Thesis (MEng) -- Stellenbosch University, 2014. / ENGLISH ABSTRACT: See PDF for abstract. / AFRIKKANSE OPSOMMING: Sien PDF vir die opsomming.

by Choi Mo Fung Kenneth. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 105-112). / Abstract also in Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Constraint Satisfaction Problems --- p.2 / Chapter 1.2 --- Constraint Satisfaction Techniques --- p.2 / Chapter 1.3 --- Motivation of the Research --- p.4 / Chapter 1.4 --- Overview of the Thesis --- p.5 / Chapter 2 --- Related Work --- p.7 / Chapter 2.1 --- Min-conflicts Heuristic --- p.7 / Chapter 2.2 --- GSAT --- p.8 / Chapter 2.3 --- Breakout Method --- p.8 / Chapter 2.4 --- GENET --- p.9 / Chapter 2.5 --- E-GENET --- p.9 / Chapter 2.6 --- DLM --- p.10 / Chapter 2.7 --- Simulated Annealing --- p.11 / Chapter 2.8 --- Genetic Algorithms --- p.12 / Chapter 2.9 --- Tabu Search --- p.12 / Chapter 2.10 --- Integer Programming --- p.13 / Chapter 3 --- Background --- p.15 / Chapter 3.1 --- GENET --- p.15 / Chapter 3.1.1 --- Network Architecture --- p.15 / Chapter 3.1.2 --- Convergence Procedure --- p.18 / Chapter 3.2 --- Classical Optimization --- p.22 / Chapter 3.2.1 --- Optimization Problems --- p.22 / Chapter 3.2.2 --- The Lagrange Multiplier Method --- p.23 / Chapter 3.2.3 --- Saddle Point of Lagrangian Function --- p.25 / Chapter 4 --- Binary CSP's as Zero-One Integer Constrained Minimization Prob- lems --- p.27 / Chapter 4.1 --- From CSP to SAT --- p.27 / Chapter 4.2 --- From SAT to Zero-One Integer Constrained Minimization --- p.29 / Chapter 5 --- A Continuous Lagrangian Approach for Solving Binary CSP's --- p.33 / Chapter 5.1 --- From Integer Problems to Real Problems --- p.33 / Chapter 5.2 --- The Lagrange Multiplier Method --- p.36 / Chapter 5.3 --- Experiment --- p.37 / Chapter 6 --- A Discrete Lagrangian Approach for Solving Binary CSP's --- p.39 / Chapter 6.1 --- The Discrete Lagrange Multiplier Method --- p.39 / Chapter 6.2 --- Parameters of CSVC --- p.43 / Chapter 6.2.1 --- Objective Function --- p.43 / Chapter 6.2.2 --- Discrete Gradient Operator --- p.44 / Chapter 6.2.3 --- Integer Variables Initialization --- p.45 / Chapter 6.2.4 --- Lagrange Multipliers Initialization --- p.46 / Chapter 6.2.5 --- Condition for Updating Lagrange Multipliers --- p.46 / Chapter 6.3 --- A Lagrangian Reconstruction of GENET --- p.46 / Chapter 6.4 --- Experiments --- p.52 / Chapter 6.4.1 --- Evaluation of LSDL(genet) --- p.53 / Chapter 6.4.2 --- Evaluation of Various Parameters --- p.55 / Chapter 6.4.3 --- Evaluation of LSDL(max) --- p.63 / Chapter 6.5 --- Extension of LSDL --- p.66 / Chapter 6.5.1 --- Arc Consistency --- p.66 / Chapter 6.5.2 --- Lazy Arc Consistency --- p.67 / Chapter 6.5.3 --- Experiments --- p.70 / Chapter 7 --- Extending LSDL for General CSP's: Initial Results --- p.77 / Chapter 7.1 --- General CSP's as Integer Constrained Minimization Problems --- p.77 / Chapter 7.1.1 --- Formulation --- p.78 / Chapter 7.1.2 --- Incompatibility Functions --- p.79 / Chapter 7.2 --- The Discrete Lagrange Multiplier Method --- p.84 / Chapter 7.3 --- A Comparison between the Binary and the General Formulation --- p.85 / Chapter 7.4 --- Experiments --- p.87 / Chapter 7.4.1 --- The N-queens Problems --- p.89 / Chapter 7.4.2 --- The Graph-coloring Problems --- p.91 / Chapter 7.4.3 --- The Car-Sequencing Problems --- p.92 / Chapter 7.5 --- Inadequacy of the Formulation --- p.94 / Chapter 7.5.1 --- Insufficiency of the Incompatibility Functions --- p.94 / Chapter 7.5.2 --- Dynamic Illegal Constraint --- p.96 / Chapter 7.5.3 --- Experiments --- p.97 / Chapter 8 --- Concluding Remarks --- p.100 / Chapter 8.1 --- Contributions --- p.100 / Chapter 8.2 --- Discussions --- p.102 / Chapter 8.3 --- Future Work --- p.103 / Bibliography --- p.105

