Relevant bibliographies by topics / Periodic noise

Academic literature on the topic 'Periodic noise'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Periodic noise"

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Kannan, Govind, Issa M. S. Panahi, and Richard W. Briggs. "Sequentially Adapted Parallel Feedforward Active Noise Control of Noisy Sinusoidal Signals." Advances in Acoustics and Vibration 2009 (June 24, 2009): 1–13. http://dx.doi.org/10.1155/2009/694290.

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A large class of acoustic noise sources has an underlying periodic process that generates a periodic noise component, and thus their acoustic noise can in general be modeled as the sum of a periodic signal and a randomly fluctuating signal (usually a broadband background noise). Active control of periodic noise (i.e., for a mixture of sinusoids) is more effective than that of random noise. For mixtures of sinusoids in a background broadband random noise, conventional FXLMS-based single filter method does not reach the maximum achievable Noise Attenuation Level (NALmax⁡). In this paper, an alternative approach is taken and the idea of a parallel active noise control (ANC) architecture for cancelling mixtures of periodic and random signals is presented. The proposed ANC system separates the noise into periodic and random components and generates corresponding antinoises via separate noise cancelling filters, and tends to reach NALmax⁡ consistently. The derivation of NALmax⁡ is presented. Both the separation and noise cancellation are based on adaptive filtering. Experimental results verify the analytical development by showing superior performance of the proposed method, over the single-filter approach, for several cases of sinusoids in white noise.
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Guo, Yongfeng, Xiaojuan Lou, Qiang Dong, and Linjie Wang. "Stochastic resonance in a periodic potential system driven by cross-correlated noises and periodic signal." International Journal of Modern Physics B 33, no. 28 (November 10, 2019): 1950338. http://dx.doi.org/10.1142/s0217979219503387.

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In this paper, the stochastic resonance (SR) in a periodic potential system driven by cross-correlated noises and periodic signal is investigated. The signal-to-noise ratio (SNR) is used to characterize the SR. Using the algorithm of fourth-order Runge–Kutta, we obtain the curves of SNR for different parameters. The effects of some system parameters, additive Gaussian white noise and multiplicative Gaussian colored noise intensity on SR are characterized by analyzing SNR curves. When increasing system parameter and noise cross-correlation strength in SNR-D, the SR of the system can be enhanced. However, the SR will be weakened by increasing other parameters. Otherwise, the phenomena in SNR-Q are opposite to in SNR-D when increasing signal amplitude and correlation time.
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CHAPEAU-BLONDEAU, FRANÇOIS, and JULIO ROJAS-VARELA. "NONLINEAR SIGNAL PROPAGATION ENHANCED BY NOISE VIA STOCHASTIC RESONANCE." International Journal of Bifurcation and Chaos 10, no. 08 (August 2000): 1951–59. http://dx.doi.org/10.1142/s0218127400001249.

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A model is developed for a nonlinear line of coupled noisy threshold elements. The propagation on the line of various information-carrying signals, periodic, aperiodic or random, is analyzed. Different measures quantifying the efficacy of the propagation are calculated, including signal-to-noise ratio, cross-correlation measures, information-theoretic measures and propagation length. These measures are shown to be improvable by the addition of noise. These results establish a new instance of the nonlinear phenomenon of stochastic resonance under the form of a noise-enhanced propagation applying to a broad variety of signals and noises. The results also contain significance for the propagation of neuronal signals.
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Sun, Yahui, Ling Hong, Jun Jiang, and Zigang Li. "Estimation of Critical Conditions for Noise-Induced Bifurcation in Nonautonomous Nonlinear Systems by Stochastic Sensitivity Function." International Journal of Bifurcation and Chaos 26, no. 11 (October 2016): 1650184. http://dx.doi.org/10.1142/s0218127416501844.

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This paper proposes an efficient but simple method to determine the approximate stationary probability distribution around periodic attractors of nonautonomous nonlinear systems under multiple time-dependent parametric noises and estimate the critical noise intensity for noise-induced explosive bifurcations under a given confidence probability. After adopting a stroboscopic map constructed by a method with higher accuracy and efficiency, nonautonomous dynamical systems around periodic attractors are transformed into mapping ones. Then the mean-square analysis method of discrete systems is used to derive the stochastic sensitivity function. Based on the confidence ellipses of stochastic attractors and the global structure of deterministic nonlinear systems, the critical noise intensity of noise-induced explosive bifurcations under a given confidence probability is estimated. A Mathieu–Duffing oscillator under both multiplicative and additive noises is studied to show the validity of the proposed method.
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Jafari, Saeid, Petros Ioannou, and Lael Rudd. "Adaptive feedback suppression of unknown periodic components of acoustic noises with time-varying characteristics." Journal of Vibration and Control 23, no. 4 (August 9, 2016): 526–38. http://dx.doi.org/10.1177/1077546315581249.

