Results 11 to 20 of about 61,133 (171)
Steerable Discrete Cosine Transform [PDF]
IEEE Transactions on Image Processing, 2017 In image compression, classical block-based separable transforms tend to be inefficient when image blocks contain arbitrarily shaped discontinuities. For this reason, transforms incorporating directional information are an appealing alternative. In this paper, we propose a new approach to this problem, namely a discrete cosine transform (DCT) that can ...
FRACASTORO, GIULIA +2 more
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Discrete transforms and orthogonal polynomials of (anti)symmetric multivariate cosine functions [PDF]
SIAM J. Numer. Anal. 52-6 (2014), pp. 3021-3055, 2014 The discrete cosine transforms of types V--VIII are generalized to the antisymmetric and symmetric multivariate discrete cosine transforms. Four families of discretely and continuously orthogonal Chebyshev-like polynomials corresponding to the antisymmetric and symmetric generalizations of cosine functions are introduced.
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Cosine effect in ocean models [PDF]
Discrete & Continuous Dynamical Systems - B, 2010 This works aims at studying the impact of the cosine terms of the Coriolis force, that are usually neglected in geophysical fluid dynamics, leading to the so-called traditional approximation. Mathematical well-posedness arguments for simplified models, as well as numerical simulations, are presented in order to suggest the use of these terms in large ...
Lucas, Carine, Rousseau, Antoine
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A Remark on Cosine Families [PDF]
Proceedings of the American Mathematical Society, 1980 Let C ( t ) , t ∈ R C(t),t \in R , be a strongly continuous cosine family and A its infinitesimal generator. Then the set E = d e f {
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The stability of the cosine equation [PDF]
Proceedings of the American Mathematical Society, 1980 If δ > 0 \delta > 0 , G is an abelian group and f is a complex-valued function defined on G such that | f ( x + y ) + f ( x − y ) − 2 f ( x ) f (
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Hyperbolic cosine function in physics [PDF]
European Journal of Physics, 2020 Abstract A catenary is the shape that an electric cable takes under its own weight if suspended only at its ends between two pylons. A rope hung between two masts is also described with a catenary equation which is based on the hyperbolic cosine function.
Bonnet, Isabelle, Gabelli, Julien
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Nigerian Journal of Technological Research, 2013 The discrete cosine transform (DCT), introduced by Ahmed, Natarajan and Rao, has been used in many applications of digital signal processing, data compression and information hiding. There are four types of the discrete cosine transform. In simulating the discrete cosine transform, we propose a generalized discrete cosine transform with three ...
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Integrated cosine functions [PDF]
International Journal of Mathematics and Mathematical Sciences, 1994 In order to the second order Cauchy problem (CP2) : x″(t) = Ax(t), x(0) = x ∈ D(An), x″(0) = y ∈ D(Am) on a Banach space, Arendt and Kellermann recently introduced the integrated cosine function. This paper is concerned with its basic theory, which contain some properties, perturbation and approximation theorems, the relationship to analytic integrated
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A concise proof of Oppenheim's double inequality relating to the cosine and sine functions [PDF]
Feng Qi, Qiu-Ming Luo, and Bai-Ni Guo, A simple proof of
Oppenheim's double inequality relating to the cosine and sine functions,
Journal of Mathematical Inequalities 6 (2012), no. 4, 645--654, 2009 In this paper, we provide a concise proof of Oppenheim's double inequality relating to the cosine and sine functions. In passing, we survey this topic.
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