First, we investigate the steady Euler flows through a general 3-D axially symmetric infinitely long nozzles without irrotationality. Global existence and uniqueness of subsonic solution are established, when the variation of Bernoulli's function in the upstream is sufficiently small and mass flux has an upper critical value. / Second, we concerns the following transonic shock phenomena in a class of de Laval nozzles with porous medium posed by Courant-Friedrichs: Given a appropriately large receiver pressure pr, if the upstream flow is still supersonic behind the throat of the nozzle, then at a certain place in the diverging part of the nozzle a shock front intervenes and the gas is compressed and slowed down to subsonic speed. The position and the strength of the shock front are automatically adjusted so that the end pressure at the exit becomes pr. We investigate this problem for the full Euler equations, the stability of the transonic shock is proved when the upstream supersonic flow is a small steady perturbation of the uniform supersonic flow and the corresponding pressure at the exit has a small perturbation. / Duan, Ben. / Adviser: Zhouping Xin. / Source: Dissertation Abstracts International, Volume: 73-01, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 125-137). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.

by Hao-min Zhou. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references. / Abstract --- p.1 / Introduction --- p.3 / Paper I --- p.8 / Paper II --- p.28

We have directed much attention towards developing quantum trajectory methods which can accurately predict the transmission probabilities for a variety of quantum mechanical barrier scattering processes. One promising method involves solving the complex quantum Hamilton-Jacobi equation with the Derivative Propagation Method (DPM). We present this method, termed complex valued DPM (CVDPM(n)). CVDPM(n) has been successfully employed in the Lagrangian frame to accurately compute transmission probabilities on 'thick' one dimensional Eckart and Gaussian potential surfaces. CVDPM(n) is able to reproduce accurate results with a much lower order of approximation than is required by real valued quantum trajectory methods, from initial wave packet energies ranging from the tunneling case (E[subscript o]=0) to high energy cases (twice the barrier height). We successfully extended CVDPM(n) to two-dimensional problems (one translational degree of freedom representing an Eckart or Gaussian barrier coupled to a vibrational degree of freedom) in the Lagrangian framework with great success. CVDPM helps to explain why barrier scattering from "thick" barriers is a much more well posed problem than barrier scattering from "thin" barriers. Though results in these two cases are in very good agreement with grid methods, the search for an appropriate set of initial conditions (termed an 'isochrone) from which to launch the trajectories leads to a time-consuming search problem that is reminiscent of the rootsearching problem from semi-classical dynamics. In order to circumvent the isochrone problem, we present CVDPM(n) equations of motion which are derived and implemented in the arbitrary Lagrangian-Eulerian frame for a metastable potential as well as the Eckart and Gaussian surfaces. In this way, the isochrone problem can be circumvented but at the cost of introducing other computational difficulties. In order to understand why CVDPM may give better transmission probabilities than real valued counterparts, much attention we have been studying and applying numerical analytic continuation techniques to visualize complex-extended wave packets as well as the complex-extended quantum potential. Numerical analytic continuation techniques have also been used to analytically continue a discrete real-valued potential into the complex plane for CVDPM with very promising results.

M. Tech. Electrical engineering. / Discusses the process of standing from a chair is the first movement to be affected by physical impairment or ageing. That justified the increase of researches around sit-to-stand movements nowadays.This thesis presents the design of a four links wearable device that can assist disable people to stand from a sitting position. The four links are joined at the ankle, the knee and the HAT (Head, Arm and Trunk) where actuators are mounted. The system is built around three controllers. The Goal Controller drives the links along their reference trajectories, the Stability Controller makes sure that the system does not collapse as it is rising, and the last controller combines the signal from the 2 first ones.The reference trajectories are obtained from data recorded from healthy people performing the movement. The main idea behind the present design is that from seat off, the floor projection of the body centre of pressure is evaluated and compared to the most stable position. The stability controller generates the torque necessary to compensate the deviation, while the third controller adjusts the level of participation of that torque to satisfy both the trajectory and the stability objectives. Similar idea was previously found in Prinz (2010).

No description available.

Thesis (Ph. D.)--University of Newcastle, 1999. / Department of Civil, Surveying and Environmental Engineering. Includes bibliographical references (leaves 246-255). Also available online.

Thesis (M.Sc.). / Written for the Dept. of Atmospheric and Oceanic Sciences. Title from title page of PDF (viewed 2008/12/10). Includes bibliographical references.

Thesis (Ph. D.)--Carleton University, 2004. / Includes bibliographical references (p. 259-274). Also available in electronic format on the Internet.