Zobrazeno 1 - 10
of 4 528
pro vyhledávání: '"An Guangzhou"'
This study investigates scalar clouds around Kerr-Newman black holes within the Einstein-Maxwell-scalar model. Tachyonic instabilities are identified as the driving mechanism for scalar cloud formation. Employing the spectral method, we numerically c
Externí odkaz:
http://arxiv.org/abs/2408.09243
Recently, ultracompact objects have been found to be susceptible to a new nonlinear instability, known as the light-ring instability, triggered by stable light rings. This discovery raises concerns about the viability of these objects as alternatives
Externí odkaz:
http://arxiv.org/abs/2403.02089
Orthogonal array and a large set of orthogonal arrays are important research objects in combinatorial design theory, and they are widely applied to statistics, computer science, coding theory and cryptography. In this paper, some new series of large
Externí odkaz:
http://arxiv.org/abs/2312.12234
Publikováno v:
J. Combin. Des. (2024), 32, 556-576
For positive integers $m$ and $n$, the Zarankiewicz number $Z_{2,2}(m,n)$ can be defined as the maximum total degree of a linear hypergraph with $m$ vertices and $n$ edges. Guy determined $Z_{2,2}(m,n)$ for all $n \geq \binom{m}{2}/3+O(m)$. Here, we
Externí odkaz:
http://arxiv.org/abs/2310.12685
In this paper, we construct scalarized rotating black holes within the framework of Einstein-Maxwell-scalar models. These models incorporate non-minimal couplings that can induce tachyonic instabilities, leading to the spontaneous scalarization of Ke
Externí odkaz:
http://arxiv.org/abs/2307.12210
Autor:
Feng, Ziwei, Shi, Tan, Geng, Guangzhou, Li, Junjie, Deng, Zi-Lan, Kivshar, Yuri, Li, Xiangping
Lanthanide-doped upconversion nanoparticles emerged recently as an attractive material platform underpinning a broad range of innovative applications such as optical cryptography, luminescent probes, and lasing. However, the intricate 4f-associated e
Externí odkaz:
http://arxiv.org/abs/2305.09113
We study time evolutions of charged scalar perturbations on the background of a charged hairy black hole, in which the perturbations can be governed by a double-peak effective potential. By extracting quasinormal modes from the waveform of scalar per
Externí odkaz:
http://arxiv.org/abs/2301.06483
Autor:
Li Guangzhou, Ratthai Porncharoen
Publikováno v:
Journal of Graphic Engineering and Design, Vol 15, Iss 2, Pp 39-49 (2024)
Mortice-tenons are the main structural forms of ancient buildings, furniture, and woodwork in China. They are the inheritance of China's craft and cultural spirit, follow the principles of mechanics and have strong practicability. How-ever, mortice-t
Externí odkaz:
https://doaj.org/article/31ee8701bca7422bb7568e690f5d75be
Autor:
Xingying Zhou, Shusong Zan, Yifei Zeng, Ruiyang Guo, Guangzhou Wang, Tingzhang Wang, Linjie Zhao, Mingjun Chen
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 9221-9236 (2024)
Graded polycrystalline copper materials have been expected in the field of scientific research and engineering in recent years because the core of the material has enough toughness and a sufficient surface strength. However, the plastic deformation m
Externí odkaz:
https://doaj.org/article/b9f0195a33b04b4ab3651d149d5f0a51
Publikováno v:
ACS Omega, Vol 9, Iss 19, Pp 20637-20647 (2024)
Externí odkaz:
https://doaj.org/article/b5eaf96a59c24a78912a3e18867f1081