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Effective attenuation of the noise level is an important problem in acoustic systems. In this paper, we propose a robust adaptive output feedback control scheme that can considerably attenuate narrow-band noises made up of periodic signals mixed with random noise in the presence of modeling uncertainties. The amplitude, phase and frequencies as well as the number of periodic terms are unknown and could vary with time. The performance and robustness of the proposed scheme with respect to unstructured modeling uncertainties are analyzed for continuous-time single-input, single-output systems; the results, however, are extendable to multi-channel systems. The successful attenuation of the unknown periodic components of the disturbance despite the time variations, modeling errors, and random noise is demonstrated using simulations. In addition, guidelines how to choose certain design parameters for performance improvement have been presented.
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LONG, FEI, and DONGCHENG MEI. "ASYMMETRIC EFFECTS ON STOCHASTIC RESONANCE IN THE BISTABLE SYSTEM SUBJECT TO CORRELATED NOISES." International Journal of Modern Physics B 26, no. 24 (August 28, 2012): 1250125. http://dx.doi.org/10.1142/s0217979212501251.

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Asymmetric effects on the stochastic resonance (SR) in the bistable system with correlated noises are investigated. Based on the theory of signal-to-noise ratio (SNR), the expressions of SNR are derived for the case of the additive signal and the case of the multiplicative signal, respectively. Through the numerical computation, it is found in both cases of additive and multiplicative periodic signals (i) The asymmetric effects on SR phenomenon in the system induced by the multiplicative noise is dependent of initial conditions, i.e., the asymmetric parameter r weakens the SR for the initial condition of x(t = 0) = x+, however, r enhances the SR for the initial condition of x(t = 0) = x-; (ii) The asymmetric effects on SR phenomenon in the system induced by the additive noise and the correlation between noises is independent of initial conditions, i.e., the r always enhance the SR; (iii) Synergistic action of the noises, the correlation between noises, the periodic signal and the system's asymmetry induces symmetry revival.
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Takagi, Ryota, Genti Toyokuni, and Naotaka Chikasada. "Ambient noise correlation analysis of S-net records: extracting surface wave signals below instrument noise levels." Geophysical Journal International 224, no. 3 (November 17, 2020): 1640–57. http://dx.doi.org/10.1093/gji/ggaa548.

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SUMMARY We applied ambient noise cross-correlation analysis to the cabled ocean bottom seismic network offshore northeast Japan (Seafloor observation network for earthquakes and tsunamis along the Japan Trench: S-net) to extract surface waves propagating in the ocean area of the forearc region. We found two types of peculiar pulses in the cross-correlation functions (CCFs) of ambient seismic noise records: periodic pulses mainly every minute and sharp pulses around the lag time zero. These pulses strongly contaminate the surface wave signals in the CCFs at frequencies below ∼0.1 Hz. The periodic pulses originate from periodic instrument noises, while the zero-lag pulses originate from random instrument noises which are coherent within station pairs. By developing solutions to remove the periodic and zero-lag pulses based on the characteristics of the pulses, we succeeded in extracting Rayleigh and Love wave signals from the S-net records at 0.03–0.3 Hz, while the surface wave signals at 0.03–0.1 Hz were not visible without the application of these solutions. These solutions widen the frequency range of analysis, and may be applicable to other seismic networks, particularly to recent dense but non-broad-band networks. We identified the fundamental and first higher modes of Rayleigh waves and the fundamental mode of the Love wave. The extracted surface wave signals can constrain the shear wave velocity structure from the sediment to seismogenic zone around the megathrust plate boundary in the forearc region.
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Seidner, D., and M. Feder. "Noise amplification of periodic nonuniform sampling." IEEE Transactions on Signal Processing 48, no. 1 (2000): 275–77. http://dx.doi.org/10.1109/78.815502.

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Weissman, Y. "Optical noise in frequency-periodic networks." Journal of Lightwave Technology 12, no. 9 (1994): 1660–67. http://dx.doi.org/10.1109/50.320950.

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Bodson, M., J. S. Jensen, and S. C. Douglas. "Active noise control for periodic disturbances." IEEE Transactions on Control Systems Technology 9, no. 1 (2001): 200–205. http://dx.doi.org/10.1109/87.896760.

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Dissertations / Theses on the topic "Periodic noise"

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Jenkins, Michael David. "Active control of periodic machinery vibrations." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480701.

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Errico, Fabrizio. "Flow-Induced Vibrations and Noise of Periodic Structural Systems." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEC002.

