Results 71 to 80 of about 2,147 (117)

基于实测和Matlab仿真波形比较的10 kV配电网单相接地故障暂稳态特征信息融合选线方法研究

Dianci bileiqi
10 kV配电网单相接地故障稳态选线方法受故障电阻、谐振接地电网补偿的影响较大，且信噪比较低；而暂态选线方法虽然信噪比较高，且受故障电阻、谐振接地电网补偿的影响较小，但具有依赖特征频带选取以及信号持续时间短，信号与暂态干扰信号产生混叠严重的特点。为了进一步提高选线成功率，本研究探索了一种融合暂稳态特征信息的选线方法，通过在Matlab仿真平台中搭建10 kV配电网系统的高精度pi模型网络，分析故障信号的暂稳态特征，在三相不平衡、支路开合闸等干扰条件下 ...
刘成英, 祁升龙, 芦翔, 王宏宇, 刘海涛, 李瑞祥, 杨兰均   +6 more
doaj  

[Clinical application of dynamic visual acuity testing in patients with vestibular migraine]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Shi H, Li Y, Zhang W, Yang J, Wu J, Li Y, Zhou L, Li Y, Chen G.   +8 more
europepmc   +1 more source

[Clinical characteristics of pediatric patients with acute lymphoblastic leukemia admitted to the pediatric intensive care unit]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wu FF, Mao JY, Wan WQ, Wen C.
europepmc   +1 more source

[Research progress on olfactory function and rehabilitation after total laryngectomy]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zhu X, Qian X, Gu Y, Dou X, Hou J, Wei H.   +5 more
europepmc   +1 more source

[Research progress in diagnosis and treatment of non-tumorous salivary gland diseases]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Cong X, Su J, Wu L, Ding C, Li W, Yu G.
europepmc   +1 more source

谐振接地配电网单相接地故障保护复合启动及选线方法

Dianci bileiqi
针对不对称谐振接地配电网传统故障保护启动方式感知过渡电阻的能力薄弱以及故障选线困难问题，提出了一种计及不对称度的单相接地故障保护复合启动及选线方法。首先，利用零序电压变化量构造保护预启动判据，发现将其整定为3%的相电压时，能准确感知高阻接地故障，但易受配电网运行方式改变的影响；其次，在对谐振接地配电网正常和故障运行状态线路零序电流分析发现，健全线路的线路零序不平衡电流差为0而故障线路零序不平衡电流差为故障相电压与过渡电阻的比值，根据这一显著差异进而得到故障保护复合启动及选线判据 ...
王俊, 肖辉, 陈湘元, 吴永孝
doaj  

[Trends in burden of pelvic fractures from 1990 to 2023 and long short-term memory-based insights into future projections]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Fan W, Yin Y, Tian C, Zhou J, Xie T, Shi L, Liu G, Rui Y.   +7 more
europepmc   +1 more source

[Assistance and breakthrough of digitalization and intelligent digitalization in implant restoration of edentulous jaws]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Sa Y, Cai Y, Sun Y, Zhao M, Xia S.
europepmc   +1 more source

[Exploration of the "Hainan Model" in the construction of specialized wound repair discipline]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Cheng SW.
europepmc   +1 more source

[Medical treatment standards for emergency trauma wounded (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source