Results 11 to 20 of about 2,598,279 (194)

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

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

A mathematical analysis of glacier surges. [PDF]

open access: yes, 1989
. This paper describes the phenomena of glacier surges and presents a mathematical model based on realistic descriptions of glacier physics, which purports to describe the main features of the flow.
Fowler, A. C.
core   +2 more sources

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

Equivalent Electrical Circuits and Their Use Across Electrochemical Impedance Spectroscopy Application Domains

open access: yesIEEE Access, 2022
When studying electrochemical systems, EIS practitioners face the challenge of choosing a relevant equivalent electrical circuit to analyze their measurement data and interpreting the role of its components.
Maxime Van Haeverbeke   +2 more
doaj   +1 more source

A comprehensive overview of genomic imprinting in breast and its deregulation in cancer

open access: yesNature Communications, 2018
In growth and development genomic imprinting is important in regulating gene expression. Here, the authors study loss of imprinting (LOI) in cancer, developing a mixture model to detect monoallelically expressed loci without genotyping data - applying ...
Tine Goovaerts   +6 more
doaj   +1 more source

Understanding Slow Feature Analysis: A Mathematical Framework [PDF]

open access: yes, 2008
Slow feature analysis is an algorithm for unsupervised learning of invariant representations from data with temporal correlations. Here, we present a mathematical analysis of slow feature analysis for the case where the input-output functions are not ...
Sprekeler, Henning   +1 more
core   +1 more source

The plot thickens: The aesthetic dimensions of a captivating mathematics lesson [PDF]

open access: yes, 2018
We present an analysis of a sixth-grade mathematics lesson in which an aesthetically-rich moment of mathematical surprise, inspired by a decontextualized integer addition problem, spurred students to ask mathematical questions and actively sustain ...
Dietiker, Leslie   +2 more
core   +1 more source

Global Perturbation of Nonlinear Eigenvalues

open access: yesAdvanced Nonlinear Studies, 2021
This paper generalizes the classical theory of perturbation of eigenvalues up to cover the most general setting where the operator surface 𝔏:[a,b]×[c,d]→Φ0⁢(U,V){\mathfrak{L}:[a,b]\times[c,d]\to\Phi_{0}(U,V)}, (λ,μ)↦𝔏⁢(λ,μ){(\lambda,\mu)\mapsto\mathfrak ...
López-Gómez Julián   +1 more
doaj   +1 more source

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