Results 31 to 40 of about 341,388 (268)
Frontiers in Earth Science, 2023 During coal mining, the deformation and failure of a weakly cemented soft rock roadway roof could cause difficulties for roadway support. In this paper, a combination of on-site measurement and theoretical analysis is used to solve this issue.
Kai Zhou +9 more
doaj +1 more source
Analysis of DC voltage oscillation mechanism in AC/DC hybrid distribution system
The Journal of Engineering, 2019 DC voltage oscillation occurs more and more frequently in voltage source converter (VSC)-based AC/DC hybrid distribution system (AC/DC HDS). However, currently, the explanation of the oscillation mechanism is not clear enough.
Luyang Li +4 more
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Cause Analysis of a Post-frontal Extreme Rainstorm on the Northeast Side of Qinghai-Xizang Plateau
Gaoyuan qixiangOn August 13-14， 2022， an extreme rainstorm event occurred in Yuzhong region of Gansu Province， northeast of the Qinghai-Xizang Plateau.Accumulated daily precipitation reached 130.6 mm and the maximum hourly precipitation was 36.6 mm， breaking the ...
Jing FU +5 more
doaj +1 more source
Seismic Response of Aeolian Sand High Embankment Slopes in Shaking Table Tests
Applied Sciences, 2019 Aeolian sand high embankments are always damaged by earthquakes; however, little research has addressed this so far. In this study, shaking table tests were conducted on three aeolian sand high embankment models.
Zhijun Zhou +3 more
doaj +1 more source
Three dimensional flutter analysis and wind-tunnel experiments of slender webs in cross flow
Nihon Kikai Gakkai ronbunshu, 2017 This paper presents a three dimensional flutter analysis of slender webs under tension in cross flow. In the flutter analysis, Doublet-point method based on the unsteady lifting surface theory is used to calculate unsteady fluid force acting on the web ...
Keiichi HIROAKI +2 more
doaj +1 more source
Energies, 2020 In view of problems with roadways with a compound roof, such as the occurrence of instability in the roof strata, ease of separation of the layer caving, difficulty of maintenance, and poor safety, we established a mechanical calculation model of a ...
Yang Yu +4 more
doaj +1 more source
The saturation mechanism of thermal instability
Frontiers in Astronomy and Space Sciences, 2023 The literature on thermal instability (TI) reveals that even for a simple homogeneous plasma, the nonlinear outcome ranges from a gentle reconfiguration of the initial state to an explosive one, depending on whether the condensations that form evolve in ...
Tim Waters, Daniel Proga, Daniel Proga
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Taiyuan Ligong Daxue xuebao, 2022 The status quo of the research on the face instability mechanism of shield tunnel is reviewed. The key issure of soil arching effect during shield tunnel face instability is discussed.
Huayang LEI, Min LIU
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A Study on the Mechanism of the Precipitation-Induced Slope Instability of Colluvium
Applied SciencesIn this study, the evolution process of a landslide model under continuous rainfall conditions with a rainfall intensity of 30 mm/h is studied in depth based on an outdoor rainfall model test of a colluvial slope as the research material.
Jingying Wang +3 more
doaj +1 more source
FEBS Letters, EarlyView.An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley +1 more source