Results 11 to 20 of about 2,686,069 (331)

Relations between Spectrum Curves of Discrete Sturm-Liouville Problem with Nonlocal Boundary Conditions and Graph Theory. II

open access: yesLietuvos Matematikos Rinkinys, 2021
In this paper, relations between discrete Sturm--Liouville problem with nonlocal integral boundary condition characteristics (poles, critical points, spectrum curves) and graphs characteristics (vertices, edges and faces) were found. The previous article
Jonas Vitkauskas, Artūras Štikonas
doaj   +1 more source

A note on graph theory techniques for brain tumor detection [PDF]

open access: yesRomanian Journal of Neurology, 2022
Brain Tumors are detected in people of all age groups. It leads to various complications that are both physiological and psychological. Graph theory techniques are employed to study both functional and structural behavior of brain networks.
Yegnanarayanan Venkataraman
doaj   +1 more source

The Patterson function as auto-hologram and graph enables the direct solution to the phase problem for coherently illuminated atomistic structures

open access: yesNew Journal of Physics, 2021
The coherent Patterson function, derived from the coherent scattering intensities from N atoms, can be described as an auto-holographic image, i.e., the superposition of N -holographic images in which each atom serves as the source of a different ...
Irene Calvo-Almazán, Paul Fenter
doaj   +1 more source

An Analysis of the Use of Graphs in People’s Daily Life

open access: yesRevista Colombiana de Educación, 2021
This paper addresses the issue of the lack of connection between people’s knowledge and school mathematics. It is stated that this issue generates a phenomenon of opacity in People’s Daily Life and the uses of mathematical knowledge; this means that ...
José David Zaldívar-Rojas   +1 more
doaj   +1 more source

Information Inequalities via Submodularity and a Problem in Extremal Graph Theory

open access: yesEntropy, 2022
The present paper offers, in its first part, a unified approach for the derivation of families of inequalities for set functions which satisfy sub/supermodularity properties.
Igal Sason
doaj   +1 more source

Graph Analysis Using Fast Fourier Transform Applied on Grayscale Bitmap Images

open access: yesInformation, 2021
There is spiking interest in graph analysis, mainly sparked by social network analysis done for various purposes. With social network graphs often achieving very large size, there is a need for capable tools to perform such an analysis.
Pawel Baszuro, Jakub Swacha
doaj   +1 more source

A Visualization Tool for Flood Dynamics Monitoring Using a Graph-Based Approach

open access: yesRemote Sensing, 2020
Insights into flood dynamics, rather than solely flood extent, are critical for effective flood disaster management, in particular in the context of emergency relief and damage assessment.
Bos Debusscher   +2 more
doaj   +1 more source

Towards Inferring Influential Facebook Users

open access: yesComputers, 2021
Because of the complexity of the actors and the relationships between them, social networks are always represented by graphs. This structure makes it possible to analyze the effectiveness of the network for the social actors who are there.
Suleiman Ali Alsaif   +2 more
doaj   +1 more source

Leveraging Spatio-Temporal Graphs and Knowledge Graphs: Perspectives in the Field of Maritime Transportation

open access: yesISPRS International Journal of Geo-Information, 2021
This paper introduces a prospective study of the potential of spatio-temporal graphs (ST-graphs) and knowledge graphs (K-graphs) for the modelling of geographical phenomena.
Géraldine Del Mondo   +4 more
doaj   +1 more source

Kolmogorov Basic Graphs and Their Application in Network Complexity Analysis

open access: yesEntropy, 2021
Throughout the years, measuring the complexity of networks and graphs has been of great interest to scientists. The Kolmogorov complexity is known as one of the most important tools to measure the complexity of an object.
Amirmohammad Farzaneh   +2 more
doaj   +1 more source

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