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La plupart de la littérature considère différents travaux sur le bruit et les vibrations induit par l’écoulement du fluide pour les pièces structurelles de base, comme les plaques de Kirchhoff. L’objectif principal de cette recherche est d’étendre le travail effectué à des structures périodiques ciblant un certain nombre de nouveautés en ce qui concerne différentes échelles: l’échelle aérodynamique, l’échelle de périodicité et l’échelle de fréquence. Même si des approches analytiques et numériques fondées sur des éléments finis (FE) ont été élaborées pour traiter des problèmes particuliers, certaines limites persistent. Par exemple, l’effort de calcul peut facilement devenir lourd même pour les formes structurelles simples ou pour augmenter la fréquence d’excitation; les longueurs d’onde convectives, pour la plupart des cas d’intérêt industriel, sont largement plus petites que les longueurs d’onde flexionnelles et, par conséquent, les maillages deviennent plus exigeantes. Lorsque la complexité structurelle augmente, même les modèles à petite échelle peuvent nécessiter un grand nombre d’éléments augmentant le coût de calcul. Dans les cadres des méthodes basées sur la FE, ce travail propose deux approches numériques pour traiter les vibrations et le bruit induits par une excitation de la couche limite turbulente (TBL) sur les systèmes structurels périodiques. Tout d’abord, une méthode 1D WFE (Wave Finite Element) est développé pour traiter les excitations aléatoires de structures finies plates, courbes et coniques: modèles multicouches et homogénéisés sont utilisés. Dans ce cas, une seule sous-structure est modélisée à l’aide d’éléments finis. À chaque pas de fréquence, des liens périodiques unidimensionnels entre les nœuds sont appliqués pour obtenir l’ensemble des ondes se propageant le long de la direction de la périodicité; la méthode peut être appliquée même pour les systèmes périodiques cycliques. L’ensemble des vagues est successivement utilisé pour calculer les fonctions de transfert de Green entre un ensemble de degrés de liberté cibles et un sous-ensemble représentant les zones chargées. En utilisant une matrice de transfert, les vibrations induites par l’écoulement sont calculées dans un cadre FE. Ensuite, une approche 2D WFE est développée en combinaison avec une synthèse de charge basée sure le nombre d’ondes pour simuler la transmission sonore de structures infinies plates, courbes et axisymétriques: des modèles périodiques homogénéisés et complexes sont analysés. Dans ce cas, les effets de taille finie sont comptabilisés en utilisant une équivalence pour les structures plates et une analogie cylindrique pour les panneaux courbes. Les approches numériques présentées ont été validées avec des résultats analytiques, numériques et expérimentaux pour différents cas d’essai et dans des conditions de charge différentes. En particulier, la réponse analytique et la FEM classique ont été utilisées comme références pour valider les vibrations des plaques et des cylindres sous charge de la couche limite turbulente; la méthode FE a également été utilisée pour valider une structure complexe et effilée sous excitation acoustique diffuse et le calcul du bruit induit par couche limite turbulente. Du point de vue expérimental, l’approche a été validée en comparant les résultats en termes de perte de transmission acoustique évaluée sur les panneaux de fuselage des aéronefs (panneaux composites en nid d’abeille et panneaux courbes à double nervure) sous excitation diffuse du champ acoustique. Enfin, l’utilisation des méthodologies présentées pour l’optimisation vibroacoustique des plaques sandwich, est analysée et proposée à travers certaines études de cas. Les conceptions périodiques standard du cœur sont modifiées en adaptant la propagation des ondes de flexion et de cisaillement par rapport à la fréquence, aux nombres d’ondes acoustiques et convectives. {…]
Most of the literature considers different works on the flow-induced noise and vibrations for basic structural parts, such as Kirchhoff plates. The main objective of this research is to extend the work done to periodic structures targeting a number of novelties with regards to different scales: the aerodynamic scale, the periodicity scale and the frequency scale.Even though analytical and Finite Element(FE)-based numerical approaches have been developed to deal with specific problems, some limits still persist. For example, the computational effort can easily become cumbersome even for simple structural shapes or for increasing excitation frequency; the convective wavelengths, for most industrially-relevant cases, are largely smaller that flexural ones and, thus, the meshing requirements become more demanding. When the structural complexity increases, even small scale models might require a high number of elements increasing computational cost.In the frameworks of FE and WFE based methods, this work proposes two numerical approaches to deal with the vibrations and noise induced by a Turbulent Boundary Layer (TBL) excitation on periodic structural systems. Firstly, a 1D WFE (Wave Finite Element) scheme is developed to deal with random excitations of flat, curved and tapered finite structures: multi-layered and homogenised models are used. In this case a single substructure is modelled using finite elements. At each frequency step, one-dimensional periodic links among nodes are applied to get the set of waves propagating along the periodicity direction; the method can be applied even for cyclic periodic systems. The set of waves is successively used to calculate the Green transfer functions between a set of target degrees of freedom and a subset representing the wetted (loaded) ones. Subsequently, using a transfer matrix approach, the flow-induced vibrations are calculated in a FE framework.Secondly, a 2D WFE approach is developed in combination with a wavenumber-space load synthesis to simulate the sound transmission of infinite flat, curved and axisymmetric structures: both homogenised and complex periodic models are analysed. In this case, finite-size effects are accounted using a baffled window equivalence for flat structures and a cylindrical analogy for curved panels.The presented numerical approaches have been validated with analytical, numerical and experimental results for different test cases and under different load conditions. In particular, analytical response and classic FEM have been used as references to validate the flow-induced vibrations of plates and cylinders under turbulent boundary layer load; FE method has been used also to validate a tapered conical-cylindrical model under diffuse acoustic field excitation and the flow-induced noise computations under TBL. From experimental point of view, the approach has been validated comparing results in terms of transmission loss evaluated on aircraft fuselage panels (composite honeycomb and doubly-ribbed curved panels) under diffuse acoustic field excitation.Finally, the use of the presented methodologies for the vibroacoustic optimization of sandwich plates, is analysed and proposed through some case-studies. Standard periodic core designs are modified tailoring the bending and shear waves' propagation versus frequency against the acoustic and convective wavenumbers. The resulting sound transmission losses are computed using the numerical approaches developed in this work and validated with measurements under diffuse acoustic field, taken from 3D-printed models. Strong increases of sound transmission loss are observed for fixed mass of the plates and between 1.5 kHz and 10 kHz
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Sanchez, Juan Eusebio. "Semiconductor device simulation of low-frequency noise under periodic large-signal conditions." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001178.

