Results 81 to 90 of about 273 (101)

盘形悬式绝缘子长期电晕作用下的研究

open access: yesDianci bileiqi, 1990
众所周知,在电压约20kV时,干而清洁的绝缘子上开始电离过程(电晕放电,玻璃表面放电),其强度随电压升高而提高。担心这个过程会导致玻璃件加速老化(破坏或丧失绝缘性能)、绝缘子金具腐蚀,使其可靠性变差。列出了在40及46kV电压下单片ПС400—A、ПС300—K、ПСК210—A、ПСС210型悬式绝缘子的长期试验结果 ...
doaj  

[Advances in the Treatment of Multiple Primary Lung Cancer]. [PDF]

open access: yesZhongguo Fei Ai Za Zhi
Xiao Y   +5 more
europepmc   +1 more source

复杂环境下玻璃绝缘子自爆的实时检测方法

open access: yesDianci bileiqi
针对无人机巡检电力玻璃绝缘子过程中,无人机的计算能力和存储资源有限,且在黑暗、光照、噪声干扰、特殊天气等复杂环境下拍摄的玻璃绝缘子自爆缺陷图片难以检测的问题。提出一种适用于复杂环境下玻璃绝缘子自爆的实时检测方法。该方法以具有轻量化特点的YOLOX-s目标检测模型为基础。首先,采用多阶段迁移学习策略提升模型整体性能。其次,通过新增一层浅层特征进行特征融合,使得融合后特征的位置信息更加丰富,更利于自爆缺陷小目标的定位。同时利用Focal Loss专注困难样本学习,提高模型在复杂环境下的鲁棒性。最后 ...
冯世凯, 陈千
doaj  

[Dynamic inflammatory response in a critically ill COVID-19 patient treated with corticosteroids]. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban, 2020
Zhagn S   +7 more
europepmc   +1 more source

[Mutational Signatures Analysis of Micropapillary Components and Exploration of ZNF469 Gene in Early-stage Lung Adenocarcinoma with Ground-glass Opacities]. [PDF]

open access: yesZhongguo Fei Ai Za Zhi
Xu Y   +19 more
europepmc   +1 more source

Home - About - Disclaimer - Privacy