Results 51 to 60 of about 686 (99)

[Strategic orthodontic treatment for multiple mesioangular impacted molars: a case report]. [PDF]

open access: yesHua Xi Kou Qiang Yi Xue Za Zhi
Zhan J   +5 more
europepmc   +1 more source

[Current status of breast milk management in neonatal intensive care units in Gansu Province]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Feng D   +5 more
europepmc   +1 more source

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  

[Efficacy and safety of laparoscopic nephron-sparing surgery for giant renal angio-myolipoma]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Duan P   +6 more
europepmc   +1 more source

Home - About - Disclaimer - Privacy