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Now showing items 241-250 of 278
Design and Implementation of Digital Current Mode Control
(2015-05-11)
Presented in this dissertation are three digital control methods of current mode control for switch-mode power supplies. Both the current and voltage loop are implemented on the digital processor. Digital versions of peak ...
Designs of Substrate Integrated Waveguide (SIW) and Its Transition to Rectangular Waveguide
(2015-05-11)
There has been an ever increasing interest in the study of substrate integrated waveguide (SIW) since 1998. Due to its low loss, planar nature, high integration capability and high compactness, SIW has been widely used to ...
Note Detection and Multiple Fundamental Frequency Estimation in Piano Recordings
(2015-12-10)
Automatic music transcription (AMT) is a difficult signal processing problem, which has, in the past decade or two, begun to receive proper treatment. An overview of the problem with a focus on the nature of music signals ...
Secure Design Considerations for Embedded Systems
(2015-12-04)
A guide is presented for embedded system designers that details secure design considerations for modern embedded systems. The guide focuses on adapting traditional software design practices to include adapted methodologies ...
Power Control for Underlay Cognitive Radio Networks with Full-duplex Transmissions
(2014-03-31)
Radio communication, one of core contents in wireless communication, is facing a great crisis of running out of resource. Unlike other energy crisis which can be solved by using all kinds of alternative energy, the only ...
Optimization of High Power Gallium Nitride Based Point of Load Converters for Data Center Power Supply Chains
(2015-04-30)
Wide-bandgap semiconductors are enabling higher efficiency, greater power density, smaller size, and higher switching frequency than traditional Si semiconductors. This work shows the development of an over 96% efficient ...
A Method to Discriminate Between Flicker Sources
(2015-07-29)
This work is a discussion on discriminating between multiple flicker producing sources that are connected electrically close together in the power system. IEC 61000-4-15 provides a thorough description on how to build a ...
Fast Estimation of Specific Absorption Rate for Magnetic Resonance Imaging
(2015-07-02)
Specific absorption rate (SAR) is a main safety concern in magnetic resonance imaging (MRI). The radio frequency (RF) power deposition and SAR level have a significant impact on RF coil and pulse design. In high field MRI, ...
Algorithms for Optimal Energy Management in the Smart Grid
(2015-07-02)
Smart grid (SG) is regarded as the next generation power grid, which implements an innovative idea for a highly automated and integrated power system.
The two-way energy and information flows in the SG, together with the ...
Motion Estimation from Tagged MR Images and Application to Cardiac Strain Evaluation and Functional Analysis of Ocular Tissues
(2015-09-23)
Tagged MRI is a magnetic resonance imaging technique that has been widely applied to tissue functional evaluation, especially the myocardium. Unlike traditional anatomical imaging methods, tagged MRI spatially encodes the ...