Results 61 to 70 of about 64,345 (264)

Even Orientations and Pfaffian graphs [PDF]

open access: yesBull. ICA, 2015
We give a characterization of Pfaffian graphs in terms of even orientations, extending the characterization of near bipartite non--pfaffian graphs by Fischer and Little \cite{FL}. Our graph theoretical characterization is equivalent to the one proved by Little in \cite{L73} (cf. \cite{LR}) using linear algebra arguments.
Abreu M.   +3 more
openaire   +5 more sources

NFDI MatWerk Ontology (MWO): A BFO‐Compliant Ontology for Research Data Management in Materials Science and Engineering

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the NFDI‐MatWerk Ontology (MWO), a Basic Formal Ontology‐based framework for interoperable research data management in materials science and engineering (MSE). Covering consortium structures, research data management resources, services, and instruments, MWO enables semantic integration, Findable, Accessible, Interoperable, and ...
Hossein Beygi Nasrabadi   +4 more
wiley   +1 more source

Research on the Construction and Applicationof Vertical Knowledge Graphs

open access: yesZhishi guanli luntan, 2016
[Purpose/significance]In recent years, knowledge graphs have gained wide attention from academia and industry. Knowledge graphs of different domains are widely used in query understanding, automatic question answering and document representation. [Method/
Ruan Tong, WangMengjie, Wang Haofen, HuFanghuai
doaj   +1 more source

On cyclically orientable graphs

open access: yesDiscrete Mathematics, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

On the oriented chromatic index of oriented graphs [PDF]

open access: yesJournal of Graph Theory, 2007
AbstractA homomorphism from an oriented graph G to an oriented graph H is a mapping $\varphi$ from the set of vertices of G to the set of vertices of H such that $\buildrel {\longrightarrow}\over {\varphi (u) \varphi (v)}$ is an arc in H whenever $\buildrel {\longrightarrow}\over {uv}$ is an arc in G. The oriented chromatic index of an oriented graph G
Pascal Ochem   +2 more
openaire   +2 more sources

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

open access: yesAdvanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora   +4 more
wiley   +1 more source

Interactive Graph Data Integration System With Spatial-Oriented Visualization and Feedback-Driven Provenance

open access: yesIEEE Access, 2019
This paper proposes new techniques in a visualization-enabled graph data quality assessment and alignment system leveraging feedback-driven provenance with goal of improving scalability, reducing execution time, and increasing relevance.
Kuldeep Reddy
doaj   +1 more source

Maximal Orientations of Graphs

open access: yesThe Electronic Journal of Linear Algebra, 2020
Orientations of connected graphs that maximize the spectral norm of the adjacency matrix are studied, and a conjecture of Hoppen, Monsalve and Trevisan is solved.
openaire   +3 more sources

On the orientation of graphs and hypergraphs

open access: yesDiscrete Applied Mathematics, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
András Frank   +2 more
openaire   +1 more source

Completing orientations of partially oriented graphs [PDF]

open access: yesJournal of Graph Theory, 2017
AbstractWe initiate a general study of what we call orientation completion problems. For a fixed class of oriented graphs, the orientation completion problem asks whether a given partially oriented graph P can be completed to an oriented graph in by orienting the (nonoriented) edges in P.
Jørgen Bang-Jensen   +2 more
openaire   +2 more sources

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