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 13 of 13 for “"local measurement"”.
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Local measurement of the pulse wave velocity using Doppler ultrasound
… disease. Several methods focus on the measurement of pulse wave velocity, the velocity at which the pressure wave propagates, because it is directly related to arterial stiffness. The objective of this project is to investigate the feasibility of measuring local pulse wave velocity from …
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A Local Measurement Based Protection Methodology for Initiating Controlled Islanding in Power Systems
… to solve this aspect are based on wide area measurement system (WAMS), which are either offline (Decision Tree) based that require time-consuming periodic offline simulation, or real-time based using a computationally intensive algorithm. The complexity in most of the real-time methods is due …
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Experimental investigation of two-phase instability in natural circulation with direct transient local measurement
… above the heated section. Direct transient local measurement of two-phase flow is performed at multiple axial locations along the flow channel with thermocouples and conductivity probes traversed by customized high-precision mechanisms. Periodic oscillation is captured when the vapor quality …
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On the Statistical Nature of Boiling Flows - an Experimental Approach
… were used for the pressure fluctuation measurements, and a linearized dual-beam x-ray system was used for the vapor fraction measurements. Steady state (mean) thermal-hydraulic condition in the last section was determined by an analytical model and verified to a certain extent by …
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The evolution of the large scale structure of the universe since z=1
… are calculated for different redshift bins, as local measurement the LCRS data is used. To facilitate the direct comparison of the two surveys, the influence of the redshift errors on the projected correlation function have to be taken into account. For evolution of the clustering strength the …
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Rotation studies in fusion plasmas via imaging X-ray crystal spectroscopy
… capable of making spatially resolved measurements has been designed, built, installed and operated on the Alcator C-Mod tokamak. By taking advantage of toroidal symmetry and magnetic flux surface mapping it is possible to perform spectral tomography with a single fan of views. This …
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Robust decentralized control of power systems through excitation systems and thyristor controlled series capacitors
… a range of operating conditions, for evaluating local signals.;Two case studies are performed to explain and demonstrate the effectiveness of the proposed methodologies. The first power system is the two-area four-machine inter-area oscillation benchmark system. The second is the western U.S. …
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Manipulative Scanning Tunneling Microscopy and Molecular Spintronics
… interactions due to its capabilities of local measurement of spectroscopic, magneto-electric, and topographic properties in real-space with sub-nanometer resolution. Still, many physical and chemical effects have yet to be completely characterized and understood. This dissertation …
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Experimental investigations of oxygen-separating ion transport membranes for clean fuel synthesis
… experimental challenges. Specifically, the local gas compositions at both the high oxygen (air) and low oxygen (sweep) surfaces influence the oxygen flux: these experimental measurements have not been available until now. A novel ITM research reactor has thus been developed which can …
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Hierarchical Decentralized Control for Enhanced Stability of Large-Scale Power Systems
… systems consisting of `prosumers' and localized energy markets, decentralized control methods in power systems are gaining a growing attention among power researchers. Traditionally, two main types of control schemes have been implemented in power systems: (a) wide-area monitoring based …
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Deep learning for islanding detection of grid-connected photovoltaic systems
… on identifying the islanding features in the local measurement of the voltage and current signals, which needs to be fed to the machine learning algorithms that have been proposed in the literature. However, identifying such features a priori is a very complex task in particular when …
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Multi-scale electrical and thermal properties of aligned multi-walled carbon nanotubes and their composites
… Benchmark electrical and thermal property measurements of A-CNT-PNCs were obtained using complementary bulk and local measurement techniques, with clear structure-property relations due to the controlled, quantified, and non-isotropic CNT morphology. The data were interpreted using both …
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Improving the accessibility of in-stream water wheels
… the fluid environment is important both from a local ecological impact perspective and due to the potential impact of the turbine wake on downstream turbine installations. This study characterised the three-dimensional topology of the wake of an in-stream water wheel, providing some quantitative …