Results 11 to 20 of about 920,820 (157)
, 2023 为覆盖月基引力波探测的0.1～5 Hz测量频段，进一步提高引力波探测的灵敏度，月基引力波探测方案被提出。在简要介绍引力波数学描述及特性的基础上，对当前已有的几种主要月基引力波探测方案进行了介绍，重点论述了各方案的探测原理、探测灵敏度以及探测目标；将月基探测方案与地面及空间探测方案进行了对比；讨论分析了月基引力波探测方案实施所需要考虑的关键问题，给出了可能的解决方法；讨论分析了月基引力波探测可能的主要噪声源以及对应的影响量级 ...
吴铠岚 +9 more
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Exploring English Language Learners’ Vocabulary Knowledge and Usage When Speaking
International Journal of Applied Linguistics, EarlyView.ABSTRACT Vocabulary forms a fundamental component of speaking ability, as it enables speakers to convey meaning accurately, fluently, and effectively. Although the relationship between vocabulary and speaking has been investigated to some extent, gaps remain in understanding the link between learners’ vocabulary knowledge and their speaking proficiency,
Junyan Guo, Martin East
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, 2020 我国空间引力波探测"太极计划"将打开中低频段(0.1 mHz～1 Hz)的引力波观测窗口,为人类研究宇宙起源与演化、黑洞起源与演化、引力本质、暗能量和暗物质等提供全新的方法和手段。由于空间引力波探测涉及一系列关键技术,太极计划提出了"单星""双星"和"三星"3步走的发展路线图。目前"单星"计划——"太极1号"发射成功,并圆满完成了第一阶段的在轨测试 ...
张敏 +4 more
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Dianci bileiqi, 2021 配电线路一般为裸导线,鸟类活动容易引起线路故障,传统驱鸟手段易让鸟类产生适应性。为此,基于鸟类生态学,提出了驱鸟系统的优化设计方案,采用雷达探测和激光驱赶的联动机制,结合激光定扫和巡航模式的双重驱赶策略,并进行能源优化设计,在某线路进行了试点和应用。研究结果表明:经过多次扫描,雷达探测可准确的探测出飞鸟目标,不受树木等干扰的影响;鸟害高发期,鸟类月活动和涉鸟故障次数明显下降。该方法驱鸟范围广,驱鸟效果持久,为配电线路涉鸟故障防治提供了重要的依据。
李炼炼 +5 more
doaj
The Problem With Problem Load: Reconceptualizing Load in the Multiple Streams Framework
Review of Policy Research, Volume 43, Issue 6, November 2026.ABSTRACT What happens when policymaking systems buckle under pressure, disrupting consensus and stalling decision‐making? Drawing on the Multiple Streams Framework, we show that the existing concept capturing this stress, Problem Load, has been both misinterpreted and overstretched.
Dana A. Dolan, Nikolaos Zahariadis
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Surface‐enhanced Raman scattering (SERS) has emerged as a highly sensitive and specific technique for tumor imaging, owing to its narrow spectral features, resistance to photobleaching, and capability for multiplexed detection. However, its clinical translation remains limited by poor tissue penetration and the absence of intrinsic anatomical ...
Xinyu Miao +7 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Advanced metallic glasses, leveraging their ultrahigh strength, excellent corrosion resistance, superior soft magnetic properties and good biocompatibility, have gradually become indispensable strategic cornerstones in critical fields such as aerospace, electronic information and energy power. This unique combination of properties enables them
Yizhou Liu +11 more
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Kongjian kexue xuebao宜居带行星探测研究是近年系外行星研究的热点领域之一, 探测太阳系附近的宜居行星对研究生命起源等具有重要意义, 成为系外行星探测的重要内容. 天基分布式合成孔径技术作为系外宜居行星探测的重要手段, 已经成为目前前沿光学技术研究的热点方向, 但是仍有诸多技术问题需解决. 本文从宜居行星搜寻计划的需求出发, 根据以迈克尔逊干涉成像为基础的天基分布式合成孔径系统技术原理, 介绍了国内外典型分布式合成孔径系统的技术发展, 重点分析了实现天基分布式干涉成像所需采用的控制系统和技术, 并阐述了解决高精度空间测距 ...
王 小勇 +3 more
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Functional Ecology, Volume 40, Issue 8, Page 2617-2627, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Root activity creates unique microbial hotspots in the rhizosphere by influencing the metabolic activities of surrounding soil microorganisms, profoundly regulating the dynamics of soil organic carbon (SOC). However, how root economic strategies affect the formation and
Qiyu Tan +8 more
wiley +1 more source
利用主-被动源面波联合探测郯庐断裂带内安丘—莒县断裂的浅部构造特征
Dizhen xuebao郯庐断裂带安丘—莒县断裂（编号F5）为全新世活动断裂，本文通过主-被动源面波联合勘探技术，以同排列方式采集主、被动源面波信号，利用叠加频散能量谱拓宽面波观测频带，结合遗传算法反演获取探测区域内的二维 S 波速度结构，进而探究该断裂的浅部构造特征。结果表明：探测区地壳介质横向非均匀性显著，S 波速度结构呈现明显分段特征，在测线110，160和640 m处分别识别出断点F5-1-1，F5-1及F5-2。其中F5-1和F5-2为F5 断裂的两条边界断裂，呈相向倾斜的断陷构造形态，破碎带宽度达 330 m。此外，
Yunze Liu +6 more
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