Дисертації з теми "Spherical coordinate"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-26 дисертацій для дослідження на тему "Spherical coordinate".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Garrett, Travis Marshall Evans Charles Ross. "Simulating binary inspirals in a corotating spherical coordinate system." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1112.
Повний текст джерелаTitle from electronic title page (viewed Mar. 27, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Physics and Astronomy." Discipline: Physics and Astronomy; Department/School: Physics and Astronomy.
Perez, Alex C. "Applications of Relative Motion Models Using Curvilinear Coordinate Frames." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5529.
Повний текст джерелаMatthews, Karyn. "A spherical coordinate tidal model of the Great Australian Bight using a new coastal boundary representation /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phm4391.pdf.
Повний текст джерелаBao, Wentao. "A Simulation and Optimization Study of Spherical Perfectly Matched Layers." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1494166698903702.
Повний текст джерелаEstrada, Marroquín Paolo Tito. "Magnetohydrodynamics of rotating plasma under satationary equilibrium in spherical coordinates." reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/44084.
Повний текст джерелаDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Física. Defesa: Curitiba, 24/05/2016
Inclui referências : f. 77-79
Resumo: Foi derivada uma equação de equilíbrio estacionário MHD de plasmas em rotação na direcção azimutal, no caso de um sistema de coordenadas esféricas, describindo o plasma como um fluido,e considerando a entropia como uma quantidade de superfície. A equação obtida é resolvida utilizando uma abordagem analítica e numérica para os perfis escolhidos das funções de corrente e de pressão em termos da função de fluxo. Gráficos foram feitos da solução obtida por este método. A rotação afecta apenas alguns componentes do campo magnético, da densidade decorrente, a corrente de fluxo poloidal, assim como a função de fluxo também é afectada pela rotação. palavras-chave: mhd. plasma. rotação. equilíbrio. estacionário
Abstract: An equation for MHD stationary equilibrium of rotating plasmas in the azimuthal direction is derived in the case of an spherical coordinate system, with a plasma description of a fluid, considered the entropy is a surface quantity. The equation obtained is solved using both an analytical and a semi-numerical approach for chosen profiles for the current and the pressure functions in terms of the flux function. Plots were made of the solution obtained by this method. The rotation affects only some components of the magnetic field and the current density, the flux function is also affected by the rotation. Keywords: mhd. plasma. rotation. equilibrium. stationary.
Breckenridge, Richard P. "Localization of multiple broadband targets in spherical coordinates via adaptive beamforming and non-linear estimation." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27121.
Повний текст джерелаHemingway, Douglas J., and Isamu Matsuyama. "Isostatic equilibrium in spherical coordinates and implications for crustal thickness on the Moon, Mars, Enceladus, and elsewhere." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/625778.
Повний текст джерелаAlmestiri, Saleh Mohamed. "The Dual of SU(2) in the Analysis of Spatial Linkages, SU(2) in the Synthesis of Spherical Linkages, and Isotropic Coordinates in Planar Linkage Singularity Trace Generation." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1524241477831728.
Повний текст джерелаStålberg, Martin. "Reconstruction of trees from 3D point clouds." Thesis, Uppsala universitet, Avdelningen för systemteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316833.
Повний текст джерелаTörnros, Martin. "Interactive visualization of space weather data." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-101986.
Повний текст джерелаBingol, Haluk Erdem. "Bearings Only Tracking." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613048/index.pdf.
Повний текст джерелаChen, Pei-Ning, and 陳培寧. "Breakdown simulation of spherical P-N junction with spherical coordinate system." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/77971241238314913448.
Повний текст джерела國立中央大學
電機工程學系
101
The thesis develops a 3D spherical grid model, base on spherical coordinate and combined with impact-ionization model for the spherical P-N junction breakdown simulation. At theory aspect, we use poisson’s equation, electron and hole continuity equation to transfer the equivalent circuit into a model, and simulate the drift-diffusion current, generation and recombination current. At the structure, study the feature of spherical grid, and use trapezoid mesh to approximate the curvature, then build up the parameters. The breakdown voltage at spherical junction will be simulated with different radius and doping, and the result will be compared with Cartesian coordinate to verify this model. This model not only shows a good accuracy but also shows a less simulation time. Finally we investigate the application and feature of the 3D spherical grid model.
Yang, Ya-Wen, and 楊雅雯. "A Study on the Spherical Coordinate Based Fragile Watermarking Scheme for 3D Models." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/84960627703306943530.
