Results 11 to 20 of about 5,976 (163)
Near-field microwave imaging and quantitative characterization of defects in PE pipeline [PDF]
, 2023 In order to effectively detect internal defects in polyethylene (PE) pipeline, microwave non-destructive testing technology was used to detect and quantify defects in PE pipelines.A clutter suppression imaging enhancement method based on principal ...
Mengmeng ZHANG, Mingshi LUO, Yang FANG
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Policy &Internet, Volume 15, Issue 2, Page 204-222, June 2023., 2023 Abstract One central measure set out in the regulation of digital political advertising (DPA) concentrates on transparency disclaimers to make users aware that the respective content was bought and targeted at them with a specific intention by an advertiser.
Pablo Jost +4 more
wiley +1 more source
Experimental study on dynamic mechanical behavior of frozen sandstone with different saturations [PDF]
, 2023 Water content is one of the critical factors affecting frost damage to rock masses in alpine regions. A dynamic disturbance load further complicates the issue.
Hai PU, Junce XU, Ziheng SHA
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European Policy Analysis, Volume 8, Issue 2, Page 136-159, Spring 2022., 2022 Abstract This paper provides a critical assessment of the Sustainable Governance Indicators (SGI) and compares it with other prominent indices that address specific components of governance: V‐Dem, WGI, and BTI. We offer a comparative assessment of content validity of these governance measures, their data generation processes, and their convergent ...
Aurel Croissant, Lars Pelke
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Dianci bileiqi, 2021 变压器套管具有内绝缘和外绝缘双重绝缘结构,在运行过程中要承受高电压和大电流的作用。由套管内部缺陷产生的局部放电是引发变压器事故的主要因素,开展变压器套管的局部放电检测研究具有重要意义。笔者制作了5种含典型缺陷的变压器套管样品,在加压过程中,同时采用脉冲电流法、特高频法和超声波法检测套管内部缺陷引起的局部放电。试验结果表明,下瓷套内壁沿面放电缺陷、电容芯内绝缘纸褶皱且未经干燥缺陷和底部载流连接不可靠缺陷样品在试验过程中能产生特征明显的局部放电 ...
胡长猛 +6 more
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Journal of Advanced Nursing, Volume 76, Issue 12, Page 3528-3536, December 2020., 2020 Abstract Aim To explore experiences of peer support among parents of children with congenital heart defects. Design A study analysing written responses to open‐ended questions about peer support, collected via an online survey distributed in Sweden. Methods Respondents were recruited during 3 months in 2018 by means of convenience sampling, through ads
Tommy Carlsson +2 more
wiley +1 more source
Research on safety methods of airborne embedded software [PDF]
, 2015 By analyzed the process of development and running of airborne software with the standards of airworthiness and information security,the factors and threats related with airborne software safety were presented,and the security protected mechanisms based ...
Peng GUO, Ya-di ZHANG, Ya-hui LI
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Gaoya dianqi, 2020 金属尖刺缺陷作为GIS内部常见的绝缘缺陷之一,严重威胁GIS的安全稳定运行。文中基于特高频局部放电检测方法研究了GIS内部导杆和外壳上金属尖刺缺陷的局部放电特性。在导杆上设计了长度为3.5、6、12 mm的尖端缺陷,在外壳上设计了长度为12 mm的尖端缺陷;通过逐步升压法对不同部位、不同尺寸缺陷下的特高频局部放电信号进行了测量;结合局部放电信号PRPD谱图对不同部位、不同尺寸下的局部放电特性进行了分析。试验结果表明,GIS内部的金属尖端缺陷不同电压下的放电呈现不同的特征,放电首先出现在交流电压负半周 ...
郝曙光 +6 more
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ESPI nondestructive testing for coating interface failure [PDF]
, 2016 A detection platform of coating failure processes was designed and constructed on the basis of laser electronic speckle pattern interferometry(ESPI).
FENG Hai-xiang +4 more
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Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
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