Results 21 to 30 of about 395,077 (141)
Gaoya dianqi, 2021 真空灭弧室的灭弧性能与真空灭弧室触头的磁场特性密切相关,其中纵向磁场(AMF)灭弧技术与横向磁场(TMF)灭弧技术应用最为普遍。基于人工零点的高压直流真空断路器,引入高频震荡电流帮助开断,为了分析真空断路器开断高频电流情况下的磁场特性,文中建立了两种类型的触头结构进行有限元仿真,对比分析真空灭弧室磁场特性以及触头片涡流情况。结果表明:在高频电流开断情况下,横磁结构触头与纵磁结构触头相比有更好的磁场特性分布;触头片涡流是影响纵磁结构触头磁场特性恶劣的关键因素,而对横磁触头间隙磁场特性几乎没有影响。
李如春 +4 more
doaj
International Journal of Applied Linguistics, EarlyView.ABSTRACT This qualitative multiple case study explores multilingual postgraduate students’ academic identities through writing at an EMI university in Hong Kong, with a focus on how they gain legitimacy in knowledge‑making with their multilingual repertoires. Grounded in a poststructuralist understanding of identities as fluid and negotiated, the study
Siqi Song, Ken Lau
wiley +1 more source
, 2017 本发明公开一种用于碳氢燃料超声速燃烧过程的流场和火焰结构同步探测的方法。该方法采用脉冲纹影探测超声速燃烧场的流场结构，采用CH‑PLIF探测超声速燃烧场的火焰结构。将脉冲纹影和CH‑PLIF的探测焦平面分别聚焦到超声速燃烧室内部相同探测区域，通过脉冲同步发生器对脉冲纹影和CH‑PLIF进行同步控制，实现碳氢燃料超声速燃烧过程的流场和火焰结构同步探测。将扣除燃烧室背景噪声的火焰结构CH‑PLIF图像与流场结构的纹影图像相叠加，得到碳氢燃料超声速燃烧过程中同一瞬态的流场和火焰结构的同步叠加图像 ...
袁越明 +3 more
core +2 more sources
Gaoya dianqi, 2023 换流站内复杂电磁环境会对电力设备在线监测装置测量结果产生不利影响，为了提高装置测量结果的稳定性和可靠性，有必要对换流站设备附近区域的电磁场进行测量并分析其分布规律。文中利用电磁场分析仪对4所±500 kV换流站变压器、高抗、避雷器、电压互感器等附近的工频电场、磁场进行了测量。测量结果表明：所有被测换流站75%以上测点的电场强度分布在0～15 k V/m，最大值出现在避雷器附近，为32.6 kV/m；约90%测点的磁感应强度分布在0～80μT，最大值出现在换流变附近，为0.26 mT。基于实测结果 ...
贺家慧 +4 more
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AI foundation models in plant biology
New Phytologist, EarlyView.Foundation models decode genomes, engineer proteins, phenotype crops, and drive AI agents across plant biology. This figure was created in BioRender (BioRender.com/xcmmkel). Summary Rapid technological progress has enabled plant biologists to accumulate unprecedented volumes of multi‐scale, multi‐modal data, yet this abundance of data has intensified ...
Haopeng Yu
wiley +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Silicon carbide (SiC) is an ultra‐hard ceramic material and is intrinsically difficult to sinter. Pressureless solid‐state sintering (PS) typically requires high temperatures exceeding 2200°C and a prolonged heating cycle, whereas liquid‐phase sintering lowers the processing temperature at the expense of high‐temperature mechanical performance.
Meicen Fan +5 more
wiley +1 more source
Sexuality, Gender &Policy, Volume 9, Issue 4, November 2026.ABSTRACT This study explores how 2SLGBTQ+ youth in Alberta, Canada—the country's most Conservative province—mobilize queer joy as a form of resistance amid rising anti‐queer and anti‐trans policies under a settler colonial, cisheteropatriarchal regime. Drawing from youth‐produced collages, we demonstrate that this visual arts‐based participatory method
JJ Wright, Gillian Robinson
wiley +1 more source
Gaoya dianqi, 2014 直流输电工程与交流输变电工程不同,直流设备周围的电场为直流静电场和空间离子流场的综合场。但是,目前,国内直流输电工程的检修作业人员安全防护基本参照同等电压等级的交流输变电工程进行。当现场使用大型机具进行带电施工和检修时,由于机具的进入,作业现场的直流综合场和空间离子流分布会影响检修作业人员的安全防护效果。因此,笔者针对直流换流站的现场实际布置情况,对换流站典型施工区域有/无机具条件下的直流合成电场和离子流密度进行了测试。测试结果表明,有大型机具存在时,由于机具本体的屏蔽作用 ...
蔡焕青 +7 more
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Antipode, Volume 58, Issue 6, November 2026.ABSTRACT Across British cities, everyday street infrastructure is increasingly sustained through revenue‐generating concessions that detach maintenance from direct municipal budgets. This article examines how street furniture in Glasgow has been incrementally reorganized as an assetizing apparatus under prolonged austerity.
Sinan Wang
wiley +1 more source
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Public consultations are a cornerstone of democratic policymaking, yet the sheer volume and heterogeneity of submissions often overwhelm traditional analysis. Emerging large language models (LLMs) offer new opportunities for making sense of such data, but their performance in contexts with high linguistic and technical diversity remains ...
Edgar Mathevet, Lauriane Cailleux
wiley +1 more source