Results 21 to 30 of about 5,552,824 (295)
An approach to nonlinear viscoelasticity via metric gradient flows [PDF]
, 2013 We formulate quasistatic nonlinear finite-strain viscoelasticity of rate type as a gradient system. Our focus is on nonlinear dissipation functionals and distances that are related to metrics on weak diffeomorphisms and that ensure time-dependent frame ...
Mielke, A. +4 more
core +1 more source
A study of gas lift on oil/water flow in vertical risers [PDF]
, 2014 Gas lift is a means of enhancing oil recovery from hydrocarbon reservoirs. Gas injected at the production riser base reduces the gravity component of the pressure drop and thereby, increases the supply of oil from the reservoir. Also, gas injection at
Brini Ahmed, Salem Kalifa
core +3 more sources
Phase synchronization analysis by assessment of the phase difference gradient
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2009 Phase synchronization is an important phenomenon of nonlinear dynamics and has recently received much scientific attention. In this work a method for identifying phase synchronization epochs is described which focuses on estimating the gradient of segments of the generalized phase differences between phase slips in an experimental time series. In phase
Vejmelka, M. (Martin) +2 more
openaire +3 more sources
Optical Forces Arising from Phase Gradients [PDF]
Physical Review Letters, 2008 We demonstrate both theoretically and experimentally that gradients in the phase of a light field exert forces on illuminated objects, including forces transverse to the direction of propagation. This effect generalizes the notion of the photon orbital angular momentum carried by helical beams of light.
Roichman, Yohai +4 more
openaire +3 more sources
Achieving Directive Radiation and Broadband Microwave Absorption by an Anisotropic Metasurface
IEEE Access, 2019 Simultaneously integrating electromagnetic absorption and wavefront-shaping into a single metasurface with flat and low profile is crucial for many practical applications both in science and engineering community. Here, by introducing lossy components to
Jun Sun +6 more
doaj +1 more source
Optical Force Control Using Phase-Gradient Metasurfaces [PDF]
, 2018 We propose to control the motion of nanoparticles using phase-gradient metasurfaces. The latter are used to generate surface waves, which put the particles into motion, when illuminated by a normally incident plane wave.
Martin, O. J. F. +5 more
core +2 more sources
Gradient higher integrability for degenerate parabolic double-phase systems [PDF]
, 2023 We prove local higher integrability of the gradient of a weak solution to a degenerate parabolic double-phase system. This result comes with a reverse H\"older type estimate for the gradient.
Kinnunen, Juha +2 more
core +2 more sources
Remote Sensing, 2014 Interferometric Synthetic Aperture Radar (InSAR) and Differential Interferometric Synthetic Aperture Radar (DInSAR) have shown numerous applications for subsidence monitoring.
Donglie Liu +6 more
doaj +1 more source
Remote Sensing, 2022 Phase unwrapping (PU) is a key program in data processing in the interferometric synthetic aperture radar (InSAR) technique, and its accuracy directly affects the quality of final SAR data products.
Yansuo Zhang +5 more
doaj +1 more source
Multi-Beam Metasurface Antenna by Combining Phase Gradients and Coding Sequences
IEEE Access, 2019 In this paper, we propose a strategy to achieve a single-feed multi-beam metasurface antenna by combining phase gradient and coding sequence. Theoretically, the multi-beam antennas with various far-field patterns can be realized via superimposing ...
He Wang +10 more
doaj +1 more source