Results 1 to 10 of about 91,257 (164)

The Clar formulas of a benzenoid system and the resonance graph

open access: yesDiscrete Applied Mathematics, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khaled Salem   +2 more
exaly   +3 more sources

Multimodal connectivity-based cortical segmentation with graph neural networks [PDF]

open access: yesFrontiers in Neuroscience
Due to the significant amount of time and expertise needed for manual segmentation of the brain cortex from magnetic resonance imaging (MRI) data, there is a substantial need for efficient and accurate algorithms to replace the need for human involvement.
Agata Łabiak   +4 more
doaj   +2 more sources

Functional connectome metrics reveal distinct prognostic subtypes in two Phase 3 gantenerumab trials [PDF]

open access: yesAlzheimer’s & Dementia: Translational Research & Clinical Interventions
INTRODUCTION Alzheimer's disease (AD) heterogeneity poses significant challenges for drug development, identification of individuals at risk, and treatment response prediction.
Susanna Gobbi   +5 more
doaj   +2 more sources

Resonance Graphs on Perfect Matchings of Graphs on Surfaces

open access: yesGraphs and Combinatorics, 2023
Let $G$ be a graph embedded in a surface and let $\mathcal F$ be a set of even faces of $G$ (faces bounded by a cycle of even length). The resonance graph of $G$ with respect to $\mathcal F$, denoted by $R(G;\mathcal F)$, is a graph such that its vertex set is the set of all perfect matchings of $G$ and two vertices $M_1$ and $M_2$ are adjacent to each
Niko Tratnik, Dong Ye 0002
openaire   +4 more sources

Outerplane Bipartite Graphs with Isomorphic Resonance Graphs

open access: yesDiscrete Applied Mathematics, 2023
We present novel results related to isomorphic resonance graphs of 2-connected outerplane bipartite graphs. As the main result, we provide a structure characterization for 2-connected outerplane bipartite graphs with isomorphic resonance graphs. Moreover, two additional characterizations are expressed in terms of resonance digraphs and via local ...
Simon Brezovnik   +3 more
openaire   +6 more sources

SYSTEM COMPLETENESS OF RESONANCE STATES FOR GRAPHS WITH DIFFERENT GEOMETRY [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
Resonant states (quasi-intrinsic functions) play an important role in the scattering problem and in the description of transportprocesses. We consider the system completeness of resonance states on a finite subgraph for quantum graphs with both finite ...
I. V. Blinova   +2 more
doaj   +1 more source

Onk-Resonant Fullerene Graphs [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2009
A fullerene graph $F$ is a 3-connected plane cubic graph with exactly 12 pentagons and the remaining hexagons. Let $M$ be a perfect matching of $F$. A cycle $C$ of $F$ is $M$-alternating if the edges of $C$ appear alternately in and off $M$. A set $\mathcal H$ of disjoint hexagons of $F$ is called a resonant pattern (or sextet pattern) if $F$ has a ...
Dong Ye 0002, Zhongbin Qi, Heping Zhang
openaire   +5 more sources

Smooth graph learning for functional connectivity estimation

open access: yesNeuroImage, 2021
Functional connectivity (FC) estimated from functional magnetic resonance imaging (fMRI) signals is important in understanding neural representation and information processing in cortical networks. However, due to a lack of ”ground truth” FC pattern, the
Siyuan Gao   +3 more
doaj   +1 more source

Diagnosis of Alzheimer’s Disease Using Brain Network

open access: yesFrontiers in Neuroscience, 2021
Recent studies suggest the brain functional connectivity impairment is the early event occurred in case of Alzheimer’s disease (AD) as well as mild cognitive impairment (MCI). We model the brain as a graph based network to study these impairment. In this
Ramesh Kumar Lama, Goo-Rak Kwon
doaj   +1 more source

Segmentation of Magnetic Resonance Brain Imaging Based on Graph Theory [PDF]

open access: yesIranian Journal of Medical Physics, 2020
Introduction: Segmentation of brain images especially from magnetic resonance imaging (MRI) is an essential requirement in medical imaging since the tissues, edges, and boundaries between them are ambiguous and difficult to detect, due to the proximity ...
S.Ehsan Razavi, Hamed Khodadadi
doaj   +1 more source

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