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Lumping Processes of Periodic ARMA Processes
(
Qatar University
, 2004 , Article)
In this article various lumping processes are defined for periodic ARMA (PARMA) processes, namely, the forward, the backward and the cyclic lumping processes. The inter-relations between the parameters of these lumping ...
Identification of individual types of harmonic loads in an electric power system bus
(
Elsevier
, 2004 , Article)
Some buses in a power system feed power to loads that are sources of harmonics. This type of bus is called a complex bus. This paper provides a new application of the constrained least absolute value algorithm (LAV) to ...
Power system frequency estimation based on simulated annealing: A variable frequency model
(
Sharif University of Technology
, 2004 , Article)
This paper presents a new technique for measuring power system frequency, rate of change of frequency and the voltage amplitude and phase angle using the Simulated Annealing (SA) based optimization algorithm. The algorithm ...
Effect of octylphenol polyethylene oxide on the corrosion inhibition of steel in 0.5 M H2SO4
(
Elsevier
, 2004 , Article)
A non-ionic surfactant, octylphenol polyethylene oxide (OPPEO), was evaluated as an inhibitor for corrosion of low-carbon steel in 0.5M H 2SO4. Potentiodynamic and potentiostatic methods and scanning electron microscopy ...
Harmonic modeling of linear and nonlinear loads based on Kalman filtering algorithm
(
Elsevier
, 2004 , Article)
Most harmonic nonlinear load modeling techniques developed in the last two decades, assume that the load connected to the load bus has a constant admittance, inductive or capacitive, which depends on the mode of operation ...
Spectrophotometric Determination of Hydrogen Peroxide by a Hydroquinone-Aniline System Catalyzed by Molybdate
(
Korean Chemical Society
, 2004 , Article)
In this system hydroquinone is oxidized to pbenzoquinone by H2O2. 2 aniline are added, in successive stages, to pbenzoquinone, to yield the disubstituted quinone as the final product. 20 The UV-VIS spectrum of the product ...
Halul and Sharao islands, offshore Qatar: Remnants of the great infracambrian Hormuz Salt basin
(
springer link
, 2004 , Article)
Halul and Sharao islands, offshore Qatar, are among more than 200 islands in the Gulf region, which are believed to have formed by salt diapirism sourced in the Infracambrian Hormuz Salt Series. The islands are composed ...
Prevention of gallium arsenide photocorrosion by an epoxy adhesion layer
(
Elsevier Ltd
, 2004 , Article)
Coating of gallium arsenide with an adhesion layer of commercial epoxy prevented its photocorrosion. A two-component room temperature curing adhesive paste (Araldite 2014) has been selected. When GaAs/Araldite was employed ...
A new digital transformation for harmonics and DC offset removal for the distance fault locator algorithm
(
Elsevier
, 2004 , Article)
This paper presents a new application of Park's transformations to identifying the positive sequence of the fundamental components of the three-phase voltage or current signals needed for fault locator algorithm. The problem ...
Reduction kinetics of ceria surface by hydrogen
(
Wiley Periodicals, Inc.
, 2004 , Article)
Powdered cerium dioxide (ceria, CeO2) as compressed, sintered pellets, of porosity 16.4% and density 5.99 g cm−3, were treated in hydrogen flow at 1 atm and various temperatures to effect reduction. The electrical conductivity ...