Results 81 to 90 of about 198 (119)
Dianci bileiqi, 2017 智能电网的快速发展带动了智能电表的普及应用,同时也伴随着日益严重的雷电灾害问题。为了合理保护智能电表等终端采集设备,需要研究雷电浪涌对其危害。通过对智能电表进行雷电浪涌抗扰度试验,分析其损坏形式和失效原因。利用ATP-EMTP软件搭建配电系统模型,分析雷电侵入波对智能电表的危害。试验与仿真结果表明:智能电表损坏形式主要为表内采集器损坏、电源模块损坏、RS485口损坏;智能电表终端距变压器距离越近,终端过电压幅值越大;接地电阻对终端SPD保护效果影响较大,接地电阻的增大降低了保护效果 ...
郭红霞 +6 more
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Lacustrine sedimentary response to natural hazards [PDF]
Lacustrine sediments store a wealth of information and are often used to indicate climate change. Natural disasters such as earthquake, flood, landslide or collapse usually form characteristic disturbances in lacustrine sediments, which can be analyzed ...
Linlin Li, Yingying Li, Zhongtai He
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Dianci bileiqi, 2003 电压瞬变和浪涌将导致微电子设备的损坏,微电子设备的防护问题已经得到越来越多的重视。防护过电压常采用均压、分流、屏蔽、接地和保护等措施,介绍了防护器件的种类及特性并指出各自的优缺点,还介绍了微电子设备过电压保护的多级防护。
千涛
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Advances in the study of internal solitary waves and their interaction with marine structures [PDF]
Internal solitary waves (ISWs) are a common nonlinear, large-amplitude fluctuation phenomenon which is widely present in densely stratified oceans and can induce the shear state of the seawater flow above and below the wave surface during the propagation
Haibao HU +6 more
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[Chinese multidisciplinary expert consensus on combined immunotherapy based on immune checkpoint inhibitors for hepatocellular carcinoma(2021 version)]. [PDF]
Zhonghua Gan Zang Bing Za Zhi, 2021 Chinese Chapter of the International Hepato-Pancreato-Biliary Association; +4 more
europepmc +1 more source
, 2019 本文根据地方志书记载,考证历史上的朝宗宫主祀神是妈祖;又据历史背景和清咸丰元年陈世荣撰写的碑记,否定朝宗宫始建于1662年之说,提出应始建于清雍正年间的新说。本文对该宫兴建的因由、清代建筑规模等也作了探讨。简述朝宗宫衰落于民国时期 ...
石奕龙
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Gaoya dianqi, 2015 随着太阳能光伏发电的广泛应用,光伏方阵和设备遭受雷击引发的灾害事故也频繁发生。文中结合光伏发电系统实例计算了雷击引起的损害风险,得出了雷电感应电压、雷电感应电流与雷电强度、雷电平均陡度、雷电距离、光伏倾角之间的关系,估算了雷击安全距离。采取工程性防御措施,从防直击雷、防闪电电涌侵入和防雷击电磁脉冲角度,提出了一整套完整可行的雷电防御方案,重点分析了多级浪涌保护器的参数选取和能量相互配合的方法。
杨磊, 谭涌波, 强玉华, 彭哲文
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野生动物学报, 1988 在澳大利亚维多利亚州的南海上,有个菲利蒲小岛。凡是到澳大利亚旅行的人都很想到这里,看看具有世界上最准确的生物钟的仙企鹅登陆的奇景。岛上有块告示牌上写着:仙企鹅下午八时零五分登陆。当时针指向八时零五分的时候,只见第一只仙企鹅从汹涌澎湃的浪涛中游上岸边 ...
张建平
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〈翻訳〉莫道才著「中国湖南省汨羅の民間に伝わる葬礼"招魂詞"の形式と内容およびそれに拠る『楚辞』研究上の発見」 [PDF]
, 1999 Departmental Bulletin Paper滋賀大学経済学部研究年報, 6, pp.
戸崎, 哲彦
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[Concerns and preventive interventions in the treatment of pre-hepatic failure]. [PDF]
Zhonghua Gan Zang Bing Za Zhi, 2020 Duan ZP.
europepmc +1 more source