Results 41 to 50 of about 15,529 (196)
, 2016 校园路灯照明效果对于良好校园气氛的营造以及校园安全的保障起着重要的作用,文章以参加我校校区路灯改造及马来西亚分校建设的经验谈起,从校园路灯照度、路灯布设方式、光源种类、供电方式及电缆线路 ...
余永顺
core
Improvement and Engineering Application on Pulse Power Supply of Electrostatic Precipitator in Coal-Fired Power Plant [PDF]
ObjectivesHigh voltage power supply is the core equipment of electrostatic precipitator (ESP). Pulse power supply can achieve efficient removal of high specific resistance dust, but there are problems such as high pulse voltage causing heating and ...
HE Yuzhong +3 more
core +1 more source
Policy Studies Journal, EarlyView.ABSTRACT Why did Australia go from the White Australia Policy, which excluded non‐whites, to institutionalizing multiculturalism policy in the 1970s? This question defies traditional political ideologies of the major political parties, which had long supported the White Australia Policy. This article is a rare empirical demonstration of the Five‐Thread
Julius C. S. Mok
wiley +1 more source
Gaoya dianqi, 2017 为获得适合城市微电网的接地方案,文中基于城市微电网接地案例在PSCAD/EMTDC中搭建3种不同接地方式（TN、TT及IT）的仿真模型,研究了各接地系统故障电流水平,仿真验证了过流保护及剩余电流动作保护的灵敏性;基于仿真模型,分析了总等电位联接下TN接地系统的安全性,并提出非等电位联接下TT及IT接地系统要配置快速可靠的剩余电流动作保护装置。综合各接地系统优缺点,获得适用于城市微电网案例的混合接地系统。
张合栋 +4 more
doaj
Design and Implementation of distribution network fault processing system [PDF]
, 2011 随着配电网络的迅速发展和客户对电能质量及供电服务的要求不断提高，实现配电网的自动化已成为电力系统发展的趋势。配电网作为输配电系统的最后一个环节，其实现自动化的程度与供用电的质量和可靠性密切相关。配网因其线路复杂，故障检测与定位一直是困扰检修工作的难题，人工检测耗时耗力，停电时间长，设备损害大。采用本文论述的配网故障处理可提高检测效率，缩短停电时间、减轻检修工作强度。并系统改变了国内同类系统只能检修人员到现场，通过故障指示器的翻牌信息进行故障判断的现状，系统的实现可成为配网自动化的重要组成部分 ...
刘卫斌
core
, 2019 在现代建筑工程中，电气施工中的接地系统至关重要，其保障了整个电气系统的功能性和稳定性，关乎人的生命安全和经济财产安全。本文简要论述了接地和等电位联结的特点和关系，认为应认识到建筑电气设计中等电位联结的重要性，而不必要求人工接地极的接地电阻。
西亚 马
core +1 more source
Functional Ecology, Volume 40, Issue 4, Page 983-1000, April 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
Gaoya dianqi, 2007 在分析现有各种小电流接地系统单相接地故障选线方法的基础上,对小电流接地系统单相接地故障的系统零序电压和线路零序电流的相轨迹特性进行了深入分析,提出了使用相轨迹方法来选线的原理。该方法计算简单方便,结果直观易懂,选线结果不受CT极性影响。该原理适用于中性点不接地系统和非有效接地系统,并在该系统发生间歇性接地故障时仍可保证正确选线,比其它方法容易实现。通过MATLAB环境不同条件下各种接地故障的仿真研究,验证了上述方法的正确性。
李功新
doaj
Research on Three-phase UPS with Unbalanced Load [PDF]
, 2016 三相电压的对称输出是衡量交流电源性能的一个重要指标。提出了一种新型的三相UPS逆变器系统,利用Δ/Z0型变压器为三相不平衡负载造成的零序电流分量提供通路,再通过设计正、负序双PI控制器抑制不平衡负载中负序电压分量。从而解决零序电压和负序电压造成的三相电压不平衡问题,使该三相UPS逆变电源系统可带三相不平衡负载。试制一台60k VA的三相UPS样机,并给出实验结果。The balanced output of three-phase voltage is an important index to ...
叶彬城, 孟超, 魏闻
core
Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source