Dianci bileiqi针对不对称谐振接地配电网传统故障保护启动方式感知过渡电阻的能力薄弱以及故障选线困难问题，提出了一种计及不对称度的单相接地故障保护复合启动及选线方法。首先，利用零序电压变化量构造保护预启动判据，发现将其整定为3%的相电压时，能准确感知高阻接地故障，但易受配电网运行方式改变的影响；其次，在对谐振接地配电网正常和故障运行状态线路零序电流分析发现，健全线路的线路零序不平衡电流差为0而故障线路零序不平衡电流差为故障相电压与过渡电阻的比值，根据这一显著差异进而得到故障保护复合启动及选线判据 ...
王俊, 肖辉, 陈湘元, 吴永孝
doaj
[Research progress in the application of molecular imprinting technology in catalysis]. [PDF]
Se PuYe WM +5 more
europepmc +1 more source
人骨髓间充质干细胞成骨分化早期相关的长链非编码RNA的初步研究
Zhongshan Daxue xuebao. Yixue kexue ban, 2016 摘 要:【目的】 筛选与人骨髓间充质干细胞(hMSC)成骨分化早期相关的长链非编码RNA(lncRNA),分析其对于hMSC成骨分化早期的影响?【方法】 将成骨诱导分化7 d前后的hMSC作为研究对象,利用Agilent lncRNA芯片技术筛选出成骨诱导分化前后表达量具有2倍差异的lncRNA,选取其中1条表达量差异较大的lncRNA利用UCSC Genome Browser分析此lncRNA邻近蛋白编码基因?【结果】 hMSC经过成骨分化诱导7 d后具有明显成骨细胞特征;Agilent ...
doaj
[Identification and Underlying Mechanisms of Immune Cell- and Senescence-Related Biomarkers in Atrial Fibrillation]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanHuang W, Liu E, Fu H.
europepmc +1 more source
[Discrimination of macrotrabecular-massive hepatocellular carcinoma based on fusion of multi-phase contrast-enhanced computed tomography radiomics features]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhang Z +7 more
europepmc +1 more source
Gaoya dianqi文中阐述了在完成海上柔性直流系统送电过程中，防止变压器励磁涌流造成送电失败而采用选相合闸措施。为保证选相操作顺利实施，通过变压器励磁涌流仿真计算，明确变压器涌流在最大允许限值时，断路器允许的动作时间最大偏离值，通过试验验证，确认影响断路器合闸操作时间分散性因素和范围。根据以上计算和验证结果，根据断路器空置时间分散性试验，选用多次关合时间中间值作为最终参数，减小了断路器机械及电气分散性的影响，使得实际运行考核中，变压器励磁涌流得到有效抑制，可为后续海上柔性直流选相合闸装置、断路器动作特性 ...
李英 +4 more
doaj
[Determination of five photoinitiators including 2，4，6-trimethylbenzoyl diphenyl phosphine oxide in gel nail polish by high performance liquid chromatography]. [PDF]
Se PuGong X, Sun J, Li XX, Feng YL.
europepmc +1 more source
[Research progress on the pretreatment and analysis of prohibited components of glucocorticoids in cosmetics]. [PDF]
Se PuLiu L, Xiao XH, Fang JH, Li GK.
europepmc +1 more source
[Simultaneous determination of vitamins K<sub>1</sub> and K<sub>2</sub> in cosmetics by QuEChERS-high performance liquid chromatography and verification by high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuSun Q, Chen CX.
europepmc +1 more source
[Controlled synthesis of high-capacity bisphenol A molecularly imprinted polymer and its application to the detection of environmental water samples]. [PDF]
Se PuCheng Y, Lin YL, Tian MM.
europepmc +1 more source