Results 41 to 50 of about 58 (58)

基于小波包分解的XLPE配电电缆局部放电波形特征提取与识别

Gaoya dianqi, 2013
XLPE中压电缆局部放电（partial discharge）带电检测获得的信号可能源于电缆本体、电缆终端头,也可能来自于与之连接的开关柜中的电晕放电或表面放电等等。由于不同来源的PD信号,对设备的危害不同,其判断标准也有所不同,故有必要对PD信号来源进行识别。笔者利用小波包分解技术对试验获得的大量PD波形数据进行去噪和特征提取。使用PD信号在不同尺度下的能量谱、Shannon熵、对数能量熵以及1.5阶标准熵组成4组特征向量;将提取出的特征向量分别作为BP神经网络分类器的输入,对PD信号进行识别 ...
罗新, 牛海清, 胡日亮, 刘访, 吴炬卓   +4 more
doaj  

["Leverage pry-off method" for effective prevention of thermal injury during microwave ablation of benign thyroid nodules]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao, 2023
Wu F, Wu Q, Xu W, Wu Z, Liu L, Zhou L.
europepmc   +1 more source

[Development of on-line lateral stiffness measurement system for anterior cruciate ligament and its influence on anterior cruciate ligament reconstruction]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2021
Cui Z, Chen Z, Huang S, Yang H, Lei J, Zhu D.   +5 more
europepmc   +1 more source

[Effectiveness analysis of closed or limited open reduction and intramedullary nail fixation in treatment of Seinsheimer type Ⅴ subtrochanteric fracture]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2020
Yao X, Wu L, Li J, Huang W, Duan X, Gu Z, Wang Y.   +6 more
europepmc   +1 more source

330kV全封闭电缆终端头的试验研究

Gaoya dianqi, 1985
本文介绍了330kV全封闭电缆终头端的设计、工艺、试验和相应的研究工作。终端头所用的环氧树脂外套长1130mm外径300mm。高压屏蔽帽外径200mm,接地外壳内径630mm。工作气压2.5kgf/cm2。主绝缘采用预制电容锥,安装简便。在环氧树脂和密封结构件分别进行了较为全面的性能试验的基础上,设计,制造了样品。该样品通过了全部型式试验,并进行了部分研究性裕度试验。试验结果表明,所设计的全封闭终端头性能可靠,部分性能还达到500kV级终端头的水平,说明该设计结构、工艺、装配都达到了比较先进的水平。
doaj  

[Progress on reconstruction of proximal femur in the hemiarthroplasty for intertrochanteric fracture with distal fixated long stem]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2020
Zhao Z, Chen J, Li X, Liu L, Wei W, Wang G.   +5 more
europepmc   +1 more source

[State-of-the-art in peripheral nerve injury diagnosis and therapy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Sun J, Chen L.
europepmc   +1 more source

[Thoughts and Prospects on Precision Control and Intelligent Positioning Robotic Systems Applied in Nasojejunal Feeding Tube Placement]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Qiu Y, Hong R, Xiang G, Hong D, Zhang Y, Li K, Qian H, Dian S, Li K, Pu W.   +9 more
europepmc   +1 more source

[Identification and Underlying Mechanisms of Immune Cell- and Senescence-Related Biomarkers in Atrial Fibrillation]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Huang W, Liu E, Fu H.
europepmc   +1 more source

[Research progress on treatment of unstable intertrochanteric fractures in elderly patients with bone cement type femoral head replacement]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Ma J, Lu B, Ma X.
europepmc   +1 more source