Повний текст джерела國立中興大學
資訊科學與工程學系所
99
Recently, due to the fast development of three dimensional (3D) models, watermarking three dimensional (3D) models for authentication and verification has become more and more important. In this paper, a new spherical coordinate based fragile watermarking scheme is proposed. At first, the three dimensional (3D) model is translated from the Cartesian coordinate system to the spherical coordinate system. Then the quantization index modulation technique is employed to embed and extract the watermark into the r coordinate for authentication and verification. By adapting the quantization index modulation technique together with some keys in the spherical coordinate system, the proposed method is robust against vertex reordering and similarity transformation attacks. Moreover, the distortion is controlled by the quantization step setting. Experimental results show that both the 100% embedding rate and low distortion can be achieved simultaneous in the proposed method. Moreover, the causality, convergence and synchronization problems can be overcome. Finally, the proposed scheme is robust against vertex reordering and similarity transformation attacks.
Huang, Jia-Ke, and 黃家科. "Study on Micro Spherical Probes Gluing and Fabrication for Micro Coordinate Measuring Machine." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/c297nr.
Повний текст джерела國立臺北科技大學
製造科技研究所
99
This paper describes fabricating technology to produce micro ball-ended spherical stylus tips for micro CMM’s tactile probing head. The study mainly used micro EDM method to glue and assemble micro glass spherical stylus tips. With combination of Wire Electro Discharge Grinding (WEDG) technology and position controlling function of CNC micro EDM, a micro ball-ended stylus could be assembled onto the front-top of micro electrode tool successfully. CCD in-process measurement was used to measure the profile and roundness of the styli tips. In order to investigate the fabrication characteristics, the study also used One Pulse Electric Discharge (OPED) technology to fabricate metal micro spherical stylus tips. The experimental results show that the roundness of the largest profile micro glass ball-ended stylus tips with diameter 0.07μm is as small as 2μm and adhesive force decreases rapidly at approximately 10.5mN. With the improvement of positional control technology and adhesive material, the gluing and assembling process of micro ball-ended stylus tips could be used on micro CMM’s tactile probing head for micro components metrology in the near future.
LIU, CHIEH, and 劉潔. "Robust 3D Mesh Zero-watermarking Scheme based on Spherical Coordinate and Skewness Measurement." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9w568b.
Повний текст джерела逢甲大學
資訊電機工程碩士在職學位學程
107
The purpose of the study is to design a zero-watermarking scheme for protecting copyright of 3D mesh objects. Owing to advance in technology, 3D models are commonly used in multiple fields such as healthcare, filmdom, interactive entertainment, and construction industry. In order to avoid the dangers of copying and using them without authentication, a novel zero-watermarking method based on the transformation of spherical coordinate and skewness of angle statistic is proposed. The main challenge is the robust feature selection and construction of the watermark. The skewness measure of the spherical angle is used to be the resilient feature. Experimental results display the robustness of the proposed scheme during common attacks such as translation, vertex reordering, uniform scaling, noise addition, smoothing, simplification, and cropping. This has demonstrated that the new method is suitable for the applications of the fields which need highly accurate 3D models.
Matthews, Karyn. "A spherical coordinate tidal model of the Great Australian Bight using a new coastal boundary representation / Karyn Matthews." Thesis, 1995. http://hdl.handle.net/2440/18639.
Повний текст джерелаAbbas-Pour, Nima. "A Numerical Model for Oil/water Separation from an Accelerating Oil-coated Solid Particle." Thesis, 2013. http://hdl.handle.net/1807/42657.
Повний текст джерелаLin, Yung-chin, and 林詠進. "Breakdown simulation of a spherical PN junction in cylindrical coordinates." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/79624541975897000626.
Повний текст джерела國立中央大學
電機工程研究所碩士在職專班
100
In this thesis, the breakdown phenomenon of a spherical PN junction is studied in 3D cylindrical coordinates. We analyze the shift of I-V curve, potential deviation and compare the deviation between 3D cylindrical coordinates and 3D Cartesian coordinates. We develop the trapezoid 3D cube in cylindrical coordinates. The simulation speed and accuracy in 3D cylindrical coordinates is better than that in Cartesian coordinates. We also verify the simulation result with the theory. Then, we change different parameters such as the radius of a p-n junction, doping concentration and grid points to see the dependence of breakdown voltage on these parameters. Finally, we study how to find a better grid design and get a better simulation result.
