Results 21 to 30 of about 15,905 (167)

Online detection system and its application for mixed-oil interfaces in batch transportation of methanol via refined oil pipelines [PDF]

ObjectiveAccurate detection of quality indicators and mixed oil concentration at the mixed oil interface during the batch transportation of various media (gasoline, diesel, methanol, etc.) in refined oil pipelines is essential for identifying the mixed ...
Chunfeng SONG, Hui SUN, Jinzhou SONG, Liang SHEN, Qiushi CAI, Shujuan QIU, Xiaoyong DING, Yi GUO   +7 more
core   +1 more source

Performance of non‐invasive prenatal testing in vanishing‐twin and multiple pregnancies: results of TRIDENT‐2 study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 738-746, December 2025.
ABSTRACT Objective To evaluate the performance of non‐invasive prenatal testing (NIPT) in vanishing‐twin and multiple pregnancies. Methods This study was conducted as part of the TRIDENT‐2 study, in which NIPT was offered as a first‐tier screening test to women with a multiple pregnancy or vanishing‐twin pregnancy between 1 June 2020 and 31 March 2023 ...
J. C. A. van Eekhout, C. J. Bax, L. van Prooyen Schuurman, E. C. Becking, A. J. E. M. van der Ven, D. Van Opstal, E. M. J. Boon, M. V. E. Macville, M. N. Bekker, R. J. H. Galjaard, on behalf of the Dutch NIPT Consortium, E.A. Sistermans, L. Henneman, A. Polstra, E. Voorhoeve, S.L. Zelderen‐Bhola, E.M.J. Boon, M.P.R. Lombardi, M.C. Bakker, E.J. Bradley, E.M.J. Boon, C. Louwerens‐Zintel, M. Smit, M.C. van Maarle, M.B. Tan‐Sindhunata, K. van der Meij, H. Meij, C.J. Bax, E. Pajkrt, I.H. Linskens, L. Martin, J.T. Gitsels‐van der Wal, R. J. H. Galjaard, D. van Opstal, M.I. Srebniak, F.M. Sarquis Jehee, I.H.I.M. Hollink, F. Sleutels, W. de Valk, W.H. Deelen, A.M.S. Joosten, K.E.M. Diderich, M.E. Redeker, A.T.J.I. Go, M.F.C.M. Knapen, S. Galjaard, A.K.E. Prinsen, A.P.G. Braat, M.J.V. Hoffer, N.S. den Hollander, E.J.T. Verweij, M.C. Haak, M.V.E. Macville, S.J.C. Stevens, A. van der Wijngaard, L.H. Houben, M.A.A. van Esch‐Lennarts, L. Hamers, A.G.P. Jetten, S.A.I. Ghesquiere, B. de Koning, M. Zamani Esteki, C.J. Heesterbeek, C.E.M. de Die‐Smulders, H. Brunner, M.J. Pieters, A.B.C. Coumans, D.F.C.M. Smeets, B.H.W. Faas, D. Westra, M.M. Weiss, I. Derks‐Prinsen, I. Feenstra, M. van Rij, E. Sikkel, R.F. Suijkerbuijk, B. Sikkema‐Raddatz, I.M. van Langen, K. Bouman, L.K. Duin, G.H. Schuring‐Blom, K.D. Lichtenbelt, M.N. Bekker, E. van Vliet‐Lachotzki, J. Pot, A. J. E. M. van der Ven, S van 't Padje   +86 more
wiley   +1 more source

移动式在线监测与负荷监测相结合在GIS故障检测中的应用

Gaoya dianqi, 2015
主要介绍一起移动式在线监测及局放定位在GIS故障检测中的成功应用案例。针对佛山局某220 k V变电站110 k V GIS常规红外检测出现异常的情况,采用移动式局放在线监测系统,结合GIS母线负荷监测技术发现GIS内部缺陷。解体发现该GIS 2号气室第2个连接触头等位线断线,此处支柱绝缘子螺丝松动,支柱绝缘子存在放电痕迹。说明了移动式在线监测方法结合母线负荷监测技术在GIS故障检测中的可行性,值得推广使用。
邱太洪, 李国伟, 王俊波, 何胜红, 陈志平, 胡聪   +5 more
doaj  

Graphical method of detecting linear functions and partial linear functions(线性函数和部分线性函数的图形检测方法)

