Results 61 to 70 of about 233,669 (326)

Hands‐on protocol for preparing water‐soluble fractions from agri‐food samples for NMR‐based metabolomics analysis

open access: yesFEBS Open Bio, EarlyView.
This research protocol outlines a workflow for nuclear magnetic resonance (NMR)‐based metabolomics in the agri‐food sector. Using two case studies—strawberry leaves (solid matrix) and wine (liquid matrix)—it details the procedures for sample preparation, data acquisition, and processing.
Andrea Fernández‐Veloso   +4 more
wiley   +1 more source

Shock Waves in Liquid under the Pulsed Action of a Cavitation Bubble on a Rigid Wall [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2015
Shock waves arising in water during the collapse of a cavitation bubble near a plane rigid wall are studied in the case with a liquid layer (interlayer) between the bubble and the wall. The shock waves determine to a large extent the pulsed action of the
A.A. Aganin   +3 more
doaj  

A Numerical Simulation of the Underwater Supersonic Gas Jet Evolution and Its Induced Noise

open access: yesApplied Sciences, 2023
To explore the complex flow field and noise characteristics of underwater high-speed gas jets, the mixture multiphase model, large eddy simulation method, and Ffowcs Williams–Hawking (FW–H) acoustic model were used for simulations, and the numerical ...
Wei Yu, Baoshou Wang, Chun Zhang
doaj   +1 more source

The Noise Generated by the Collapse of a Cloud of Cavitation Bubbles [PDF]

open access: yes, 1995
The focus of this paper is the numerical simulation of the dynamics and acoustics of a cloud of cavitating bubbles. The prototypical problem solved considers a finite cloud of nuclei that is exposed to a decrease in the ambient pressure which causes the
Brennen, C. E., Wang, Y.-C.
core  

Stability of multi-electron bubbles in liquid helium

open access: yes, 2008
The stability of multi-electron bubbles in liquid helium is investigated theoretically. We find that multi-electron bubbles are unstable against fission whenever the pressure is positive.
A. P. Volodin   +10 more
core   +1 more source

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Sagging damage characteristics of hull girder with trapezoidal cross-section subjected to near-field underwater explosion

open access: yesDefence Technology, 2023
To investigate the overall damage characteristics and failure modes of a warship subjected to an underwater non-contact near-field explosion, a hull girder with a trapezoidal cross-section was designed, manufactured, and tested.
Hai-tao Li   +5 more
doaj   +1 more source

Microdroplet impact at very high velocity [PDF]

open access: yes, 2012
Water microdroplet impact at velocities up to 100 m/s for droplet diameters from 12 to 100 um is studied. This parameter range covers the transition from capillary-limited to viscosity-limited spreading of the impacting droplet.
Lohse, Detlef   +3 more
core   +2 more sources

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

open access: yesAdvanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe   +8 more
wiley   +1 more source

Similarity solution of the shock wave propagation in water [PDF]

open access: yesApplied and Computational Mechanics, 2007
This paper presents the possibility of calculation of propagation of a shock wave generated during the bubble collapse in water including the dissipation effect.
Muller M.
doaj  

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