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Wu, Yue. "Pathwise anticipating random periodic solutions of SDEs and SPDEs with linear multiplicative noise." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/15991.

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In this thesis, we study the existence of pathwise random periodic solutions to both the semilinear stochastic differential equations with linear multiplicative noise and the semilinear stochastic partial differential equations with linear multiplicative noise in a Hilbert space. We identify them as the solutions of coupled forward-backward infinite horizon stochastic integral equations in general cases, and then perform the argument of the relative compactness of Wiener-Sobolev spaces in C([0, T],L2Ω,Rd)) or C([0, T],L2(Ω x O)) and Schauder's fixed point theorem to show the existence of a solution of the coupled stochastic forward-backward infinite horizon integral equations.
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Kinney, Charles E. "Realtime controller tuning for periodic disturbance rejection with application to active noise control." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3352708.

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Thesis (Ph. D.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed June 16, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 159-167).
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Kuhwald, Isabelle [Verfasser], Ilya [Akademischer Betreuer] Pavlyukevich, and Samuel [Akademischer Betreuer] Herrmann. "Small noise analysis of time-periodic bistable jump diffusion / Isabelle Kuhwald. Gutachter: Ilya Pavlyukevich ; Samuel Herrmann." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1076503144/34.

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Kulebi, Baybars. "The Broad-band Noise Characteristics Of Selected Cataclysmic Variables (cvs), Anomalous X-ray Pulsars (axps) And Soft Gamma Repeaters (sgrs)." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608117/index.pdf.

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In this work present the broad-band noise structure in the 2-60 keV data of Cataclysmic Variables (CVs) with Anomalous X-Ray Pulsars (AXPs) and Soft Gamma Repeaters (SGRs). We analyzed Rossi X-ray Timing Explorer (RXTE) PCA data and derived time series from 27 CVs, 4 AXPs and 1 SGR using the RXTE archive. In general, CVs of different types all show broad band noise which can be fitted with power laws, using exponentional cut-offs, and Lorentzians in a similar way to power spectral (noise) characteristics of X-ray Binaries (XRBs). In general terms the power spectra show a power law index of (-)1.2-2. A rather large scale flattening of the power spectra exits in nonmagnetic systems in the low to very low frequency range. We observe that in low and high states/outbursts the noise in the high frequency range and low frequency range is changed. CVs show considerably low frequency noise. In addition, we recovered several possible QPOs in the X-ray wavelengths from CVs mainly from Intermediate Polar systems. AXP and SGR sources which are thought to be powered by either magnetic decay or accretion show band limited noise in their low frequencies. We also correlated their equal time interval noise characteristic with their burst states and discovered that in the two AXPs (1E 2259+586, 1E 1048.1-5937) noise correlates with their bursts.
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Lippolis, Domenico. "How well can one resolve the state space of a chaotic map?" Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33841.

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All physical systems are affected by some noise that limits the resolution that can be attained in partitioning their state space. For chaotic, locally hyperbolic flows, this resolution depends on the interplay of the local stretching/contraction and the smearing due to noise. My goal is to determine the `finest attainable' partition for a given hyperbolic dynamical system and a given weak additive white noise. That is achieved by computing the local eigenfunctions of the Fokker-Planck evolution operator in linearized neighborhoods of the periodic orbits of the corresponding deterministic system, and using overlaps of their widths as the criterion for an optimal partition. The Fokker-Planck evolution is then represented by a finite transition graph, whose spectral determinant yields time averages of dynamical observables. The method applies in principle to both continuous- and discrete-time dynamical systems. Numerical tests of such optimal partitions on unimodal maps support my hypothesis.
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Jbili, Nadia. "Conception et analyse des schémas d'optimisation pour la résonance magnétique nucléaire Optimal periodic control of spin systems : Application to the maximization of the signal to noise ratio per unit time." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLED025.

