Results 51 to 60 of about 608 (134)
[A prospective study of vertebroplasty with reverse designed unilateral targeted puncture for osteoporotic thoracolumbar compression fractures]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2022 Hao Y, Zhou Y, Zhuo H, Chai X, Huang Y.
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Dianci bileiqi, 2018 在盘形悬式绝缘子表面涂覆RTV涂料是一种极为有效的防污闪措施。但由于施工、制造过程没有统一标准,导致实际运行的绝缘子产品表面涂覆效果差异较大,如有的涂料把铁帽覆盖住,有的涂料未覆盖绝缘子上表面等。不同涂覆效果可能会直接影响绝缘子的电气特性。以三种典型不同涂覆试品为对象,在国家电网公司重点实验室分别进行油中击穿耐受电压试验、直流干闪络电压试验,同时,通过ANSYS仿真软件,对试品分别建模分析场强分布情况。结果显示:当RTV涂层上边缘正好与铁帽和瓷件的结合处重合时,其直流干闪络电压最低 ...
武文华 +5 more
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[Anatomical characteristics and clinical application of anterolateral thigh perforator flap pedicled with oblique branch trunk of lateral circumflex femoral artery in the muscular septum]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2022 Yang L +9 more
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Dianci bileiqi, 1988 为保障人身安全,日本的高压配电线路采用绝缘导线,绝缘导线受雷击而烧损的事故与日俱增,其原因是雷击穿导线绝缘层,续流电弧流过击穿处而烧熔。为此,发展了带ZnO阀片的限流招弧羊角,可遮断续流防止导线熔断。在使用裸导线时 ...
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[A prospective study of the perforator evaluation and eccentric design of anterolateral thigh flap based on superficial fascial perforators assisted by modified computed tomography angiography]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2023 Zhang YH +8 more
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[Recent progress in the treatment of intractable sialolithiasis]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2023 Liu DG +9 more
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Clinical efficacy of simple taper retentive implants in immediate posterior dental implantation for 5-7 years. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Ren B, Guo S, Xu Y, Dai J, Wei H.
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Gaoya dianqi, 2015 为研究油纸套管的寿命分布以及发生层间击穿后的剩余寿命,结合绝缘材料寿命的威布尔分布理论,建立了套管绝缘层寿命模型。并利用蒙特卡罗方法仿真计算了某型号110 k V油纸套管的寿命分布以及发生层间击穿后的剩余寿命分布。研究表明,该型号油纸套管的寿命符合形状参数为19.68,尺度参数为22.05的威布尔分布。当发生一层和两层击穿之后,形状参数分别减小为5.47和0.22,这意味着发生层间击穿之后由于电场分布的改变使得套管的寿命会迅速减小,层间击穿对于套管内绝缘是一个自加速过程 ...
杨贤 +5 more
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