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 bileiqi10 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 +6 more
doaj
, 1999 民用单频ＧＰＳ接收机实时定位精度约为１００ｍ，将民用单频ＧＰＳ接收机装载到汽车上进行导航工作，如不用差分等方法，则其实时定位精度也只能为１００ｍ。假设在车上另加测向测距装置，以此为基础 ...
邓幼俊
core
[Gait event-driven dynamic changes in brain-muscle networks and neuromuscular coordination mechanisms]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLiu X, Guo A, Liang T, Liu X, Qin L.
europepmc +1 more source
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 +5 more
doaj
[Molecular characteristics for poor prognosis related renal cell carcinoma with lymph metastases]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanShu F +10 more
europepmc +1 more source
[How I treat pediatric febrile infection-related epilepsy syndrome]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiDeng XL, Peng J.
europepmc +1 more source
[Application of support vector machine in identifying neuromodulation states in patients with zoster-associated pain]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanChen L, Wu Q, Zhou H, Liu S.
europepmc +1 more source
[Visual prior-guided masked image modeling enhances chest X-ray diagnostic efficacy]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoWang 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 BaoChen J +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 BanZhong H +6 more
europepmc +1 more source