Results 81 to 90 of about 131,913 (332)
Investigation of nonlinear squeeze-film damping involving rarefied gas effect in micro-electro-mechanical-systems [PDF]
arXiv, 2022 In this paper, the nonlinear squeeze-film damping (SFD) involving rarefied gas effect in the micro-electro-mechanical-systems (MEMS) is investigated. Considering the motion of structures (beam, cantilever, and membrane) in MEMS, the dynamic response of structure will be influenced largely by the squeeze-film damping. In the traditional model, a viscous
arxiv
The Rise of Refractory Transition‐Metal Nitride Films for Advanced Electronics and Plasmonics
Advanced Materials Interfaces, EarlyView.Transition‐metal nitrides (TMNs) are exceptional materials with high stability, biocompatibility, and semiconductor integration, which have been extensively employed in various fields. However, the epitaxial growth of TMN films remains a challenge. The absence of high‐quality TMNs limits the understanding of their condensed matter physics and hinders ...
Jiachang Bi +3 more
wiley +1 more source
Global existence and decay estimates for a viscoelastic plate equation with nonlinear damping and logarithmic nonlinearity [PDF]
arXiv, 2022 In this article, we consider a viscoelastic plate equation with a logarithmic nonlinearity in the presence of nonlinear frictional damping term. Using the the Faedo-Galerkin method we establish the global existence of the solution of the problem and we also prove few general decay rate results.
arxiv
Advanced Materials Technologies, EarlyView.A variable stiffness structure with shape morphing and shape memory capabilities made from layered textiles and 3D printing material is developed. Direct printing of cPLA on textile electrodes maximizes the electrodes' contact area. This work presents a new method for achieving variable stiffness in small segments of soft, deformable structures, using ...
Johannes Frey +2 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.Utilizing a novel (Ni81Fe19/Ti)4/Cu/(Ni81Fe19/Ti)4 thin‐film multilayer with low coercive field, low damping and a superior GMI ratio, a compact, low‐noise unbiased FMR‐driven integrated GMI sensor with a superior magnetic noise performance of ≈100 pT/√Hz is first demonstrated, owing to reduced phase noise from well‐defined aligned magnetic domains and
Bin Luo +8 more
wiley +1 more source
Two types of spurious damping forces potentially modeled in numerical seismic nonlinear response history analysis [PDF]
16th World Congress on Earthquake Engineering (16WCEE), Jan 2017,
Santiago, Chile. Proceedings of the 16th World Congress on Earthquake
Engineering, Paper \#3187, 2017 The purpose of this paper is to provide practitioners with further insight into spurious damping forces that can be generated in nonlinear seismic response history analyses (RHA). The term 'spurious' is used to refer to damping forces that are not present in an elastic system and appear as nonlinearities develop: such damping forces are not necessarily
arxiv
Frequency‐Selective Terahertz Wave Amplification by a Time Boundary in Huygens' Metasurface
Advanced Optical Materials, EarlyView.In a free‐standing all‐dielectric Huygens' metasurface, ultrafast pulsed laser excitation is used to establish the time boundary for a coherent modulation to the electric and magnetic polarizability in the adiabatic limit. Amplification of THz waves at frequencies that can be continuously tuned have been achieved, showing an effective energy gain up to
Fu Deng +9 more
wiley +1 more source
Application of Hilbert instantaneous spectrum on improved bolt anchoring quality detection
Engineering Reports, Volume 4, Issue 12, December 2022., 2022 A method utilizing a way to compute the instantaneous frequency curve of the bolt signal is proposed to overcome the phase folding problem existing in the Hilbert transform spectrum. The instantaneous frequency curve of the signal can help accurately identify the reflected signal from the bolt bottom and the position of the defect, thus accurately ...
Chen Li, Guozhong Gao, Yunsheng Wang
wiley +1 more source
Advanced Optical Materials, EarlyView.Light impinging from the left on a metasurface composed by active material. The metasurface shows asymmetric configuration through the non‐uniform presence of holes. The forming quasi‐BICs modes are exploited for lasing purposes. Abstract It is proposed and numerically demonstrated a novel strategy to achieve lasing generation from a dual‐band symmetry‐
Tao Wang +3 more
wiley +1 more source