Results 51 to 60 of about 77,548 (281)
Finite frequency current noise in the Holstein model
, 2017 We investigate the effects of local vibrational excitations in the nonsymmetrized current noise $S(\omega)$ of a nanojunction. For this purpose, we analyze a simple model - the Holstein model - in which the junction is described by a single electronic ...
Belzig, Wolfgang +2 more
core +1 more source
Multistability and localization in forced cyclic symmetric structures modelled by weakly-coupled Duffing oscillators [PDF]
, 2018 Many engineering structures are composed of weakly coupled sectors assembled in a cyclic and ideally symmetric configuration, which can be simplified as forced Duffing oscillators.
Ciavarella, M. +4 more
core +6 more sources
Advanced Functional Materials, EarlyView.Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr +7 more
wiley +1 more source
Self-Excited Vibration Analysis for the Feed Support System in FAST
International Journal of Advanced Robotic Systems, 2014 China is currently building the largest single dish radio telescope in the world, which is called the Five-hundred meter Aperture Spherical radio Telescope (FAST). The feed support system in the FAST is composed of a cable-driven parallel manipulator, an
Xiaoqiang Tang +3 more
doaj +1 more source
Xibei Gongye Daxue Xuebao, 2019 Exploration of oil or gas wells is usually carried out by using drilling system. When the kilometers of drilling system is externally disturbed, the drilling system is prone to undesired stick-slip vibration of the drill-string.
doaj +1 more source
Study on the Different Effects of Power and Trailer Wheelsets on Wheel Polygonal Wear
Shock and Vibration, 2020 The wheels of power and trailer wheelset show different polygonal characteristics since their structures are obviously different. Therefore, the frictional self-excited vibration models of wheelset-track systems are established based on the viewpoint of ...
X. N. Zhao +3 more
doaj +1 more source
Actuating mechanism and design of a cylindrical traveling wave ultrasonic motor using cantilever type composite transducer. [PDF]
PLoS ONE, 2010 BACKGROUND: Ultrasonic motors (USM) are based on the concept of driving the rotor by a mechanical vibration excited on the stator via piezoelectric effect.
Yingxiang Liu +3 more
doaj +1 more source
Structure of Stationary Photodissociation Fronts [PDF]
, 1996 The structure of stationary photodissociation fronts is revisited. H_2 self- shielding is discussed, including the effects of line overlap. We find that line overlap is important for N(H_2) > 10^{20} cm^{-2}.
Bertoldi, Frank, Draine, B. T.
core +3 more sources
Photoswitching Conduction in Framework Materials
Advanced Functional Materials, EarlyView.This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez +4 more
wiley +1 more source
Femtosecond study of the effects of ions on the reorientation dynamics of water
, 2012 We study the effects of ions on the reorientation dynamics of liquid water with polarization-resolved femtosecond mid-infared spectroscopy. We probe the anisotropy of the excitation of the O-D stretch vibration of HDO molecules in solutions of NaCl, NaI ...
Bakker, Huib J. +2 more
core +1 more source