Search results for "Pattern"

showing 10 items of 4203 documents

Noise effect in a sine-Gordon Lattice

2013

International audience; This paper is devoted to the influence of internal noise in a sine-Gordon chain exhibiting the well known nonlinear supratransmission phenomenon. It is shown that spatiotemporal noise can trigger breather modes with a given probability in a range of parameters where they do not occur without noise. A frequency analysis is carried out to quantify the degree of coherence of the emitted breather. It is shown that there exists an appropriate amount of noise which ensures the existence of breather modes with the best coherence.

noiseBreather[PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph]Degree of coherence01 natural sciences010305 fluids & plasmaslaw.invention[NLIN.NLIN-PS]Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS]law[ PHYS.PHYS.PHYS-BIO-PH ] Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph]Quantum mechanicsLattice (order)0103 physical sciencesPhase noise[NLIN.NLIN-PS] Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS][ NLIN.NLIN-PS ] Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS]Statistical physics010306 general physicsNonlinear Sciences::Pattern Formation and SolitonsBreatherPhysicsFrequency analysis[PHYS.PHYS.PHYS-BIO-PH] Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph]Quantum noiseShot noisecoherence resonance[SPI.TRON] Engineering Sciences [physics]/Electronics[SPI.TRON]Engineering Sciences [physics]/Electronics[ SPI.TRON ] Engineering Sciences [physics]/ElectronicsNonlinear systemStochastic resonance
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Ghost stochastic resonance in FitzHugh–Nagumo circuit

2014

International audience; The response of a neural circuit submitted to a bi-chromatic stimulus and corrupted by noise is investigated. In the presence of noise, when the spike firing of the circuit is analysed, a frequency not present at the circuit input appears. For a given range of noise intensities, it is shown that this ghost frequency is almost exclusively present in the interspike interval distribution. This phenomenon is for the first time shown experimentally in a FitzHugh-Nagumo circuit.

noise[ INFO.INFO-TS ] Computer Science [cs]/Signal and Image ProcessingInterval distribution[ NLIN.NLIN-CD ] Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD][ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processingStochastic ResonanceComputer Science::Hardware ArchitectureComputer Science::Emerging Technologies[NLIN.NLIN-PS]Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS][INFO.INFO-TS]Computer Science [cs]/Signal and Image ProcessingElectronic engineering[ NLIN.NLIN-PS ] Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS]Electrical and Electronic EngineeringMathematicsCircuit noiseQuantitative Biology::Neurons and CognitionArtificial neural networkStochastic processMathematical analysisneural networksFitzhugh nagumo[ SPI.TRON ] Engineering Sciences [physics]/Electronics[SPI.TRON]Engineering Sciences [physics]/ElectronicsHarmonics[NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD]Nonlinear network analysis[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processingElectronics Letters
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Theoretical and experimental study of two discrete coupled Nagumo chains

2001

We analyze front wave (kink and antikink) propagation and pattern formation in a system composed of two coupled discrete Nagumo chains using analytical and numerical methods. In the case of homogeneous interaction among the chains, we show the possibility of the effective control on wave propagation. In addition, physical experiments on electrical chains confirm all theoretical behaviors.

nonlinear dynamicsNagumoneural network[NLIN.NLIN-PS] Nonlinear Sciences [physics]/Pattern Formation and Solitons [nlin.PS][SPI.TRON] Engineering Sciences [physics]/Electronics[PHYS.COND.CM-DS-NN] Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]
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Model społeczeństwa a założenia Specjalnej Strefy Demograficznej

2016

Założenia opolskiej Specjalnej Strefy Demograficznej odwołują się do strukturalno-systemowych teorii społeczeństwa. Stan katastrofy demograficznej wymaga, moim zdaniem, przeprowadzenia reprezentatywnych badań empirycznych wśród młodego pokolenia, opracowania socjologicznego studium i uzupełnienia teoretycznych założeń Specjalnej Strefy Demograficznej w regionie opolskim.

nowe wzorce dzietnościmodele społeczeństwaSpecjalna Strefa Demograficznakatastrofa demograficznathe demographic catastropheSpecial Demographic Zone of Opolenew patterns of fertility; models of societyStudia Ekonomiczne. Zeszyty Naukowe Uniwersytetu Ekonomicznego w Katowicach
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Nuorten ateriarytmi : Kuka syö koulupäivinä säännöllisesti?

