Results 71 to 80 of about 35,001 (119)

[Research progress and clinical application of allergen nasal provocation test]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023
Han J, Lu M, Cheng L.
europepmc   +1 more source

[Analysis of Salivary Microbiota Characteristics in Patients With Pulmonary Nodules: A Prospective Nonrandomized Concurrent Controlled Trial]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban, 2023
Ren Y, Ma Q, Li F, Zeng X, Tan S, Fu X, Zheng C, You F, Li X.   +8 more
europepmc   +1 more source

特高压人工交流污秽试验电源关键参数的选型计算分析

Gaoya dianqi, 2015
特高压交流污秽试验电源是进行特高压及以下电压等级被试品人工交流污秽和覆冰试验的主要设备,其参数选择是否正确直接关系到试验结果的可靠性。笔者提出了交流污秽试验电源关键参数的计算方法,并分析了各关键参数对特高压及以下电压等级被试品进行交流污秽试验的影响。计算结果表明:对不同电压等级的被试品进行交流污秽试验时,为获得理想的试验结果,应选用不同阻值的保护电阻;进行特高压被试品的交流污秽试验时,污秽试验变压器的抗短路能力至少为其额定电流的9倍,进行超高压及以下电压等级的被试品的交流污秽试验时 ...
孙利朋, 李志愿, 蒋正龙, 李勤朴, 方针   +4 more
doaj  

[Evaluation of subjective scale in allergen nasal provocation test]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023
Shen L, Hu X, Zeng L, Liu Y, Wu Y, Yi H, Luo Q, Ye J.   +7 more
europepmc   +1 more source

分级绝缘电压互感器倍频感应耐压试验的分析

Gaoya dianqi, 2007
为检查分级绝缘电压互感器的绝缘缺陷,需要对其进行倍频感应耐压试验。笔者提出了倍频感应耐压试验时试验电压的几种测量方法,对耐压试验中电压互感器的容升电压的产生原因及其对试验的影响进行了分析,对耐压试验的电压持续时间进行了说明,指出耐压试验前后空载试验结果的对比是判断被试电压互感器是否合格的依据。
董国震
doaj  

Quality evaluation of the literature on clinical randomized controlled trials of traditional Chinese medicine for treatment of gastric precancerous lesions in the past 20 years. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban, 2023
Zhang Q, Wu D, Wang Y, Guo F, Yang S, Wang P.   +5 more
europepmc   +1 more source

Garabi Ⅱ HVDC晶闸管阀的运行试验

Gaoya dianqi, 2003
用合成试验回路对GarabiⅡHVDC晶闸管阀进行了运行试验。这个由传统的背靠背直接试验回路和电压振荡回路组成的合成试验回路能够产生晶闸管阀在实际运行中承受的电流和电压。该试验回路参数的选取接近系统的实际参数。从合成试验回路所获得的样品试验结果和以前从传统的背靠背试验回路获得试验结果是相同的。然而,这种合成试验回路更具有技术上的优势,并且在经济上也优于背靠背直接试验回路。
盛宝良
doaj  

[A Randomized Controlled Clinical Trial of Acupuncture at the Sphenopalatine Ganglion for the Treatment of Allergic Rhinitis]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Huang J, Zhong B, Wang F, Zhang Y, Qiu Y, Wei X, Deng J, Song H.   +7 more
europepmc   +1 more source

[Chinese introduction to the Preferred Reporting Items for Randomized Trials in Endodontics 2020 checklist]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Pang X, Liu C, Cui X, Liu J, Wang L, Pan J.   +5 more
europepmc   +1 more source

[Diagnostic value of RART and LDT in determining the affected semicircular canal for the HSC-BPPV]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Yun Y, Chang H, Yang P, Xing J.
europepmc   +1 more source