Results 101 to 110 of about 24,467 (162)

[Meige syndrome with dyspnea as main manifestation: a report of one case and literature review]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Liu T, Xu J, Ye J.
europepmc   +1 more source

基于三相电流变化增量的单相接地故障判断的研究

Gaoya dianqi
为了解决单相接地故障处理存在高阻故障判断盲区的技术难题，对接地故障发生时三相电流变化增量进行研究。从理论分析和10 kV真型模拟试验两方面入手，分析单相接地故障网络，研究接地故障点前后三相电流变化增量的特征，结合10 kV真型模拟试验数据、提出完整判据，创新了一种采用三相电流的稳态变化量来判断单相接地故障方法。该方法通过多种类型10 kV真型单相接地故障试验，证明其能够对单相接地故障准确选相选线和故障定段，并具有精准判断高阻接地故障的技术优势，可普遍适用于中性点不接地、经消弧线圈和小电阻接地系统。
李智玲, 徐肃, 郑岩, 李智博, 张瑞强, 李航, 孙嘉宁   +6 more
doaj  

[Analysis of cochlear reimplantation surgery and factors influencing postoperative auditory and speech function]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Bi Q, Chen Z, Lyu Y, Yang W, Xu X, Li Y, Li Y.   +6 more
europepmc   +1 more source

[Application of domestic single-port robotic surgical system in thyroid cancer]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Ma Q, Zhang S, Zhang L, Liu J, Sun R, Zhou Y, Ma L, Shui C, Cai Y, Li C.   +9 more
europepmc   +1 more source

基于全球专利的中国电网防雷技术竞争力分析 [PDF]

, 2019
邓阿妹, 魏凤
core  

基于改进梯度提升决策树算法的输电线路故障研判技术研究与应用

Dianci bileiqi
输电线路故障精准研判对保障电网安全稳定运行至关重要。针对目前输电线路诊断故障存在的依赖运维人员经验、多源数据协同分析能力不足、故障研判准确率较低等问题，提出基于多源数据融合的故障智能研判策略。首先，整合线路本体数据、气象数据、故障波形数据等五类多源信息，构建包含电气量和非电气量的故障融合分析框架，解决单要素诊断造成结果偏差问题；其次，引入 Focal Loss 函数改进 GBDT 算法，动态调制损失权重强化故障学习能力，解决非雷击子类故障样本偏斜问题，提升非雷击故障识别可靠性；最后，设计了 ...
陶汉涛, 谢迎谱, 谷山强, 王顺, 吴大伟, 涂洁   +5 more
doaj  

[Central nervous system infection mimicking neuropsychiatric systemic lupus erythematosus: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao K, Lu F, Wang Y.
europepmc   +1 more source

[Survey on sleep status and OSA-18 questionnaire among preschool children in Zhongshan City]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Xu C, Fu M, Pan Z, Luo J.
europepmc   +1 more source

[Towards precision diagnosis and treatment: interpretation of the ten highlights of the expert consensus on the diagnosis and treatment of hereditary hyperbilirubinemia (version 2025)]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Hou W, Duan ZP, Zheng SJ.
europepmc   +1 more source

[Resveratrol protects barrier function of mouse brain microvascular endothelial cell monolayers with oxygen/glucose deprivation and PM_2.5 exposure by maintaining mitochondrial dynamics balance]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Qin M, Sun S, Liu J, Gao Y, Wang H, Wang Y, Sun A, Yan J, Wang J, Yu Y.   +9 more
europepmc   +1 more source