Results 11 to 20 of about 17,940 (252)
Acoustics, 2022 In the presented article we have investigated the variation of the sound pressure level in characteristic areas around an element of an acoustic barrier with an elliptical shape at different frequencies (from 100 Hz to 2000 Hz).
Krasimir Nedelchev +3 more
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Ellipses, near ellipses, and harmonic Möbius transformations [PDF]
Proceedings of the American Mathematical Society, 2005 It is shown that an analytic function taking circles to ellipses must be a Möbius transformation. It then follows that a harmonic mapping taking circles to ellipses is a harmonic Möbius transformation.
Chuaqui, M, Duren, P, Osgood, B
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Classification and Visualization of Power Quality Disturbance-Events Using Space Vector Ellipse in Complex Plane [PDF]
, 2021 This article proposes a novel algorithm employing space vector ellipse (SVE) in a complex plane to classify and visualize power quality disturbance-events (PQDEs). In the proposed method, at first, the time-domain signal and a reference signal, which are
Yan, R, Saha, TK, Alam, MR, Bai, F
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A short history of the form of octagonal and elliptical city squares
Technical Transactions, 2021 The article starts with the short discussion of two geometrical figures, i.e., octagon and ellipse, their genesis in architecture and urban design, and the examples of buildings whose plans were based upon them.
Motak Maciej, Woźniczka Magdalena
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Indústrias Culturais, 2007 A Fundação Ellipse tem uma colecção de arte contemporânea situada na rua das Fisgas, Pedra Furada, em Alcoitão, Cascais.Trata-se de um antigo armazém (perto de 20 mil metros quadrados), inaugurado em Maio de 2006 para esta nova função, com salas de ...
Rogério Santos
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Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2020 Based on the airborne geophysical data, the anomalies of the natural radioactive element (NRE) ratio values above a background level are determined for different types of metasomatites in Priamurye.
Володькова Т.В.
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Buildings, 2021 The aim of this article is to orient the evolution of new architectural forms offering up-to-date scientific support. Unlike the volume, the expression for the lateral area of a regular conoid has not yet been obtained by means of direct integration or a
Joseph Cabeza-Lainez
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Application of the Fisher-Rao metric to ellipse detection [PDF]
, 2007 The parameter space for the ellipses in a two dimensional image is a five dimensional manifold, where each point of the manifold corresponds to an ellipse in the image. The parameter space becomes a Riemannian manifold under a Fisher-Rao metric, which is
Stephen J. Maybank, Maybank, Stephen J.
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On a Certain Functional Equation and Its Application to the Schwarz Problem
Mathematics, 2023 The Schwarz problem for J-analytic functions in an ellipse is considered. In this case, the matrix J is assumed to be two-dimensional with different eigenvalues located above the real axis.
Vladimir Nikolaev, Vladimir Vasilyev
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Nature, 1920 THE following approximate formula for finding the perimeter of a fairly flat ellipse may be found practically useful. Suppose a = 1, then the length of a quadrant of the ellipse is nearly where a is the major, and b the minor, axis. The formula works best from about b = 0·2 to b = 0·5, after which the formula of Boussinesq is more accurate, viz.
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