Results 1 to 10 of about 2,964,590 (287)

Modelling line edge roughness in periodic line-space structures by Fourier optics to improve scatterometry [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
In the present paper, we propose a 2D-Fourier transform method as a simple and efficient algorithm for stochastical and numerical studies to investigate the systematic impacts of line edge roughness on light diffraction pattern of periodic line-space ...
Gross H.   +5 more
doaj   +1 more source

On Local Unique Solvability for a Class of Nonlinear Identification Problems

open access: yesAxioms, 2023
Nonlinear identification problems for evolution differential equations, solved with respect to the highest-order Dzhrbashyan–Nersesyan fractional derivative, are studied.
Vladimir E. Fedorov   +2 more
doaj   +1 more source

Disentangling the Information in Species Interaction Networks

open access: yesEntropy, 2021
Shannon’s entropy measure is a popular means for quantifying ecological diversity. We explore how one can use information-theoretic measures (that are often called indices in ecology) on joint ensembles to study the diversity of species interaction ...
Michiel Stock   +2 more
doaj   +1 more source

Assessment of Students’ Achievements and Competencies in Mathematics Using CART and CART Ensembles and Bagging with Combined Model Improvement by MARS

open access: yesMathematics, 2020
The aim of this study is to evaluate students’ achievements in mathematics using three machine learning regression methods: classification and regression trees (CART), CART ensembles and bagging (CART-EB) and multivariate adaptive regression splines ...
Snezhana Gocheva-Ilieva   +2 more
doaj   +1 more source

Analytic Resolving Families for Equations with the Dzhrbashyan–Nersesyan Fractional Derivative

open access: yesFractal and Fractional, 2022
In this paper, a criterion for generating an analytic family of operators, which resolves a linear equation solved with respect to the Dzhrbashyan–Nersesyan fractional derivative, via a linear closed operator is obtained.
Vladimir E. Fedorov   +2 more
doaj   +1 more source

Topics in Mathematical Analysis [PDF]

open access: yes, 2008
Complex Variables and Potential Theory: Integral Representations in Complex, Hypercomplex and Clifford Analysis (H Begehr) Nonlinear Potential Theory in Metric Spaces (O Martio) Differential Equations and Nonlinear Analysis: Geometric Evolution Problems (G Bellettini) Introduction to Bifurcation Theory (P Drabek) Nonlinear Eigenvalue Problems (P ...
CIATTI, PAOLO   +3 more
openaire   +4 more sources

On Local Time for Telegraph Processes

open access: yesMathematics, 2023
The article consists of an introduction into the theory of passage times associated with telegraph processes. Local time for the telegraph process is defined and analysed. We provide some limited results for telegraphic local times.
Nikita Ratanov, Mikhail Turov
doaj   +1 more source

Mathematical Analysis of Ultrafast Ultrasound Imaging [PDF]

open access: yes, 2016
This paper provides a mathematical analysis of ultrafast ultrasound imaging. This newly emerging modality for biomedical imaging uses plane waves instead of focused waves in order to achieve very high frame rates.
Alberti, Giovanni S.   +3 more
core   +2 more sources

Modelling car-following dynamics with stochastic input-state-output port-Hamiltonian systems [PDF]

open access: yesEPJ Web of Conferences
In this contribution, we introduce a general class of car-following models with an input-state-output port-Hamiltonian structure. We derive stability conditions and long-term behavior of the finite system with periodic boundaries and quadratic ...
Ackermann Julia   +3 more
doaj   +1 more source

On Strongly Continuous Resolving Families of Operators for Fractional Distributed Order Equations

open access: yesFractal and Fractional, 2021
The aim of this work is to find by the methods of the Laplace transform the conditions for the existence of a strongly continuous resolving family of operators for a linear homogeneous equation in a Banach space with the distributed Gerasimov–Caputo ...
Vladimir E. Fedorov, Nikolay V. Filin
doaj   +1 more source

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