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 545 for “"Stacked"”.
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Stacked switched capacitor energy buffer architecture
… major concern. This thesis presents a series of stacked switched capacitor (SSC) energy buffer architectures which overcome this limitation while achieving comparable effective energy density without electrolytic capacitors. The architectural approach is introduced along with design and control …
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Differential power processing for series-stacked processors
The series-stacked architecture provides a method to increase power delivery efficiency to multiple processors. With a series-stack, differential power processing (DPP) is needed to ensure that processor voltages remain within design limits as the individual loads vary. This work demonstrates a …
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Crushing characteristics of axially stacked square tubes
… consisting of single, welded and two axially stacked plate-divided mild steel square tubes were investigated by the performance of numerous quasi-static and dynamic axial crushing tests and FEM (finite element modeling). The simulation was carried out using the finite element package …
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Two-Dimensional Analysis of Stacked Geosynthetic Tubes
… levees. This thesis considers single and stacked geosynthetic tubes resting on rigid and deformable foundations. A two-dimensional analysis is performed on the cross-section of a very long tube. The program Mathematica is utilized for the analysis. A few assumptions are made regarding the …
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Stacked generalization for early diagnosis of Alzheimer's disease
… then used to train the ensemble system, based on stacked generalization algorithm, and individual decisions were calculated and compared. The ensemble decisions from individual data sources (specific electrode - stimuli - frequency band combinations) were combined using different data fusion …
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Stacked dense-hourglass networks for human pose estimation
… pose estimation. For this task, the Stacked Hourglass Networks (Stack-HgNets) is one of the state-of-the-art architecture that uses residual modules extensively as the basic building block. The residual modules are well recognized for creating shortcut connections, skipping one or …
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Stacked-Switched Electrolytic Capacitor-less AC/DC Power Converters
… AC/DC converter is proposed, utilizing a stacked-switch configuration to reduce voltage stress and operating in Discontinuous Conduction Mode (DCM) to achieve inherent power factor correction. Closed-loop control based on Variable Frequency Modulation (VFM) is used for voltage regulation, …
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Feasibility Study of an Axially-Stacked, Subsonic Propeller System
With the aerospace industry pushing for an increased production and application of unmanned aerial vehicles (UAVs), humans will increasingly become exposed to noise pollution emanating from above. Fortunately, electric motors have and will continue to gain an ever-prominent role in the power plant …
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Dry Stacked Surface Bonded Masonry - Structural Testing and Evaluation
The ENDURA block system is a dry-stack surface-bonded masonry system. Typical masonry construction uses thin-set mortar in the bed joints to provide a bearing surface for the blocks while the ENDURA system typically relies on shims and a surface bonding coat to ensure that the wall is level and …
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A stacked full-bridge microinverter topology for photovoltaic applications
… VRMS utility line. This thesis presents a new stacked full-bridge topology that improves upon the previous high-frequency inverter section. By utilizing new operating modes to reduce the reliance on frequency control and allowing for the use of lower blocking voltage transistors, the operating …
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Design, fabrication and testing of a stacked variable-reluctance motor
… type of variable-reluctance motor with axially stacked stator and rotor plates is explored in this thesis. This stacked variable-reluctance motor (SVRM) has mechanically parallel air gaps, carrying magnetic flux in series. Magnetic models are developed to predict the maximum and minimum flux …
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Evaluating the Displacement Modes and Associated Risks of Stacked Log Structures
… those associated with snow load, of historic stacked log structures at the Bar BC Ranch in Grand Teton National Park in preparation of a typology of displacement indicators and risk exposures that inform the development of a field survey to help building stewards monitor stacked log structures …
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Reliability evaluation of stacked die BGA assemblies under mechanical bending loads
This thesis presents a reliability evaluation of stacked die ball grid array (BGA) assemblies under mechanical bending loads. The test specimens used in this investigation were four die stacked BGAs assembled on printed circuit boards (PCBs) with eutectic tin-lead solder and gold over nickel …
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Magnetization of stacked high-Tc superconducting (HTS) tapes using flux pumping
Stacked commercial second generation (2G) high temperature superconducting (HTS) tapes has been demonstrated to have great field trapping ability, with superior mechanical, thermal properties and crossed-field performance to HTS bulks. HTS stacks are considered as a very promising candidate for …
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Development of enforced stacked intercalators that target trinucleotide repeat mismatches in DNA
… we proceeded to develop a series of enforced stacked intercalators. Our first approach involved utilizing a larger mismatch-recognition diaminopurine unit, as the described in the first part of Chapter 3. However, although selective for T–T and C–C mismatches, its nonspecific binding was not …
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Machine learning for well rate estimation : integrated imputation and stacked ensemble modeling
This thesis describes a stacked ensemble, supervised machine learning problem for well rate estimations utilizing well test features that are far from independent and identically distributed (IID), and exhibit missing data with a not missing at random (MNAR) classification from three different oil …
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Optical spectroscopy study of correlated electron physics in ABC-stacked trilayer graphene
In recent years, people use 2D material as a building block to fabricate all kinds of multilayer stack devices, some of which host strongly correlated physics such as twist bilayer graphene and ABC-stack trilayer graphene. Mott insulator and superconductivity are found in these systems, which …
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Architectures for individual and stacked micro single chamber solid oxide fuel cells
Solid oxide fuel cells (SOFCs) are electrochemical conversion devices that convert various fuel sources directly into electrical energy at temperatures ranging from 600°C to 1000°C. These high temperatures could potentially allow the direct use of various hydrocarbon fuel sources and hydrogen, …
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