2006

Tutkimuksessa selvitettiin aamiaisen, lounaan ja ilta-aterian muodostaman ateriarytmin yleisyyttä 7- ja 9-luokkalaisilla suomalaisnuorilla koulupäivinä. Lisäksi tarkasteltiin elintapojen, koulutusorientaation ja perhetekijöitten yhteyksiä ateriarytmin säännöllisyyteen. Tulokset perustuvat WHO-Koululaistutkimuksen kyselyyn, johon koululaiset (N = 3477) vastasivat vuonna 2002. Aineiston analysoinnissa käytettiin ristiintaulukointeja ja logistisia regressioanalyysejä. Noin 40 prosenttia pojista ja vajaa 30 prosenttia tytöistä söi aamiaisen, lounaan ja ilta-aterian säännöllisesti koulupäivinään. Vähäinen alkoholin käyttö ja aikomus mennä lukioon olivat yhteydessä säännölliseen ateriarytmiin sek…

nuoretateriarytmiadolescentsWHO-koululaistutkimusmeal patternHBSC-study
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Heritability of anterior chamber depth and axial length: a population-based twin study among 66 to 79-year old female twins.

2014

ocular refractionAnterior ChamberInheritance PatternsPopulation basedBiologyheritabilityRefraction Ocular03 medical and health sciences0302 clinical medicineTwins DizygoticInheritance PatternsHumansGene–environment interaction030304 developmental biologyAgedGenetics0303 health sciencesGeneral MedicineAxial lengthta3142Twins MonozygoticHeritabilityTwin studyta3125OphthalmologyAxial Length Eye030221 ophthalmology & optometryFemaleGene-Environment InteractionDemographyActa ophthalmologica
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Introduction of New Headwords Related to Covid-19 Pandemics in Online English Dictionaries

2022

Šī pētījuma mērķis ir izpētīt jaunu, ar Covid-19 pandēmiju saistītu, šķirkļa vārdu iekļaušanu tiešsaistes angļu valodas vārdnīcās, kā arī noteikt un analizēt to veidus, vārdu šķiras, stilistisko raksturojumu, nozīmi un pielietotos vārddarināšanas paņēmienus. Mērķa sasniegšanai ir veikts literatūras pārskats, kā arī, empīriskajā daļā, tiek izmantotas gan kvalitatīvās, gan kvantitatīvās pētījumu metodes. Pētījuma rezultāti liecina, ka visi pētītie šķirkļa vārdi, iepriekš tika bieži lietoti angļu valodas korpusā, pirms tos ieviesa tiešsaistes vārdnīcās; vairums, bija jauni šķirkļa vārdi, kas radīti, izmantojot salikteņu veidošanu, vārdu atvasināšanu un saīsinājumu, kas pārstāv gan literārās, g…

online dictionaryword-formation patternsValodniecībaheadwordlexemeEnglish corpora
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Software patterns, organizational learning and software process improvement

2011

oppiva organisaatiotiedonvälitysoppiminenKnowledge managementohjelmistotuotantoOrganizational learningtiedonhallintaCommunication in organizationstietämyksenhallintaorganisaatioComputer softwareSoftware patternsknowledge sharingohjelmistokehityssuunnittelumallittiedonkulku
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NONLINEAR OPTICS Nonlinear virtues of multimode fibre

2015

The finding that multimode optical bres support a rich and complex mix of spatial and temporal nonlinear phenomena could yield a plethora of promising applications.

optical fibersnonlinear opticsmultimode fibers; optical fibers; graded-index multimodegraded-index multimodeNonlinear Sciences::Pattern Formation and Solitonsmultimode fibers
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Optical flow estimation from multichannel spherical image decomposition

2011

International audience; The problem of optical flow estimation is largely discussed in computer vision domain for perspective images. It was also proven that, in terms of optical flow analysis from these images, we have difficulty distinguishing between some motion fields obtained with little camera motion. The omnidirectional cameras provided images with large filed of view. These images contain global information about motion and allow to remove the ambiguity present in perspective case. Nevertheless, these images contain significant radial distortions that is necessary to take into account when treating these images to estimate the motion. In this paper, we shall describe new way to comp…

optical flowComputer Science::Computer Vision and Pattern Recognition[INFO.INFO-RB] Computer Science [cs]/Robotics [cs.RO][ INFO.INFO-RB ] Computer Science [cs]/Robotics [cs.RO]ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION[INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO]Physics::OpticsOmnidirectional imagesspherical wavelets
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