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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
Fruit variety and freshness recognition method based on YOLO-FFD [PDF]
Objective: In order to improve the situation that existing fruit recognition and classification methods rely on manual operation and complex equipment.
CHEN Liangyan +4 more
core +1 more source
Research on Control System of Automatic Transmitter Leak Detection Device [PDF]
, 2012 随着经济的发展，社会的进步，市场需求的不断增加，大规模、快速的全自动化生产已经成为国内发展的趋势，特别是劳动力市场的日益紧缺，自动化生产是今后企业发展和生存的必由之路。在变送器的生产中，也是同样如此，变送器生产过程中的一道重要工序检漏，在国内目前仍旧采用传统的手工方式，不仅效率低，还影响了产品的稳定性。将其工序改为自动化检测，不仅可以提高其生产效率、降低生产成本，而且提升产品的质量和稳定性、实现变送器检漏自动化。 本文研究采用机器视觉技术，通过可编程控制器和人机界面，设计全自动变送器检漏装置的控制系统 ...
张剑伟
core
Image recognition method of coal gangue in complex working conditions based on CES-YOLO algorithm [PDF]
Aiming at the complex working conditions environmental factors such as high noise, low illumination, motion blur and mass gangue mixing in coal mines, which lead to the problems of misdetection, omission and low detection accuracy in gangue recognition ...
Deyong LI +4 more
core +1 more source
Shot boundary detection algorithm based on ORB [PDF]
, 2013 The existing algorithms of SBD show low robustness when there exist camera or object movements, light changes in the scene. An SBD algorithm based on ORB was proposed in order to effectively deal with these changes, in which shot boundary was located by ...
Dong-ming ZHANG +5 more
core +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
Detection Method of Water-Surface Obstacles for Unmanned Ships Based on Panoramic Vision [PDF]
During the navigation of an unmanned ship, an inadequate perspective may cause obstacles on the water-surface to be missed.To enable the safe and normal operation of unmanned ships, this study proposes a panoramic vision-based method for the detection of
Jintao ZHOU, Diju GAO, Zhiquan LIU
core +1 more source
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
Theoretical Analysis on the Leakage Characteristics of HFC-161/125/32 as an Alternative Refrigerant to HCFC-22 [PDF]
, 2011 The effect factors that influence the leakage characteristics of HFC-161/125/32,a new alternative refrigerant for HCFC-22,were discussed.Corresponding leakage models were built and the mass ratio variations of each component under gas phase isothermal ...
core +1 more source
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
doaj