Results 221 to 230 of about 228,844 (310)

Stability analysis and noise reduction of a cone-type poppet valve in an aero-hydraulic system. [PDF]

Sci Rep
Chen W, Chen Y, Xu Y, Zhang L.
europepmc   +1 more source

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

Deep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan, Haijiang Li, Hongqiang Xie, Mingli Xiao, Jianliang Pei, Huaizhong Liu, Jiangda He   +6 more
wiley   +1 more source

Aerospace aluminum surface defect detection method based on Multi-Scale Convolution and attention mechanism. [PDF]

Sci Rep
Zhang R, Cai S, He Z, Zhao Y.
europepmc   +1 more source

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +1 more source

Causes and consequences of Arctic amplification elucidated by coordinated multimodel experiments. [PDF]

Commun Earth Environ
Screen JA, Audette A, Blackport R, Deser C, England M, Feldl N, Gervais M, Hay S, Kushner PJ, Liang YC, Msadek R, Mudhar R, Sigmond M, Smith D, Sun L, Yu H.   +15 more
europepmc   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Quantifying the mixing behavior of direct injected hydrogen in high-pressure environments by Rayleigh scattering. [PDF]

Appl Phys B
Peters M, Maes N, Dam N, van Oijen J.
europepmc   +1 more source

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Health Effects Associated With Jet Fuel Exposure: Methods for a Fit-for-Purpose Systematic Review and Systematic Evidence Map. [PDF]

J Occup Environ Med
Bergeron JG, Cameron RL, Goodman SJ, Sprowles JLN, Snow SJ, Eftim SE, Haver CE, Vincent-Hall TD.   +7 more
europepmc   +1 more source