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Cette thèse porte sur des techniques de contrôle optimal pour des systèmes issus de la mécanique quantique et de la résonance magnétique nucléaire. Le travail présenté dans ce mémoire est divisé en quatre parties.Dans la première partie, nous nous sommes intéressés au contrôle optimal simultané de l’équation de Schrödinger dépendante du temps via un champ laser qui représente le contrôle et que nous supposons soumis à une famille de perturbations. Ceci nous conduit à considérer un problème d’optimisation multi-critère via l’introduction d’un ensemble de fonctionnelles de coût à minimiser (au sens de Pareto).Dans la deuxième partie, nous étudions le cadre mathématique de l’équation de Bloch périodique. Les conditions d’optimalité nécessaires du premier ordre sont étudiées. Plus précisément, nous prouvons l’existence d’une solution périodique, ainsi que l’existence d’un optimum.Dans la troisième partie, nous présentons un nouvel algorithme d’optimisation pour les dynamiques périodiques. Cet algorithme est appliqué à la maximisation du signal sur bruit en résonance magnétique nucléaire. Le travail réalisé est ici avant tout numérique et algorithmique. Il s’agit à notre connaissance du premier algorithme de contrôle quantique permettant de considérer des dynamiques périodiques en temps. Nous avons montré l’efficacité de cette méthode pour le cas d’un système de spins homogènes et inhomogènes.La dernier partie permet de présenter l’algorithme de Shinnar-Le-Roux (SLR) qui est une méthode d’optimisation analytique. Des résultats numériques ont été réalisés en comparant cette méthode avec une méthode itérative de type GRAPE introduite dans les chapitres précédents. Le résultat de cette comparaison donne un avantage à l’algorithme SLR
This thesis deals with optimal control techniques for systems related to quantum mechanics and nuclear magnetic resonance. The work presented in this memory is divided into four parts.In the first part, we focus on to the simultaneous optimal control of the Schrödinger time-dependent equations via a laser field that represents a control term and that is assumed to be submitted to a family of perturbations. This lead us to consider a multi-criteria optimization problem through the introduction of a set of cost functional to be minimized (in the sense of Pareto).In the second part, we study the mathematical framework of the periodic Bloch equation. The necessary first-order optimality conditions are derived. More precisely, we prove the existence of a periodic solution, as well as the existence of an optimum.In the third part, we present a new optimization algorithm for periodic dynamics. This algorithm is applied to the maxi- mization of SNR in NMR. The work here is more of an numerical and algorithmic nature. To our knowledge, this is the first quantum control algorithm to consider periodic dynamics in time. We have shown the efficiency of this method in the case of a homogeneous and inhomogeneous spin system.The last part presents the Shinnar-Le-Roux algorithm (SLR), which is an analytical optimization method. Numerical results were obtained by comparing this method with an iterative grape-type method introduced in previous chapters. The result of this comparison gives an advantage to the SLR algorithm
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Князь, Ігор Олександрович, Игорь Александрович Князь, Ihor Oleksandrovych Kniaz, and В. Ю. Постна. "Індукований шумом рух частинок у періодичних силових полях." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39352.

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Дослідження індукованого шумом руху становить фундаментальну проблему статистичної фізики. Згідно другого закону термодинаміки у рівноважному стані внутрішній шум не здатен викликати направлений рух частинок. При виведенні системи із стану рівноваги такий рух стає можливим (за умови порушення поступальної інваріантності у просторі або часі). Для вивчення подібних ефектів, як правило, у систему вносять елемент порушення симетрії періодичного потенціалу, який і задає напрямок руху частинок.
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Books on the topic "Periodic noise"

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Ethell, Jeffrey. The history of aircraft nose art: WW1 to today. Sparkford: Haynes, 1991.

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Norse warfare: The unconventional battle strategies of the ancient Vikings. New York: Hippocrene Books, 2007.

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G, Keevill, Aston Michael, and Hall Teresa Anne, eds. Monastic archaeology: Papers on the study of medieval monasteries. Oxford: Oxbow, 2001.

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The world they made together: Black and white values in eighteeth-century Virginia. Princeton: Princeton University Press, 1989.

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The world they made together: Black and white values in eighteenth-century Virginia. Princeton, N.J: Princeton University Press, 1987.

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Interdecadal variations in the Alaska gyre. [Washington, DC: National Aeronautics and Space Administration, 1995.

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H, Sakhavat, and United States. National Aeronautics and Space Administration., eds. Systematic and random variations in digital thematic mapper data: Final report. [Washington, DC: National Aeronautics and Space Administration, 1985.

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Huffaker, Ray, Marco Bittelli, and Rodolfo Rosa. Entropy and Surrogate Testing. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198782933.003.0005.

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Reconstructing real-world system dynamics from time series data on a single variable is challenging because real-world data often exhibit a highly volatile and irregular appearance potentially driven by several diverse factors. NLTS methods help eliminate less likely drivers of dynamic irregularity. We set a benchmark for regular behavior by investigating how linear systems of ODEs are restricted to exponential and periodic dynamics, and illustrating how irregular behavior can arise if regular linear dynamics are corrupted with noise or shift over time (i.e., nonstationarity). We investigate how data can be pre-processed to control for the noise and nonstationarity potentially camouflaging nonlinear deterministic drivers of observed complexity. We can apply signal-detection methods, such as Singular Spectrum Analysis (SSA), to separate signal from noise in the data, and test the signal for nonstationarity potentially corrected with SSA. SSA measures signal strength which provides a useful initial indicator of whether we should continue searching for endogenous nonlinear drivers of complexity. We begin diagnosing deterministic structure in an isolated signal by attempting to reconstructed a shadow attractor. Finally, we use the classic Lorenz equations to illustrate how a deterministic nonlinear system of ODEs with at least three equations can generate observed irregular dynamics endogenously without aid of exogenous shocks or nonstationary dynamics.
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Edmondson, Belinda. Creole Noise. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192856838.001.0001.

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Creole Noise constructs a literary history of Creole literature—also known as dialect literature, or literary dialect—and performance in the English-speaking Caribbean from the heyday of colonialism in the late-eighteenth century to the post-Emancipation period of the late-nineteenth and early-twentieth century. It does so from an understanding that Creole is an essential feature of Caribbean cultural production. In emphasizing travel, the gendering of literary dialect, pro-slavery authors, and multi-racial authors, the book revises the common view that Creole literature was an insular local practice of the twentieth century Caribbean, or solely the product of modern, anti-colonial, black-affirming nationalist projects. Authors of early literary dialect include white creoles, blacks and browns. The book reconstructs an earlier proliferation of dialect literature in the preceding centuries, usually dismissed as merely racist mimicry of “black talk”, not understood as part of a continuum of artistic production in the Caribbean. The book argues that the Caribbean’s history of dialect literature is a factor in the literary histories of the United States and the wider trans-Atlantic.
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Brophy, Philip. Parties in Your Head. Edited by John Richardson, Claudia Gorbman, and Carol Vernallis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oxfordhb/9780199733866.013.0021.

