Results 11 to 20 of about 6,305,091 (339)

In-service automatic welding technology for high-grade large-diameter oil and gas pipelines

open access: yesYou-qi chuyun, 2021
As more long-distance oil and gas pipelines with high pressure, large diameter, high steel grade and large wall thickness are constructed, the wall of the fittings such as the hot tapping tees and the repair sleeves that are involved in the in-service ...
Juan CHEN   +7 more
doaj   +1 more source

Calculation and Analysis of Vibration Stress of Guangxi Nanning Subway during Operation

open access: yesAdvances in Civil Engineering, 2022
In this study, based on the Mindlin solution in elastic half-space, the stress calculation formula was determined with consideration of any point in the foundation under the dynamic amplification effect.
Zhenchao Chang   +9 more
doaj   +1 more source

Research progress of laser additive repair technology for military aircraft metal parts

open access: yesJournal of Aeronautical Materials, 2023
Laser additive repair technology is suitable to repair the metal parts of military aircraft. It is an important thrust to prolong the flight service life and improve the ability of independent maintenance.
XU Jinjun   +6 more
doaj   +1 more source

From Corrective to Predictive Maintenance—A Review of Maintenance Approaches for the Power Industry

open access: yesItalian National Conference on Sensors, 2023
Appropriate maintenance of industrial equipment keeps production systems in good health and ensures the stability of production processes. In specific production sectors, such as the electrical power industry, equipment failures are rare but may lead to ...
M. Moleda   +4 more
semanticscholar   +1 more source

Fault Path Direct-Current Resistance Based Off-Line Single-Phase-To-Ground Fault Location

open access: yesZhongguo dianli, 2021
In order to figure out the off-line transmission line fault location, a new fault location method based on fault path direct current resistance measurement is proposed.
Fuzhi LI   +6 more
doaj   +1 more source

On Predictive Maintenance in Industry 4.0: Overview, Models, and Challenges

open access: yesApplied Sciences, 2022
In the era of the fourth industrial revolution, several concepts have arisen in parallel with this new revolution, such as predictive maintenance, which today plays a key role in sustainable manufacturing and production systems by introducing a digital ...
Mounia Achouch   +6 more
semanticscholar   +1 more source

Research on Beidou and GPS dual satellite positioning algorithms for substation site positioning

open access: yesInternational Journal of Metrology and Quality Engineering, 2020
With the rapid development of global satellite navigation system technology, multi-mode satellite navigation positioning technology that can be compatible with multiple navigation systems at the same time is bound to become the future development trend ...
Feng Junjie   +3 more
doaj   +1 more source

Evaluating Patient Preferences of Maintenance Therapy for the Treatment of Chronic Obstructive Pulmonary Disease: A Discrete Choice Experiment in the UK, USA and Germany. [PDF]

open access: yes, 2020
Introduction: With increasing availability of different treatments for chronic obstructive pulmonary disease (COPD), we sought to understand patient preferences for COPD treatment in the UK, USA, and Germany using a discrete choice experiment (DCE ...
Doll, HA   +7 more
core   +1 more source

Failure Mode Analysis and Maintenance of Railway Overhead Line Rigid Stainless Steel Droppers and Multi-Strand Copper Jumpers

open access: yesIET Electrical Systems in Transportation, 2023
Droppers and jumpers are important components of railway overhead line electrification. Their effective maintenance is critical for the railway’s safe and reliable operation; the consequences of their failure can be disproportionally serious.
Jingyu Du   +4 more
doaj   +1 more source

PROBLEM OF USING WASTE OF PAINT AND VARNISHING MATERIALS AND THEIR DISPOSAL

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2020
The relevance of the research. Corrosion of metals is the most important problem with which large losses of metals are associated. Hundreds of tons of metals are irretrievably lost annually from corrosion, therefore, all studies aimed at the corrosion ...
Aida L. Barkhanadzhyan   +5 more
doaj   +1 more source

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