Results 61 to 70 of about 2,823 (156)

[Effects of cold atmosphere plasma treatment on the biological behavior of human gingival fibroblasts]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Zheng M   +7 more
europepmc   +1 more source

雷击500 kV输电线路杆塔分流特性计算研究

open access: yesDianci bileiqi
雷击对输电线路安全运行和设备可靠性造成了严重威胁。目前针对真实环境和运行条件下500 kV输电线路杆塔雷电流分流特性研究还不够全面。本研究利用ATP-EMTP进行雷击500 kV输电线路仿真计算,研究多种工况下被雷击杆塔的分流系数。研究结果表明,雷电流波头时间从1.2 μs增大至20 μs,杆塔分流系数降低40%;半波时间从20 μs增大至350 μs,杆塔分流系数降低0.8%;雷电流幅值对分流系数无影响;杆塔接地电阻从1 Ω增大至30 Ω,杆塔分流系数降低19.7 ...
李磊   +5 more
doaj  

[Prevalence characteristics of autoimmune thyroid disease in women aged 10-59 years in Qingdao City from 2022 to 2024]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Chen X   +8 more
europepmc   +1 more source

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