Results 11 to 20 of about 615,703 (149)
THE U.S. WITHDRAWAL, TALIBAN TAKEOVER, AND ONTOLOGICAL (IN)SECURITY IN AFGHANISTAN
World Affairs, Volume 186, Issue 1, Page 105-134, Spring 2023., 2023 Security discussions of the Taliban's second takeover of Afghanistan center on physical security threats, neglecting the ontological aspect related to how security entails the metaphysics of life—being, feeling alive, or having a sense of self. This article examines this ontological threat to the Afghan people to complement the security discussion and ...
Thomas Ameyaw‐Brobbey
wiley +1 more source
Statistical matching for conservation science
Conservation Biology, Volume 34, Issue 3, Page 538-549, June 2020., 2020 Abstract The awareness of the need for robust impact evaluations in conservation is growing and statistical matching techniques are increasingly being used to assess the impacts of conservation interventions. Used appropriately matching approaches are powerful tools, but they also pose potential pitfalls.
Judith Schleicher +5 more
wiley +1 more source
Gaoya dianqi, 2022 近些年变压器真空有载分接开关故障频发，严重影响了电网系统的安全稳定运行。油中溶解气体分析是发现真空有载分接开关内部潜伏性电气故障的有效手段。针对当前真空有载分接开关油中溶解气体分析缺乏有效判据的难题，文中在分析了近5年真空有载分接开关的故障案例和604台在运真空有载分接开关油中溶解气体数据的基础上，提出乙炔是反映真空有载分接开关运行状态的主要特征气体，并结合吊芯检查结果提出采用乙炔增长率作为判断真空有载分接开关运行状态的状态量。接着，文中通过多台真空有载分接开关切换模拟试验确定了乙炔增长率的阈值大小 ...
金雷, 周凯, 罗维, 鲁非, 刘睿
doaj
, 2015 一种用于空间环境模拟真空设备的复合装置，包括铝筒，所述铝筒设置在真空室内；冷媒管，所述冷媒管分布在铝筒的外壁表面，所述冷媒管连接波纹管，所述波纹管与设置在真空室外的制冷器相连接；绝缘加热带，所述绝缘加热带与绝缘加热带电源连接，所述绝缘加热带分布在铝筒外壁面；温度开关，所述温度开关设置在铝筒的外壁面上；热电偶，所述热电偶置于铝筒外壁面之上，所述热电偶连接温控表。本发明的有益效果：本发明集成高低温热沉、全截面法拉第、高温红外烘烤三种功能于一个装置中，其结构简单、节省空间、经济实用 ...
高辉, 康琦, 段俐, 胡良
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Developmental 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
, 2013 本发明公开了一种具有消波结构的激波风洞真空罐装置，该装置包括：水平主真空罐和竖真空罐，水平主真空罐的一端与激波风洞实验段连通，另一端与竖真空罐相连通；在所述竖真空罐上还连通设置有一个以上的水平副真空罐，所述水平副真空罐的另一端封闭。本发明通过在水平主真空罐的一端连通设置竖真空罐，并在竖真空罐上连通设置1个以上的水平副真空罐，真空罐内部空间形成连通的空间并具有复杂的空间结构 ...
姜宗林, 刘云峰, 赵伟, 俞鸿儒
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Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca +23 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Biodegradable Zn‐based alloys are promising candidates for temporary implants, yet excessive Zn2+ release during degradation may induce cytotoxicity and adverse tissue responses. In this study, Zn‐xBa alloys (x = 0.1 wt%, 0.5 wt%, 1.0 wt% and 3.0 wt%) were developed to achieve controlled corrosion behaviors with improved biocompatibility.
Liu‐Dang Fang +9 more
wiley +1 more source
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
Gaoya dianqi, 2021 真空开关开断电感性负载时,电弧重燃是产生严重操作过电压的根本原因。真空开关选相操作可以消除电弧重燃,避免严重的操作过电压。选相真空开关的机械稳定性是保证可靠选相操作的关键,对选相真空开关的机械稳定性进行在线检测,可及时发现和避免选相失效。文中提出两种选相特性在线检测方法:在选相真空开关的操动机构上设置一个和主触头动作稳定同步的辅助接点,用于触头刚分时刻的信号传感,可实现选相特性的在线检测和选相操作的自适应控制,及时发现选相特性劣化,避免选相失效;通过检测真空开关开断过程中的空间电磁波 ...
郑一鸣 +5 more
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