Results 11 to 20 of about 30 (27)
Gaoya dianqi输电电缆线路运行电流较大，电缆支架涡流损耗和温升的问题被广泛关注，急需寻找一种损耗小、温升低、经济性能良好的支架材料。文中采用多物理场耦合的有限元分步仿真计算方法对220 kV电缆线路的钢、不锈钢和新型玄武岩复合材料支架的涡流损耗和温升进行计算。首先在频域下计算涡流损耗，之后再以涡流损耗作为热源，在瞬态下进行电磁场—温度场—流体场三场耦合计算，从而计算出支架温度分布。该方法在保证计算精度的前提下极大降低了计算的复杂度。计算结果表明：钢支架涡流损耗远大于不锈钢支架和玄武岩支架的涡流损耗。电缆电流为1 ...
周秀 +7 more
doaj
[Design and implementation of Internet of Things for emergency medical devices based on cloud-edge-device architecture]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Fan Y +7 more
europepmc +1 more source
[Application of multimodal combined surgical strategy in children with intractable laryngeal airway obstruction]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2022 Cheng C, Zhong J, Qiu S, Yang L, Liu D.
europepmc +1 more source
[Development of a portable micro-liquid chromatograph]. [PDF]
Se Pu, 2021 Fu Q, Yang L, Wang Q.
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Gaoya dianqi随着同隧道并行电缆数目增加，电缆交叉互联段分段位置相同导致的零序护层电流超标问题愈发严重。根据电磁感应基本原理，将分段长度相同但分段位置不同的多回并行电缆进行虚拟分段，编程计算分段位置不同并行电缆的护层电流。研究表明：同侧支架并行电缆分段位置不同对电缆护层电流影响远大于异侧支架并行电缆分段位置不同产生的影响；大品字形回路电缆分段位置不同对护层电流影响大于小品字形回路电缆；对于同支架同段长三回电缆典型敷设方式，三回电缆分段位置相互错开时护层电流最小，且中间层电缆受上下两回电缆负荷电流影响较大 ...
张程华 +5 more
doaj
[Development of a flexible embedded neurostimulator for animal robots]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023 Su Z +7 more
europepmc +1 more source
[Progress in the surgical treatment of the patellar fracture]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2021 Li G, Liu P.
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Gaoya dianqi城市的配电网中电缆占比越来越大，与传统的架空线组成特殊的架空线—电缆混联线路，导致系统的对地电容发生变化，极易与系统中重要的测量保护元件电压互感器的非线性电感相匹配，从而引起系统中的铁磁谐振，轻则电压互感器熔断器烧坏，重则电压互感器发生爆炸，严重威胁到操作员的安全。基于PSCAD建立由架空线—电缆组成的10 kV混联线路仿真模型，选用可以模拟饱和特性的UMEC模型搭建电磁式电压互感器，并对其设置不同的饱和点电压。观测在线路上不对称合闸操作产生的高频暂态电压的激发下，电压互感器出现的铁磁谐振现象 ...
陈浩宇 +3 more
doaj
[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 +6 more
europepmc +1 more source
[An radio frequency coil design for rat spinal magnetic resonance imaging at 9.4 T]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2019 Xu Y, Yang H, Zhong K.
europepmc +1 more source