Now showing items 1-10 of 149
A feasibility study on using CT image analysis for hardwood log inspection
(Virginia Tech, 1993)
Core loss characterization and design optimization of high-frequency power ferrite devices in power electronics applications
(Virginia Tech, 1992-03-30)
An impedance-based core loss measurement technique for power ferrites, the modeling and analysis of mechanisms of high-frequency losses, and design methodology for optimization for high-frequency magnetics are presented. The ...
Properties and sensing applications of long-period gratings
(Virginia Tech, 1996-11-06)
A long-period grating is obtained by introducing a periodic refractive index modulation in the core of a hydrogen-sensitized germanosilicate fiber. The phase-matching condition causes light from the fundamental guided mode ...
A new method to calculate wave scattering from rough surfaces at low grazing angles
(Virginia Polytechnic Institute and State University, 1995)
Hierarchical test generation for CMOS circuits
(Virginia Tech, 1992-03-05)
As advances in very large scale integration (VLSI) technology lead to higher levels of circuit integration and new design styles and fabrication processes, traditional test generation techniques fail to adequately address ...
Adaptive Predictive Feedback Techniques for Vibration Control
(Virginia Tech, 1998-02-03)
In this dissertation, adaptive predictive feedback control is used to suppress plate vibrations. The adaptive predictive controller consists of an on-line identification technique coupled with a control scheme. Various ...
A Power Conditioning System for Superconductive Magnetic Energy Storage based on Multi-Level Voltage Source Converter
(Virginia Tech, 1999-07-06)
A new power conditioning system (PCS) for superconductive magnetic energy storage (SMES) is developed and its prototype test system is built and tested. The PCS uses IGBTs for high-speed PWM operation and has a multi-level ...
Robust Statistical Methods for Measurement Calibration in Large Electric Power Systems
(Virginia Tech, 1997-10-13)
The Objective of the Remote Measurements Calibration (RMC) method is to minimize systematic errors through an appropriate scaling procedure. A new method for RMC has been developed. This method solves the problems ...
Extended describing function method for small-signal modeling of resonant and multi-resonant converters
(Virginia Tech, 1994)
The extended describing function method is proposed as a systematic small-signal modeling approach to nonlinear switching circuits. This method offers significant simplification upon the previous work on using the ...
Design of Integrated, Low Power, Radio Receivers in BiCMOS Technologies
(Virginia Tech, 1995-12-01)
Despite increasing levels of integration in modern electronic products, radio receiver designs continue to rely on discrete LC, ceramic, and electro-acoustic devices for the realization of RF and IF bandpass filtering. ...