Thesis (Ph. D.)--Ohio State University, 2004. / Title from first page of PDF file. Document formatted into pages; contains xviii, 220 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: R. Shivpuri, Dept. of Industrial, Welding and Systems Engineering. Includes bibliographical references.

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2008. / Includes bibliographical references (leaves 43-45). Also available in electronic version.

published_or_final_version / Mechanical Engineering / Master / Master of Philosophy

A project report submitted to the faculty of engineering, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree of Master of Science in Engineering Johannesburg 1991 / In the economic and social development of any country, an effective road transportation system is an important factor However, it also consumes a large proportion of the total infrastructure costs, while the costs borne by the road user for vehicle operation and depreciation arc even greater. A policy must therefore be adopted in which total community costs for any road link Of network are minimized. To do this meaningfully, alternatives must be developed and compared and the trade-offs between them carefully assessed. This, in turn, requires the ability to quantify the different cost functions for the desired period of analysis. [No abstract provided. Information taken from introduction] / MT2018

Thesis (M. Phil.)--University of Hong Kong, 1992.

Orientador : Wu Shin-Ting / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-04T02:43:33Z (GMT). No. of bitstreams: 1 Melo_VanioFragoso_D.pdf: 1580241 bytes, checksum: 61e5b4c09418c6c4e71a4c96ad52c667 (MD5) Previous issue date: 2004 / Resumo: Esta tese de doutorado tem como objetivo apresentar uma proposta de modelo computacional de superfície deformável. Há duas vertentes de modelos de superfícies deformáveis fisicamente embasados: modelos de mecânica das partículas e modelos de mecânica dos contínuos. Os modelos de mecânica dos contínuos são mais realísticos e intuitivos, por se basearem numa estrutura geométrica contínua e utilizarem os elementos de Geometria Diferencial para a sua análise. Similar a maioria dos modelos deformáveis com base na mecânica dos contínuos, propomos um modelo de superfície deformável com base na superfície de Cosserat elástica. Diferentemente dos modelos existentes na literatura de Computação Gráfica e Animação, o nosso modelo considera a relação entre as deformações tangenciais e normais, e inclui um novo paradigma lineariz ável para estimar os vetores normais. Isto possibilita a formação de dobras e rugas a partir da ação de forças tangenciais. Uma implementação é apresentada. Para corrigir alguns tipos de desequilíbrios criados pelo método das diferenças finitas empregado na discretização, propomos fatores de correções das forças internas atuantes nas bordas. Experimentalmente, o modelo proposto foi validado com aplicações para caimentos, para criação de dobras e rugas de tecido de pano / Abstract: This doctoral thesis aims at presenting a proposal of a computational model for a deformable surface. There are two trends of deformable surface models that are physically based: particle systems and continuum mechanical models. The continuum mechanical models are more realistic and intuitive, since the underlying geometric structure is a continuum which can be analyzed with use of Differential Geometriy. Similar to most of works based on the continuum mechanics, we propose a deformable surface model based on an elastical Cosserat surface. Differently from the existing models in the Graphic Computer and Animation literature, our model considers a relation between the tangential and normal deformations, and integrate a novel linearizable approach for estimating the normal vectors. This provides an efficient way to simulate folds and wrinkles under the action of tangential forces. An implementation is presented. In order to correct some kinds of unbalance of forces, due to the methods of finite differences employed on the discretization, we propose correction factors for the internal forces that act on the boundaries. Experimentally, the proposed model was validated in the simulations of cloth draping, folds and wrinkles of cloth / Doutorado / Engenharia de Computação / Doutor em Engenharia Elétrica