Results 31 to 40 of about 13,446 (156)
Journal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.ABSTRACT The National Quality Infrastructure (NQI) in a given country provides the essential framework for quality assurance integrating standardization, metrology, accreditation, and conformity assessment to create the technical backbone for industry and trade. Hence, building a resilient NQI is fundamental to securing medicine quality, enabling local
Addisu Afrassa Tegegne +3 more
wiley +1 more source
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
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
Journal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.ABSTRACT Bangladesh's goal of achieving high‐income status by 2041 requires dependable, low‐emission, and affordable energy. With near‐universal grid coverage and increasing demand, nuclear energy is a strategic asset for long‐term baseload supply. However, the existing financing model, typified by the country's most expensive $12.65 billion Rooppur ...
Hafiz Ahmed
wiley +1 more source
Study and Realize the Protection Device Base on the FREESCALE 56800 Family Dsp [PDF]
, 2010 电力系统自动化是自动化领域的一个主要分支，而微机型继电保护测控装置是电力系统中电气元件发生故障或不正常运行状态时，动作于断路器跳闸或发出信号的一种自动装置，是电力系统自动化的重要组成部分。现有微机保护装置大多基于传统的单片机，无法满足电力系统终端用户的高速度、高精度的特殊需求，随着电子技术发展，采用更先进的元件和更先进的方法来研究设计出能符合用户需求的产品，是行业的发展方向。本课题研究了国内外在继电保护方面先进的技术经验及最新的DSP技术的应用，提出了一种基于DSP内核的 ...
钟志斌
core
World Medical &Health Policy, Volume 17, Issue 4, Page 823-830, December 2025.ABSTRACT Sepsis is a leading cause of mortality in the United States, with over 350,000 deaths annually, yet the contribution of neighborhood‐level social determinants of health (SDoH) remains underexplored. We conducted a retrospective analysis of 4.4 million hospitalized patients with sepsis, identified using ICD‐10 codes, leveraging de‐identified ...
Ahad Khaleghi Ardabili +3 more
wiley +1 more source
Study about Relationship Marketing of Company T [PDF]
, 2002 输变电设备的市场形势，就其需求总量而论，今后五年仍将是一个平稳增长趋势。这两年输变电设备市场始终保持着与国民经济生产总值（GDP）相近的增长速度，即7%—8%的增长率，数据证明该行业是有增长，有效益的行业。这几年的市场局面是：外资进入、新兴的民营企业的崛起、原有老牌的国有企业，形成了三大板块的激烈竞争态势。因此，T公司必须分析自己的形势，扬长避短，方可在激烈的市场竞争中发展壮大。 本文通过查阅大量的资料，运用现代企业管理知识，并结合个人工作经验，对T公司的营销策略进行分析，提出适合T公司的营销理念 ...
林孔周
core
基于ATP-EMTP的10kV配电系统不同中性点接地方式电气特性仿真分析
Dianci bileiqi, 2020 中性点接地方式的选择对10 k V配电系统的运行及故障处理具有重要作用。笔者据此详细阐述了10 kV配电系统中性点接地方式,并根据实际参数建立了10 k V配电系统中性点接地仿真模型,分析了不同方式下的电流电压特性,得出以下结论:小电阻接地的故障点电流远高于其他接地方式,且故障和非故障线路的零序电流差异较大,而小电流接地方式下的零序电流基本一致,对故障选线造成困难;小电阻接地方式下,工频过电压和弧光接地过电压约为不接地方式的82%、51%,可采用绝缘水平较低的电气设备,减少10 k V配电系统投资 ...
王国彬 +6 more
doaj
基于ZNy11-Dyn7型无源降压消弧器件的高阻接地故障选线新方法
Dianci bileiqi, 2023 针对现有接地故障选线方法受系统参数不对称、互感器采样不同步影响，对于高阻接地故障馈线难以准确判别的问题，笔者提出了基于ZNy11-Dyn7无源降压消弧器件的高阻接地故障选线新方法。首先，提出了基于ZNy11-Dyn7型变压器的无源电压调控结构，分析了ZNy11-Dyn7型无源降压消弧器件接入系统后的运行特性。基于ZNy11-Dyn7型无源器件电压调控原理，在系统发生接地故障前后，分别通过无源器件投入调控系统电压，计算故障前后各馈线零序导纳值，消除系统参数不对称、互感器采样不同步影响 ...
陈虓 +5 more
doaj
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source