Results 31 to 40 of about 9,953 (194)
Assessment of risk for pre‐eclampsia at mid‐gestation to define subsequent care
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 6, Page 694-702, June 2025.ABSTRACT Objective To stratify pregnancy care based on the estimated risk of pre‐eclampsia (PE) from screening at 19–24 weeks' gestation by combinations of maternal risk factors, estimated fetal weight (EFW), mean arterial pressure (MAP) and uterine artery pulsatility index (UtA‐PI).
S. Adjahou +5 more
wiley +1 more source
Finite Element Analysis of Eddy Current Testing of Carbon Fiber Reinforced Polymers [PDF]
, 2014 碳纤维增强型复合材料因其优越的性能在飞机制造、汽车制造、化工、造船与电气设备等领域得到广泛的应用，尤其是在航空、船舰、核能设备等方面受到高度重视。然而，复合材料结构在制造和使用过程中不可避免地会存在缺陷和遭受损伤。并且，碳纤维复合材料在损坏之前几乎没有先兆，其破坏具有突然性，这往往会造成严重的后果。因此对碳纤维复合材料进行损伤检测显得尤为重要。 目前应用较多的碳纤维复合材料检测方法有红外检测、X射线检测、超声检测等，这些技术都达到了一定的检测效果。使用涡流检测技术来检测碳纤维复合材料的研究则很少 ...
孙磊
core
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 5, Page 624-632, May 2025.ABSTRACT Objectives Placental insufficiency contributes to many obstetric pathologies, but there is no bedside clinical tool to evaluate placental perfusion. We have developed a method to acquire multiple three‐dimensional (3D) power Doppler (PD) ultrasound (US) volumes of placental vasculature, with infrared camera tracking of the precise spatial ...
A. Xue +5 more
wiley +1 more source
Study on a Micro-fabricated Ultrasonic knife and Its Piezoelectric Driving Power [PDF]
, 2011 超声手术刀是20世纪90年代后在生物医学领域新兴的一种手术器械，而MEMS技术在超声手术刀制造中的引入，又促使其向高精度、微体积、多功能、低成本的方向进一步发展。本文以国家863计划所支持的“基于MEMS技术的微型超声手术刀”项目课题为背景，对其薄片变幅杆刀体进行了理论推导与分析，并构建了其整体等效网络模型，最后完成了其压电驱动电源的设计与实现。论文的主要贡献与具体创新点主要如下： 1．首次对三角型与指数型复合薄片变幅杆进行了理论推导，得出了表征其特性的各种重要函数与方程 ...
武敬
core
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 3, Page 372-383, March 2025.ABSTRACT Objective To assess whether premenopausal women diagnosed with deep or ovarian endometriosis on transvaginal sonography (TVS) were more likely to suffer from dyspareunia and pelvic pain symptoms, and have a lower quality of life, compared to women without sonographically diagnosed deep or ovarian endometriosis.
P. Chaggar +5 more
wiley +1 more source
Research of New MFL Testing Technology Based on the Condition of Variable Excitation [PDF]
, 2016 储罐和管道是石化工业中石油和天然气的主要载体，储罐和管道的腐蚀不可避免的造成石油和燃气的泄漏，并进而引发爆炸等事故。因此，对储罐和管道的安全检测，对于保障人民生命、财产以及防止环境污染等具有重要的意义。漏磁检测技术属于无损检测范畴，是储罐和管道检测中最常用的检测手段之一。内、外表面缺陷的区分问题一直是漏磁检测技术的一个技术难题，本文提出了变励磁条件下的新型漏磁检测技术，可有效检测缺陷并实现内外表面缺陷的区分。 本文首先分析了漏磁检测技术以及无损检测技术的研究背景和现状 ...
李雪松
core
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 3, Page 295-302, March 2025.ABSTRACT Objective Although artificial intelligence (AI) is increasingly being applied to ultrasound imaging in gynecology, efforts to synthesize the available evidence have been inadequate. The aim of this systematic review was to summarize and evaluate the literature on the role of AI applied to ultrasound imaging in benign gynecological disorders ...
F. Moro +8 more
wiley +1 more source
The Research on Neural-fuzzy Controller and it's Application in VVVF System [PDF]
, 2002 针对变频调速系统的控制问题 ,提出了神经模糊控制策略 ,并将其应用到了交流变频调速系统的实验中。结果表明 ,神经模糊控制器不仅具有令人满意的静、动态性能 ,而且具有很强的鲁棒性和自适应性。This paper presents the neural fuzzy controlling algorithm to resolve the problem in VVVF system and applies it in the test for VVVF system.Results of the ...
丁科, 李绍滋, 梁文林
core
Routine 36‐week scan: diagnosis and outcome of abnormal fetal presentation
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 2, Page 154-162, February 2025.ABSTRACT Objectives First, to report the incidence of non‐cephalic presentation at a routine 36‐week ultrasound scan, the uptake and success of external cephalic version (ECV) and the incidence of spontaneous rotation from non‐cephalic to cephalic presentation.
M. Fitiri +5 more
wiley +1 more source
Gaoya dianqi, 2017 运行中局部放电测试是检测GIL设备内部是否存在缺陷的最有效手段之一。文中对GIL设备运行中超声波局部放电测试发现的异常进行了分析。依据超声波局放测试、超声波/地电波/高频电流声电联合诊断测试、现场解体检查及返厂解体检查结果进行了综合分析判断,确定了局放异常产生的原因并提出运行建议。
黄和燕 +5 more
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