Results 41 to 50 of about 1,361,107 (277)

Comparing the Topological and Electrical Structure of the North American Electric Power Infrastructure

open access: yes, 2011
The topological (graph) structure of complex networks often provides valuable information about the performance and vulnerability of the network. However, there are multiple ways to represent a given network as a graph.
Barrows, Clayton   +3 more
core   +1 more source

Signless Laplacian spectrum of power graphs of finite cyclic groups

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
In this paper, we have studied the Signless Laplacian spectrum of the power graph of finite cyclic groups. We have shown that is an eigen value of Signless Laplacian of the power graph of with multiplicity at least In particular, using the theory of ...
Subarsha Banerjee, Avishek Adhikari
doaj   +1 more source

The power graph of a torsion-free group determines the directed power graph [PDF]

open access: yesDiscrete Applied Mathematics, 2021
The directed power graph $\vec{\mathcal G}(\mathbf G)$ of a group $\mathbf G$ is the simple digraph with vertex set $G$ such that $x\rightarrow y$ if $y$ is a power of $x$. The power graph of $\mathbf G$, denoted with $\mathcal G(\mathbf G)$, is the underlying simple graph. In this paper, for groups $\mathbf G$ and $\mathbf H$, the following is proved.
openaire   +3 more sources

On groups with specified quotient power graphs [PDF]

open access: yesInternational Journal of Group Theory, 2016
. In this paper we study some relations between the power andquotient power graph of a finite group. These interesting relations motivateus to find some graph theoretical properties of the quotient power graphand the proper quotient power graph of a ...
Mostafa Shaker, Mohammadali Iranmanesh
doaj  

Similarity matching method of power distribution system operating data based on neural information retrieval

open access: yesGlobal Energy Interconnection, 2023
Operation control of power systems has become challenging with an increase in the scale and complexity of power distribution systems and extensive access to renewable energy.
Kai Xiao   +4 more
doaj   +1 more source

Graph Powering and Spectral Robustness

open access: yesSIAM Journal on Mathematics of Data Science, 2020
Spectral algorithms, such as principal component analysis and spectral clustering, typically require careful data transformations to be effective: upon observing a matrix $A$, one may look at the spectrum of $ (A)$ for a properly chosen $ $. The issue is that the spectrum of $A$ might be contaminated by non-informational top eigenvalues, e.g., due to
Abbe, Emmanuel   +3 more
openaire   +2 more sources

Boxicity and Cubicity of Product Graphs

open access: yes, 2013
The 'boxicity' ('cubicity') of a graph G is the minimum natural number k such that G can be represented as an intersection graph of axis-parallel rectangular boxes (axis-parallel unit cubes) in $R^k$.
Chandran, L. Sunil   +3 more
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

open access: yesFEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi   +5 more
wiley   +1 more source

Review of the Application of Graph Database and Graph Computing in Power System Dispatch and Operation

open access: yesZhongguo dianli
As the widespread integration of new energy and interconnection of large power grids, the operation modes of power systems are undergoing transformations, which leads to a fast surge in data volumes and higher demands for real-time information processing,
Pei ZHANG   +8 more
doaj   +1 more source

Automorphism group of certain power graphs of finite groups

open access: yesElectronic Journal of Graph Theory and Applications, 2017
The power graph $\mathcal{P}(G)$ of a group $G$ is the graphwith group elements as vertex set and two elements areadjacent if one is a power of the other. The aim of this paper is to compute the automorphism group of the power graph of several well-known
Ali Reza Ashrafi   +2 more
doaj   +1 more source

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