Results 11 to 20 of about 575,024 (233)

Electronic, structural and optical properties of zincblend and wurtizite cadmium selenide (CdSe) using density functional theory and hubbard correction

open access: yesФізика і хімія твердого тіла, 2021
Zinc blend (zb) and wurtizite (wz) structure of cadmium selenide (CdSe) is determined using density-functional theory within local density approximation (LDA), generalized gradient approximation (GGA), Hubbard-correction (GGA+U) and Hybrid functional ...
Teshome Gerbaba Edossa   +1 more
doaj   +1 more source

ON ENTIRE FUNCTIONS WITH GIVEN ASYMPTOTIC BEHAVIOR

open access: yesПроблемы анализа, 2018
We study approximation of subharmonic functions on the complex plane by logarithms of moduli of entire functions. In the theory of series of exponentials these entire functions are the main tool.
Isaev K . P .
doaj   +1 more source

The Voigt and complex error function: Huml\'i\v{c}ek's rational approximation generalized [PDF]

open access: yes, 2018
Accurate yet efficient computation of the Voigt and complex error function is a challenge since decades in astrophysics and other areas of physics.
Schreier, Franz
core   +2 more sources

Parameterization of 3D cloud geometry and a neural-network-based fast forward operator for polarized radiative transfer [PDF]

open access: yesAtmospheric Measurement Techniques
Clouds generally have a complex three-dimensional geometry. However, realistic three-dimensional radiative transfer simulations of clouds are computationally expensive, so most retrievals of cloud properties assume one-dimensional clouds, which ...
A. Weber, G. Köcher, B. Mayer
doaj   +1 more source

On the spectrum of the finite element approximation of a three field formulation for linear elasticity

open access: yesExamples and Counterexamples, 2022
We continue the investigation on the spectrum of operators arising from the discretization of partial differential equations. In this paper we consider a three field formulation recently introduced for the finite element least-squares approximation of ...
Linda Alzaben   +2 more
doaj   +1 more source

Helicity Asymmetry for Proton Emission from Polarized Electrons in the Eikonal Regime [PDF]

open access: yes, 1997
The nuclear response to longitudinally polarized electrons, detected in coincidence with out-of-plane high-energy protons, is discussed in a simple model where the ejectile wave function is approximated as a plane wave with a complex wave vector.
Bianconi, A., Radici, M.
core   +2 more sources

The aproximation of functions in generalized Holder spaces [PDF]

open access: yesComputer Science Journal of Moldova, 1996
The theorems of approximation of complex functions determined on the closed arbitrary contour Г of the complex plane by means of Lagrange interpolating polynomials in generalized Holder spaces Hw were obtained.
V. Zolotarevski, G. Andriesh
doaj  

Critical rotation of general-relativistic polytropic models simulating neutron stars: a post-Newtonian hybrid approximative scheme [PDF]

open access: yes, 2014
We develop a "hybrid approximative scheme" in the framework of the post-Newtonian approximation for computing general-relativistic polytropic models simulating neutron stars in critical rigid rotation. We treat the differential equations governing such a
Geroyannis, Vassilis S.   +1 more
core   +1 more source

Spin Observables in Coincidence Electron Scattering from Nuclei I: Reduced Response Functions [PDF]

open access: yes, 1998
A theoretical description of nucleon knockout reactions initiated by polarized electron scattering from polarized nuclei is presented. Explicit expressions for the complete set of reduced response functions (independent of the polarization angle) that ...
Amaro   +20 more
core   +2 more sources

Complex approximation by real approximation [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة
It is known that approximation of the complex functions does not, in general, depend on approximation of the real functions. However, if the complex function is viewed as a Cartesian product of two real functions, a relationship appears between the two ...
Jawad Judy
doaj   +1 more source

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