Results 21 to 30 of about 1,063,077 (278)

Instability Condition Derivation for Hydraulic AGC System under Pressure Closed-Loop Control

open access: yesShock and Vibration, 2021
In strip rolling, hydraulic automatic gauge control (HAGC) system is the key element to guarantee the precision of strip gauge. The stability of the kernel pressure closed loop (PCL) in the HAGC system plays an essential role in guaranteeing the rolling ...
Yong Zhu   +6 more
doaj   +1 more source

Homing in on Polaris: A 7 M⊙ first-overtone Cepheid entering the instability strip for the first time [PDF]

open access: yes, 2018
A recently presented HST/FGS parallax measurement of the Polaris system has been interpreted as evidence for the Cepheid Polaris Aa to be pulsating in the second overtone.
R. Anderson
semanticscholar   +1 more source

Stability Analysis of Box Tunnel Working Face under Non-Uniform Support Pressure

open access: yesApplied Sciences, 2023
For rectangular section tunnel construction, soil bin pressure fluctuates under biaxial emergence conditions. Support pressure is difficult to uniformly distribute, and it can easily cause instability of the tunneling face.
Xuanyang Zhang   +4 more
doaj   +1 more source

The occurrence of binary evolution pulsators in classical instability strip of RR Lyrae and Cepheid variables [PDF]

open access: yes, 2016
Single star evolution does not allow extremely low-mass stars to cross the classical instability strip (IS) during the Hubble time. However, within binary evolution framework low-mass stars can appear inside the IS once the mass transfer (MT) is taken ...
P. Karczmarek   +7 more
semanticscholar   +1 more source

Numerical simulation and experimental research on cracking mechanism of twin-roll strip casting

open access: yesHigh Temperature Materials and Processes, 2022
Based on the three-dimensional field of molten pool and twin-roll strip casting experiments, this work verified the cracking mechanism of the strip by establishing mathematical model and rolling experiments. The results showed that due to the instability
Lv Zheng   +7 more
doaj   +1 more source

High-resolution spectroscopy and abundance analysis of δ Scuti stars near the γ Doradus instability strip [PDF]

open access: yes, 2017
$\delta$ Scuti stars are remarkable objects for asteroseismology. In spite of decades of investigations, there are still important questions about these pulsating stars to be answered, such as their positions in $\log$$T_{\rm eff}$ $-$ $\log g$ diagram ...
F. Aliçavuş   +9 more
semanticscholar   +1 more source

Pulsating hot O subdwarfs in ω Centauri: mapping a unique instability strip on the extreme horizontal branch [PDF]

open access: yes, 2016
We present the results of an extensive survey for rapid pulsators among Extreme Horizontal Branch (EHB) stars in ω Cen. The observations performed consist of nearly 100 h of time-series photometry for several off-centre fields of the cluster, as well as ...
S. Randall   +12 more
semanticscholar   +1 more source

Spatiotemporal dynamics for a diffusive mussel–algae model near a Hopf bifurcation point

open access: yesAdvances in Difference Equations, 2021
In this paper, the Hopf bifurcation and Turing instability for a mussel–algae model are investigated. Through analysis of the corresponding kinetic system, the existence and stability conditions of the equilibrium and the type of Hopf bifurcation are ...
Shihong Zhong, Xuehan Cheng, Biao Liu
doaj   +1 more source

BLUE STRAGGLER MASSES FROM PULSATION PROPERTIES. II. TOPOLOGY OF THE INSTABILITY STRIP [PDF]

open access: yes, 2015
We present a new set of nonlinear, convective radial pulsation models for main-sequence stars computed assuming three metallicities: Z = 0.0001, 0.001, and 0.008. These chemical compositions bracket the metallicity of stellar systems hosting SX Phoenicis
Giuliana Fiorentino   +7 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy