Results 61 to 70 of about 291 (115)

配电线路电容与PT电感阻抗比对铁磁谐振电压电流特性的影响研究

Dianci bileiqi, 2019
随着电磁式电压互感器（PT）励磁特性的提高,PT产生铁磁谐振的条件、区域等特征发生了变化,这导致电网原有针对铁磁谐振采用的消谐措施有效性也随之降低。基于云南电网某变电站典型PT的铁磁谐振,应用PSCAD/EMTDC软件建立了仿真计算模型,研究线路系统电容电流和PT励磁特性对铁磁谐振的影响。同时,基于建立了10 kV铁磁谐振模拟试验平台,进行了几种典型PT的铁磁谐振模拟试验,以验证PT仿真计算模型。试验和计算结果表明:PT的铁磁谐振模拟试验和仿真计算波形具有良好的一致性; 10 kV和35 ...
张志磊, 郭涛, 田石金, 刘学忠, 刘红文   +4 more
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[Magnetic fluorinated covalent triazine frameworks for efficient extraction of perfluorinated compounds]. [PDF]

Se Pu
Zhang WM, Liu GC, Fang M, Guo JL, Zhang L.   +4 more
europepmc   +1 more source

[The cochlear extracellular matrix gene mutations and hearing loss]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Wang Q, Yuan Y, Han W.
europepmc   +1 more source

[Research progress in repair of post-epicanthoplasty deformity]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ren B, Chen W.
europepmc   +1 more source

[Simultaneous determination of seven quaternary ammonium compounds in frozen food by ultra performance liquid chromatography-tandem mass spectrometry combined with modified QuEChERS method]. [PDF]

Se Pu, 2023
Liu BL, Zhao ZW, Zhan ZY, Dai YY, Ding G, Xie J, Xu XC, Kong HT.   +7 more
europepmc   +1 more source

[Expert Consensus on Shared Decision-making in the Diagnosis and Treatment 
of Ground-glass Opacity-featured Lung Adenocarcinoma]. [PDF]

Zhongguo Fei Ai Za Zhi
Zhao X, Cai J, Zhao D, Chen C, Compilation Committee of the Expert Consensus on Shared Decision-making in the Diagnosis and Treatment of Ground-glass Opacity-featured Lung Adenocarcinoma.   +4 more
europepmc   +1 more source

[A portable steady-state visual evoked potential brain-computer interface system for smart healthcare]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhu Y, Ji Z, Li S, Wang H, Fu Y, Wang H.
europepmc   +1 more source

几起典型电力系统谐振案例分析

Gaoya dianqi
文中详细分析了几起电力系统谐振典型案例，总结了系统谐振产生的条件，以及在系统谐振期间反映在GIS设备上产生的多种异常特征，并分析了如何通过观察这些异常现象迅速做出定性判断，从而采取正确有效手段消除隐患，避免设备损坏，保证系统安全运行。同时文中对后续采取的抑制谐振措施也进行了详细的论述说明，为提高电力系统稳定运行和避免谐振故障提供参考。
刘根根, 李英, 张向阳, 常越, 孟珍政, 唐华超, 李晓猛   +6 more
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[Role of traditional Chinese medicine concepts in the prevention of childhood caries]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Sun J, He J, Chen Q, Luo W.
europepmc   +1 more source

运行中测量金属氧化物避雷器阻性泄漏电流的新方法

Dianci bileiqi, 1992
对于金属氧化物避雷器运行情况的监视主要靠测量泄漏电流.常用的方法有测量全电流、直流测量阻性电流及泄漏电流的谐波分析.本文提出对泄漏电流进行谐波分析的新方法,采用外偿法把系统电压的谐波产生的三次谐波电流消除,以得到仅由避雷器产生的三次电流谐波.然后再确定阻性电流的三次谐波与总的阻性电流的关系.采用电场测量法间接求得容性三次谐波电流.电位及电流信号输入微处理机处理和显示各种参数,与直流测量法相比,其误差在20～25%之间.
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