Results 31 to 40 of about 3,142 (119)
±800kV特高压直流输电线路带电更换V型绝缘子串进出电场方式研究
Dianci bileiqi, 2017 ±800 k V特高压直流输电线路一旦投入运行,则很难停电检修。为保证±800 k V特高压直流输电线路带电更换V型绝缘子串作业人员的安全,基于特高压直流输电线路及相应工具的实际参数,分别建立了采用软梯法和吊篮法进出电场的带电作业仿真模型。在不同的等电位作业人员与导线距离下,利用有限元法计算了不同进出电场方式的作业人员体表场强,从不同路径上作业人员体表场强大小这一角度,通过分析对比确定了基于吊篮法的进出电场方式;同时利用有限元法计算了等电位位置处作业人员体表场强,提出了带电作业人员的安全防护措施 ...
李金亮 +6 more
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Characterizing China's Illegal Trade in Avifauna on Social Media 中国社交媒体上非法鸟类贸易的特征分析
Integrative Conservation, Volume 4, Issue 4, Page 616-626, December 2025.Worldwide, illegal wildlife trade is an increasing threat to species conservation. Here, we used the social media data to characterize China's illegal online trade in avifauna for conservation implications. Our results found that 178 avian species have been posted online for illegal trading. ABSTRACT The illegal wildlife trade poses a growing threat to
Jiaping Xu, Luke Gibson, Aiwu Jiang
wiley +1 more source
Gaoya dianqi, 2007 利用光电电场传感器对复合绝缘子表面场强的分布进行了测量,采用平行金属板对研制的电场传感器进行了工频标定实验,并测量了绝缘子棒身表面附近的轴向电场和伞裙下方的径向电场分布。对绝缘子和连接金属导体进行了建模,并利用边界元法计算了绝缘子表面场强的分布,计算结果和测量值基本符合。
陈未远, 曾嵘, 张波, 梁曦东
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Integrative Conservation, Volume 4, Issue 4, Page 641-651, December 2025.Key Largo woodrats are a small and endangered island species, whose individuals tend to occur in family groups. Isolation from mainland populations, predation, and habitat fragmentation have caused genetic drift, leading to low overall diversity. Here, we found that a major category 4 hurricane promoted genetic diversity in the Key Largo woodrat ...
Taylor Ackley +5 more
wiley +1 more source
A new beef: An analysis of discourse coalitions in the nascent cellular agriculture policy subsystem
Review of Policy Research, Volume 42, Issue 6, Page 1404-1427, November 2025.Abstract A robust approach to examining the nature and influence of coalitions in the policy process is the Advocacy Coalition Framework (ACF), which is especially useful to study policy issues fraught with scientific and technical controversy. Yet, important gaps exist in ACF literature regarding nascent policy subsystems. Consequently, there is scant
Nikki Nadeau, Ramiro Berardo
wiley +1 more source
Review of Policy Research, Volume 42, Issue 6, Page 1509-1524, November 2025.ABSTRACT This paper provides a retrospective on California's oversight of 1,3‐dichloropropene (1,3‐D). It utilizes archival documents, including internal memos, emails, and risk assessments, to demonstrate how the state's Department of Pesticide Regulation consistently expanded allowable 1,3‐D use while presenting each policy change as scientifically ...
Kaitlyn Alvarez Noli
wiley +1 more source
基于Ansys的252kV GIS用三相共箱式电流互感器研发
Gaoya dianqi, 2016 为降低生产成本和装配难度,笔者对某型252 kV气体绝缘金属封闭开关设备（GIS）用"三相共箱式"电流互感器（CT）进行了优化设计,并利用Ansys软件对CT气室的电场强度及其壳体的机械强度进行了数值分析计算。结果表明,导体与屏蔽罩的同轴间隙是场强集中区,CT壳体小法兰与筒体连接外侧为应力薄弱区,壳体机械强度和CT整体电场强度均满足设计基准且具有一定的裕度。优化方案结构更紧凑,重量更轻,成本更低,总高度降低了340 mm,达到了预期目标。
王辉
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Trends of Nature Education Research in China: A Scholarly Review 中国自然教育研究趋势:学术综述
Integrative Conservation, Volume 4, Issue 3, Page 310-321, September 2025.This study reviews 87 articles on nature education in China (2014–2024), identifying three research types: philosophical, empirical, and practical. Findings show limited use of Chinese philosophies and a need for innovative interventions. Future research should strengthen local grounding and link research with practice.
Yue Li, Yun‐Wen Chan, Yu‐Chi Tseng
wiley +1 more source
Dualization and Social Policies: A Conceptual and Analytical Framework
Politics &Policy, Volume 53, Issue 3, June 2025.ABSTRACT This thematic review offers a conceptual and analytical framework to assess, identify, and explain the processes of dualization in labor markets and social protection systems in 21st‐century welfare states. After a brief historical examination of the concept's origins, we review the primary definitions, theories, and typologies developed to ...
Gibrán Cruz‐Martínez +1 more
wiley +1 more source
Gaoya dianqi, 2009 基于复合绝缘子的污闪理论,通过两种简化的硅橡胶平板模型,应用电场有限元计算软件ElecNet分别模拟了复合绝缘子护套表面和伞裙表面水滴的电场特性,着重研究比较了水滴的体积、接触角、形状等参数对水滴表面电场的影响,分析了两种模型中影响水滴表面电场强度的主要因素,并计算了复合绝缘子表面附着水滴时的电场,得出复合绝缘子伞裙上下表面以及护套表面附着的分离水滴使电场大大增强的结论。
王仲奕, 王琪, 陈青
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