Results 51 to 60 of about 2,401 (103)
Dianci bileiqi, 2004 简要分析了雷电波侵入变电所时,避雷器与被保护设备之间的最大距离l对被保护设备的影响;重点讨论了利用公式推导l的过程,l的误差可以通过调整系数加以消除;指出了单回路的模型和计算公式适合在全程架空进线及通过一段电缆进线的情况下使用。
杨连武
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野生动物学报, 2006 笔者于2006年3～4月对吉林莫莫格国家级自然保护区的夜鹭的巢区结构进行研究。研究内容包括夜鹭巢的数量、巢间距、巢位高、每棵树上的夜鹭巢数及分布类型等。结果表明夜鹭筑巢主要选择树高20．04m（±1．96m）、树径20．9cm（±3．3cm）且离水源较近的杨树林,巢位置在距地面高度为19．81m（±1．26m）,距树顶的距离为2．23m（±1．47m）。夜鹭巢的巢间距6．27m（±3．64m）,且50．9％夜鹭选择一棵树上仅筑一个巢。夜鹭巢分布状态服从集群分布。
王祎楠, 李梦莎
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Dianci bileiqi, 2011 分析了25 kV铁道输电线路及电力机车的雷击点,计算了避雷器对被保护设备的有效距离,并用PSCAD对其进行仿真,计算及仿真结果表明,选择合适的避雷器可以很好地保护车顶高压电气设备。该研究为电力机车高压电气设备的有效防雷过电压提供了参考。
吴荣平 +4 more
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[Initial exploration of the relationship between homeostatic occlusion and long-term dental implant stability]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiChen J, Wu L.
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[Neuroprotective effects of idebenone combined with borneol via the dopamine signaling pathway in a transgenic zebrafish model of Parkinson's disease]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiWang Q +5 more
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[Efficacy of free lateral arm tissue flap in repairing complex finger wounds]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiYang X +7 more
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[Effects of ultrathin inguinal flap free transplantation in repairing hand and foot wounds]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiZhang WD +6 more
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[Measurement and clinical validation of safe distance for LC- <b>Ⅱ</b> screw placement using iliac oblique view]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiFu H, Wang A, Chen L.
europepmc +1 more source
[Aesthetic goals of hypospadias repair]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiTang Y.
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[Experience of the use of cerebral embolic protection device during transcatheter aortic valve replacement]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanZhang L +7 more
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