Chapter 2.4 --- Stable manifold and Unstable manifold --- p.10 / Chapter 2.5 --- Trajectory flows and the Morse-Smale-Witten Complex --- p.11 / Chapter 3 --- Lagrangian Floer Homology --- p.22 / Chapter 3.1 --- Introduction --- p.22 / Chapter 3.2 --- Preliminaries on Symplectic Geometry --- p.23 / Chapter 3.2.1 --- Basic Definitions --- p.23 / Chapter 3.2.2 --- The Symplectic Group --- p.26 / Chapter 3.2.3 --- Maslov index for non-degenerate paths in Sp(2n) --- p.28 / Chapter 3.2.4 --- Maslov index - the analytic aspect --- p.35 / Chapter 3.3 --- Definition of Floer Homology --- p.37 / Chapter 3.4 --- Some Remarks --- p.41 / Chapter 4 --- Heegaard Floer Homology --- p.43 / Chapter 4.1 --- Introduction --- p.43 / Chapter 4.2 --- Basic Set-Up --- p.43 / Chapter 4.3 --- Topological Preliminaries --- p.44 / Chapter 4.3.1 --- Symmetric Product --- p.44 / Chapter 4.3.2 --- The Tori Tα and Tβ --- p.47 / Chapter 4.3.3 --- Intersection Points and Disks --- p.48 / Chapter 4.3.4 --- Domains --- p.52 / Chapter 4.3.5 --- Spinc Structures --- p.54 / Chapter 4.3.6 --- Holomorphic Disks and Maslov Index --- p.63 / Chapter 4.4 --- Definition of Heegaard Floer Homology --- p.65 / Chapter 4.4.1 --- The chain complex CF --- p.66 / Chapter 4.4.2 --- The chain complex CF∞ --- p.67 / Chapter 4.4.3 --- The chain complexes CF+ and CF- --- p.68 / Chapter 4.4.4 --- Some Remarks --- p.70 / Chapter 5 --- Examples and Applications --- p.72 / Chapter 5.1 --- Introduction --- p.72 / Chapter 5.2 --- The homology three-spheres --- p.72 / Chapter 5.2.1 --- The sphere S3 --- p.72 / Chapter 5.2.2 --- The Poincare sphere and the Brieskorn spheres --- p.74 / Chapter 5.2.3 --- Long exact surgery sequence and the absolutely graded Hee- gaard Floer homology --- p.78 / Chapter 5.3 --- More Application --- p.84 / Chapter 5.3.1 --- Knot Floer homology --- p.84 / Chapter 5.3.2 --- Invariants on 4-manifolds --- p.86 / Chapter 5.4 --- Further developments --- p.87 / Bibliography --- p.89
56

Microstructural Characterization, Visualization, and Simulation of Ti-B Materials

Lieberman, Scott Ian 20 March 2007 (has links)
Additions of boron in modified titanium alloys and Ti-B composites result in the in situ formation during high temperature processing of TiB reinforcement phases that improve the mechanical properties and wear resistance of unreinforced titanium alloys, while still utilizing the high strength-to-weight ratio and excellent corrosion resistance of titanium. Several boron-modified titanium alloys and Ti-B composites in a Ti-6Al-4V matrix have been investigated to determine the effect of processing parameters on the TiB reinforcement phases and resultant microstructures and mechanical properties. Using optical microscopy, scanning electron microscopy, conventional characterization techniques, and newly developed methodologies for three-dimensional visualization, the microstructures of these Ti-B materials have been studied. Observations included a similar anisotropic whisker morphology with roughly hexagonal cross-sections among all TiB phases; alignment of all TiB phases with extrusion, with the extent of alignment affected by thermomechanical processing parameters; brittle fracture behavior of TiB whiskers, with fracture down the length of whiskers not aligned in the tensile direction and across the width of whiskers aligned in the tensile direction; and discoveries of the anisotropic morphologies of the coarse primary TiB phase and the sub-micron precipitated TiB phase. It has been observed that extruded boron-modified alloys with compositions in the hypoeutectic regime of the quaternary system of titanium, alloying elements aluminum and vanadium, and boron, containing a unimodal size distribution of eutectic TiB whiskers, significantly improve the strength and stiffness compared to unreinforced Ti-6Al-4V alloy while also demonstrating tensile elongation to failure within the fracture-critical limits required for aerospace structural applications. Materials design methodologies have been developed using Ti-B materials, and they show promise for predicting the effects of processing parameters and the resultant microstructures and mechanical properties for boron-modified titanium alloys and Ti-B composites optimized for a variety of commercial and industrial applications.
57

Research of Changes and Influences in CCP's Original Theory Caused by "Three Represents Theory"-Take Private Entrepreneur's Political Participation as an Example

Chou, Shuo-yen 29 January 2005 (has links)
After CCP established its political power in 1949, they still follow Lenin style of Communism. How CCP can combat the successive collapse of Communism regimes all over the world in the early 1990¡¦s, and become the biggest communism on earth? How could Mainland China become the regional leading power in 21st century which attracts the greatest amount of foreign investment, and continuously maintain economic power growth in twenty years? In 2001, The ¡§Three Represents Theory¡¨, proposed by Jiang Zemin, is suited to access that if CCP can truly start its political reform. In order to find the joint of CCP¡¦s original theory and national development, CCP make a vital theoretical correction of its ideological disciplines which maintain the governance legitimacy of CCP regime. The attempt of this research is try to solve the questions listed below: 1. Nowadays, in the few remainders of communist regimes, CCP is the biggest. Could CCP resist universal current of democracy and liberty, and maintain its way to practice party autocracy in Mainland China? 2. What¡¦s the concept and influence of Jiang Zemin¡¦s ¡§Three Represents Theory¡¨? What is its contradictory between CCP¡¦s original theory and the ¡§Three Represents Theory¡¨? How ¡§Three Represents¡¨ reconcile the contradictory in theoretical controversy? 3. The development of ¡§Three Represents Theory¡¨ makes CCP start to validate the legitimacy of ¡§capitalist class¡¨; besides it broaden and safeguard the political participation of ¡§private entrepreneur¡¨. We¡¦re trying to find out the development process of this aspect. ¡§Three Represents¡¨ open a window for capitalist class¡¦ political participation; what we want to know is that whether CCP can efficiently control the political participation of private entrepreneurs. 4. What¡¦s the influence of ¡§Three Represents Theory¡¨ in future political development? Is ¡§Three Represents theory¡¨ the starting point of the political reform in Mainland China? Or it is just ¡§Jiang Zemin¡¦s personal performance¡¨ as the razzle-dazzle fireworks before his retirement?
58

none

Hsiao, Ming-hui 13 July 2007 (has links)
none
59

Multifocal plane microscopy for the study of cellular dynamics in 3D /

Prabhat, Prashant, January 2008 (has links)
Thesis (Ph.D.)--University of Texas at Dallas, 2008. / Includes vita. Includes bibliographical references (leaves 139-146)
60

Polygonal meshing for stereo video surface reconstruction /

Gill, Sunbir. January 2007 (has links)
Thesis (M.Sc.)--York University, 2007. Graduate Programme in Computer Science. / Typescript. Includes bibliographical references (leaves118-124). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38774

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