Dianci bileiqi我国城市中压配网电容电流骤增，消弧线圈补偿能力不足导致接地故障电弧难以自熄问题突出；且城市复杂的线路走廊环境及配电网实际运行状态等因素导致单相接地故障特征不明显，易发生误选、漏选问题。文中对小电流接地系统单相接地故障快速熄弧和选线技术进行综述，首先对其暂态过程中和稳态下的故障点电流、中性点电压以及馈线零序电流等关键物理量进行理论推导，分析了接地电弧特性及数学模型。然后，阐述了常用熄弧装置的基本结构和工作原理，并针对无源电流型熄弧装置电容电流监测的准确性、消弧线圈调节的精度和时效性问题 ...
李景丽 +5 more
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Gaoya dianqi, 1990 金属封团式SF6组合电器（GIS）的断路器、隔离开关、母线的连接部分,都在密封的罐体中。由于在运行过程中的振动以及接触面被膜等影响下出现接触不良,往往酝酿成温度升高而引起绝缘破坏事故。目前,因为接触不良,已成了GIS经常发生事故的原因之一。为了对接触部位进行诊断,过去用测量接触电阻、温度上升情况等办法,但是,前者正在运行过程中不能测量,后者在影响速度及定量方面也不尽完善。 如果发生接触不良,一般的发展过程是这样的:处于正常运行状态的设备,由于受到地震,机械振动等外部力的影响,在接触表面形成隔膜 ...
尹新芳
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[Diffusion cycle-consistent generative adversarial networks for pelvic active bone marrow segmentation]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoZhuo L +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 BaoLu X +5 more
europepmc +1 more source
[Limb reconstruction over four decades: the seamless path from technical integration to disciplinary ecology]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhu Y.
europepmc +1 more source
[Image classification of osteoarthritis based on improved shifted windows transformer and graph convolutional networks]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiJiang L, Cao H, Ma Z.
europepmc +1 more source
[A head direction cell model based on a spiking neural network with landmark-free calibration]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiYu N, Huang J, Lin K, Zhang Z.
europepmc +1 more source
[Localizing target for transcranial electrical stimulation in epilepsy patients combining scalp electroencephalogram and neural computational model]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLiu Y, Li C, Han Y.
europepmc +1 more source
[Current status and future directions of stability reconstruction following spinal tumor resection]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhou J, Dong J.
europepmc +1 more source
Jianzhu Gangjiegou Jinzhan为解决刚接柱脚自复位装配式钢框架结构在中震或大震下底层柱可能发生较大的塑性变形的问题，设计一种半刚接柱脚自复位装配式钢框架结构。对其子结构进行拟动力试验，对比框架在Taft地震波、LOS000地震波和El-Centro地震波输入及不同等级地震下的节点开口、耗能能力、刚度退化、预应力损失和应变变化。试验结果表明，钢框架在大震作用下具有良好的自复位功能和耗能能力。钢绞线平均预应力损失最多仅为1.58%，说明施加预应力的方法是可靠的。钢框架柱脚能够始终保持弹性状态，因此震后仅需修复钢梁，大大降低了修复成本。
张艳霞, 沈森, 李杨龙, 赵微
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