Results 81 to 90 of about 168,009,036 (204)

Some improved bounds on two energy-like invariants of some derived graphs

Open Mathematics, 2019
Given a simple graph G, its Laplacian-energy-like invariant LEL(G) and incidence energy IE(G) are the sum of square root of its all Laplacian eigenvalues and signless Laplacian eigenvalues, respectively. This paper obtains some improved bounds on LEL and
Cui Shu-Yu, Tian Gui-Xian
doaj   +1 more source

Strongly Regular Graphs with Maximal Energy [PDF]

The energy of a graph is the sum of the absolute values of the eigenvalues of its adjacency matrix. Koolen and Moulton have proved that the energy of a graph on n vertices is at most n(1 + √n)/2, and that equality holds if and only if the graph is ...
Haemers, W.H.
core  

2004 Office of Fossil Energy Fuel Cell Program Annual Report

, 2004
Annual report of fuel cell projects sponsored by Department of Energy, National Energy Technology ...
National Energy Technology Laboratory (U.S.)
core   +1 more source

On The ES Spectrum and ES Energy of Graph

Scientific Annals of Computer Science
In 2024, Gutman et al. [19] introduced the molecular descriptor called the Euler–Sombor (ES) index to analyze the graphical structure of a molecule. We define the corresponding Euler–Sombor matrix MES for a graph Γ as follows: The entry at position (i,j)-
Sopan Bansode, Sharad Barde , Ganesh Mundhe   +2 more
doaj   +1 more source

Office of Industrial Technologies (OIT): Profiles and Partnerships

, 2001
A 126-page brochure that describes the Office of Industrial Technologies' (OIT) Industries of the Future (IOF) Strategy. Through the IOF initiatives, OIT partners with the nation's nine most energy intensive industries to improve their energy and cost ...
United States. Department of Energy. Office of Energy Efficiency and Renewable Energy. Office of Industrial Technologies.
core  

Scenarios for a Clean Energy Future: Interlaboratory Working Group on Energy-Efficient and Clean-Energy Technologies

, 2000
This study estimates the potential for public policies and R and D programs to foster clean energy technology solutions to the energy and environmental challenges facing the nation.
The Interlaboratory Working Group on Energy-Efficient and Clean-Energy Technologies
core   +1 more source

Ideal Graph of a Graph [PDF]

, 2011
In this paper, we introduce ideal graph of a graph and study some of its properties. We characterize connectedness, isomorphism of graphs and coloring property of a graph using ideal graph.
Manoharan, R., Vasuki, R.
core   +1 more source

Seidel Switching and Graph Energy [PDF]

SSRN Electronic Journal, 2012
The energy of a graph Γ is the sum of the absolute values of the eigenvalues of the adjacency matrix of Γ. Seidel switching is an operation on the edge set of Γ. In some special cases Seidel switching does not change the spectrum, and therefore the energy. Here we investigate when Seidel switching changes the spectrum, but not the energy. We present an
openaire   +5 more sources

Choice number and energy of graphs

Linear Algebra and its Applications, 2008
to appear in Linear Algebra and its ...
Akbari, Saieed, Ghorbani, Ebrahim
openaire   +3 more sources

Design of Control Structure for Integrated Process Networks Based on Graph-theoretic Analysis

Chemical Engineering Transactions, 2017
A novel graph representation is developed to address the control structure selection of the process networks featuring multiple scale material and energy dynamics, which is a combination of the process flow graph and energy flow graph so that both the ...
L. Kang, Y. Liu
doaj   +1 more source