Results 121 to 130 of about 22,750 (171)

同步真空断路器投切电容器组装置的精度研究

Gaoya dianqi, 2014
10 kV同步真空断路器的精度主要包括两个方面,一是测量数值精度,另一个是相位角的精度。电力系统采集装置测量精度问题,长期以来很少被关注,导致采集数据与实际值之间存在一定的误差。笔者将介绍一种新型的电容测电压电路,从测量数值精度和相位角精度两个方面总结这种采集系统的误差,并且分析温度变化时这种电压采集系统引起的分合闸角度和功率计算的误差。实际测试表明,该电压采集系统体积小、重量轻、成本低、功耗小并且满足工程要求。
苏宗海, 韩爱芝, 武建文, 刘守明, 张之昊, 张保卫, 史宏伟, 李松涛, 何新华   +8 more
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一种新型中性点有源接地补偿系统的建立与实验

Gaoya dianqi, 2016
针对传统的无源消弧线圈不能补偿配电网故障电流的有功分量和谐波分量,无法保证残流在规定范围之内,容易产生弧光接地过电压等问题,设计了一种基于双逆变器的新型中性点有源接地补偿系统。该系统由测控系统和补偿系统构成。在电网正常时,测控系统通过不对称电压法与恒频注入法综合计算得到接地故障电流的基波无功分量与有功分量;在电网发生单相接地后,检测流过中性点的故障电流,利用快速傅里叶算法提取出谐波分量,然后迅速投入补偿系统进行输出补偿。补偿系统主要由双逆变器构成,分别用于补偿接地故障电流中的基波分量 ...
陈忠仁, 黄健, 何业军
doaj  

[Application of accuracy profile-based evaluation in the development of quantitative methods for urinary phenol detection]. [PDF]

Se Pu
Liu XN, Shen YH, Tang WF, Ao JJ, Liu JX, Zhao L, Yuan LL, Huang X, Zhang QL.   +8 more
europepmc   +1 more source

[Establishment and international comparison of reference methods for glycated hemoglobin]. [PDF]

Se Pu
Wang M, Zhang SL, Zhang R, Song YC, Shi J, Xue QZ, Hu YW.   +6 more
europepmc   +1 more source

[Teaching practice of undergraduate graduation projects in clinical laboratory science integrating liquid chromatography-tandem mass spectrometry and external quality assessment]. [PDF]

Se Pu
Shi J, Wang M, Xue QZ, Zhang SL, Hu YW.
europepmc   +1 more source

[Development of a liquid chromatography-tandem mass spectrometry method for steroid hormone detection during pregnancy and consistency analysis with chemiluminescence immunoassay]. [PDF]

Se Pu
Wu WX, Wu LH, Diao FQ, Luo YW, Gu CM, Luo MY.   +5 more
europepmc   +1 more source

[Determination of 30 homologues of phosphatidylcholines and lysophosphatidylcholines in human serum by liquid chromatography-tandem mass spectrometry and their correlation analysis with coronary artery disease]. [PDF]

Se Pu
Li WY, Liu ZY, Dong J, Yang RY, Li HX, Chen WX, Wang SM.   +6 more
europepmc   +1 more source

[Performance validation and consistency assessment of three liquid chromatography-tandem mass spectrometry methods for detecting fat-soluble vitamins]. [PDF]

Se Pu
Li BC, Li BH, Chen ZY, Li ZY, Yin ML, Lyu X, Xiang ZY, Long QC, Hu M.   +8 more
europepmc   +1 more source

[Efficacy analysis of electrochemical detection of leukocyte esterase based on glucosyl ester in diagnosis of periprosthetic joint infection after knee arthroplasty in rabbits]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Luo N, Chen Q, Zeng T, Zuo H, Niu D, Shen B.   +5 more
europepmc   +1 more source

[<i>Lactobacillus plantarum</i> alleviates lead exposure-induced learning and memory impairment in mice by regulating bile acid metabolism and inhibiting hippocampal NLRP3 expression]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Li L, Yu W, Tan M, Li Y, Liu A, Meng X.
europepmc   +1 more source