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 130 for “"stage design"”.
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Bayesian Two Stage Design Under Model Uncertainty
Traditional single stage design optimality procedures can be used to efficiently generate data for an assumed model y = f(x<sup>(m)</sup>,b) + ε. The model assumptions include the form of f, the set of regressors, x<sup>(m)</sup> , and the distribution of ε. The nature of the response, y, often …
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Cooling system early-stage design tool for naval applications
… thesis utilizes concepts taken from the NAVSEA Design Practices and Criteria Manualfor Surface Ship Freshwater Systems and other references to create a Cooling System Design Tool (CSDT). With the development of new radars and combat system equipment on warships comes the increased demand for the …
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Assessing Early Stage Design Sketches and Reflections on Prototyping
Designers routinely create informal “thinking” sketches to explore a design space, “talking” sketches to communicate design ideas during the early phases of the design process, and “learning” prototypes to test potential concepts. This study presents two new tools to assess novice designers’ sketch …
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Minimising embodied carbon in buildings: Uncertainty during early-stage design
… (ECCs). This is particularly true during early-stage design when the specific material selection is still unknown. A common early-stage technique for identifying embodied carbon reduction strategies is identifying carbon hotspots. However, these hotspots can be heavily influenced by the large …
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A tool for evaluating the early-stage design of corvettes
… is a trend in the ship building industry to design new ships as corvettes [1] since they can operate both independently and in joint missions. However, it is difficult for a naval architect to manage all the information flow throughout the corvette design process. When the displacement of the …
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Early-Stage Design Space Exploration Tool for Neural Network Inference Accelerators
Permanent URL: https://doi.org/10.7936/K7862FV4
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Simulation approaches to support composite laminate analysis from early stage design
… for 3D analysis of composite laminates at early design stages, i.e. when design data is limited. To address this a novel analysis method, referred to here as the internally smeared method, was developed and tested. The internally smeared method models the plies on the outer surfaces in full, with …
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Designing for forces : an early-stage design program for axial-force structures
… However, they are not as straightforward to design since the forces in the structure depend on shape. The traditional method of form finding for such axial force structures is to create physical hanging models. These models are slow to produce and difficult to measure. Few digital design aids …
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Assessing Impacts of Digital Sketching on Concept Generation in Early Stage Design
Digital design tools have become increasingly popular for facilitating designers with different steps of the design process because they can simplify or automate certain components of these steps. Computer Aided Design (CAD) tools have assisted designers with tasks such as modeling and visualizing …
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A Parametric Model for Predicting Submarine Dynamic Stability in Early Stage Design
… can be used in the concept exploration phase of design. The purpose of the module is to determine the hydrodynamic coefficients/derivatives and stability characteristics of a given design. Two tools, GEORGE and CEBAXI and LA_57, were used to model a submarine, calculate its hydrodynamic …
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OPERATIONAL ANALYSIS AND EARLY-STAGE DESIGN FOR NEXT GENERATION MCM THROUGH DIGITAL ENGINEERING
… conducted an operational analysis to inform the designs of future mine countermeasures (MCM) ships. This was primarily focused on identifying the ship design characteristics that will have the largest impact on mine detection and classification. The research developed a systems architecture, …
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The vertical-mill stage : design of a vertical movement stage for surface machining
… must be reduced. The goal of this project is to design a machine for vertical axis movement which can be measured and controlled. The key issues addressed in this thesis, are the motion past obstacles in the extrusions, a lightweight mechanism that is stiff with minimal horizontal deflections, …
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Flexibility in early stage design of US Navy ships : an analysis of options
This thesis explores design options for naval vessels and provides a framework for analyzing their benefit to the Navy. Future demands on Navy warships, such as new or changing missions and capabilities, are unknowns at the time of the ship's design. Therefore, ships often require costly …
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High Frequency Inverter Power Stage Design Considerations for Non-Magnetic Materials Induction Cooking
… to deal with these issues through induction coil design, higher operating frequency and novel control strategy. Because of non-magnetic material's low resistivity and permeability characteristics, it is difficult to be heated and to achieve soft-switching while the coupling between the induction …
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A two-stage design framework for optimal spatial packaging of interconnected fluid-thermal systems
… limiting system sophistication and extending design timelines. Spatial packaging involves packing and routing, which are separately challenging NP-hard problems. Therefore, solving the coupled packing and routing (PR) problem simultaneously will require disruptive methods to better address …
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Switching Stage Design and Implementation for an Efficient Three-Phase 5kW PWM DC-DC Converter
… DC-DC topology offers benefits over standard designs. Passive component sizes and output ripple voltage were reduced as a result of an effective boost in switching frequency. Converter output voltage was reached more easily due to an increased transformer voltage boost ratio in addition to the …
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High-Efficiency Low-Voltage High-Current Power Stage Design Considerations for Fuel Cell Power Conditioning Systems
… power conditioning systems should be carefully designed. Low-voltage high-current systems require carefully designed PCB layouts and bus bars. The bus bar and PCB trace lengths should be minimized. Therefore, each needs to be designed with the other in mind. Excessive PCB and bus bar lengths can …
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Early-stage design and development of mine waste valorisation technologies with expert input: a case study of South African sulfide-enriched coal waste
… challenges and has thus far been limited. When designing processes for the application of large-volume mine waste, information deficits are encountered. This is largely because the characteristics of mine waste tend to be poorly understood or unknown as well as highly complex due to residual …
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Hierarchical and interactive parameter refinement for early-stage system design
… models are extensively used for detailed design analysis, their potential benefits for supporting early-stage design have not yet been harvested. This thesis presents a new design methodology, called Hierarchical and Interactive Decision Refinement (HIDER), which enables detailed …
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Vulnerability analysis of an all-electric warship
Traditional design processes usually rely on cost as the metric the designer uses to select among different alternatives. Sometimes when costs cannot be calculated we use weight, volume and efficiency as surrogates for cost. However minimizing costs does not necessarily give us the best design for …
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