Now showing items 1-10 of 1360
Frequency and Damping Characteristics of Generators in Power Systems
(Virginia Tech, 2018-01-25)
A power system stability is essential for maintaining the power system oscillation frequency within a small and acceptable interval around its nominal frequency. Hence, it is necessary to study and control the frequency ...
Examination of Power Systems Solutions Considering High Voltage Direct Current Transmission
(Virginia Tech, 2015-10-05)
Since the end of the Current Wars in the 19th Century, alternating current (AC) has dominated the production, transmission, and use of electrical energy. The chief reason for this dominance was (and continues to be) that ...
Synchronization of chaotic circuits through real channels
(Virginia Tech, 1994-04-18)
Chaotic encryption is currently a popular topic in technical journals. A number of articles have been written proposing novel methods of encrypting data using chaotic signals. Most of the encryption schemes rely on the ...
Model order reduction of linear dynamic systems with application to power system control
(Virginia Polytechnic Institute and State University, 1974)
Receiver-Assigned CDMA in Wireless Sensor Networks
(Virginia Tech, 2018-05-23)
A new class of Wireless Sensor Networks (WSNs) is emerging within the Internet of Things (IoT) that features extremely high node density, low data rates per node, and high network dependability. Applications such as ...
Single-switch three-phase zero-current-transition rectifier with power factor correction
(Virginia Tech, 1994-06-26)
<p>A novel, zero-current-transition (ZCT) topology of the single-switch three-phase boost PFC rectifier is proposed. The soft transition is achieved with a low-power auxiliary circuit employing an additional switch. The ...
Sapphire optical fiber sensors
(Virginia Tech, 1991-05-05)
<p>Fiber optic sensors offer many advantages over conventional sensors, including; small size, low weight, high strength and durability. Standard silica optical fibers are limited by the material properties of silica. ...
Quantization of color images using the modified median cut algorithm
(Virginia Tech, 1992-09-21)
<p>Many digital display devices allow only a limited number of colors to be displayed concurrently. Digitized color images typically contain several hundred to several thousand different colors. If these color images are ...
Optical display of the Airy function and transient wave propagation in a dispersive medium
(Virginia Tech, 1996-05-15)
<p>The display of an Airy function via an optical image processing technique is demonstrated. Using a two-dimensional object with a cubic amplitude transmittance, one can observe a Fourier transformed image of which intensity ...
Interfacing VHDL performance models to algorithm partitioning tools
(Virginia Tech, 1996-07-08)
Performance modeling is widely used to efficiently and rapidly assess the ability of multiprocessor architectures to effectively execute a given algorithm. In a typical design environment, VHD L performance models of ...