Results 31 to 40 of about 36,965 (299)
Analytic solution of two-group static neutron diffusion equation using different transverse leakage approximations in 2D cartesian geometry [PDF]
مجله علوم و فنون هستهای, 2015 Nodal is a method for solving the neutron diffusion equation. It is categorized to analytic, semi-analytic and expansion nodal methods. In this research work, a software is developed in order to solve two group neutron diffusion equations in two ...
Mohammad Hosseini +2 more
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Approximation formulas related to Somos’ quadratic recurrence constant
Journal of Inequalities and Applications, 2018 We present two classes of asymptotic expansions related to Somos’ quadratic recurrence constant and provide the recursive relations for determining the coefficients of each class of the asymptotic expansions by using Bell polynomials and other techniques.
Bo Zhang, Chao-Ping Chen
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Science and Technology of Nuclear Installations, 2016 A three-dimensional, multigroup, diffusion code based on a high order nodal expansion method for hexagonal-z geometry (HNHEX) was developed to perform the neutronic analysis of hexagonal-z geometry.
Daogang Lu, Chao Guo
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Approximate *-derivations and approximate quadratic *-derivations on C*-algebras [PDF]
Journal of Inequalities and Applications, 2011 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Park Choonkil, Jang Sun
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C1 rational quadratic trigonometric spline
Egyptian Informatics Journal, 2013 A Bézier like C1 rational quadratic trigonometric polynomial spline is developed. It defines two shape parameters in each subinterval. The approximation and geometric properties are investigated. The curvature continuity is established.
Maria Hussain, Sidra Saleem
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Approximation of Quadratic Irrationals and Their Pierce Expansions [PDF]
The Fibonacci Quarterly, 1998 In this article two aims are pursued: on the one hand, to present a rapidly converging algorithm for the approximation of square roots; on the other hand and based on the previous algorithm, to find the Pierce expansions of a certain class of quadratic irrationals as an alternative way to the method presented in 1984 by J.O.
Jaume Paradís +2 more
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Hybrid Gravitational Search Algorithm Based on Fuzzy Logic
IEEE Access, 2017 Gravitational search algorithm (GSA) is a novel heuristic optimization algorithm which is used to search for the global optimal solution by iteration. However, GSA is easy to fall into local minima and convergence slowly.
Kun Qian, Wei Li, Weiyi Qian
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On Convex Approximation by Quadratic Splines
Journal of Approximation Theory, 1996 This note is devoted to giving a short and constructive proof for the existence of a \(C^1\) convex quadratic spline with \(n\) equidistant knots which approximates a convex function \(f\in C[0,1]\) at the order \(\omega_3(f,1/n)\). This improves a result due to \textit{Y. K. Hu} [J. Approximation Theory 74, No.
Ivanov, Kamen G., Popov, Boyan
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Discordance Between Patient and Physician Global Assessments in Early Systemic Sclerosis
Arthritis Care &Research, EarlyView.Objective This study aims to identify factors associated with patient global assessment (PtGA) and physician global assessment (PhGA) and discordance between them in systemic sclerosis (SSc). Methods Data from adults with early SSc (<5 years) from the Collaborative National Quality and Efficacy Registry were included.
Ellen Romich +35 more
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Renormalized phonon spectrum in the Su–Schrieffer–Heeger model
JPhys Materials, 2023 Motivated to understand phonon spectrum renormalization in the ground state of the half-filled Su–Schrieffer–Heeger model, we use the Born–Oppenheimer approximation together with the harmonic approximation to evaluate semi-analytically the all-to-all ...
Stepan Fomichev, Mona Berciu
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