Results 61 to 70 of about 631 (100)

基于拉力值的不同电压等级避雷线融冰进程、脱冰瞬间阈值识别研究

open access: yesDianci bileiqi
针对目前缺乏对避雷线融冰进程有效识别的现状,同时避雷线相对于其它相线更容易因覆冰发生断线的风险,因此本文利用覆冰期避雷线融冰过程实时拉力监测值,为克服不同型号、档距对拉力基准值的影响,综合考虑融冰过程中水平应力、垂直档距、垂直荷载变化特征,建立单位长度冰重计算模型,结合200条避雷线实际监测融冰拉力值为样本数据,分别研究110、220、500 kV避雷线融冰过程中单位长度冰重变化速率、脱冰瞬间冰重变化概率分布情况。研究表明:不同电压等级避雷线融冰过程单位长度冰重变化率阈值分别为-0.035、-0.049、
曾华荣   +4 more
doaj  

[Pathogen Profile and Risk Factors for Hospital-Acquired Infection in Stroke Patients]. [PDF]

open access: yesSichuan Da Xue Xue Bao Yi Xue Ban
Xu T   +6 more
europepmc   +1 more source

[Transoral endoscopic-assisted submandibular gland resection with low-temperature plasma knife: clinical efficacy and literature review]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Tan Q   +5 more
europepmc   +1 more source

[Effectiveness of innervated medial plantar flap for reconstruction of soft tissue defects following foot tumor resection]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang W   +8 more
europepmc   +1 more source

[Application of iceberg theory in the diagnosis and treatment of refractory wounds at the surgical site after craniotomy]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Zhang PH, Zhang YK, Liang PF.
europepmc   +1 more source

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