Zobrazeno 1 - 10
of 3 861
pro vyhledávání: '"Z. Q. Zhang"'
Publikováno v:
Physical Review X, Vol 13, Iss 2, p 021024 (2023)
In PT-symmetric systems, the notion of non-Abelian frame charges enables multiband topological characterization of degeneracies by examining the eigenvector-frame rotations. Interestingly, some features of these frame charges can be viewed as an anal
Externí odkaz:
https://doaj.org/article/9804c439ce3c4bada04406735af6d97e
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019)
Exceptional points in non-Hermitian systems can enhance the performance of optical sensors. Here, Wang et al. demonstrate theoretically and experimentally that higher-order exceptional points, which would allow for yet higher sensitivities, can be re
Externí odkaz:
https://doaj.org/article/22d5ba395f6e40a99b3fdb7df302852f
Publikováno v:
AIP Advances, Vol 10, Iss 9, Pp 095316-095316-12 (2020)
Nonlinear energy storage and dissipation of rocks are common in earthquake, tunnel, and mining engineering. To investigate the nonlinear energy characteristics of rocks, multi-level cyclic loading–unloading triaxial compression (CLTC) tests were pe
Externí odkaz:
https://doaj.org/article/26b8b3755bc54beaaee350c7744d14ad
Publikováno v:
The European Zoological Journal, Vol 84, Iss 1, Pp 186-192 (2017)
Song plays a vital role in communication in songbirds, primarily for territorial defense and mate attraction. Larger animals, having larger vocal organs, produce low sound frequencies more efficiently. Accordingly, the frequency of vocalizations is o
Externí odkaz:
https://doaj.org/article/a6b958e8fd71481894c1216ca9d6d8b5
Publikováno v:
Research, Vol 2019 (2019)
We review some recent progress in the exploration of pseudospin-1 physics using dielectric photonic crystals (PCs). We show some physical implications of the PCs exhibiting an accidental degeneracy induced conical dispersion at the Γ point, such as
Externí odkaz:
https://doaj.org/article/b5abdf9ecb7641b6b5087dc7801ba318
Publikováno v:
Brazilian Journal of Medical and Biological Research, Vol 48, Iss 12, Pp 1145-1150 (2015)
This study investigated the value of computed tomography (CT) in the diagnosis and treatment of hepatic veno-occlusive disease (HVOD) caused by Sedum aizoon (SA). The clinical manifestations, treatment results, imaging findings, and histological find
Externí odkaz:
https://doaj.org/article/7eae0a088d7c42eb8330d52c1d9dda47
Autor:
S. H. Wang, D. F. Li, K. K. Song, H. G. Sun, S. Wu, D. L. Yan, Q. S. Xue, Z. Q. Zhang, B. Song, C. X. Peng, X. L. Li, L. Wang
Publikováno v:
AIP Advances, Vol 8, Iss 10, Pp 105119-105119-11 (2018)
Glass-forming ability (GFA) is crucial for designing bulk metallic glasses. In this work, it was found that when the content of the solvent element with an atomic radius larger than 1.58 Å in one ternary alloy system is fixed, their entropy of mixin
Externí odkaz:
https://doaj.org/article/007e115426e14c569b6aca37924034de
Autor:
Z. Q. Zhang, J. L. Yang
Publikováno v:
Applied Bionics and Biomechanics, Vol 2015 (2015)
Background. Cranial sutures are deformable joints between the bones of the skull, bridged by collagen fibres. They function to hold the bones of the skull together while allowing for mechanical stress transmission and deformation. Objective. The aim
Externí odkaz:
https://doaj.org/article/47f2280dc63e4dfc8167650f4f416068
Publikováno v:
Physical Review X, Vol 6, Iss 2, p 021007 (2016)
Non-Hermitian systems distinguish themselves from Hermitian systems by exhibiting a phase transition point called an exceptional point (EP), at which two eigenstates coalesce under a system parameter variation. Many interesting EP phenomena, such as
Externí odkaz:
https://doaj.org/article/a430d79065904cc39be168611f0157a4
Publikováno v:
Physical Review X, Vol 4, Iss 2, p 021017 (2014)
Surface impedance is an important concept in classical wave systems such as photonic crystals (PCs). For example, the condition of an interface state formation in the interfacial region of two different one-dimensional PCs is simplyZ_{SL}+Z_{SR}=0, w
Externí odkaz:
https://doaj.org/article/7b365731a6a54272a426961443de9c25