Results 61 to 70 of about 688 (120)
Youth engagement in global conservation governance
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Youth are increasingly recognized for their important role in shaping environmental decisions surrounding conservation. Regrettably, youth who are crucial decision‐makers are often excluded from environmental governance spaces due to structural barriers, both economic and political.
Samantha S. Sithole +3 more
wiley +1 more source
Triggering policy learning via formal EU evaluation requirements in the case of Cohesion Policy
European Policy Analysis, Volume 10, Issue 4, Page 515-531, Fall 2024.Abstract The European Union (EU), especially in the context of Cohesion Policy (CP), has played a crucial role in developing and promoting policy evaluation practices across its Member States. Evaluation systems across the Member States have been established to assess CP investments.
Nicola Francesco Dotti +4 more
wiley +1 more source
Gaoya dianqi, 2019 大型油浸式电力变压器负载损耗较高,且绕组及油道结构复杂,为更好地掌握大型油浸式电力变压器绕组温度场分布特性,文中针对220 kV大型油浸式电力变压器,在分析变压器损耗与传热的基础上,建立了变压器流体力学-温度场耦合的仿真模型,基于有限元分析求得变压器内部温度—流体场,研究结果表明:由于绕组内部起导油作用的油道隔板的影响,温度沿绕组轴向高度呈周期性上升趋势;绕组局部温度分布不均衡,对绕组油道结构进行优化设计可改善绕组温度分布的局部不均衡性,降低绕组热点温度。
刘弘景 +6 more
doaj
Mediated trust, the internet and artificial intelligence: Ideas, interests, institutions and futures
Policy &Internet, Volume 16, Issue 2, Page 443-457, June 2024.Abstract This paper addresses the question of trust in communication, or mediated trust, with regard to the historical evolution of the Internet and, more recently, debates around the impacts of artificial intelligence (AI). At a conceptual level, it proposes a ‘Three I's’ framework of ideas, interests, and institutions as a way of understanding how ...
Terry Flew
wiley +1 more source
Review on position estimation methods to permanent magnet brushless servo motors [PDF]
, 2016 2000-2001 > Academic research: refereed > Publication in refereed journalVersion of ...
Chen, YR, Cheung, NC, Wu, J
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Gaoya dianqi, 2017 电力变压器短路故障产生的短路冲击会造成绕组变形,限制系统短路电流对降低变压器绕组动态变形意义重大。文中以110 kV电压等级的三绕组电力变压器为例,中压绕组发生出口短路故障时,基于磁—力学耦合场研究方法,对变阻抗变压器和常规变压器绕组动态变形进行数值分析。变阻抗变压器的研究包括变压器本体和限流电抗器2部分,分析了短路电流作用下,变压器绕组和限流电抗器线圈的变形、动态应力、位移。常规变压器和变阻抗变压器绕组变形的对比可得变阻抗变压器变形量较小。分析结果为变阻抗变压器绕组变形状态评估提供参考依据。
杜玮 +6 more
doaj
Design and Simulation of a New Axial-field Permanent-magnet DC Generator [PDF]
, 2008 对一种新型小功率盘式永磁直流风力发电机的原理和电磁设计进行了分析和推导,利用Ansoft Maxwell 3D软件对电机的磁场分布和运动情况进行了仿真,其结果可为进一步研究提供参考。In this paper,an innovative model of vertical-axis permanent-magnet direct-current wind-energy generator has been presented.Its working principle and ...
杜华夏 +3 more
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, 2011 运用多体动力学软件AdAMS/VIEW模块建立f-SAE赛车后悬架模型,并对模型进行仿真分析,研究分析fSAE赛车运动中后悬架随车轮上下跳动时定位参数的变化规律,评价悬架数据合理性。采用优化分析对悬架不合理数据进行优化,进一步改善悬架系统性能 ...
葛晓宏, 郭刚, 黄红武
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Gaoya dianqi, 2001 变压器在受到冲击波作用时 ,绕组内产生的过电压会损坏绕组绝缘。本文讨论了变压器绕组暂态响应的特性和分析方法 ,并进行了相关的试验研究 ,最后还对绕组的谐振现象进行了初步探讨。
颜湘莲, 文远芳, 邹积岩
doaj
The New Scheme Research of Step Motor Drive [PDF]
, 2012 新兴的计算机工业迅速将步进电机采用到外设应用当中。步进电机的主要优势在于能提供开环位置控制,而成本只是需要反馈的伺服系统的几分之一。通过分析步进电机几种常见的驱动方式,并研究了步进电机驱动控制中的关键技术,认真学习了东芝公司的大功率步进电机驱动芯片THb6064H的相关资料,在充分考虑步进电机在节能灯流程控制中的具体要求的前提下,本文通过实验仿真和应用实例,证明了该步进电机驱动方案简单、准确,有效。The step motor has already applied into the ...
李素勋, 杨博
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