Results 21 to 30 of about 25,560,076 (290)

Condition Monitoring of Internal Combustion Engines in Thermal Power Plants Based on Control Charts and Adapted Nelson Rules

open access: yesEnergies, 2021
In thermal power plants, the internal combustion engines are constantly subjected to stresses, requiring a continuous monitoring system in order to check their operating conditions. However, most of the time, these monitoring systems only indicate if the
Fernanda Mitchelly Vilas Boas   +12 more
doaj   +1 more source

Contact Fatigue Behavior Evolution of 18CrNiMo7-6 Gear Steel Based on Surface Integrity

open access: yesMetals, 2023
In this work, the surface integrity (surface morphology, microstructure, microhardness, residual stress) of contact fatigue (CF) samples with different numbers of running cycles was comprehensively studied.
Luji Wu   +4 more
doaj   +1 more source

Electrical Evaluation of Oil-Immersed Power Transformers Based on Temporal Variations in Performance Index and Reliability

open access: yesAdvances in Electrical and Computer Engineering, 2023
In electrical systems, power transformer failure prediction is a strategic procedure aimed at ensuring the uninterrupted delivery of electricity. In this context, companies of electricity employ predictive maintenance techniques to evaluate the status ...
DIAS, Y.   +3 more
doaj   +1 more source

VDS and VGS Depolarization Effect on SiC MOSFET Short-Circuit Withstand Capability Considering Partial Safe Failure-Mode

open access: yesEnergies, 2021
This paper presents a detailed analysis of 1200 V Silicon Carbide (SiC) power MOSFET exhibiting different short-circuit failure mechanisms and improvement in reliability by VDS and VGS depolarization.
Yazan Barazi   +3 more
doaj   +1 more source

Summary Statement on Cardiopulmonary Exercise Testing in Chronic Heart Failure due to Left Ventricular Dysfunction Recommendations for Performance and Interpretation

open access: yesMonaldi Archives for Chest Disease, 2016
Cardiopulmonary exercise testing (CPET) is a non-invasive tool that provides the physician with relevant information to assess the integrated response to exercise involving pulmonary, cardiovascular, haematopoietic, neuro-psychological, and skeletal ...
Ugo Corrà, Massimo F. Piepoli
doaj   +1 more source

Electron-beam radiation induced degradation of silicon nitride and its impact to semiconductor failure analysis by TEM

open access: yesAIP Advances, 2018
By in-situ transmission electron microscopy (TEM), we performed a detailed study on the electron-beam radiation damage to nanostructured silicon nitride thin-film process layers in a typical semiconductor NVM device.
Binghai Liu   +6 more
doaj   +1 more source

Creep Failure of Reformer Tubes in a Petrochemical Plant

open access: yesMetals, 2019
This paper investigates a failure in HP-Mod radiant tubes in a petrochemical plant. Tubes fail after 90,000 h of working at 950 °C. Observed failure is in the form of excessive bulging and longitudinal cracking in reformer tubes.
Abbas Bahrami, Peyman Taheri
doaj   +1 more source

High-Strength Bolt Corrosion Fatigue Life Model and Application

open access: yesThe Scientific World Journal, 2014
The corrosion fatigue performance of high-strength bolt was studied. Based on the fracture mechanics theory and the Gerberich-Chen formula, the high-strength bolt corrosion fracture crack model and the fatigue life model were established.
Wang Hui-li, Qin Si-feng
doaj   +1 more source

Current status and development trend of laser remanufacturing of short stress path rolling mill

open access: yesCailiao gongcheng, 2019
The short-stress-path rolling mill is a mechatronics equipment which is widely used in the steel manufacturing industry. China has the largest number of used rolling mills in the world.
ZHANG Bin   +5 more
doaj   +1 more source

Understanding the Factors and Consequences of Gas Deflagration Accident in Metro Shield Tunnel: Site Investigation and Numerical Analysis

open access: yesBuildings, 2023
This study aims to investigate the factors and consequences of gas deflagration accidents in metro shield tunnels based on on-site investigation and numerical analysis.
Yi Shen   +4 more
doaj   +1 more source

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