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This article appears in theOxford Handbook of New Audiovisual Aestheticsedited by John Richardson, Claudia Gorbman, and Carol Vernallis. The sound of nightclubs and club music has transformed spatial scale, frequency range, and volume levels in film soundtracks for the past twenty-five years. Across this period, spatialization is intensified, the soundtrack gets noiser, and characterization favors unbalanced psychological states. Consequently, an aural “Other” becomes progressively encoded and registered. The texture of recorded sound on film becomes affected by non-cinematic aurality, responding to approaches to microphone placement in pop music, and the role that psycho-acoustics play in shaping psychological drama. Discussion ensues to audit the noise inside the addled heads of characters in a selection of films which exemplify this transformative audiovision in cinema:Scorpio Rising, Vinyl, Scarface, Blue Velvet, La Vie Nouvelle, andIrréversible.
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Book chapters on the topic "Periodic noise"

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Seguret, S. A. "Filtering Periodic Noise by Using Trigonometric Kriging." In Geostatistics, 481–91. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-015-6844-9_37.

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El Waled, Khalil. "Parametric Estimation Problem for a Time Periodic Signal in a Periodic Noise." In Applied Condition Monitoring, 19–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16330-7_2.

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ter Maten, E. J. W., J. G. Fijnvandraat, C. Lin, and J. M. F. Peters. "Periodic AC and Periodic Noise in RF Simulation for Electronic Circuit Design." In Modeling, Simulation, and Optimization of Integrated Circuits, 121–34. Basel: Birkhäuser Basel, 2003. http://dx.doi.org/10.1007/978-3-0348-8065-7_8.

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Karimi, M., P. Croaker, and N. Kessissoglou. "Trailing-Edge Noise Prediction Using a Periodic BEM Technique." In Fluid-Structure-Sound Interactions and Control, 39–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48868-3_6.

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Kenyeres, A., and C. Bruyninx. "Noise and Periodic Terms in the EPN Time Series." In Geodetic Reference Frames, 143–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_22.

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Wedig, W. "Nonlinear road-vehicle systems under filtered and periodic noise excitations." In Insights and Innovations in Structural Engineering, Mechanics and Computation, 227–32. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-38.

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Awrejcewicz, J., A. V. Krysko, I. V. Papkova, N. P. Erofeev, and V. A. Krysko. "Chaotic Dynamics of Structural Members Under Regular Periodic and White Noise Excitations." In Lecture Notes in Computer Science, 25–32. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57099-0_3.

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Coppejans, Mark, and Ian Domowitz. "Noise in the Price Discovery Process: A Comparison of Periodic and Continuous Auctions." In The Electronic Call Auction: Market Mechanism and Trading, 411–22. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1697-2_26.

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Buceta, R. C., M. S. Torre, and H. F. Ranea-Sandoval. "Laser Model with Periodic External Injected Signal and Noise: Small Net Gain Limit." In Nonlinear Phenomena and Complex Systems, 137–43. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0239-8_13.

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Montejo, N., M. N. Lorenzo, V. Pérez-Muñuzuri, and V. Pérez-Villar. "On the Effect of Time Correlated Noise and Periodic Forcing on a Neuronal System." In Instabilities and Nonequilibrium Structures IX, 249–57. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0991-1_16.

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Conference papers on the topic "Periodic noise"

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Saigusa, Tetsu, and Toshiyuki Nakagaki. "Anticipation of periodic environmental changes in an amoeba." In NOISE AND FLUCTUATIONS: 19th International Conference on Noise and Fluctuations; ICNF 2007. AIP, 2007. http://dx.doi.org/10.1063/1.2759762.

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Jung, Peter. "Correlated hopping and transport in tilted periodic potentials." In Noise in physical systems and 1/. AIP, 1993. http://dx.doi.org/10.1063/1.44631.

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Royston, Thomas J., and Rajendra Singh. "Periodic Response of Nonlinear Engine Mounting Systems." In SAE Noise and Vibration Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/951297.

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Grigoras, Victor, and Carmen Grigoras. "Chaotic noise generators with periodic nonlinearities." In 2011 10th International Symposium on Signals, Circuits and Systems (ISSCS). IEEE, 2011. http://dx.doi.org/10.1109/isscs.2011.5978662.

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Bodson, M., J. S. Jensen, and S. C. Douglas. "Active noise control for periodic disturbances." In Proceedings of the 1998 American Control Conference (ACC). IEEE, 1998. http://dx.doi.org/10.1109/acc.1998.703109.

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Frausto, Claudio, and Jorge Ojeda-Castaneda. "Multiplicative noise reduction in periodic patterns." In 3rd Iberoamerican Optics Meeting and 6th Latin American Meeting on Optics, Lasers, and Their Applications, edited by Angela M. Guzman. SPIE, 1999. http://dx.doi.org/10.1117/12.358382.

