Results 71 to 80 of about 3,511 (220)

Orographic gravity‐wave drag over multiple bell‐shaped mountains

open access: yesQuarterly Journal of the Royal Meteorological Society, Volume 150, Issue 761, Page 2397-2417, April 2024 Part B.
Mountains exert a drag on the atmospheric flow through breaking gravity waves, known as orographic gravity‐wave drag (OGWD). We derive OGWD analytically for multiple three‐dimensional bell‐shaped mountains, while previous studies have derived OGWD for a single mountain. We take into account the geometric overlap between the mountains, vertical shear of
Ui‐Jin Kwon, Sungsu Park
wiley   +1 more source

Ultrasonic Inspection Results Obtained in the ENIQ 2nd Pilot Study [PDF]

open access: yes, 2007
This report is a compilation of the ultrasonic non-destructive inspections results obtained on the ENIQ 21 BWR-type nozzle to shell weld mock-up. The report has been divided into three different sections 1) Report on inspection results obtained on the ...
ERIKSEN BRIAN, MELBI Mikael
core  

ECMWF and UK Met Office Offshore Blowing Winds: Impact of Horizontal Resolution and Coastal Orography

open access: yesJournal of Geophysical Research: Atmospheres, Volume 129, Issue 6, 28 March 2024.
Abstract We analyze the performance of the European Centre for Medium‐Range Weather Forecasts (ECMWF) and UK Met Office (UKMO) meteorological models in predicting offshore blowing wind in coastal areas. Our attention is mainly on the Mediterranean coast, up to 200 km distance from the shore. We compare forecast neutral winds with Advanced Scatterometer
L. Cavaleri   +7 more
wiley   +1 more source

Research on the capacity cost allocation and the electricity capacity price optimization method for a power system based on the BARY‐GA algorithm

open access: yesEnergy Science &Engineering, Volume 12, Issue 1, Page 168-180, January 2024.
Description: This work studied and proposed a mechanism for the formation of capacity and electricity prices based on the proportion of allowed income and fixed costs at different voltage levels. The genetic algorithm (GA) has been proposed to calculate the electricity capacity price and electricity quantity's electricity price at all levels of load ...
Hang Liu   +4 more
wiley   +1 more source

Evaluating Maximum Likelihood Estimation Methods to Determine the Hurst Coefficient [PDF]

open access: yes, 1999
A maximum likelihood estimation method implemented in S-PLUS (S-MLE) to estimate the Hurst coefficient (H) is evaluated. The Hurst coefficient, with 0.5\u3cHS-MLE was developed to estimate H for fractionally differenced (fd) processes.
Bassingthwaighte, J. B.   +2 more
core   +1 more source

Principles and applications of ultrasonic-based nondestructive methods for self-healing in cementitious materials [PDF]

open access: yes, 2017
Recently, self-healing technologies have emerged as a promising approach to extend the service life of social infrastructure in the field of concrete construction.
Ahn, Eunjong   +4 more
core   +2 more sources

Generation of localized modes in an electrical lattice using subharmonic driving [PDF]

open access: yes, 2012
We show experimentally and numerically that an intrinsic localized mode (ILM) can be stably produced (and experimentally observed) via subharmonic, spatially homogenous driving in the context of a nonlinear electrical lattice.
Candiani, P.   +6 more
core   +1 more source

ALGORITMO QUE REDUCE DISTORSIÓN DE IMÁGENES ULTRASÓNICAS EN ENSAYOS NO DESTRUCTIVOS

open access: yesVisión Electrónica, 2014
Este artículo describe la investigación y el desarrollo de un sistema para la formación de imágenes por difracción de tiempo de vuelo (TOFD). El proceso para generarlas se logra con base en la adquisición de señales A-Scan, producto de la exploración de ...
Darío Segura
doaj  

Approaching code-compliant Non-Destructive Testing of carbon steel weld using Total Focusing Method technique

open access: yese-Journal of Nondestructive Testing
The Total Focusing Method (TFM) technique is an advanced Non-Destructive Testing (NDT) Ultrasonic Testing (UT) technique. It is usually used together with special acquisition configurations such as Full Matrix Capture (FMC) or Plane Wave Imaging (PWI ...
Wang Ke, Weina Ke
doaj   +1 more source

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