Zobrazeno 1 - 10
of 3 610
pro vyhledávání: '"A Meini"'
We investigate the problem of enforcing a desired centrality measure in complex networks, while still keeping the original pattern of the network. Specifically, by representing the network as a graph with suitable nodes and weighted edges, we focus o
Externí odkaz:
http://arxiv.org/abs/2409.02524
Autor:
Bini, Dario, Meini, Beatrice
Let $A_\alpha$ be the semi-infinite tridiagonal matrix having subdiagonal and superdiagonal unit entries, $(A_\alpha)_{11}=\alpha$, where $\alpha\in\mathbb C$, and zero elsewhere. A basis $\{P_0,P_1,P_2,\ldots\}$ of the linear space $\mathcal P_\alph
Externí odkaz:
http://arxiv.org/abs/2405.03483
Given a stochastic matrix $P$ partitioned in four blocks $P_{ij}$, $i,j=1,2$, Kemeny's constant $\kappa(P)$ is expressed in terms of Kemeny's constants of the stochastic complements $P_1=P_{11}+P_{12}(I-P_{22})^{-1}P_{21}$, and $P_2=P_{22}+P_{21}(I-P
Externí odkaz:
http://arxiv.org/abs/2312.13201
Autor:
Durastante, Fabio, Meini, Beatrice
We propose two approaches, based on Riemannian optimization, for computing a stochastic approximation of the $p$th root of a stochastic matrix $A$. In the first approach, the approximation is found in the Riemannian manifold of positive stochastic ma
Externí odkaz:
http://arxiv.org/abs/2307.14040
Autor:
Gao, Ying, Ma, Xuekai, Zhai, Xiaokun, Xing, Chunzi, Gao, Meini, Dai, Haitao, Wu, Hao, Liu, Tong, Ren, Yuan, Wang, Xiao, Pan, Anlian, Hu, Wei, Schumacher, Stefan, Gao, Tingge
In planar microcavities, the transverse-electric and transverse-magnetic (TE-TM) mode splitting of cavity photons arises due to their different penetration into the Bragg mirrors and can result in optical spin-orbit coupling (SOC). In this work, we f
Externí odkaz:
http://arxiv.org/abs/2305.01368
By exploiting the connection between solving algebraic $\top$-Riccati equations and computing certain deflating subspaces of $\top$-palindromic matrix pencils, we obtain theoretical and computational results on both problems. Theoretically, we introd
Externí odkaz:
http://arxiv.org/abs/2302.10604
Autor:
Bini, Dario, Meini, Beatrice
A defect correction formula for quadratic matrix equations of the kind $A_1X^2+A_0X+A_{-1}=0$ is presented. This formula, expressed by means of an invariant subspace of a suitable pencil, allows us to introduce a modification of the Structure-preserv
Externí odkaz:
http://arxiv.org/abs/2212.09491
Autor:
Zhai, Xiaokun, Ma, Xuekai, Gao, Ying, Xing, Chunzi, Gao, Meini, Dai, Haitao, Wang, Xiao, Pan, Anlian, Schumacher, Stefan, Gao, Tingge
Publikováno v:
Phys. Rev. Lett. 131, 136901 (2023)
Manipulating bosonic condensates with electric fields is very challenging as the electric fields do not directly interact with the neutral particles of the condensate. Here we demonstrate a simple electric method to tune the vorticity of exciton pola
Externí odkaz:
http://arxiv.org/abs/2211.01680
Autor:
Raphael Ricardo Zepon Tarpani, Akilu Yunusa-Kaltungo, Meini Su, Patrick Manu, Clara Man Cheung, Michael Watson, Paul Ladislaus, Alejandro Gallego-Schmid
Publikováno v:
Cleaner Environmental Systems, Vol 14, Iss , Pp 100206- (2024)
Cement production significantly contributes to climate change, necessitating alternatives to mitigate the environmental impacts of this essential construction material. This study evaluates 18 environmental impacts of producing Ordinary Portland Ceme
Externí odkaz:
https://doaj.org/article/4936aed61bcf454ab9e810e374b0d32a
Publikováno v:
Open Medicine, Vol 19, Iss 1, Pp 136-44 (2024)
To explore the efficacy of ginkgo diterpene lactone (GDLM) on cognitive function in patients with acute ischemic stroke (AIS).
Externí odkaz:
https://doaj.org/article/a81e8351635d404897f730c6b07d7476