Results 121 to 130 of about 6,040 (165)

12kV开关柜局部放电超声波信号特征研究

Gaoya dianqi
为识别区分12kV开关柜常见局部放电故障类型，依据开关柜实际运行故障设计了尖端、悬浮、沿面与气隙四种局部放电缺陷模型，搭建了真型开关柜局放实验平台。模拟开关柜局部放电过程并采集超声波（Acoustic Emission，AE）信号，利用快速傅立叶变换分析了AE信号频域参数、相位分布、上升沿时间、下降沿时间、波形形状特征，对各类特征量进行了对比研究。结果表明：四种缺陷产生的AE信号副频段及放电相位特征差异明显，不同缺陷产生的AE信号形状各异，下降沿与上升沿时间比值的明显差异可作为局放类型判别依据 ...
杨龙山, 曾潮旭, 杨森, 丁晨, 蔡乐辉, 陈天翔   +5 more
doaj  

[Visual prior-guided masked image modeling enhances chest X-ray diagnostic efficacy]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang J, Zhang Y.
europepmc   +1 more source

[Dual role of tea consumption in gastrointestinal disease risks: analysis using a risk prediction model integrating interpretable machine learning and large language model]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen J, Chen Z, Lin Z, Fang M, Shen C, Xu Q, Zhang X, Lu L.   +7 more
europepmc   +1 more source

[Next-Generation Sequencing-Based Detection of Gene Mutations and Its Association With Clinicopathological Features in Gastric Cancer]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhong H, Liu T, Bai L, Li J, Song M, Zhou J, Chen H.   +6 more
europepmc   +1 more source

[Lung nodule segmentation method based on multiscale feature interaction and coordinate information]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Xu Q, Zhu H, Wang Y, Liu W.
europepmc   +1 more source

[Predicting epileptic seizures based on a multi-convolution fusion network]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Shen X, Piao Y, Yang H, Zhao H.
europepmc   +1 more source

[Early Alzheimer's disease recognition via multimodal hand movement quality assessment]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yang G, Zhu C, Wu J, Luo K, Chen X, Lin J.   +5 more
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 Bao
Lu X, Chen H, Wu Q, Wen Y, Liu G, Chen C.   +5 more
europepmc   +1 more source

Numerical Investigation of the Instability and Evolution Characteristics of Thermal Convection in Liquid Layer

  晶体生长过程中热对流的流动模式及其不稳定性极大地影响热质输运过程， 进而直接影响生长晶体的质量，成为晶体生长过程调控的关键因素。因此对热对流的深入研究具有重要价值与意义。当前随着人类深空探测活动的开展，对晶体生长的研究也从地面常重力环境扩展到空间微/低重力环境。地面晶体生长过程中热对流以浮力对流为主导；空间浮区法半导体/金属晶体生长实验结果表明微重力环境下具有液-气或液-液界面热对流体系中界面张力梯度驱动对流取代浮力对流成为主导；而对于低重力环境，例如月球基地，具有液-气或液 ...
郭子漪
core  

[Development of a surface electromyography index system for orofacial muscles and validation of a discriminant model in unilateral molar occlusal interference]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li W, Shen Y, Yang Y, Shan S, Gao Z, Wen A, Shang X, Tian Y, Guo S, Wang Y, Wang Y, Zhao Y.   +11 more
europepmc   +1 more source