Results 71 to 80 of about 1,498,288 (136)
On differential operators an differential equations on torus
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2018 In this paper, we consider periodic boundary value problems for a differential equation whose coefficients are trigonometric polynomials. The spaces of generalized functions are constructed, in which the problems considered have solutions, in particular,
Vladimir P Burskii
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Rational polynomial windows with high attenuation of sidelobes [PDF]
, 2012 In the paper the idea of rational polynomial windows optimised towards low level of Fourier spectrum's sidelobes is presented. A relevant advantage of the polynomial windows family and their modifications is their ability to easily change their ...
Okarma, K.
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Engineering ReportsEnsuring reliable signal detection and accurate channel estimation is fundamental to the success of modern communication systems. While various methods have been introduced to address these challenges, classical theoretical detection schemes primarily ...
Hamid Nourollahi +2 more
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Refined equivalent pinhole model for large-scale 3D reconstruction from spaceborne CCD imagery
International Journal of Applied Earth Observations and GeoinformationAutomatic 3D reconstruction from spaceborne charge-coupled device (CCD) optical imagery is still a challenge as the rational functional model (RFM) based reconstruction pipeline failed to amount to the advances of pinhole based approaches in computer ...
Danyang Hong +6 more
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Sparse Rational Polynomial Coefficient Estimation Method via Low-Rank Matrix Constraint
Remote SensingThe rational function model (RFM) is an important general imaging model in remote sensing image geometric processing, which is composed of many rational polynomial coefficients (RPCs). However, due to the correlation among the high-order polynomials, the
Congzhen Hu +5 more
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KOMPSAT-3 Digital Elevation Model Correction Based on Point-to-Surface Matching
Remote Sensing, 2019 In order to generate digital elevation models (DEMs) from high-resolution satellite images, the vendor-provided rational polynomial coefficients (RPCs) are commonly used.
Hyoseong Lee, Michael Hahn
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Sum of squares decomposition of positive polynomials with rational coefficients
Journal of Pure and Applied AlgebraWe present an example of a strictly positive polynomial with rational coefficients that can be decomposed as a sum of squares of polynomials over $\R$ but not over $\Q$. This answers an open question by C. Scheiderer posed as the second question in Section 5.1 of the paper Sums of squares of polynomials with rational coefficients (2012). We verify that
openaire +3 more sources
Abstract and Applied Analysis, 2011 In the case of the complex plane, it is known that there exists a finite set of rational numbers containing all possible growth orders of solutions of f(k)+ak-1(z)f(k-1)+⋯+a1(z)f′+a0(z)f=0 with polynomial coefficients.
Martin Chuaqui +3 more
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Computation of Galois group elements of a polynomial equation
, 1969 This note demonstrates the use of the computer for constructing elements of the Galois group over the rationals of a polynomial equation with rational coefficients.
E. J. Cockayne
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On the Orthogonality of q-Classical Polynomials of the Hahn Class
Symmetry, Integrability and Geometry: Methods and Applications, 2012 The central idea behind this review article is to discuss in a unified sense the orthogonality of all possible polynomial solutions of the q-hypergeometric difference equation on a q-linear lattice by means of a qualitative analysis of the q-Pearson ...
Renato Álvarez-Nodarse +2 more
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