Results 41 to 50 of about 71,604 (169)
Gaoya dianqi, 2019 电力变压器绕组受短路电磁力作用后,可能出现可恢复的弹性变形或不可恢复的塑性变形。文中通过电磁-结构耦合有限元分析,对短路电流冲击作用下的变压器绕组弹、塑性变形特性进行理论分析和三维数值模拟,以揭示绕组弹性和塑性变形机理。首先通过有限元电磁计算分析了绕组内部短路电磁力分布,其中绕组线饼的周向电磁力分布不均是导致绕组变形的重要原因。在弹性变形计算的基础上,依据材料学的弹塑性变形分析理论,构建了绕组累积变形的量化分析模型,能够反映多次短路电磁力作用后绕组变形的累积效应。最后,以一台110 kV/25 000 ...
张海军 +4 more
doaj
Journal of Linguistic Anthropology, Volume 35, Issue 2, August 2025.Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley +1 more source
燃料电池组模块及燃料电池组的模块化组装及修复方法 [PDF]
, 2006 本发明涉及燃料电池领域，具体为一种燃料电池组模块及燃料电池组的模块化组装及修复方法。燃料电池组模块双极板和MEA通过连接件组装成燃料电池组模块；首先将燃料电池组分为多个单元模块进行组装，由双极板和MEA组装成燃料电池组模块，组装电池组时，根据电池组的功率要求，将多个燃料电池模块利用端板和固定螺杆将燃料电池模块组装在一起，获得所需要的模块化电池组；电池组中个别节运行过程中出现损坏时，将出现损坏电池的模块进行更换修复。该方法对电池组组装结构作以改进，电池组进行模块化组装 ...
洪有陆 +6 more
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Gaoya dianqi, 2019 振动法在变压器机械故障诊断中得到了越来越广泛的应用,文中研究了变压器绕组轴向振动特性,为振动法的研究建立必要的理论基础。文中介绍了基于质量—弹簧模型的变压器绕组轴向振动机理,搭建了基于压电式加速度传感器的变压器单绕组模型振动测试平台,探究了变压器绕组轴向振动分布特点,以及负载电流波动和绕组松动对其产生的影响。实验研究发现单绕组模型轴向振动近似呈U型分布,电流波动对绕组的振动分布无明显影响,绕组的松紧程度改变,绕组的振动分布发生明显变化。
余长厅 +3 more
doaj
Trump, Personalism, and US Administrative Capacity
Politics &Policy, Volume 53, Issue 4, August 2025.ABSTRACT Donald Trump represents an extraordinary degree of personalism in American politics, especially given the traditional power and capacity of the Republican Party and American democracy. A lesson Trump drew from his first term in office is that he needed to better institutionalize mechanisms of personal loyalty to deal with perceived betrayals ...
Donald Moynihan
wiley +1 more source
, 2012 本发明提供一种高精度摆镜轴系组件组合调校方法，该组合调校方法包括以下步骤：（1）粗加工各零件；（2）再半精加工各零件；（3）组装各零件构成待精加工的摆镜组件；（4）对左轴和右轴分别进行精加工，使得尺寸、圆柱度、端面垂直度、以及左、右轴同轴度符合设计要求；然后根据此时摆镜组件中左、右轴所确定的左右轴旋转中心线精加工摆镜座的摆镜安放槽，使得摆镜安装面位置与左右轴旋转中心线符合平行度和垂直距离的设计要求；（5）配钻、铰削摆镜座左、右两侧的定位销钉孔，试装轴定位销钉。本发明简化了调校操作过程 ...
杨宾宏, 彭小强, 邓小国, 李华
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Policy &Internet, Volume 17, Issue 2, June 2025.Abstract The introduction of EU's Digital Market Directive, especially the so‐called Article 13, caused a lot of controversy. A varied assembly of actors protested, including Internet activists, academics, NGO's such as Wikipedia, and owners of platforms for user generated content. They feared regulations would stifle the distribution of user generated
Madelen Riise +2 more
wiley +1 more source
浮萍(Landoltia punctata)基因组组装注释评估及其功能基因组初步分析 [PDF]
, 2017 浮萍（Duckweed）是世界公认的、最小的、浮水生高等开花植物，其繁殖速度快并且具有独特的生理特性，在生物质资源和污水处理方面潜能非凡：浮萍以无性繁殖为主，可以通过诱导开花；能在特殊处理条件下，快速获得高淀粉积累；能在多种重金属水体环境下生长繁殖，并表现出优秀的重金属富集能力；能在多种生活污水中生长，并获得较高的淀粉和蛋白积累效果等研究都表明浮萍具有高度适应环境的能力和潜能，同时这些生理特征在浮萍亚科内在也表现出一定的差异。本实验室筛获了一株高淀粉积累少根紫萍，对于其优秀的生理特性和生物潜能应用 ...
李志丹
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Social science integration at state and federal fish and wildlife organizations in the United States
Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Increasingly, conservation professionals and scholars recognize the need for more holistic integration of social science in fish and wildlife management. This call is often framed around the complexity of 21st century conservation challenges and changing societal values toward fish and wildlife and its management.
Michael R. Quartuch +7 more
wiley +1 more source