Results 51 to 60 of about 302,487 (287)

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan   +4 more
wiley   +1 more source

Control of Recoil Losses in Nanomechanical SiN Membrane Resonators [PDF]

open access: yes, 2016
In the context of a recoil damping analysis, we have designed and produced a membrane resonator equipped with a specific on-chip structure working as a "loss shield" for a circular membrane.
Bonaldi, M.   +10 more
core   +2 more sources

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti   +11 more
wiley   +1 more source

A Rortex-based method for evaluating hydraulic losses in pump-turbines: a case study of turbine mode under different load conditions

open access: yesEngineering Applications of Computational Fluid Mechanics
When pump-turbines operate under off-design conditions, complex internal vortex flows often arise, leading to hydraulic instabilities and increased energy losses. Traditional hydraulic loss evaluation methods fail to quantitatively link vortex structures
Lianchen Xu   +7 more
doaj   +1 more source

Electrodynamics of Josephson vortex lattice in high-temperature superconductors

open access: yes, 2007
We studied response of the Josephson vortex lattice in layered superconductors to the high-frequency c-axis electric field. We found a simple relation connecting the dynamic dielectric constant with the perturbation of the superconducting phase, induced ...
A. E. Koshelev   +2 more
core   +1 more source

Superconducting cosmic strings — Energy loss by plasma dissipation

open access: yesPhysics Letters B, 1987
Abstract We analyse the interactions of superconducting cosmic strings (SCS) with the plasma in the early Universe from the point of view of the cosmological scenario proposed by Ostriker, Thompson and Witten. The plasma dissipation is an efficient energy loss mechanism of a loop, especially in the early stages of its evolution and at the cusps.
Mirosław Panek, Bronisław Rudak
openaire   +1 more source

Dissipative Binding of Lattice Bosons through Distance-Selective Pair Loss [PDF]

open access: yesPhysical Review Letters, 2012
We show that in a gas of ultra cold atoms distance selective two-body loss can be engineered via the resonant laser excitation of atom pairs to interacting electronic states. In an optical lattice this leads to a dissipative Master equation dynamics with Lindblad jump operators that annihilate atom pairs with a specific interparticle distance.
Ates, C.   +3 more
openaire   +3 more sources

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

open access: yesAdvanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek   +5 more
wiley   +1 more source

ENERGY DISSIPATION CHARACTERISTICS OF NON-LINEAR NORMAL VIBRATION CONTACT INTERFACE

open access: yesJixie qiangdu, 2022
The energy dissipation characteristics of the non-linear normal vibration contact system of the interface have important theoretical and engineering significance for describing the dynamic mechanism of the interface.Based on Hertz contact theory, the ...
ZHANG MingSong   +4 more
doaj  

System Reliability Assessment Based on Energy Dissipation: Modeling and Application in Electro-Hydrostatic Actuation System

open access: yesEnergies, 2019
This paper addresses a new reliability model, based on energy dissipation, considering performance degradation behaviors. Different from the two-state reliability model and traditional reliability model based on failure rate statistics, this paper ...
Xiaoyu Cui   +3 more
doaj   +1 more source

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