18,340 research outputs found
Limiting velocities as running parameters and superluminal neutrinos
In the context of theories where particles can have different limiting
velocities, we review the running of particle speeds towards a common limiting
velocity at low energy. Motivated by the recent OPERA experimental results, we
describe a model where the neutrinos would deviate from the common velocity by
more than do other particles in the theory, because their running is slower due
to weaker interactions.Comment: 5 pages, 3 figure
Gauge non-invariance as tests of emergent gauge symmetry
We motivate the concept of emergent gauge symmetry and discuss ways that this
concept can be tested. The key idea is that if a symmetry is emergent, one
should look for small violations of this symmetry because the underlying
fundamental theory does not contain the symmetry. We describe our recent work
implementing this idea in the gravity sector. We also describe the reasons why
violations of gauge symmetry may well be linked to violations of Lorentz
invariance.Comment: 5 pages, Invited talk presented at the Fifth Meeting on CPT and
Lorentz Symmetry, Bloomington, Indiana, June 28-July 2, 201
Residual theory, partial adjustment, and information content on dividend payments decisions : an integration and extension / BEBR No. 760
Bibliography: p. 31-32
Support Vector Regression Based S-transform for Prediction of Single and Multiple Power Quality Disturbances
This paper presents a novel approach using Support Vector Regression (SVR) based
S-transform to predict the classes of single and multiple power quality disturbances in a
three-phase industrial power system. Most of the power quality disturbances recorded in an
industrial power system are non-stationary and comprise of multiple power quality
disturbances that coexist together for only a short duration in time due to the contribution
of the network impedances and types of customers’ connected loads. The ability to detect
and predict all the types of power quality disturbances encrypted in a voltage signal is vital
in the analyses on the causes of the power quality disturbances and in the identification of
incipient fault in the networks. In this paper, the performances of two types of SVR based
S-transform, the non-linear radial basis function (RBF) SVR based S-transform and the
multilayer perceptron (MLP) SVR based S-transform, were compared for their abilities in
making prediction for the classes of single and multiple power quality disturbances. The
results for the analyses of 651 numbers of single and multiple voltage disturbances gave
prediction accuracies of 86.1% (MLP SVR) and 93.9% (RBF SVR) respectively.
Keywords: Power Quality, Power Quality Prediction, S-transform, SVM, SV
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