Experimental study on effect of freezing time of liquid CO2 on pore structure of coal
Meikuang Anquan, 2022 In order to promote gas drainage in low-permeability coal seams, implement the optimization of enhancing permeability and promoting gas drainage technology by liquid CO2 injection into freeze-thaw cracked coal seams, taking Changcun Coal Mine as the ...
ZHANG Huifeng
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Structural Health Monitoring of Large Structures Using Acoustic Emission-Case Histories [PDF]
, 2019 Acoustic emission (AE) techniques have successfully been used for assuring the structural integrity of large rocket motorcases since 1963 [...
Ono, Kanji
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Propagation Laws of Ultrasonic Continuous Signals at the Transmitting Transducer–Soil Interface
AgricultureUltrasonic detection is one of the main methods for information detection and has advantages in soil detection. Ultrasonic signals attenuate in soil, resulting in unique propagation laws.
Zhinan Wang +5 more
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Nondestructive testing method of SiCp particle dispersion in SiCp/AZ91D magnesium matrix composites
Cailiao gongcheng, 2023 SiCp/AZ91D magnesium matrix composites are widely used in the aerospace field, but there is less report on the distribution of SiCp particles in SiCp/AZ91D magnesium matrix composites by ultrasonic testing methods at home and abroad.
HU Ke +4 more
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A Robust Approach to Optimal Matched Filter Design in Ultrasonic Non-Destructive Evaluation (NDE) [PDF]
, 2016 The matched filter was demonstrated to be a powerful yet efficient technique to enhance defect detection and imaging in ultrasonic non-destructive evaluation (NDE) of coarse grain materials, provided that the filter was properly designed and optimized ...
Hayward, Gordon, Li, Minghui
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Applied SciencesThe timely identification of rail internal defects and the application of corresponding preventive measures would greatly reduce catastrophic failures, such as rail breakage.
Sicheng Wang +7 more
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A match coefficient approach for damage imaging in structural components by ultrasonic synthetic aperture focus [PDF]
, 2017 Ultrasonic Synthetic Aperture Focus (SAF) techniques are commonly used to image structural defects. In this paper, a variation of SAF based on ideas borrowed from Matched Field Processing (MFP) is evaluated to reduce artifacts and sidelobes of the ...
Lanza di Scalea, F. +4 more
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Laser ultrasonic detection method and test for inner surface cracks of X80 pipelines
You-qi chuyun, 2021 As X80 pipelines are applied in large scale, the safety of long-term service of long-distance oil and gas pipelines has attracted much attention. In order to solve the problem of detecting the inner surface crack defects of pipelines, experimental ...
Jian-shu CAO, Bao-ping JI, Wei-ke JI
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Autonomous Vehicle Ultrasonic Sensor Vulnerability and Impact Assessment [PDF]
, 2018 Vehicles today are relying more on technologies to bring about fully autonomous features. The conventional wirings within are being simplified into a network of electronic components, and this network is controlled via advanced sensing of the environment
Keoh, Sye Loong +2 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source