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海上换流站直流侧暂态过压应力抑制策略有效性分析 [PDF]

open access: yes全球能源互联网, 2021
欧洲北海等地区已经建设了多条基于柔性直流输电技术的海上风电并网工程,中国近些年也加速了该技术的工程实践。由于柔直系统阻尼低,直流侧暂态过电压、过电流发展快,需要采取必要的暂态应力抑制措施,降低对海上平台设备的技术要求,在尽可能减少设备尺寸的同时,保证足够的设备安全裕度。重点围绕暂态过电压应力,首先总结了海上柔直换流站直流侧暂态过电压应力的类型和关键指标,分别针对对称单极和对称双极结构系统,介绍了直流侧设备上承受过电压应力的机理,并梳理了影响直流侧过电压应力的主要因素。其次 ...
袁艺嘉   +4 more
doaj   +1 more source

We need to build the evidence: A systematic review of psychological first aid on mental health and well‐being

open access: yesJournal of Traumatic Stress, Volume 36, Issue 1, Page 5-16, February 2023., 2023
Abstract Ensuring effective mental health and psychosocial support is crucial following exposure to a potentially traumatic event and can have long‐term consequences for individuals, families, and communities. Psychological first aid (PFA) has become a widespread intervention of choice following exposure to conflict or disaster; however, its impact is ...
Sabrina Hermosilla   +5 more
wiley   +1 more source

A Prospective Study of Mental Health During the COVID‐19 Pandemic in Childhood Trauma–Exposed Individuals: Social Support Matters

open access: yesJournal of Traumatic Stress, Volume 34, Issue 3, Page 477-486, June 2021., 2021
Abstract The novel coronavirus disease 2019 (COVID‐19) pandemic and its unprecedented social restrictions may have serious mental health implications, especially in individuals who have experienced childhood traumatic experiences (CTEs). This prospective study aimed to investigate whether general psychopathology and posttraumatic stress disorder (PTSD)
Katja I. Seitz   +2 more
wiley   +1 more source

Do diverse landscapes provide for effective natural pest control in subtropical rice?

open access: yesJournal of Applied Ecology, Volume 57, Issue 1, Page 170-180, January 2020., 2020
Our findings question the cost‐effectiveness of current chemical‐based pest management in farming, and highlight opportunities for more ecologically based pest management strategies based on the widespread activity of natural enemies. Pest damage and biocontrol, however, are largely independent from the landscape context, which might be due to the ...
Yi Zou   +8 more
wiley   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua   +6 more
wiley   +1 more source

Deeper sociological insight needed for behaviour change: A systematic review of Chinese ivory consumption

open access: yesPeople and Nature, Volume 8, Issue 2, Page 270-282, February 2026.
Abstract Chinese consumer demand for ivory threatens vulnerable African elephant populations, despite long‐standing efforts to combat the illegal wildlife trade. Behavioural science approaches have been proposed to address these systemic behaviours. However, their robust use remains uncommon in demand management interventions.
Molly R. C. Brown   +3 more
wiley   +1 more source

Policy Effectiveness in Managing Drug Shortages: Evidence From South Korea (2015–2024)

open access: yesWorld Medical &Health Policy, Volume 17, Issue 3, Page 561-572, September 2025.
ABSTRACT Drug shortages represent a growing policy challenge for healthcare systems worldwide. This study investigates actual drug shortage events in South Korea from 2015 to 2024, using a “Shortage Occurred vs. Shortage Non‐Occurred” framework to distinguish real‐world disruptions from administrative classifications.
Seung‐Rae Yu
wiley   +1 more source

Associations between maternal smartphone use and mother‐infant responsiveness: A cluster analysis of potential risk and protective factors

open access: yesInfant Mental Health Journal: Infancy and Early Childhood, Volume 45, Issue 3, Page 341-353, May 2024.
Abstract Contradictory results in the extant literature suggests that additional risk factors should be considered when exploring the impacts of maternal smartphone use on mother‐infant relationships. This study used cluster analysis to explore whether certain risk factors were implicated in mother‐infant dyads with high smartphone use and low mother ...
Lisa Golds   +2 more
wiley   +1 more source

交直流气体绝缘管道输电装备微粒污染治理措施研究进展

open access: yesGaoya dianqi, 2021
气体绝缘输电设备内微粒污染物是造成设备故障的主要原因之一,随着设备电压等级的升高,微粒诱发的绝缘故障占设备总故障的比例越来越大,探索高效的微粒抑制措施,对降低设备故障率、保障设备安全稳定运行具有重要意义。文中对交直流GIS/GIL中微粒污染治理措施研究进展进行梳理,首先概述了气体绝缘设备中抑制微粒的基本原理,从微粒启举抑制、微粒运动调控和绝缘子表面微粒吸附抑制3方面阐述了如何降低微粒对设备绝缘的潜在威胁;进一步归纳总结了现有的微粒治理方法,对其优势和不足进行了评价,提出了该领域有待解决的关键问题 ...
常亚楠   +5 more
doaj  

配电网铁磁谐振综合抑制措施研究

open access: yesGaoya dianqi, 2016
10 kV系统铁磁谐振严重影响配网系统安全稳定运行,在考虑配网谐振抑制措施时研究者往往针对单独某一种措施进行分析。文中以曾经发生过铁磁谐振故障的某110 kV变电站10 kV系统为分析对象,在电磁暂态分析软件ATP-EMTP中建立仿真模型,考虑了消谐器、改变励磁特性、阻尼电阻3种抑制措施,分别对单一措施抑制效果和不同措施组合使用抑制效果进行了分析。分析表明,针对文中研究对象,不同抑制措施组合使用效果优于单一措施。不同抑制措施综合使用,为配网铁磁谐振的治理提供了新的思路。
张永胜, 刘守豹
doaj  

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