Results 91 to 100 of about 66,958 (298)
Uma contribuição ao controle de sistemas comutados [PDF]
, 2012 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-graduação em Engenharia de Automação e Sistemas, Florianópolis, 2009Esta tese apresenta diversos aspectos relacionados com a modelagem, analise e controle de ...
García, Martín Jorge Pomar
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Spectral characterizations of graphs with small spectral radius
, 2012 A graph is said to have a small spectral radius if it does not exceed the corresponding Hoffmann limit value. In the case of (signless) Laplacian matrix, the Hoffmann limit value is equal to ε+2=4.38+, with ε being the real root of x3-4x-4.
BELARDO, Francesco +2 more
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Advanced Engineering Materials, EarlyView.Si‐doped AlCoCrFeNi high‐entropy alloys are synthesized by mechanical alloying to reveal the effect of Si content and milling time on phase evolution, microstructural refinement, and tribological behavior. A transition from FCC to BCC structure, significant grain refinement, and enhanced hardness and wear resistance are achieved, with the 4 at% Si ...
Mustafa Okumuş +2 more
wiley +1 more source
Why the Spectral Radius? An intuition-building introduction to the basic reproduction number. [PDF]
Bull Math Biol, 2022 Brouwer AF.
europepmc +1 more source
On the Laplacian spectral radius of a tree
Linear Algebra and its Applications, 2003 The Laplacian matrix of a graph is the difference of the diagonal matrix of its vertex degrees and its adjacency matrix. The Laplacian spectral radius of a graph is the largest eigenvalue of its Laplacian matrix. This paper gives upper bounds on the Laplacian spectral radius of trees, in terms of the size of a maximum matching in it, and the number of ...
openaire +2 more sources
Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions
Advanced Functional Materials, EarlyView.DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng +7 more
wiley +1 more source
The skew spectral radius and skew Randić spectral radius of general random oriented graphs [PDF]
Let G be a simple connected graph on n vertices, and let Gσ be an orientation of G with skew adjacency matrix S(Gσ). Let di be the degree of the vertex vi in G. The skew Randić matrix of Gσ is the n×n real skew symmetric matrix RS(Gσ)=[(RS)ij], where (RS)
Broersma, Hajo; id_orcid +3 more
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On the maximum spectral radius of multipartite graphs
AKCE International Journal of Graphs and Combinatorics, 2020 Let be an integer. A graph is called r – partite if V admits a partition into r parts such that every edge has its ends in different parts. All of the r – partite graphs with given integer r consist of the class of multipartite graphs.
Jian Wu, Haixia Zhao
doaj +1 more source
Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids
Advanced Functional Materials, EarlyView.This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow +9 more
wiley +1 more source
Inequalities for the Norm and Numerical Radius of Composite Operators in Hilbert Spaces
, 2005 Some new inequalities for the norm and the numerical radius of composite operators generated by a pair of operators are ...
Dragomir, Sever S
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