Results 11 to 20 of about 727,063 (285)

Electrical Modelling of Switching Arcs in a Low Voltage Relay at Low Currents

Energies, 2020
The arc behaviour of short, low current switching arcs is not well understood and lacks a reliable model. In this work, the behaviour of an arc in the air is studied during contact separation at low DC currents (0.5 A to 20 A) and for small gap lengths ...
Ammar Najam, Petrus Pieterse, Dirk Uhrlandt   +2 more
doaj   +1 more source

Study on arc extinguishing characteristics of multiple series gap under long clearances

AIP Advances, 2022
In order to improve the arcing capability of multiple series gaps, it is very important to understand the arcing principle and the influence of the control length of airflow passage on the arcing process.
Zijian Li, Jianjin Fu, Xueming Zhou, Zhiqiang Feng, Yao Yao, Jufeng Wang   +5 more
doaj   +1 more source

Method of estimating the lateral vibration of an elevator rope from the vertical vibration of a compensating sheave

Journal of Asian Architecture and Building Engineering, 2023
Observing the vibration of the elevator ropes in an elevator shaft is a difficult task. Although several methods of observing the displacement using image processing or laser displacement meters and then estimating the vibration through an observer or a ...
Nanako Miura, Tomohiro Matsuda, Yoshiyuki Higashi, Hiroyuki Ono, Xuan Thuan Nguyen   +4 more
doaj   +1 more source

Subclasses of Normal Helly Circular-Arc Graphs [PDF]

, 2011
A Helly circular-arc model M = (C,A) is a circle C together with a Helly family \A of arcs of C. If no arc is contained in any other, then M is a proper Helly circular-arc model, if every arc has the same length, then M is a unit Helly circular-arc model,
Bang-Jensen, Bhowmick, Booth, Corneil, Crespelle, Deng, Deogun, Durán, Fishburn, Francisco J. Soulignac, Fulkerson, Gardi, Gavril, Gilmore, Golumbic, Habib, Hedman, Hell, Hell, Hell, Hsu, Huang, Jayme L. Szwarcfiter, Joeris, Kaplan, Kaplan, Korte, Kratsch, Lekkerkerker, Lin, Lin, Lin, Lin, Lin, Lin, Lin, Lin, Looges, McConnell, McKee, Min Chih Lin, Mitas, Müller, Nussbaum, Roberts, Roberts, Skrien, Tucker, Tucker   +48 more
core   +3 more sources

Affine Shape Comparison using Different Distances

JOIV: International Journal on Informatics Visualization, 2020
In this work, we propose to compare affine shape using Hausdorff distance (HD), Dynamic Time Warping (DTW), Frechet (DF), and Earth Mover distance (EMD).
Khalid Aznag, Toufik Datsi, Ahmed El Oirrak, Essaid El Bachari   +3 more
doaj   +1 more source

Observational Arc-Length Effect on Orbit Determination for Korea Pathfinder Lunar Orbiter in the Earth-Moon Transfer Phase Using a Sequential Estimation

Journal of Astronomy and Space Sciences, 2019
In this study, the observational arc-length effect on orbit determination (OD) for the Korea Pathfinder Lunar Orbiter (KPLO) in the Earth-Moon Transfer phase was investigated.
Kim, Youngrok, Song, Young-Joo
doaj   +1 more source

Imagining circles: empirical data and a perceptual model for the arc-size illusion [PDF]

, 2016
An essential part of visual object recognition is the evaluation of the curvature of both an object's outline as well as the contours on its surface. We studied a striking illusion of visual curvature--the arc-size illusion (ASI)--to gain insight into ...
Kingdom, Frederick A.A., Loffler, Gunter, Ouhnana, Marouane, Schmidtmann, Gunnar   +3 more
core   +2 more sources

Effect of pulse frequency on arc behavior and droplet transfer of 2198 Al–Li alloy by ultrahigh-frequency pulse AC CMT welding

Journal of Materials Research and Technology, 2019
In this study, 2198 Al–Li alloy, a low density and high-performance material for aerospace equipment, was welded using ultrahigh-frequency pulse alternating current cold metal transfer (UHF-ACCMT) welding technique.
Dianlong Wang, Chaofeng Wu, Yingchao Suo, Liwei Wang, Zhimin Liang   +4 more
doaj   +1 more source

Theory of optimum shapes in free-surface flows. Part 2. Minimum drag profiles in infinite cavity flow [PDF]

, 1972
The problem considered here is to determine the shape of a symmetric two-dimensional plate so that the drag of this plate in infinite cavity flow is a minimum.
Whitney, Arthur K.
core   +1 more source

Arc Interference Behavior during Twin Wire Gas Metal Arc Welding Process

Advances in Materials Science and Engineering, 2013
In order to study arc interference behavior during twin wire gas metal arc welding process, the synchronous acquisition system has been established to acquire instantaneous information of arc profile including dynamic arc length variation as well as ...
Dingjian Ye, Xueming Hua, Yixiong Wu
doaj   +1 more source