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Готові списки джерел за темами / Dirac measures estimation

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Добірка наукової літератури з теми "Dirac measures estimation"

Автор: Grafiati

Опубліковано: 23 лютого 2024

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Статті в журналах з теми "Dirac measures estimation"

1

Capasso, Vincenzo, and Elena Villa. "ON MEAN DENSITIES OF INHOMOGENEOUS GEOMETRIC PROCESSES ARISING IN MATERIAL SCIENCE AND MEDICINE." Image Analysis & Stereology 26, no. 1 (2011): 23. http://dx.doi.org/10.5566/ias.v26.p23-36.

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The scope of this paper is to offer an overview of the main results obtained by the authors in recent literature in connection with the introduction of a Delta formalism, á la Dirac-Schwartz, for random generalized functions (distributions) associated with random closed sets, having an integer Hausdorff dimension n lower than the full dimension d of the environment space Rd. A concept of absolute continuity of random closed sets arises in a natural way in terms of the absolute continuity of suitable mean content measures, with respect to the usual Lebesgue measure on Rd. Correspondingly mean g

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2

Allendes, Alejandro, Enrique Otárola, Richard Rankin, and Abner J. Salgado. "Ana posteriorierror analysis for an optimal control problem with point sources." ESAIM: Mathematical Modelling and Numerical Analysis 52, no. 5 (2018): 1617–50. http://dx.doi.org/10.1051/m2an/2018010.

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We propose and analyze a reliable and efficienta posteriorierror estimator for a control-constrained linear-quadratic optimal control problem involving Dirac measures; the control variable corresponds to the amplitude of forces modeled as point sources. The proposeda posteriorierror estimator is defined as the sum of two contributions, which are associated with the state and adjoint equations. The estimator associated with the state equation is based on Muckenhoupt weighted Sobolev spaces, while the one associated with the adjoint is in the maximum norm and allows for unbounded right hand side

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3

Knudsen, G. M., K. D. Pettigrew, C. S. Patlak, and O. B. Paulson. "Blood-brain barrier permeability measurements by double-indicator method using intravenous injection." American Journal of Physiology-Heart and Circulatory Physiology 266, no. 3 (1994): H987—H999. http://dx.doi.org/10.1152/ajpheart.1994.266.3.h987.

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The double-indicator technique with intracarotid bolus injection is useful for the estimation of transfer rates across the human blood-brain barrier. A method using intravenous tracer injection is developed whereby the input is measured at a peripheral artery and the output is measured at the jugular vein. To correct for differences in the brain input of test and reference substances, a five-parameter Dirac impulse response for passage through the cerebrovascular bed is computed from the input and output of the reference substance. This response is then combined with a capillary model of the b

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4

Ng, Kam, Vladimir Nazarov, Sergey Kuchinsky, Aramais Zakharian, and Ming-Jun Li. "Analysis of Crosstalk in Multicore Fibers: Statistical Distributions and Analytical Expressions." Photonics 10, no. 2 (2023): 174. http://dx.doi.org/10.3390/photonics10020174.

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We present a study of multicore fiber (MCF) crosstalk using the coupled mode theory. We derived a general closed-form simulation formula for the crosstalk of MCF under random perturbations, which includes both the average crosstalk and the crosstalk statistical distribution. From this general formula, we further derived simple analytical expressions for the average crosstalk under the assumption of exponential distribution of fiber segment lengths. We show that the analytical expressions approximate very well the results for other distributions, such as Dirac and Gaussian, and thus they can be

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5

Sun, Bingbing, and Tariq Alkhalifah. "Adaptive traveltime inversion." GEOPHYSICS 84, no. 4 (2019): U13—U29. http://dx.doi.org/10.1190/geo2018-0595.1.

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We have developed a method to obtain a misfit function for robust waveform inversion. In this method, called adaptive traveltime inversion (ATI), a matching filter that matches predicted data to measured data is computed. If the velocity model is relatively accurate, the resulting matching filter is close to a Dirac delta function. Its traveltime shift, which characterizes the defocusing of the matching filter, is computed by minimization of the crosscorrelation between a penalty function such as [Formula: see text] and the matching filter. ATI is constructed by minimization of the least-squar

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6

LAGODIIENKO, Volodymyr, and Vitalii Kostylianu. "Domestic government loans as a modern investment trend in the system of international and national movement of capital transfer: challenges and prospects." Actual problems of innovative economy, no. 2020/3 (June 25, 2020): 85–90. http://dx.doi.org/10.36887/2524-0455-2020-3-15.

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Introduction. The article is devoted to substantiation and comprehension of the concept of investments in modern economic conditions. Modern research in world economics does not have a clearly defined concept of investment, because this concept should take into account not only its types, but also the depth of understanding of this process, its dynamism in the modern world. The mechanism of the investment process is to be clear and transparent for everyone who chooses any direc-tion for investment. The purpose of the article is to analyze the theoretical and methodological aspects of investmen

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7

Leng, Haitao. "Analysis of an HDG method for the Navier-Stokes equations with Dirac measures." ESAIM: Mathematical Modelling and Numerical Analysis, September 11, 2022. http://dx.doi.org/10.1051/m2an/2022068.

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In two dimensions, we analyze a hybridized discontinuous Galerkin (HDG) method for the Navier-Stokes equations with Dirac measures. The approximate velocity field obtained by the HDG method is shown to be pointwise divergence-free and $H$(div)-conforming. Under a smallness assumption on the continuous and discrete solutions, a posteriori error estimator, that provides an upper bound for the $L^2$-norm in the velocity, is proposed in the convex domain. In the polygonal domain, reliable and efficient a posteriori error estimator for the $W^{1,q}$-seminorm in the velocity and $L^q$-norm in the pr

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Дисертації з теми "Dirac measures estimation"

1

Laville, Bastien. "Reconstruction sans-grille de courbes : théorie et applications en microscopie de fluorescence." Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ4062.

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Анотація:

Cette thèse de doctorat se propose de définir et d'expliciter les outils pour la reconstruction de courbes par des méthodes variationnelles sans-grille dans une perspective d'applications en imagerie biomédicale, et plus précisément en microscopie de fluorescence.Plusieurs algorithmes numériques convexes ou non-convexes ont déjà été développés au sein de l'équipe de recherche Morpheme qui a accueilli cette thèse, dans le cadre de l'optimisation non convexe parcimonieuse. Ces techniques ont été développées dans le cas discret, sur grille, ce qui signifie que l'image super-résolue est définie su

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2

Lacouture, Loïc. "Modélisation et simulation du mouvement de structures fines dans un fluide visqueux : application au transport mucociliaire." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS139/document.

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Анотація:

Une grande part des muqueuses à l’intérieur du corps humain sont recouvertes de cils qui, par leurs mouvements coordonnés, conduisent à une circulation de la couche de fluide nappant la muqueuse. Dans le cas de la paroi interne des bronches, ce processus permet l’évacuation des impuretés inspirées à l’extérieur de l’appareil respiratoire.Dans cette thèse, nous nous intéressons aux effets du ou des cils sur le fluide, en nous plaçant à l’échelle du cil, et on considère pour cela les équations de Stokes incompressible. Due à la finesse du cil, une simulation directe demanderait un raffinement im

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