Results 11 to 20 of about 6,456,618 (282)

Vibrational resonance. [PDF]

open access: yes, 2000
The effect of a high-frequency force on the response of a bistable system to a low-frequency signal is considered for both the overdamped and weakly damped cases.
Landa, P. S., McClintock, Peter V. E.
core   +5 more sources

Thermal vibrational convection in near-critical fluids. Part 1. Non-uniform heating [PDF]

open access: yes, 2006
A theoretical model describing the response of a single-phase near-critical fluid to small-amplitude, high-frequency translational vibrations is developed on the basis of the multiple-scale and averaging methods.
Vorobev, Anatoliy   +9 more
core   +1 more source

Ultrafast energy flow in the wake of solution phase bimolecular reactions [PDF]

open access: yes, 2011
Vibrational energy flow into reactants, and out of products, plays a key role in chemical reactivity, so understanding the microscopic detail of the pathways and rates associated with this phenomenon is of considerable interest.
Orr-Ewing, AJ   +14 more
core   +1 more source

Thermal vibrational convection in near-critical fluids. Part 2. Weakly non-uniform heating [PDF]

open access: yes, 2006
The governing equations and effective boundary conditions to describe thermal vibrational convection in a near-critical fluid are derived with the help of the multiple-scale method and averaging procedure. In contrast to Part 1, this paper focuses on the
Vorobev, Anatoliy   +9 more
core   +1 more source

Detection of hollow heart disorder in watermelons using vibrational test and machine learning

open access: yesJournal of Agriculture and Food Research, 2023
The presence of internal voids in watermelons has an impact on the costs of producers and on consumer confidence. Various studies have shown that the vibrational parameters of the fruit are related to maturity, quality and the existence of internal ...
F.J. Simón-Portillo   +4 more
doaj   +1 more source

Nonlinear Elastic Wave Energy Imaging for the Detection and Localization of In-Sight and Out-of-Sight Defects in Composites

open access: yesApplied Sciences, 2020
In this study, both linear and nonlinear vibrational defect imaging is performed for a cross-ply carbon fiber-reinforced polymer (CFRP) plate with artificial delaminations and for a quasi-isotropic CFRP with delaminations at the edge.
Joost Segers   +4 more
doaj   +1 more source

Proceedings of the Thirteenth International Conference on Time-Resolved Vibrational Spectroscopy [PDF]

open access: yes, 2007
The thirteenth meeting in a long-standing series of “Time-Resolved Vibrational Spectroscopy” (TRVS) conferences was held May 19th to 25th at the Kardinal Döpfner Haus in Freising, Germany, organized by the two Munich Universities - Ludwig-Maximilians ...
Laubereau, Alfred
core   +1 more source

Computational Vibrational Spectroscopy

open access: yesCHIMIA, 2022
Vibrational spectroscopy is a powerful technique to characterize the near-equilibrium dynamics of molecules in the gas and the condensed phase. This contribution summarizes efforts from computer-based methods to gain insight into the relationship ...
Markus Meuwly
doaj   +1 more source

Damage detection based on output-only measurements using cepstrum analysis and a baseline-free frequency response function curvature method

open access: yesScience Progress, 2022
Low-severity multiple damage detection relies on sensing minute deviations in the vibrational or dynamical characteristics of the structure. The problem becomes complicated when the reference vibrational profile of the healthy structure and corresponding
Ayisha Nayyar   +4 more
doaj   +1 more source

Vibrational Resonance and Electrical Activity Behavior of a Fractional-Order FitzHugh–Nagumo Neuron System

open access: yesMathematics, 2021
Making use of the numerical simulation method, the phenomenon of vibrational resonance and electrical activity behavior of a fractional-order FitzHugh–Nagumo neuron system excited by two-frequency periodic signals are investigated.
Jia-Wei Mao, Dong-Liang Hu
doaj   +1 more source

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