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.
Results
Showing 1 to 20 of 1042 for “"twin"”.
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TWIN TALK
… of naturally occurring conversations between twin siblings. This study uses both conversation analysis and semi-structured interviews to investigate communication patterns and practices in everyday twin-to-twin talk. The following research questions guided this study: (1) What pragmatic …
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Coaxial contrarotating twin rotor aerodynamics
The modelling of a Coaxial Contrarotating Twin Rotor (CCTR) system has been developed from single rotor modelling techniques. Particular attention has been paid to the characteristics of the tip vortex, namely, vortex strength, structure and decay. Equations are presented which describe both the …
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Subsurface Digital Twin and Emergence
… investigates the concept of a subsurface digital twin as a boundary object that bridges disciplines, scales, and uncertainties, fostering collaboration and real-time informed decision-making. It explores the evolution of subsurface characterization from data-sparse and theory-dependent practices …
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Uncovering the link between twin-twin interactions and damage nucleation in an (α+β) Ti alloy
… these damage incidents occurring along {10̅12} twin-twin boundaries with a ~60° misorientation. The {10̅12} twinning mode is only activated in the localized neck, and twin activation is strongly dependent on initial crystallographic texture. The twinned domains are rotated such that prismatic …
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Digital Twin Platform for Drone Applications
Simulation tools and digital twins are vital to UAV research, enabling efficient prototyping, testing, and deployment of algorithms in dynamics, control, computer vision, and deep learning. Despite their importance, existing simulators face limitations in modularity, scalability, and …
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Analysis of a twin-spherical motor
… dissertation derives equations representing a twin-spherical motor. Basic ideas and some papers are reviewed, and the analysis begins with the derivation of current density waveforms for each geometry of slots and windings. From these current densities, flux densities are found analytically by …
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Preliminary design of twin-cylinder engines
… report deals with the preliminary design of a twin-cylinder engine. The goal of the work is not to make the detailed design of the engine but to draw the main characteristics of each kind of engine and to investigate which configuration of twin-cylinder engine matches in the best way to given …
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Clearance management in twin screw compressors
Although the performance of twin screw compressors is heavily dependent on the rotor clearances within them, chamber models, used as design aids, allow for the specification of their magnitude and distribution but do not account for how these may vary during operation, as a result of internal …
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Digital Twin Modeling for NV Magnetometry
… the development and application of a digital twin modeling framework for nitrogen-vacancy (NV) center-based magnetometry, advancing the field of quantum sensing. A surrogate model serves as a computational representation of the physical NV magnetometer system, enabling comprehensive …
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Routing methods for twin-trailer trucks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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Digital Twin for Photovoltaic System Maintenance Support
… This thesis presents a modular, holonic digital twin (DT) architecture for maintenance support of industrial PV plants. The proposed architecture integrates rule-based and machine-learning-based (ML) failure analysis within a unified structure, enabling both real-time fault detection and …
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Techniques and Technologies for Earth-twin Discoveries
… are aimed at aiding the discovery of an ‘Earth-twin’ exoplanet. In the context of this work, I use the term Earth-twin to mean an Earth-massed rocky planet orbiting a Sun-like star at a period of around 300 days. I created a pipeline prototype for fitting planetary models to radial velocity (RV) …
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Twin cities : cyberspatial qualities of contemporary Tokyo
The cityscape of contemporary Tokyo is undergoing a dramatic transformation caused by a proliferation of technology, such as the rapid mass transit network and the advanced telecommunication system. On the one hand conventional urban design criteria such as physical proximity and spatiotemporal …
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Feasibility of a Human Capital Digital Twin
… technological advances to create digital twins of important company assets, which provide unprecedented visibility into the state of these assets and can significantly improve the ability to manage them. This thesis asks if it is possible to apply those cutting-edge engineering tools …
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Digital Twin Technology Applied to Automotive Diagnostics
… a lot of interest in the area of Digital Twin (DT) Technology. Physical product oriented organizations are increasingly looking for ways to stay ahead of the technological innovation curve in order to not get disrupted by more agile entrants. Therefore, the promise of a technology like DT …
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Twin-image problems in optical scanning holography
… second part of this dissertation investigates twin-image noise in optical scanning holography. In optical scanning holography, holographic information of an object is generated by 2-D active optical scanning. The optical scanning beam can be a time-dependent Gaussian apodized Fresnel zone …
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