Results 61 to 70 of about 257 (165)
Seismic analysis and design of tunnels within fault ground: A review
Deep Underground Science and Engineering, EarlyView.The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang +6 more
wiley +1 more source
Ecography, EarlyView.The spatial ecology of stalk‐and‐ambush predators like the Eurasian lynx Lynx lynx depends on prey availability and environmental features, yet the relative roles of these factors remain unclear at large spatial scales. In this study, we analysed lynx habitat use across central and southern Finland using snow‐track data from the Wildlife Triangle ...
Francesca Malcangi +4 more
wiley +1 more source
Ecography, EarlyView.Despite extensive research, stabilizing mechanisms in ecosystems remain uncertain. Taylor's power law (TPL) is a pervasive ecological pattern that describes how variance scales with mean abundance (σ2 = aμᵇ). While TPL has been widely studied within populations, its role across species within communities and its implications for stability remain ...
Clara Gracia +33 more
wiley +1 more source
Research and Application of 300 ℃ Directional Drilling System
Shiyou jixie, 2018 The typical directional drilling systems have a maximum operating temperature rate between 150 ℃ and 175 ℃, and only a few are above 200 ℃, which incapable of withstanding the high temperature of 300 ℃ in geothermal wells of enhanced geothermal systems ...
Hou Baodong +3 more
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Simulation of colloidal slip with double friction force in automatic directional drilling
Meikuang AnquanThe automation degree of sealing technology in coal mine is insufficient, and the automatic directional drilling rig can improve the automation degree of sealing.
Shuhan SHI +6 more
doaj +1 more source
Design and Exploitation Problems of Drill String in Directional Drilling [PDF]
Acta Montanistica Slovaca, 2004 Drill string design for directional drilling requires accounting for a number of factors. First, types and expected values of loads should be determined.
Bednarz Stanislaw
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FlexMat, EarlyView.Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu +3 more
wiley +1 more source
Meikuang AnquanAiming at the problems such as low construction efficiency and high labor intensity in the process of lowering large diameter casing through the broken stratum of complex roof high level drilling in coal mine, a large diameter casing lowering device is ...
Zhi LIU, Chao XU, Lei JIANG
doaj +1 more source
Emerging single‐element ferroelectrics: From theory to experiment
InfoMat, EarlyView.This review explores recent developments in single‐element ferroelectrics, covering mechanisms of ferroelectric behavior, their crystal structures, key preparation methods, ferroelectric performance characteristics, and promising device applications in field‐effect transistors, photodetectors, and visual perceptrons.
Run Zhao +7 more
wiley +1 more source
Известия высших учебных заведений: Нефть и газ, 2015 A problem of construction of pipeline crossings through different obstacles using directional drilling technology is considered. Based on the results of the study of pipeline crossings construction the basic requirements towards the drilling technology ...
Yu. I. Spektor +2 more
doaj +1 more source