scholarly journals The spectral theory of graphs at researches of fuzzy models of the determined regular structures of network information systems

2020 ◽  
Vol 1479 ◽  
pp. 012069
Author(s):  
A Mezhuev
Keyword(s):  
Information Systems ◽  
Spectral Theory ◽  
Network Information ◽  
Fuzzy Models ◽  
Regular Structures ◽  
Theory Of Graphs

A Security Power Defense System Based on Cloud Computing

2014 ◽  
Vol 701-702 ◽  
pp. 919-922
Author(s):  
Hong Fei Xu ◽  
Si Rui Pang ◽  
Jian Wen Du ◽  
Xue Mei Li
Keyword(s):  
Information Systems ◽  
Information Security ◽  
Information Network ◽  
Secondary System ◽  
Network Systems ◽  
Network Scheduling ◽  
Network Partition ◽  
Network Information ◽  
System Information ◽  
Set Up

A system includes three power information security defense line is constructed, to achieve the information network, information outside the network, scheduling data network depth protection. According to the information security protection requirements, starting from the overall structure of information systems, taking into account the information system to schedule production system as the core, based on independent research and development of core information security isolation unit, set up three lines of defense in the power of information systems, electricity secondary system, information network systems, information systems outside the network partition protection.

scholarly journals Towards a spectral theory of graphs based on the signless Laplacian, I

2009 ◽  
Vol 85 (99) ◽  
pp. 19-33 ◽  
Author(s):  
Dragos Cvetkovic ◽  
Slobodan Simic
Keyword(s):  
Graph Theory ◽  
Spectral Theory ◽  
Spectral Graph Theory ◽  
Line Graphs ◽  
Regular Graphs ◽  
Spectral Graph ◽  
Q Theory ◽  
Signless Laplacian ◽  
M Theory ◽  
Theory Of Graphs

A spectral graph theory is a theory in which graphs are studied by means of eigenvalues of a matrix M which is in a prescribed way defined for any graph. This theory is called M-theory. We outline a spectral theory of graphs based on the signless Laplacians Q and compare it with other spectral theories, in particular with those based on the adjacency matrix A and the Laplacian L. The Q-theory can be composed using various connections to other theories: equivalency with A-theory and L-theory for regular graphs, or with L-theory for bipartite graphs, general analogies with A-theory and analogies with A-theory via line graphs and subdivision graphs. We present results on graph operations, inequalities for eigenvalues and reconstruction problems.

scholarly journals Spectral Sufficient Conditions on Pancyclic Graphs

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Guidong Yu ◽  
Tao Yu ◽  
Xiangwei Xia ◽  
Huan Xu
Keyword(s):  
Spectral Radius ◽  
Spectral Theory ◽  
Sufficient Conditions ◽  
Laplacian Spectral Radius ◽  
Signless Laplacian Spectral Radius ◽  
Signless Laplacian ◽  
Np Complete ◽  
Pancyclic Graphs ◽  
Theory Of Graphs ◽  
Spectrum Of Graphs

A pancyclic graph of order n is a graph with cycles of all possible lengths from 3 to n . In fact, it is NP-complete that deciding whether a graph is pancyclic. Because the spectrum of graphs is convenient to be calculated, in this study, we try to use the spectral theory of graphs to study this problem and give some sufficient conditions for a graph to be pancyclic in terms of the spectral radius and the signless Laplacian spectral radius of the graph.

scholarly journals Analysis of Power Network Behavior Security Analysis Technology

2018 ◽  
Vol 246 ◽  
pp. 03017
Author(s):  
Kai Fan ◽  
Hang Yang ◽  
Aidong Xu
Keyword(s):  
Information Technology ◽  
Information System ◽  
Information Systems ◽  
Information Security ◽  
Power Systems ◽  
Power System ◽  
Rapid Development ◽  
Social Needs ◽  
Power Network ◽  
Network Information

Nowadays, with the rapid development of science and technology, network information technology is widely applied to various enterprise departments. In order to meet the increasing social needs, power companies have also built power network information systems. The establishment of the network information system has been put into use, which has greatly improved the efficiency of the power enterprise. However, the security risks of network information systems have followed. Once the network is damaged by the attack, it will cause the power system to fail to operate normally, which will inevitably cause significant losses. Power system information security issues threaten the security of the power system and the entire power industry. Studying the information security of power systems, how to protect the power information network from threats, how to ensure the safe and stable supply of electricity to the whole society, and striving to develop a safe and effective power network information system is an important issue facing the development of information technology.

IOIS and Interfirm Networks - Interdependents and Managerial Challenges

2005 ◽  
pp. 170-213 ◽  
Author(s):  
Stefan Klein ◽  
Angeliki Poulymenakou ◽  
Kai Riemer ◽  
Dimitris Papakiriakopoulos ◽  
Marcel Gogolin ◽  
...  
Keyword(s):  
Information Systems ◽  
Network Management ◽  
Information Management ◽  
Organizational Setting ◽  
Network Information ◽  
Interfirm Networks ◽  
Organizational Information ◽  
Organizational Relations ◽  
Management Issues

Inter-organizational information systems (IOIS) are information systems (ISs) embedded or deployed in inter-organizational relations. Predominantly, these inter-organizational relations can be qualified as interfirm networks. In order to understand the specific challenges of designing and running ISs in an inter-organizational setting, we will use and expand the notion of information management, which focuses on the information and systems dimensions of IOIS, and we will use a framework which structures and classifies network management issues. While network information management (NIM) primarily addresses managerial issues of IOISs, it does so in the broader context of network management.

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