Controllable parameters in a power system include generator
terminal voltage, generator input power and network admittances.
These parameters can be controlled to damp
mechanical rotor oscillation in the generators and thereby
improve system transient stability. Explicit equations are
derived in this thesis for the control of these parameters to
introduce...
This paper describes a learning control system which is capable
of controlling a linear plant subjected to periodic inputs, providing
that an upper limit for the order of the plant is known. Otherwise the
characteristics of the plant and the inputs are unknown. Only one
system variable is measured. The...
In this thesis a method is presented for maintaining the left
ventricular wall stress of the human heart at a constant level during
the systole (active portion of the heart's cycle). This constant stress
level makes it possible to take isotonic measurements on the heart
muscles.
The left ventricle of...
An interactive man-hybrid computer algorithm is presented
for searching a set of dynamic system parameters which effect a
compromise between performance characteristics and give satisfactory
system sensitivity without any analytical calculations or a
priori indices of performance. The parameter search is conducted
in a real time design situation in which...
In certain cases in system modeling, parameter search problems
are complicated by the availability of scanty and corrupt physical
system data and a large number of model parameters. An algorithm
using man-machine interaction is presented to attack this type
of parameter search problem with the objective of efficiency in the...
Decimation and interpolation is shown to be an effective technique
for reducing the storage requirements for bandlimited time series.
Interpolation and decimation is theoretically developed using z-transform
theory and graphically interperted. A sequence of data acquired by sampling
a sonar signal is used to demonstrate the effects of decimation. Using...
A model reduction method for stable, linear, time-invariant,
continuous systems is critically studied. This
method, proposed by Prof. Ouyang, is based on the concept
of power dispersion and the least-squared estimation
technique. The reduced models obtained by this method retain
the stability of the stable, high order original systems and...
An adaptive pitch axis autopilot design procedure is presented. The
design procedure is applicable to both stable and unstable pitch axis models
and to those having nonminimum phase. The design approach assumes
the adaptive autopilot is activated after achieving level flight. It is shown a
rate-feedback compensator can be designed...
An electro-dynamic Magnetic Levitation vehicular system has been
modelled and studied. In practice, a MagLev vehicle will consist of a
number of cars which are mechanically coupled to each other. It is
reasonable to assume that each of these cars will be independently
controlled with the help of a supervisory...
A computer model simulating the electrical activity of muscles of the upper
arm during elbow motion is presented. The output of the model is an
Electromyographic (EMG) signal. System identification is performed on the EMG
signals using autoregressive moving average (ARMA) modelling. The calculated
ARMA coefficients are then used as...
The effectiveness of linear control of a planar manipulator is presented for
robot operation markedly exceeding the limits of linearity assumed in the design of
the linear controller. Wolovich's frequency domain pole placement algorithm is
utilized to derive the linear controller. The control scheme must include state
estimation since only...
Osteosarcoma (OS) is the most common primary bone tumor in both humans and dogs, occurring approximately 10 times more frequently in dogs. OS is a highly aggressive neoplasm with evidence of metastasis often found at the time of diagnosis. Long-term survival in afflicted dogs continues to remain low despite aggressive...
The dissertation concentrates on seismicity of the Blanco Transform Fault (BTF), a 350-km-long oceanic transform fault (OTF) in the northeast Pacific Ocean. I analyze data collected during the Blanco Transform Fault OBS experiment, which comprised of a 1-year deployment of 55 three-component seismometers co-located with differential pressure gauges on and...
We used data from Cascadia Initiative and Blanco Transform Fault Zone array of ocean bottom seismometers and hydrophone to look at the seismicity and specially depth of the Central Cascadia Continental Margin events. Events were detected and located automatically with Antelope software package (Boulder Real Time Technologies). We looked at...
We used data from Cascadia Initiative and Blanco Transform Fault Zone array of ocean bottom seismometers and hydrophone to look at the seismicity and specially depth of the Central Cascadia Continental Margin events. Events were detected and located automatically with Antelope software package (Boulder Real Time Technologies). We looked at...
Vaccination with Vibrio anguillarum by oral administration
during copper exposure and intraperitoneal injection prior to copper
exposure was employed to investigate the effects of copper upon survival
and the immune response of juvenile coho salmon (Oncorhynchus
kisutch). Following copper exposure the survivors were challenged
under natural conditions to V. anguillarum,...
Oregon Department of Fish and Wildlife trout broodstocks from Alsea, Cole Rivers, Klamath, Leaburg, Oak Springs, Roaring River and Willamette Fish Hatcheries were examined for the presence of myxosporidans. Wild fish collected from waters above these hatcheries were also examined. Seven species of myxosporidans were observed in the hatchery broodfish:...
The virulence of selected isolants of infectious hematopoietic
necrosis virus (IHNV) were differentiated and correlated with
electrophoretic mobilities of virion structural proteins by sodium
dodecylsulfate polyacrylamide gel electrophoresis. A type 1
electropherotype of IHNV was more virulent for kokanee salmon
(Oncorhynchus nerka) and a type 2 strain more virulent for...
A new Lactobacillus species is proposed to include 17 strains of a bacterium from rainbow (Salmo gairdneri) and cutthroat trout (Salmo clarki), and chinook salmon (Oncorhynchus tshawytscha). The bacterium was isolated most frequently from fish stressed by handling or spawn ing. Phenotypically, the strains belong to the family Lactobacillaceae and...
Monoclonal antibodies (Mabs) were produced against the
myxosporean parasite, Ceratomyxa shasta, and were characterized
by indirect immunofluorescent techniques, western blot analysis,
and immunoelectron microscopy. The resulting Mabs reacted
specifically with the trophozoite and sporoblast stages of the
parasite, but not with the mature spore, indicating that certain
antigens are stage-specific....
For the past six years a bacterial infection has been the cause
of large losses of adult, spawning, American shad (Alosa
sapidissima) in the Coos, Millicoma and Smith Rivers of Oregon.
There was a sizable commercial fishery for shad in these rivers
and losses of fish due to this infection...
Two examples of Pacific rim plate boundary deformation are presented. In the first
part of the thesis crustal models are derived for the northwestern part of the Vizcaino
block in California using marine seismic and gravity data collected by the Mendocino
Triple Junction Seismic Experiment. A northwest-southeast trending kink in...
On November 6, 1988, two strong earthquakes (Mw: 7.0 and 6.8) separated
by about 13 minutes occurred in Yunnan Province, China. The aftershocks located
by Kunming Telemetered Seismic Network form a lineament approximately 120 km
long and 20 km wide with the long dimension oriented approximately N30°W. The
epicenter of...
In this thesis, we present the first detailed, long-term seismotectonic studies of oceanic
ridge-transform systems. The proximity of the Juan de Fuca plate to a network of
broadband seismic stations in western North America provides a unique synergy of
interesting tectonic targets, high seismicity, and recording capabilities. Our main tools...