Gaoya dianqi热态气体的临界击穿场强是评估高压断路器弧后电击穿特性的基础数据，文中研究了C5F10O/CO2混合气体在C5F10O混合比例k=0~10%、压强0.1~2.0 MPa、温度300~4 000 K范围内的临界击穿场强。基于质量作用定律数学模型，得到不同温度下混合气体的平衡组分，采用两项近似方法求解玻尔兹曼方程，分析混合气体的电子能量分布函数、折合电离和吸附系数，获得混合气体的临界折合击穿场强和临界击穿场强。结果表明：0.6 MPa下，温度低于3 000 K时，随着温度降低，k=0~10 ...
崔兆轩, 林莘, 徐建源, 李磊
doaj
基于Boltzmann方程对C3F8/CF3I/CO2三元环保型混合气体的绝缘性能研究
Gaoya dianqi为研究一种新型SF6替代环保绝缘气体介质，采用密度泛函理论（DFT）从微观结构层面上深入地分析C3F8作为一种SF6替代环保绝缘气体的可行性，利用两项近似的Boltzmann方程对300 K下C3F8/CF3I/CO2三元环保混合绝缘气体介质的绝缘特性进行了分析，计算三元环保混合气体的电子能量分布函数、电子群参数和协同效应系数等多种微观参数，分析了这些参数随C3F8混合气体比例的变化情况，并与同比例下的c-C4F8/CF3I/CO2三元混合气体的微观参数进行了对比和分析。在约化电场强度E/N低于418 ...
钟蕊霜 +4 more
doaj
Gaoya dianqi针对绝缘子图像缺陷尺寸小、背景干扰因素多、难易样本不平衡等问题，提出了一种多尺度融合的YOLOv7（MSF-YOLOv7）算法，并将其应用于输电线路绝缘子的缺陷检测。首先，通过多尺度卷积块注意力模块（multi scale-convolution block attention module，MS-CBAM），深度聚合带有丰富语义信息的特征图，提升网络对不同尺度目标的检测性能；其次，在主干网络利用新开发的全局空间金字塔池化（global spatial pyramid pooling-fast ...
孙虹 +5 more
doaj
[Development of a machine learning-based ionization efficiency prediction model for per- and polyfluoroalkyl substances and its application in semi-quantitative analysis]. [PDF]
Se PuSun SZ +6 more
europepmc +1 more source
[A time-frequency transform and Riemannian manifold-based domain adaptation method for motor imagery in brain source space]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiQi Q, Li M.
europepmc +1 more source
[Evaluation of an interpretable 12-lead ECG automatic diagnosis model based on deep feature fusion]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLu X +5 more
europepmc +1 more source
[Research progress on the application of molecularly imprinted nanozymes in the field of biosensing]. [PDF]
Se PuZhang X, Liu S, Pan J.
europepmc +1 more source
[Deep transcranial magnetic stimulation coil design and multi-objective slime mould algorithm]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiXiong H, Zhu J, Liu J.
europepmc +1 more source
[Efficient separation of gossypol from cotton kernels with copper mediated magnetic molecularly imprinted polymer]. [PDF]
Se PuYang SL +5 more
europepmc +1 more source