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 14 of 14 for “"Power variation"”.
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Identifying jumps in financial time series: a comparative study of jump detection tests
… jump detection tests. In particular, the multi-power variation tests of BarndorffNielsen and Shepard (2004, 2006) and Andersen et al. (2004), the minimum and median variance tests of Andersen et al. (2009), the threshold multi-power variation test of Corsi et al. (2010), the instantaneous …
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Mitigating variability in HPC systems and applications for performance and power efficiency
Power consumption and process variability are two important, interconnected, challenges of future generation large-scale High Performance Computing (HPC) data centers. For example, current production petaflop supercomputers consume more than 10 megawatts of machine and cooling power that costs …
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DEVELOPMENT OF DEM-BASED METHOD FOR MAPPING STREAM POWER DISTRIBUTION OF SOUTHERN ONTARIO STREAMS
Mapping of stream power along a stream system, a known determinant of channel form and dynamics, is a valuable component of geomorphic stream assessment procedures that, unlike current methods, is physically-based, time- and cost-effective, objective and repeatable. Continuous maps of stream power …
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A Technique for Evaluating the Uncertainties in Path Loss Predictions Caused by Sparsely Sampled Terrain Data
… propagation models provide an estimate of the power loss in a communication link caused by the surface of the ground, atmospheric refraction, foliage, and other environmental factors. Many of the models rely on digital topographic databases to provide information about the terrain, and …
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Analysis of variation in on-chip waveguide distribution schemes and optical receiver circuits
… scales because of its potential to overcome power, delay, and bandwidth limitations of traditional electrical interconnect. This thesis examines the issues of variation involved in the implementation of a robust on-chip optical signal distribution network. First, the variation within the …
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Designs for ultra-high efficiency grid-connected power conversion
Grid connected power conversion is an absolutely critical component of many established and developing industries, such as information technology, telecommunications, renewable power generation (e.g. photovoltaic and wind), even down to consumer electronics. There is an ever present demand to …
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Software Protection Against Fault and Side Channel Attacks
… chance of revealing it by simply looking at the power variation. Additionally, an adversary can tamper with an embedded system's environment to get it to skip a security check or generate side channel information. Any adversary with physical access to an embedded system can conduct such …
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Computer model of hybrid compensator of fast varying loads
… systems were described in this dissertation. The power properties of fast varying loads were expressed in terms of the Currents' Physical Components Theory. Therefore, the Currents' Physical Components Theory was applied to systems with non-periodic voltages and currents. The supply current of the …
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Modelling and control of a floating oscillating water column
… the interdependencies of the different power conversion systems rather than modelling each system individually. This was achieved by accounting for the dynamic aerodynamic damping caused by the changing turbine rotational velocity by recalculating the turbine damping for each simulation …
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Mitigating interference coexistence issues in wireless sensor networks
… an incoming transmission, or be left in a power efficient sleep state. Current CCA implementations cannot determine the device type occupying the media, leaving nodes unable to differentiate between WSN traffic and arbitrary interference from other devices, such as WiFi. This affects link …
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The Modeling and Advanced Controller Design of Wind, PV and Battery Inverters
Renewable energies such as wind power and solar energy have become alternatives to fossil energy due to the improved energy security and sustainability. This trend leads to the rapid growth of wind and Photovoltaic (PV) farm installations worldwide. Power electronic equipments are commonly employed …
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Design of Microwave Front-End Narrowband Filter and Limiter Components
… from intentional and unintentional high-power microwave (HPM) sources. This is of interest because many commercial microwave communications and sensor systems are unprotected from high power levels. Novel technologies to harden front-end components must maintain existing system …
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Thermo-Hydraulic Performance of Partially Blocked Metal-Foam Channels
… is the attendant higher pressure drop or pumping power penalty. This thesis was undertaken to investigate whether channels partially filled with metal foams can reduce the required pumping power with a minimal loss in thermal performance. The thermo-hydraulic (T-H) performance factor J/F<sup>1/3, …