Results 21 to 30 of about 4,607,794 (314)

Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion

open access: yesCailiao gongcheng, 2016
Based on the discussion of the factors influencing the nonlinear ultrasonic testing, the feasibility of nondestructive evaluation of HR3C fireside corrosion was investigated using nonlinear ultrasonic testing.
QIN Peng   +4 more
doaj   +1 more source

Design of nonlinear photonic crystal fibers with ultra‐flattened zero dispersion for supercontinuum generation

open access: yesETRI Journal, 2020
The study reports on the design and performance of two air‐filled and two partial ethanol‐filled photonic crystal fiber (PCF) structures with a tetra core for supercontinuum generation. The PCFs are nonlinear with ultra‐flattened zero dispersion.
Pranaw Kumar   +2 more
doaj   +1 more source

Fatigue damage quantitative evaluation of carbon fiber composites at different stress ratios based on nonlinear ultrasonic

open access: yesResults in Physics, 2023
In order to investigate the fatigue behavior of carbon fiber composites and the influence of different stress levels on their fatigue damage characteristics, the fatigue experiments of carbon fiber composites under different stress ratios are carried out.
Silong Quan, Yuhua Zhang, Peishan Lin
doaj   +1 more source

Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient

open access: yesOptics Express, 2010
We report a novel photoacoustic Z-scan (PAZ-scan) technique that combines the advantages offered by the conventional Z-scan method and the sensitivity of the photoacoustic detection. The sample is scanned through the focused laser beam and the generated photoacoustic signal is recorded using a 10 MHz focused ultrasound transducer.
Yelleswarapu, Chandra S   +1 more
openaire   +2 more sources

Solitary wave solutions for the variable-coefficient coupled nonlinear Schrödinger equations and Davey–Stewartson system using modified sine-Gordon equation method

open access: yes, 2020
In this study, the sine-Gordon equation method is modified to deal with variable-coefficient systems containing imaginary parts, such as nonlinear Schrodinger systems.
Rehab M. El-Shiekh, Mahmoud Gaballah
semanticscholar   +1 more source

Breather transition dynamics, Peregrine combs and walls, and modulation instability in a variable-coefficient nonlinear Schrödinger equation with higher-order effects. [PDF]

open access: yesPhysical Review E, 2016
We study a variable-coefficient nonlinear Schrödinger (vc-NLS) equation with higher-order effects. We show that the breather solution can be converted into four types of nonlinear waves on constant backgrounds including the multipeak solitons, antidark ...
Lei Wang   +4 more
semanticscholar   +1 more source

The Nonlinear Effective Attenuation Coefficient of Spaceborne Oceanic Lidar Signal [PDF]

open access: yesEPJ Web of Conferences, 2020
Multiple scattering is an inevitable effect in spaceborne oceanic lidar because of the large footprint size and the high optical density of seawater. The effective attenuation coefficient klidar in oceanic lidar equation, which indicates the influence of
Liu Qun   +7 more
doaj   +1 more source

Effect of Lower Surface Roughness on Nonlinear Hydraulic Properties of Fractures

open access: yesGeofluids, 2021
This study investigates the effect of fracture lower surface roughness on the nonlinear flow behaviors of fluids through fractures when the aperture fields are fixed.
Jinglong Li   +5 more
doaj   +1 more source

Coefficient body for nonlinear resolvents

open access: yesAnnales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica, 2020
This paper is devoted to the study of families of so-called nonlinear resolvents. Namely, we construct polynomial transformations which map the closed unit polydisks onto the coefficient bodies for the resolvent families. As immediate applications of our results we present a covering theorem and a sharp estimate for the Schwarzian derivative at zero on
Elin, Mark, Jacobzon, Fiana
openaire   +3 more sources

Technical research of a new type of optical fibre with ultra-low-loss and large effective area

open access: yesDianxin kexue, 2020
The technical solutions of double-cladding waveguide structure and pure SiO2core were taken,the G.654.E type ULA-130 fibre ultra-low-loss and large effective area was realized by F-doping design and optimization of the viscosity match between core and ...
Di HAN   +4 more
doaj  

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