Results 21 to 30 of about 6,985,617 (243)

Bounds for Incidence Energy of Some Graphs

open access: yesJournal of Applied Mathematics, 2013
Let G be a simple graph. The incidence energy (IE for short) of G is defined as the sum of the singular values of the incidence matrix. In this paper, a new upper bound for IE of graphs in terms of the maximum degree is given. Meanwhile, bounds for IE of
Weizhong Wang, Dong Yang
doaj   +1 more source

On the Incidence Energy of Some Toroidal Lattices

open access: yesAbstract and Applied Analysis, 2014
The incidence energy IE(G), defined as the sum of the singular values of the incidence matrix of G, is a much studied quantity with well known applications in chemical physics.
Jia-Bao Liu, Jinde Cao, Jin Xie
doaj   +1 more source

Randi'c incidence energy of graphs [PDF]

open access: yesTransactions on Combinatorics, 2014
Let $G$ be a simple graph with vertex set $V(G) = {v_1, v_2,ldots , v_n}$ and edge set $E(G) = {e_1, e_2,ldots , e_m}$. Similar to the Randi'c matrix, here we introduce the Randi'c incidence matrix of a graph $G$, denoted by $I_R(G)$, which is defined
Ran Gu, Fei Huang, Xueliang Li
doaj  

Note on the Sum of Powers of Normalized Signless Laplacian Eigenvalues of Graphs [PDF]

open access: yesMathematics Interdisciplinary Research, 2019
In this paper, for a connected graph G and a real α≠0, we define a new graph invariant σα(G)-as the sum of the alphath powers of the normalized signless Laplacian eigenvalues of G.
Ş. Burcu Bozkurt Altındağ
doaj   +1 more source

Utility disconnection protections and the incidence of energy insecurity in the United States

open access: yesiScience, 2023
Summary: Energy insecurity—the inability to secure one’s energy needs—impacts millions of Americans each year. A particularly severe instance of energy insecurity is when a utility disconnects a household from service, affecting its ability to ...
Trevor Memmott   +3 more
doaj   +1 more source

The incidence of smart windows in building energy saving and future climate projections

open access: yesEnergy Reports, 2022
The ongoing climate crisis leads to develop smart communities with zero net emissions, and the Responsive Building Envelopes (RBEs) have a crucial role for the goal to be achieved. In this frame the smart windows are promising building envelope solution.
Rosa Francesca De Masi   +4 more
doaj   +1 more source

A Blueprint for Ocean Energy Development 2010-2015 [PDF]

open access: yes
In an effort to foster a collaborative approach to advancing the ocean energy industry, OWET convened the OWET 2010 Developersʼ Summit on September 27 and 28, 2010 in Portland, Oregon.
Oregon Wave Energy Trust
core   +6 more sources

Energy dependence of He-ion-induced tungsten nanofuzz formation at non-normal incidence angles

open access: yesNuclear Materials and Energy, 2017
We report measurements of He-ion-beam induced tungsten nanofuzz formation for normal and non-normal incidence angles in the energy range 218eV–10keV. At 218eV, the fuzz tendrils are fine and grow randomly away from the interface in the direction of the ...
F.W. Meyer   +6 more
doaj   +1 more source

Glass surfaces incidence on the energy efficiency of homes: two cases in Tucumán

open access: yesARQUISUR Revista, 2023
The objective of this work is to demonstrate how the glace surface considerably affects building energy efficiency. Two cases of housing are presented, which consist of two private neighborhood houses located in the metropolitan area of San Miguel de ...
Amalita Fernández   +1 more
doaj   +1 more source

Recommendations concerning energy information model documentation, public access, and evaluation [PDF]

open access: yes, 1979
In this study we provide an analysis of the factors underlying Congressional concern regarding model documentation, policies for public access, and evaluation procedures of the Energy Information Administration (EIA) and its predecessor agencies; we also
Wood, D.O.   +3 more
core   +1 more source

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