Results 81 to 90 of about 978 (116)

动车组避雷器在线故障预警方法研究

Gaoya dianqi
动车组避雷器能够有效预防车内高压设备免受雷电大电流冲击，从而保护动车组安全稳定运行，然而避雷器的故障排查方法多依赖于传统的人工检修，不仅人工成本高，而且检修不及时，极易导致避雷器“带病”运行，造成动车组高压设备稳定运行存在安全隐患。针对避雷器内部受潮、阀片老化、表面污秽积累三种故障类型，本文使用阈值比较法判定避雷器的运行状态，同时针对阈值比较法在判定内部受潮和阀片老化两种主要的故障类型时，易受到网压不稳定和环境温度湿度影响从而导致误报率增加的情况 ...
朱文龙, 李强, 徐海龙
doaj  

[Clinical characteristics and pathogens of infancy lower respiratory tract infections in infants with bronchopulmonary dysplasia]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2023
Liu XC, Gu MX, Sun M, Jiang QN.
europepmc   +1 more source

[Total and regional fat-to-muscle mass ratio and risk of incident benign ovarian neoplasm]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li H, Huang T, Wang L.
europepmc   +1 more source

[Pneumothorax during pediatric laparoscopic high ligation of hernia sac: A case report]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Lin Y, Huang Z, Zheng M, Fu W, Luo L, Tang L.   +5 more
europepmc   +1 more source

[Expert consensus on the diagnosis, treatment, and prevention of neonatal dengue, chikungunya, and Zika virus infections (2025)]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Perinatal Group, Pediatric Branch of the Chinese Medical Doctor Association; Editorial Board, Chinese Journal of Contemporary Pediatrics.   +2 more
europepmc   +1 more source

[Performance of a prompt engineering method for extracting individual risk factors of precocious puberty from electronic medical records]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zhou F, Zhong T, Yang G, Ding X, Yan Y.
europepmc   +1 more source

[Dielectric properties of tidal volume changes in rabbit lung tissue in the 100 MHz~1 GHz band]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Qin Y, Zhang L, Liu Y, Fu F, Yang B, Yang L, Liu X, Dai M.   +7 more
europepmc   +1 more source

[Design and simulation study of positive pressure ventilation system in a simulated human biological lung]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yan Q, Wu Q, Zhang W, Pan L, Liu X, Tao W.   +5 more
europepmc   +1 more source

[A clinical comparative study of domestic nasal packing sponge and imported nasopore sponge in post-sinusotomy care]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Liu S, Li T, Sun S, Yu P, Tu Y, Xiao L, Wan Y, Shi L.   +7 more
europepmc   +1 more source

[Design and validation of an automated testing system for essential performance parameters of ventilators]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Li Y, Wang W, Zhang C, Zhang X, Chen Z, Hu Z.   +5 more
europepmc   +1 more source