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Yadav, Vipin Prakash, Gajendra Singh, Md Imtiyaz Anwar, and Arun Khosla. "Periodic noise removal using local thresholding." In 2016 Conference on Advances in Signal Processing (CASP). IEEE, 2016. http://dx.doi.org/10.1109/casp.2016.7746148.

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Adorno, D. Persano, N. Pizzolato, B. Spagnolo, Massimo Macucci, and Giovanni Basso. "Monte Carlo Study of Diffusion Noise Reduction in GaAs Operating under Periodic Conditions." In NOISE AND FLUCTUATIONS: 20th International Conference on Noice and Fluctuations (ICNF-2009). AIP, 2009. http://dx.doi.org/10.1063/1.3140409.

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Kannan, Govind, Ali A. Milani, and Issa Panahi. "Active noise control of noisy periodic signals using signal separation." In ICASSP 2008 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2008. http://dx.doi.org/10.1109/icassp.2008.4517935.

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Dubkov, Alexander A., and Bernardo Spagnolo. "Acceleration of diffusion in switching periodic sawtooth potential." In Second International Symposium on Fluctuations and Noise, edited by Zoltan Gingl. SPIE, 2004. http://dx.doi.org/10.1117/12.547045.

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Reports on the topic "Periodic noise"

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Innes, Walter R. Noise in a Calorimeter Readout System Using Periodic Sampling. Office of Scientific and Technical Information (OSTI), February 2009. http://dx.doi.org/10.2172/948482.

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He, Shuyuan, and Benjamin Kedem. HOC Spectral Analysis of an Almost Periodic Random Sequence in Noise,. Fort Belvoir, VA: Defense Technical Information Center, May 1987. http://dx.doi.org/10.21236/ada185528.

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Job, Jacob. Mesa Verde National Park: Acoustic monitoring report. National Park Service, July 2021. http://dx.doi.org/10.36967/nrr-2286703.

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In 2015, the Natural Sounds and Night Skies Division (NSNSD) received a request to collect baseline acoustical data at Mesa Verde National Park (MEVE). Between July and August 2015, as well as February and March 2016, three acoustical monitoring systems were deployed throughout the park, however one site (MEVE002) stopped recording after a couple days during the summer due to wildlife interference. The goal of the study was to establish a baseline soundscape inventory of backcountry and frontcountry sites within the park. This inventory will be used to establish indicators and thresholds of soundscape quality that will support the park and NSNSD in developing a comprehensive approach to protecting the acoustic environment through soundscape management planning. Additionally, results of this study will help the park identify major sources of noise within the park, as well as provide a baseline understanding of the acoustical environment as a whole for use in potential future comparative studies. In this deployment, sound pressure level (SPL) was measured continuously every second by a calibrated sound level meter. Other equipment included an anemometer to collect wind speed and a digital audio recorder collecting continuous recordings to document sound sources. In this document, “sound pressure level” refers to broadband (12.5 Hz–20 kHz), A-weighted, 1-second time averaged sound level (LAeq, 1s), and hereafter referred to as “sound level.” Sound levels are measured on a logarithmic scale relative to the reference sound pressure for atmospheric sources, 20 μPa. The logarithmic scale is a useful way to express the wide range of sound pressures perceived by the human ear. Sound levels are reported in decibels (dB). A-weighting is applied to sound levels in order to account for the response of the human ear (Harris, 1998). To approximate human hearing sensitivity, A-weighting discounts sounds below 1 kHz and above 6 kHz. Trained technicians calculated time audible metrics after monitoring was complete. See Methods section for protocol details, equipment specifications, and metric calculations. Median existing (LA50) and natural ambient (LAnat) metrics are also reported for daytime (7:00–19:00) and nighttime (19:00–7:00). Prominent noise sources at the two backcountry sites (MEVE001 and MEVE002) included vehicles and aircraft, while building and vehicle predominated at the frontcountry site (MEVE003). Table 1 displays time audible values for each of these noise sources during the monitoring period, as well as ambient sound levels. In determining the current conditions of an acoustical environment, it is informative to examine how often sound levels exceed certain values. Table 2 reports the percent of time that measured levels at the three monitoring locations were above four key values.
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Quinn, Meghan. Geotechnical effects on fiber optic distributed acoustic sensing performance. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41325.

