Gaoya dianqi高压开关设备的温升试验对保障电力系统安全运行至关重要。针对传统高压开关温升试验耗时长、能耗高和安全隐患等问题，文中提出了基于热时间常数的温升稳定值预测方法以优化试验效率。首先，介绍了热时间常数理论及计算方法，给出了温升曲线方程，提出了可利用最小二乘法拟合温升曲线以获取相关参数。然后，通过对GW12kV户外隔离开关、GW40.5kV户外隔离开关和ZW32-12/630A户外柱上开关进行试验验证，结果表明该方法预测结果偏差在±3K内。最后，提出了预热试验优化策略，文中所选3种开关温升试验时间分别缩短约36 ...
王博 +6 more
doaj
[Simultaneous determination of five common pyrethroid metabolites in urine using liquid-liquid extraction coupled with ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuZhang XM, Meng XJ, Hu Y, Liu XD.
europepmc +1 more source
[Protective effects and underlying mechanisms of bone marrow mesenchymal stem cells-derived apoptotic extracellular vesicles in acute kidney injury]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLin Z, Chen J, Lin T, Liu S, Liu J.
europepmc +1 more source
基于CFD模拟的全户内模块化变电站室内通风散热及气流组织优化设计
Gaoya dianqi全户内模块化110 kV智能变电站因其室内空间有限、电气设备发热集中，在实际运行中暴露出室内平均温度较高、局部温度过高、温湿度控制难度大等问题，不利于电气设备的高效安全运行。因此，文中通过控制进、出风口参数改善室内通风散热和气流组织效果，首先分析了变电站标准化设计与装配式建设中通风散热现状及电气设备发热情况；然后，基于真实情况建立了变电站整体三维物理模型，对温度场分布、气流组织分布等进行仿真模拟。数值模拟结果显示，室内平均温度为48℃，高于110-A2-6设计方案中室内温度设计要求 ...
石慧 +6 more
doaj
[Effect of intraoperative hypothermia on short-term prognosis in neonatal necrotizing enterocolitis]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiRan Q, Wei H, Shi Y, Wang ZL.
europepmc +1 more source
[Noninvasive nanosecond transcranial pulsed electric fields: deep-penetrating, high-field stimulation for suppressing hippocampal amyloid-β and improving cognitive function in an Alzheimer's disease model]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiChen Y, Yao C, Yan F, Xiao P, Lu X.
europepmc +1 more source
[Isolation, purification and immunomodulatory activity of polysaccharide from <i>Lonicera caerulea</i> L. var. <i>edulis</i> Turcz. ex Herder]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoHuang Y +6 more
europepmc +1 more source
[<i>Wenyang Huazhuo Tongluo</i> Formula promotes angiogenesis in systemic sclerosis dermal microvascular endothelial cells by regulating the Sema3A/Nrp1 pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoGuo K +7 more
europepmc +1 more source
[Design and practice of instrumental analysis experiment： determination of borneol and camphor in <i>Chrysanthemum</i> by multiple headspace extraction-gas chromatography- mass spectrometry]. [PDF]
Se PuLi HX +5 more
europepmc +1 more source
[Functional requirements and research advances of antimicrobial hydrogels for combat trauma wound repair]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiWu B, Wei G.
europepmc +1 more source