Results 61 to 70 of about 14,851 (148)
Jianzhu Gangjiegou Jinzhan为探究薄钢板机械咬合螺栓抗剪连接的受力性能，设计了12个具有不同垫圈形状和预拉力的机械咬合螺栓连接试件和普通螺栓连接试件，并开展了受剪破坏试验。试验结果表明机械咬合螺栓连接试件的薄钢板在咬合部位发生受拉破坏，而普通螺栓连接试件的薄钢板出现孔壁承压破坏，且机械咬合螺栓连接的受剪承载力显著高于普通螺栓连接的受剪承载力。分别建立了机械咬合螺栓连接和普通螺栓连接的精细有限元模型，根据受剪试验结果验证了模型的准确性，进一步探究了垫圈直径、螺栓直径、钢板厚度和咬合深度对机械咬合螺栓连接受剪承载力的影响规律 ...
袁焕鑫, 邱鑫, 杜新喜
doaj
Coalition Opportunity Structures and Advocacy Coordination in Consensus and Majoritarian Democracies
Policy Studies Journal, EarlyView.ABSTRACT Research on advocacy coalitions suggests that belief homophily—the tendency of actors to coordinate based on shared policy beliefs—drives coalition formation. However, coalition opportunity structures, which are shaped by institutional contexts, may influence the extent to which belief homophily matters.
Keiichi Satoh +7 more
wiley +1 more source
Emotion and the Advocacy Coalition Framework: An Affective Dynamics Perspective
Policy Studies Journal, EarlyView.ABSTRACT Despite extensive evidence that emotion and cognition are deeply intertwined, the Advocacy Coalition Framework (ACF) lacks an analytically independent emotional mechanism in its causal architecture—an omission that may be particularly consequential in policy subsystems structured around morally charged, identity‐laden policy disputes.
Moshe Maor
wiley +1 more source
Review of Policy Research, EarlyView.ABSTRACT Using data from a long‐term survey of senior civil servants (1970–2021), this study investigates the declining share of jurists in federal ministerial departments in Germany. The mechanisms driving this trend and its subsequent effects are discussed from an organizational perspective, highlighting the influence of environmental pressure and ...
Marian Döhler
wiley +1 more source
Non‐Members in a Tight Spot: How Norway Navigated Autonomy in EU Pandemic Management
Review of Policy Research, EarlyView.ABSTRACT This study offers new insights into how closely integrated non‐member states navigate tensions between autonomy and dependence when urgent policy responses are required within complex supranational frameworks. It does so by exploring how these non‐members exercise their “wriggle room”—a tailored sub‐category of the broader concept of autonomy ...
Sjoerd Alexander de Winter
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2013 【目的】：人类辅助生殖技术中，低受精率的发生机理及辅助激活提高受精率的安全性尚不清楚，缺乏激活力减弱的精子模型是其中一个主要研究障碍。本研究拟探索减弱小鼠精子激活力的新技术。【方法】 首先，分别对精子进行化学破膜、机械脱尾及其联合操作于３７ ℃ 孵育１２ ｈ，比较各操作对显微授精后的受精率的影响；然后进一步结合时间因素，观察处理时间与精子激活力减弱程度的联系。同时，对操作后的胚胎早期发育的影响也进行了相应观察。【结果】 ①化学破膜法与机械脱尾法对精子破膜并温育后，均能有效降低精子受精率 ...
doaj
The Role of Technology Standards in Strategic Hedging
Asian Politics &Policy, Volume 18, Issue 2, April 2026.ABSTRACT This article argues that technology standards provide Southeast Asian states with a distinct mechanism for hedging amid intensifying US–China technological rivalry. Traditional hedging strategies emphasizing economic engagement without political alignment are increasingly constrained by the weaponization of technological interdependence ...
Darren J. Lim, Anthea Roberts
wiley +1 more source
SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis
New Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue +3 more
wiley +1 more source
Gaoya dianqi, 2016 基于新一代开关柜研发需要,依据当前接地开关现状及存在的问题,进行了插入式接地开关的自力型触头的初步设计;利用理论推导和有限元分析对设计的触头进行设计校核,并制造样机进行试验验证。试验结果表明:设计的触头满足机械寿命以及短时和峰值耐受电流试验的要求,验证了该自力型触头设计方法的合理性。
贾耿锋 +4 more
doaj
, 2012 以国际地磁参考场模型IGRF11为基础,推导出地球磁场梯度分布公式,并对近地空间磁场分布特点进行了分析。由基本磁力学可知,带强磁体的航天器在地磁环境中不仅受到磁力矩作用,还将受到与地磁梯度相关的磁力的影响。根据地磁环境下的磁体受力机理,文章讨论了以弱磁力改变轨道倾角的方法 ...
刘开磊 +4 more
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