Wang, Jun-Jei, and 王俊傑. "Application of Turing Model on Spherical Coordinates and Pattern Simulation of Watermelon surface." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/60785019187296161217.
Повний текст джерелаTseng, Jui-Ming, and 曾瑞閔. "A formally fourth-order compact scheme for Poisson equation in cylindrical and spherical coordinates." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/57402558870573501716.
Повний текст джерела國立交通大學
應用數學系所
94
A simple and efficient compact fourth-order Poisson solver in cylindrical and spherical coordinates is presented. The solver relies on the truncated Fourier series expansion, where the differential equations of Fourier coefficients have been solved by fourth-order finite difference discretizations without pole conditions. And two kinds of efficient iterative method, GMRES and Bi-CGSTAB, with different preconditioners are applied to solve the resulted nonsymmetrical systems of Fourier coefficients.
Fan, Eric Sheung-Chi. "A Numerical Model for Oil/Water Separation from a Solid Particle." Thesis, 2010. http://hdl.handle.net/1807/24566.
Повний текст джерелаLin, Hsin-An, and 林信安. "Breakdown simulation of a spherical PN junction with a small-angle method in 3D rectangular coordinates." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/36525755852071436134.
Повний текст джерела國立中央大學
電機工程研究所碩士在職專班
100
In this thesis, the major discussion is to improve the computer calculation time with the original simulation program in 3D rectangular coordinates. The small-angle method is used to divide the original silicon component into two parts. One is silicon region and the other is silicon-oxide region. The silicon region is inside the small-angle region, and we use the added silicon-oxide region to meet the simulation in 3D rectangular coordinates. Using this method, the simulation time is reduced to only one percent of the original. Further, the developed method is verified for its validity by the test with different parameters. So the small-angle method in 3D rectangular coordinates is workable and valuable.
Λουκάς-Λεκατσάς, Ιωάννης. "Σκέδαση ακουστικών κυμάτων από ζεύγος σφαιρικών σκεδαστών". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/4200.
Повний текст джерелаA plane wave is scattered by an acoustically soft, hard or penetrable sphere, covered by a penetrable non-concentric spherical lossless shell which disturbs the propagation of the incident plane wave field. There is exactly one bispherical coordinate system that fits the given two-sphere obstacle. If the wavelength of the incident field is much larger than the radius of the exterior sphere, Low Frequency Theory reduces the scattering problem to a sequence of potential problems which can be solved iteratively Applying the corresponding boundary value problem for each case, a set of two equations results as well as a recurrence equation with three unknown sequence of coefficients for zero-th order, and the first-order approximation is obtained, by solving two sets of two equations and a recurrence equation with three unknown sequence coefficients each for the soft core or the calculation of the zero–th order coefficients of the hard or penetrable core, leads to a solution of a linear system of two equations with two unknown columns and tri-diagonal square matrices are coefficients of the unknown columns, while the first-order approximation is obtained, by solving two linear systems of two equations with four unknown columns and eight tri-diagonal matrices as coefficients of the unknown columns. Applying the cut-off method for soft, hard and penetrable sphere, the low-frequency coefficients of the zero-th and first-order for the near field as well as the first and second-order coefficients are obtained for the normalized scattering amplitude and cross section. Decreasing the distance d of the centres we conclude that the problem of scattering concentric cell cannot be considered special case of mentioned before problem. A plane wave is scattered by an acoustical soft acoustic sphere embedded into an acoustically lossless half space, which disturbs the propagation of the incident wave field. In the first step, the problem of sound diffraction by only a penetrable plane is solved, were the amplitudes of reflective and diffractive acoustical waves are calculated. In the second step the diffractive as an incident wave is scattered by the embedded acoustical soft sphere. The low frequency zero-th and first order coefficients of the near field are calculated for the soft scatterer and finally the scattering amplitude and cross-section are determined.
Wongwathanarat, Annop [Verfasser]. "Multidimensional simulations of core collapse supernovae using a two-patch overset grid in spherical coordinates / Annop Wongwathanarat." 2011. http://d-nb.info/101109715X/34.
Повний текст джерелаKUTOVÁ, Eva. "Aplikovaná matematika --- Sbírka řešených příkladů." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-80181.
Повний текст джерелаCochran, Caroline. "THE EQUIVALENCE PROBLEM FOR ORTHOGONALLY SEPARABLE WEBS ON SPACES OF CONSTANT CURVATURE." 2011. http://hdl.handle.net/10222/14191.
Повний текст джерела