Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"Geometric Programming"”.
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Optimal drilling parameters via geometric programming
Includes bibliographical references.
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Structural Optimization Using Geometric Programming and the Integrated Formulation
… solved as a large scale nonlinear mathematical programming problem. In contrast to current methods of optimization where analysis and design are separated into two distinct phases, the integrated approach does not distinguish between the two activities. Because of the large size of the resulting …
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Conceptual engineering design and optimization methodologies using geometric programming
Geometric programs (GPs) and other forms of convex optimization have recently experienced a resurgence due to the advent of polynomial-time solution algorithms and improvements in computing. Observing the need for fast and stable methods for multidisciplinary design optimization (MDO), previous …
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A geometric programming based procedure to design bridge superstructures
… view. Thus, application of suitable mathematical programming techniques to determine optimal designs can result in tremendous savings. In this thesis, a procedure based on Generalized Geometric Programming (GGP) is developed to optimally design and select bridge superstructures. The bridge …
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Geometric programming approach to the preliminary design of wastewater treatment plants, A
Includes bibliographical references (pages 150-153).
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Integrated Optimal Design of Structures Subjected to Alternate Loads Using Geometric Programming
A parallel decomposition for two or more alternative loading conditions in the integrated optimum structural design is investigated. The method developed, called move coordination, consists of formulating the large optimization problem in the form of smaller subproblems based on the load …
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Solar-electric and gas powered, long-endurance UAV sizing via geometric programming
… battery, and other component performance. Using geometric programming, models capturing the interaction between disciplines are used to analyze the feasible limits of solar-electric and gas powered, long-endurance aircraft in seconds to a level of detail and speed not previously achieved in …
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Geometric programming algorithm for solving a class of nonlinear, signomial optimization problems, A
Includes bibliographical references (pages 49-52).
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A heuristic for including black box analysis tools into a geometric programming formulation
Recently, geometric programming has been proposed as a powerful tool for enhancing aircraft conceptual design. While geometric programming has shown promise in early studies, current formulations preclude the designer from using black box analysis codes which are prolific in the aircraft design …
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Generalized condensation algorithm for the solution of unconstrained balanced posynomial problems using geometric programming, A
Includes bibliographical references.
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Geometric programming algorithm for the solution of Cobb-Douglas production functions of degree one, A
Includes bibliographical references (pages 65-66).
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Analog circuit optimization using evolutionary algorithms and convex optimization
… is a contribution. We argue that the accuracy of geometric programming can be improved without adversely influencing the run time or increasing the designer's effort. This is facilitated by decomposition of geometric programming modeling into two steps, which decouples accuracy of models and …
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Signomial programming for aircraft design
… and tractable solution techniques can be used. Geometric programming, an example of one such technique, guarantees finding a globally optimal solution. Although it has been shown that geometric programming can be used to solve some conceptual aircraft design problems, the required formulation …
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A hierarchical bottom-up, equation-based optimization design methodology
… Keywords: System design, optimization, geometric programming, analog circuits, Pareto-optimal.
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Development of an Accurate Clock Delay Model with Application in Clock Network Buffer Sizing
… makes it a suitable option for application in geometric programming gate and clock network sizing optimization frameworks. The experimental results demonstrate the effectiveness of the proposed delay model in predicting the delay at the timing critical clock sinks in the clock network, i.e. …
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Design Studies for Future EAD-Propelled Aircraft
… is based on aircraft parameters produced by a geometric programming aircraft design optimizer. This thesis presents an experimental campaign to validate and improve models used by the optimizer. Models of interest are mass, drag, electrical, and structural. Preliminary experiments involve wing …
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Aerospace composite manufacturing cost models as geometric programs
… during the conceptual design phase using Geometric Programming (GP). A new formulation of a closed queuing network as a GP is presented to capture the crucial cost trade-offs between capacity and inventory. Additionally, GP models are presented for modeling unit processes in composite …
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An analysis of posynomial MOSFET models using genetic algorithms and visualization
… which automate the process of circuit sizing. Geometric programming, which uses posynomial models of MOSFET parameters, represents one such tool. Genetic algorithms have been used to evolve posynomial models for geometric programs, with a reasonable mean error when modeling MOSFET parameters. …
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Wingsail design methodology and performance evaluation metrics for autonomous sailing
… design optimization framework that leverages geometric programming to efficiently generate optimal wingsail designs. The proposed methodology is then validated through the development and deployment of a bespoke wingsail data acquisition system called the WingDAQ, which enables quantitative …
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