Results 1 to 10 of about 18,207 (135)

Wideband 1-Bit Bandpass Delta Sigma Modulator Using Elliptic Filter in Noise Transfer Function

IEEE Access, 2022
A 1-bit band-pass delta-sigma modulator (BP-DSM), which utilizes oversampling technology, allows a modulated signal to be directly output by using a high-speed 1-bit digital pulse train, thus realizing miniaturization of transmitters.
Takashi Maehata, Noriharu Suematsu
doaj   +1 more source

On property-( R ₁ ) and relative Chebyshev centers in Banach spaces-II

Quaestiones Mathematicae, 2023
We continue to study (strong) property-$(R_1)$ in Banach spaces. As discussed by Pai \& Nowroji in [{\it On restricted centers of sets}, J. Approx. Theory, {\bf 66}(2), 170--189 (1991)], this study corresponds to a triplet $(X,V,\mathcal{F})$, where $X$ is a Banach space, $V$ is a closed convex set, and $\mathcal{F}$ is a subfamily of closed ...
Das, Syamantak, Paul, Tanmoy
openaire   +4 more sources

Relative Chebyshev centers in normed linear spaces, I

Journal of Approximation Theory, 1980
AbstractLet E be a normed linear space, A a bounded set in E, and G an arbitrary set in E. The relative Chebyshev center of A in G is the set of points in G best approximating A. We have obtained elsewhere general results characterizing the spaces in which the center reduces to a singleton in terms of structural properties related to uniform and strict
Amir, Dan, Ziegler, Zvi
openaire   +2 more sources

Multidomain Spectral Method for the Helically Reduced Wave Equation [PDF]

, 2007
We consider the 2+1 and 3+1 scalar wave equations reduced via a helical Killing field, respectively referred to as the 2-dimensional and 3-dimensional helically reduced wave equation (HRWE). The HRWE serves as the fundamental model for the mixed-type PDE
Adams, Alpert, Andrade, Baker, Beckman, Beetle, Boyd, Bromley, Bîlă, Campanelli, Campanelli, Caughey, Chaohao, Coutsias, Coutsias, Demmel, Ern, Ern, Frankl, Friedrichs, Hagstrom, Hagstrom, Hesthaven, Katsanis, Katsanis, Kelley, Lau, Liu, Morawetz, Morawetz, Morawetz, Murman, Murman, Otway, Pfeiffer, Pretorius, Price, Protter, Protter, Richard H. Price, Rivlin, Scheel, Stephen R. Lau, Thompson, Torre, Torre, Tricomi, von Winckel, Whelan, Whelan   +49 more
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On convergence of convex sets and relative Chebyshev centers

Journal of Approximation Theory, 1990
For a Banach space X denote by CB(X) the family of all nonvoid closed bounded subsets of X equipped with the Hausdorff topology \(\tau_ H\), and by CC(X) the family of all nonvoid closed convex subsets of X equipped with a weaker topology \(\tau_ M\), called the Mosco topology [\textit{U. Mosco}, Adv. Math. 3, 510-585 (1969; Zbl 0192.491)].
BEER, G, PAI, D
openaire   +3 more sources

Semi-spectral Chebyshev method in Quantum Mechanics [PDF]

, 2006
Traditionally, finite differences and finite element methods have been by many regarded as the basic tools for obtaining numerical solutions in a variety of quantum mechanical problems emerging in atomic, nuclear and particle physics, astrophysics ...
A. Deloff, Boyd, Brysk, Clenshaw, Darewych, Drukarev, Durand, El-gendi, Flüge, Fornberg, Gonzales, Hasegawa, Heddle, Hulthén, Kang, Kang, Koval, Kwon, Lam, Lambert, Liu, Mason, Mihaila, Morse, Morse, Noble, Noble, Olson, Omnes, Pang, Press, Rawitscher, Rivlin, Sloan, van Dijk   +34 more
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Spectral Methods for Numerical Relativity. The Initial Data Problem [PDF]

, 1999
Numerical relativity has traditionally been pursued via finite differencing. Here we explore pseudospectral collocation (PSC) as an alternative to finite differencing, focusing particularly on the solution of the Hamiltonian constraint (an elliptic ...
Finn, Lee Samuel, Kidder, Lawrence E.
core   +2 more sources

Spectral functions and time evolution from the Chebyshev recursion [PDF]

, 2015
We link linear prediction of Chebyshev and Fourier expansions to analytic continuation. We push the resolution in the Chebyshev-based computation of $T=0$ many-body spectral functions to a much higher precision by deriving a modified Chebyshev series ...
Justiniano, Jorge A., McCulloch, Ian P., Schollwöck, Ulrich, Wolf, F. Alexander   +3 more
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On the Hausdorff measure of non-compactness for the parametrized Prokhorov metric [PDF]

, 2016
We quantify Prokhorov's Theorem by establishing an explicit formula for the Hausdorff measure of non-compactness (HMNC) for the parametrized Prokhorov metric on the set of Borel probability measures on a Polish space.
Berckmoes, Ben
core   +3 more sources

Low power CMOS iImage sensor for face recognition [PDF]

, 2020
Imaging system is suitable for different purposes, depending upon their final application. Digital cameras, camcorders, webcams, security cameras or infrared (IR) cameras are well-known imaging systems.
Chan, Kit Heng, Ruslan, Siti Hawa
core