Zhejiang Daxue xuebao. Lixue ban, 2007
线性函数是布尔代数中常用的特殊函数之一，本文根据线性函数、部分线性函数的定义与性质，提出了检测线性函数与部分线性函数六个定理.在此基础上，给出了基于K图与bj图的线性函数与部分线性函数的图形检测方法，并举例说明具体检测过程.
ZHAOMin-xiao(赵敏笑), CHENDe-xian(陈德仙), CHENXie-xiong(陈偕雄)   +2 more
doaj   +1 more source

Research on Methods of Modeling and Fault Diagnosis for Micro Direct-Current Motors [PDF]

, 2015
直流微电机以体积小、重量轻、便于控制等优点被广泛应用于生产消费领域，在微型精密仪器中尤为重要。为了保证产品出厂品质，生产过程必须对直流微电机进行100%检测。目前检测主要依靠人工的经验来判断电机的好坏，其工作量大，生产效率低，漏检现象严重，导致电机出厂质量不稳定。因此有必要寻找一种简便和可靠的直流微电机在生产线上的故障检测技术。该技术即可以对出厂前的直流微电机进行自动在线检测，以保证直流微电机的出厂合格率；又可以推广应用于其他永磁直流电机的故障检测与诊断。 通过分析空载下直流电机的动态数学模型 ...
谢志平
core  

Research on influence of light region on near infrared spectroscopy for online detection of sugar content of grapefruit [PDF]

[Objective] To improve the accuracy of online measurement of sugar content of grapefruit by near infrared spectroscopy. [Methods] The pomelo online non-destructive testing equipment developed by ourselves was used to collect diffuse transmission spectrum
DAI Xingyong, HU Feng, TANG Ziye, WEN Tao   +3 more
core   +1 more source

Performance of Pt-Based Catalysts for Dimethyl Ether Catalytic Combustion [PDF]

, 2017
利用二甲醚催化燃烧作为二甲醚重整制氢的热源可有效简化系统和提高效率，通过对比不同载体、不同Pt负载量以及不同助剂对Pt催化剂的性能影响，筛选出了最适合二甲醚低温起燃催化燃烧的催化剂.研究发现，HZSM-5型分子筛作为二甲醚催化燃烧载体具有较好的起燃特性，同时加入助剂Ce可以显著提高催化剂活性，起燃温度相对Pt/HZSM-5降低了58℃.Pt-Ce/HZSM-5催化剂的二甲醚起燃特性实验表明，在过量空气系数为1.1时具有最佳的起燃特性.对Pt-Ce/HZSM-5催化剂进行了稳定性实验 ...
伊立其, 叶文, 李青山, 郭常青, 闫常峰   +4 more
core   +1 more source

Effect of aspirin on maternal hemodynamics in Chinese women at high risk for preterm pre‐eclampsia: longitudinal study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.
ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang, J. Lin, Y. Chen, I. S. Wong, J. Liu, F. Liu, S. L. Lau, Q. Zhang, X. Xu, D. S. Sahota, A. P. W. Lee, L. C. Poon   +11 more
wiley   +1 more source

绝缘子检测方法的现状与发展

Dianci bileiqi, 2006
经济、准确地检测绝缘子的方法对于保证输电线路的安全运行具有重要的意义。介绍了目前检测绝缘子几种常用检测方法,综合评价了电场测量法、泄漏电流法、超声波检测法、红外测温法等优缺点。随着对输电线路安全的日益重视,综合输电线路实时在线检测系统是绝缘子检测技术的主流发展趋势。现有在线检测系统能否普遍应用的主要障碍是线路杆塔的数量巨大。指出要实现真正意义上的绝缘子在线检测,应统一规范接口,严格制定免维护质量标准,选取合适的特征量,降低装置的复杂度,选择合理的信号远程传输方式。
朱虎, 李卫国, 林冶
doaj  

Research on Wood Surface Detection Based on Computer Vision [PDF]

, 2016
基于机器视觉技术对板材表面缺陷检测进行研究,设计了在线检测的硬件系统和软件处理流程,介绍了图像预处理、图像分割和目标提取等处理方法并对缺陷图像进行相应处理。利用C#软件对板材缺陷在线检测进行人机交互界面设计和在线调试及在线检测。实验结果表明,本检测方法可行,误检率低,可很好地应用于木材自动化生产过程的在线检测。This paper presents a study into board surface defect detection based on machine vision technology.
冯勇建, 郑志霞, 黄元庆
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