Results 11 to 20 of about 49,636 (166)
, 2004 对国内外近 10年中管道泄漏检测技术的研究状况做了跟踪分析。泄漏检测分为直接检测技术和间接检测技术 2类 ,前者分为 8种 ,后者分为 9种。简要分析了各种检测技术的检测原理和优缺点 ;对各种检测方法进行了比较 ,得到各种检测方法的适用范围。由于工作环境、工作对象的不同 ,应选择合适的检漏方法。如在长距离管道检测中 ,应采用机载红外线检测法、压力点分析法、压力波法、质量平衡法等 ,而在油田管网或场内管网的短距离管道输送中 ,宜采用PPA法、压力波法 ...
喻西崇, 贺志刚, 孙军, 付道明
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, 2003 本文对国内外最新泄漏检测技术进行了跟踪,将泄漏检测技术分为直接检测技术和间接检测技术两种,其中直接检测技术分为8种,间接检测技术分为9种。本文分析了各种检测技术的检测原理、优缺点以及现场应用情况;对各种检测方法进行了比较,得到各种检测方法的适用范围 ...
喻西崇 +5 more
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 27-33, January 2026.ABSTRACT Objective To assess the effectiveness of the first‐trimester anomaly scan (FTAS) performed as part of a centrally steered national screening program in The Netherlands by investigating false‐negative cases with a fetal structural anomaly that was not detected at the FTAS.
K. Bronsgeest +18 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 747-753, December 2025.ABSTRACT Objective Ultrasound‐based fetal growth assessment is an essential part of clinical decision‐making in modern obstetric care. This study aimed to evaluate the impact of maternal and fetal characteristics on the accuracy and precision of sonographic fetal weight estimation.
M. Granfors +4 more
wiley +1 more source
Detection of canine external ear canal lesions using artificial intelligence
Veterinary Dermatology, Volume 36, Issue 4, Page 424-432, August 2025.Background – Early and accurate diagnosis of otitis externa is crucial for correct management yet often can be challenging. Artificial intelligence (AI) is a valuable diagnostic tool in human medicine. Currently, no such tool is available in veterinary dermatology/otology.
Neoklis Apostolopoulos +3 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 4, Page 470-479, October 2024.ABSTRACT Objectives Our aim was to examine the prenatal profiles of pregnancies affected by an atypical chromosomal aberration, focusing on pathogenic copy‐number variants (pCNVs). We also wanted to quantify the performance of combined first‐trimester screening (cFTS) and a second‐trimester anomaly scan in detecting these aberrations. Finally, we aimed
K. Gadsbøll +6 more
wiley +1 more source
Gaoya dianqi, 2010 总结了SF6开关设备气体渗漏的特点、现场表现及原因;讨论了解体除漏与带压堵漏的风险决策问题;介绍了泡沫法、定性检漏仪报警检漏法、包扎加定量检漏仪检漏法、激光成像检漏仪检漏法等常用检漏方法;阐述了检漏方法选择的观点;对带压堵漏进行了理论计算,介绍了几种漏点消除方法;最后介绍了几次现场检漏与漏点处理的典型案例。得出定性检漏仪和泡沫检漏法结合使用,操作简单,能提高检漏效率和成功率。
佟智勇, 甄利, 张远超
doaj
Gaoya dianqi, 2016 文中分析了气体绝缘开关设备气箱的泄漏机理和泄漏率的计算方法,详细介绍了氦检漏仪的原理、结构、优缺点、氦检漏仪的维修保养、计量校准,以及氦检漏的工艺过程和注意事项,证明了充SF6、氮气和干燥空气的气箱使用氦气检漏方法可以更准确地检测泄漏率和泄漏点。
吴卫东, 王陆一
doaj
, 2003 本发明涉及激光成像的检漏方法和装置。它包括激光器、充有被测介质的气瓶、成像仪和监视器，其中被检测物置于激光器的输出光前方，成像仪的镜头对着被检测物放置，成像仪和监视器电连接；充有被测介质的气瓶与被检测物之间通过管道连接。检漏方法用本发明的装置，先将被测介质充在被检测物内，然后打开激光器，在激光照射下，当被测介质泄漏时，使泄漏气体与周围的环境有一个温差 ...
董志成 +5 more
core +2 more sources
Gaoya dianqi, 2014 通过应用SF6红外成像检漏仪与SF6定量检漏仪进行模拟、对比试验,对SF6红外成像检漏的检测灵敏度进行量化研究,同时研究了风速、温度等外部因素对检测灵敏度的影响情况,对SF6红外成像检漏仪与SF6定量检漏仪的现场使用经验进行了有益的探索。
胡连清 +4 more
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