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Distributed Acoustic Sensing (DAS) is a fiber optic sensing system that is used for vibration monitoring. At a minimum, DAS is composed of a fiber optic cable and an optic analyzer called an interrogator. The oil and gas industry has used DAS for over a decade to monitor infrastructure such as pipelines for leaks, and in recent years changes in DAS performance over time have been observed for DAS arrays that are buried in the ground. This dissertation investigates the effect that soil type, soil temperature, soil moisture, time in-situ, and vehicle loading have on DAS performance for fiber optic cables buried in soil. This was accomplished through a field testing program involving two newly installed DAS arrays. For the first installation, a new portion of DAS array was added to an existing DAS array installed a decade prior. The new portion of the DAS array was installed in four different soil types: native fill, sand, gravel, and an excavatable flowable fill. Soil moisture and temperature sensors were buried adjacent to the fiber optic cable to monitor seasonal environmental changes over time. Periodic impact testing was performed at set locations along the DAS array for over one year. A second, temporary DAS array was installed to test the effect of vehicle loading on DAS performance. Signal to Noise Ratio (SNR) of the DAS response was used for all the tests to evaluate the system performance. The results of the impact testing program indicated that the portions of the array in gravel performed more consistently over time. Changes in soil moisture or soil temperature did not appear to affect DAS performance. The results also indicated that time DAS performance does change somewhat over time. Performance variance increased in new portions of array in all material types through time. The SNR in portions of the DAS array in native silty sand material dropped slightly, while the SNR in portions of the array in sand fill and flowable fill material decreased significantly over time. This significant change in performance occurred while testing halted from March 2020 to August 2020 due to the Covid-19 pandemic. These significant changes in performance were observed in the new portion of test bed, while the performance of the prior installation remained consistent. It may be that, after some time in-situ, SNR in a DAS array will reach a steady state. Though it is unfortunate that testing was on pause while changes in DAS performance developed, the observed changes emphasize the potential of DAS to be used for infrastructure change-detection monitoring. In the temporary test bed, increasing vehicle loads were observed to increase DAS performance, although there was considerable variability in the measured SNR. The significant variation in DAS response is likely due to various industrial activities on-site and some disturbance to the array while on-boarding and off-boarding vehicles. The results of this experiment indicated that the presence of load on less than 10% of an array channel length may improve DAS performance. Overall, this dissertation provides guidance that can help inform the civil engineering community with respect to installation design recommendations related to DAS used for infrastructure monitoring.
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Bullard, Sophie J., Jr ,. Bernard S. Covino, James H. Russell, Gordon R. Holcomb, Stephen D. Cramer, and Margaret Ziomek-Moroz. Electrochemical Noise Sensors for Detection of Localized and General Corrosion of Natural Gas Transmission Pipelines. Final Report for the Period July 2001-October 2002. Office of Scientific and Technical Information (OSTI), December 2002. http://dx.doi.org/10.2172/808423.

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Farahbod, A. M., and J. F. Cassidy. An overview of seismic attenuation in the Eastern Canadian Arctic and the Hudson Bay Complex, Manitoba, Newfoundland and Labrador, Nunavut, Ontario, and Quebec. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330396.

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In this study we investigated coda-wave attenuation (QC) from the eastern Canadian Arctic in Nunavut and the Hudson Bay complex including portions of northern Manitoba, Ontario, Quebec and Labrador. We used earthquake recordings from 15 broadband and 3 short period seismograph stations of the Canadian National Seismic Network (CNSN) and 29 broadband stations of the POLARIS network across the region. Our dataset is comprised of 637 earthquakes recorded between 1985 and 2021 with magnitudes ranging from 1.3 to 6.1, depths from 0 to 20 km and epicentral distances of 5 to 100 km. This gives a total of 246 high signal-to-noise (S/N) traces (S/N[lesser/equal]5.0) useful for QC calculation (with a maximum ellipse parameter, a2, of 100) across the region. Coda windows were selected to start at tc = 2tS (two times the travel time of the direct S wave), and were filtered at center frequencies of 2, 4, 8, 12 and 16 Hz. Our study reveals a consistent pattern. We find that in the northern section of the study area, the highest Q0 values (e.g., Q0 of 110 and 112) are at station POIN and station RES, respectively, which are located in the older Archean province. The lowest Q0 values that we find (e.g., Q0 of 55 and 61) are at station AKVQ and IVKQ respectively, located in northern Quebec. Smaller Q0 values for stations in the south are explained by the younger age of the rocks and proximity to the main fault systems. An average for all the data results in a Q relationship of QC = 82f1.08 for the frequency band of 2 to 16 Hz for the entire region.
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Farahbod, A. M., and J. F. Cassidy. An overview of seismic attenuation in the Northern Appalachians Seismic Zone, New Brunswick and Nova Scotia. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329702.

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In this study we investigated coda-wave attenuation (QC) from the northern Appalachian region of eastern Canada in the two provinces of New Brunswick and Nova Scotia. We used earthquake recordings from 8 broadband and 2 short period seismograph stations of the Canadian National Seismograph Network (CNSN) across the region. Our dataset is comprised of 476 earthquakes recorded between 1983 and 2021 with magnitudes ranging from 1.5 to 4.1, depths from 0 to 20 km (with the vast majority being <10 km) and epicentral distances of 5 to 100 km. This gives a total of 261 high signalto- noise (S/N) traces (S/N greater than or equal to 5.0) useful for QC calculation (with a maximum ellipse parameter, a2, of 100) across the region. Coda windows were selected to start at tc = 2tS (two times the travel time of the direct S wave), and were filtered at center frequencies of 2, 4, 8, 12 and 16 Hz. Our study reveals a consistent pattern. We find that in the northern New Brunswick, the lowest Q0 values (e.g., Q0 of 61) are at station KLN which is the closest station to the epicenter of the 1982 Miramichi earthquake (M 5.8). The highest Q0 values that we find (e.g., Q0 of 178) are at station GGN, located in the southern New Brunswick. Smaller Q0 values for stations in the north (closer to the Charlevoix-Kamouraska seismic zone or Miramichi source area) is explained by Jin and Aki's (1988) finding that Q0 is lower in the vicinity of large earthquakes. An average for all the data results in a Q relationship of QC = 99f0.96 for the frequency band of 2 to 16 Hz for the entire region.
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