Search results for "methods"
showing 10 items of 4526 documents
Semi-supervised deep learning-driven anomaly detection schemes for cyber-attack detection in smart grids
2022
Modern power systems are continuously exposed to malicious cyber-attacks. Analyzing industrial control system (ICS) traffic data plays a central role in detecting and defending against cyber-attacks. Detection approaches based on system modeling require effectively modeling the complex behavior of the critical infrastructures, which remains a challenge, especially for large-scale systems. Alternatively, data-driven approaches which rely on data collected from the inspected system have become appealing due to the availability of big data that supports machine learning methods to achieve outstanding performance. This chapter presents an enhanced cyber-attack detection strategy using unlabeled…
Contribution of recently measured nuclear data to reactor antineutrino energy spectra predictions
2013
This paper attempts to summarize the actual problematic of reactor antineutrino energy spectra in the frame of fundamental and applied neutrino physics. Nuclear physics is an important ingredient of reactor antineutrino experiments. These experiments are motivated by neutrino oscillations, i.e. the measure of the θ 13 mixing angle. In 2011, after a new computation of the reactor antineutrino energy spectra, based on the conversion of integral data of the beta spectra from 235 U, and 239;241 Pu, a deficit of reactor antineutrinos measured by short baseline experiments was pointed out. This is called the “reactor anomaly”, a new puzzle in the neutrino physics area. Since then, numerous new ex…
A class of quasi-Newton generalized Steffensen methods on Banach spaces
2002
AbstractWe consider a class of generalized Steffensen iterations procedure for solving nonlinear equations on Banach spaces without any derivative. We establish the convergence under the Kantarovich–Ostrowski's conditions. The majorizing sequence will be a Newton's type sequence, thus the convergence can have better properties. Finally, a numerical comparation with the classical methods is presented.
Transcranial magnetic stimulation and neuroplasticity
1998
We review past results and present novel data to illustrate different ways in which TMS can be used to study neural plasticity. Procedural learning during the serial reaction time task (SRTT) is used as a model of neural plasticity to illustrate the applications of TMS. These different applications of TMS represent principles of use that we believe are applicable to studies of cognitive neuroscience in general and exemplify the great potential of TMS in the study of brain and behavior. We review the use of TMS for (1) cortical output mapping using focal, single-pulse TMS; (2) identification of the mechanisms underlying neuroplasticity using paired-pulse TMS techniques; (3) enhancement of th…
A new interpretation and practical aspects of the direct-methods modulus sum function. VIII
2001
Since the first publication of the direct-methods modulus sum function [Rius (1993). Acta Cryst. A49, 406-409], the application of this function to a variety of situations has been shown in a series of seven subsequent papers. In this way, much experience about this function and its practical use has been gained. It is thought by the authors that it is now the right moment to publish a more complete study of this function which also considers most of this practical knowledge. The first part of the study relates, thanks to a new interpretation, this function to other existing phase-refinement functions, while the second shows, with the help of test calculations on a selection of crystal stru…
PALAZZO STERI DI PALERMO, SOFFITTO LIGNEO DELLA SALA MAGNA INDAGINE FITOSANITARIA
2012
ABSTRACf - Steri Palace of Palermo; Wooden Ceiling of the "Sala Magna ", Phytosanitary Survey. The Steri Palace (from Hosterium = fortified residence) of Palermo was built in the early fourteenth century, exactly from 1307 to 1320, it was Chiaramonte's family residence. Later, it became the seat of the viceroy of Sicily (from 1412 to 1577), of the Director of the Royal "Magna Curia", and Royal Customs (until 1698), of the Inquisition Tribunal (from 1701 to 1792), of the Judicial offices and Custom offices (from 1800 to 1958). Today it is the Centre of the Chancellor's offices of the University of Palermo. It contains several interesting cultural heritage artefacts, including the beautiful d…
Biodeterioration
2022
The biodeterioration of organic and inorganic materials, as well as polymers, is a complex of alteration processes induced by the growing and metabolic activity of organisms. It can be recognized on monuments, wall paintings, stone, wood, paper, vegetal/animal fibers, and parchment artworks. As defined by Hueck, 1968, biodeterioration is “any undesirable change in the properties of a material caused by the vital activities of organisms”; this definition is accepted as the meaning of the phenomenon. Both macroorganisms (such as animals, plants, and mosses) and microorganisms (such as autotrophic or heterotrophic bacteria, microfungi, cyanobacteria, algae, and lichens) represent the triggers …
Parameterisation of bivalve functional traits for mechanistic eco-physiological dynamic energy budget (DEB) models
2013
Mechanistic models such as those based on dynamic energy budget (DEB) theory are emergent ecomechanics tools to investigate the extent of fitness in organisms through changes in life history traits as explained by bioenergetic principles. The rapid growth in interest around this approach originates from the mechanistic characteristics of DEB, which are based on a number of rules dictating the use of mass and energy flow through organisms. One apparent bottleneck in DEB applications comes from the estimations of DEB parameters which are based on mathematical and statistical methods (covariation method). The parameterisation process begins with the knowledge of some functional traits of a tar…
Fish diversity associated with gas platforms: Evaluation of two underwater visual census techniques
2007
Se estudiaron las comunidades ícticas asociadas con plataformas extractivas mediante dos técnicas de censos visuales submarinos: transectos y conteos de puntos móviles. Los datos se tomaron a cuatro profundidades en tres diferentes plataformas situadas en el Mar Jónico (Crotone, Italia). Se registraron un total de 25 especies de peces pertenecientes a 12 familias. Se observaron diferencias significativas entre ambos métodos de muestreo y las profundidades en cuanto a la estructura de la comunidad íctica, la riqueza de especies y la abundancia de peces. El promedio de peces registrado con el método de transectos siempre fue mayor que el registrado mediante puntos móviles, mientras que lo con…