Results 81 to 90 of about 28,511 (200)
Jianzhu Gangjiegou Jinzhan, 2018 大跨度空间结构具有杆件众多、高次超静定、温度效应复杂等特点,为研究日照下空间结构的温度效应大小,设计制作了等边三角形平板网架模型进行温度试验。以实测数据为依据,研究网架模型温度与应力的关系以及温度变化所产生的温度应力、变形大小。结果表明,日照下网架模型温度与温度应力相关性明显,网架下弦温度应力最大,最大轴向应力可达64.2MPa,最大弯曲应力可达15.85MPa;上弦温度应力最小,最大轴向应力只有18.8MPa;网架下弦靠近支座节点变形最大,最大值可达0.5mm ...
李景芳 +4 more
doaj
Accountability in Government Use of AI: Citizen Concerns and Preferences
Public Administration, EarlyView.ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley +1 more source
Three-dimensional finite element stress analysis of surface-mounted inlays in repairing pulp-penetrating non-carious cervical lesion of maxillary first premolar. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Ma D, Qian J.
europepmc +1 more source
Narrative power in the narrative policy framework
Policy Studies Journal, EarlyView.Abstract The Narrative Policy Framework lacks clear and empirical explanations of power. Yet, the study of narratives is inherently the study of power in shaping policy outputs and decisions. We develop a conceptual model positing that expressions of power (power to, with, and over) may be discovered in narrative constructs (e.g., narrative structure ...
Elizabeth A. Shanahan +8 more
wiley +1 more source
Shiyou jixie, 2011 在储气库技术研究中，对套管柱的受力情况进行研究十分重要。利用解析法建立地下储气库套管柱力学模型，分别分析套管柱在内压及外挤载荷、温度载荷和轴向载荷作用下的环向、轴向和径向应力，将各种载荷引起的应力及位移叠加，计算套管柱的受力情况，并通过实例来分析水泥环特性对套管受力及水泥环三向应力的影响。结果表明，套管在注气工况下受力较大，套管应力随水泥环弹性模量的增大而逐渐减小，当水泥环弹性模量增大到一定值时套管应力减小不明显，而水泥环的受力却不断增大；水泥环弹性模量太大时会增加水泥环的各向应力。
张丹, 陈娟, 张宏, 冀亚峰
doaj
Legislating Uncertainty: Election Policies and the Amplification of Misinformation
Policy Studies Journal, EarlyView.ABSTRACT Can state election policies affect the spread of misinformation? This paper studies the role played by ballot processing policies, which determine when ballots can be examined and organized, in the online spread of political misinformation. We present evidence from the 2020 U.S.
Morgan Wack +5 more
wiley +1 more source
Policy Studies Journal, EarlyView.ABSTRACT What are the conditions under which business corporations expand their institutional power? This paper argues that institutional power is affected by the architecture of the “acquisition regime”—the set of formal (and informal) rules that govern how states purchase public services.
Reut Marciano, Shir Gal
wiley +1 more source
Topics as Outcomes: Modeling the Influence of Intergovernmental Grants on Policy Diffusion
Policy Studies Journal, EarlyView.ABSTRACT Intergovernmental grants stimulate the diffusion of policy reforms, as the federal government provides states with a financial incentive to adopt policies aligned with federal priorities. Less is known about the extent to which these grants also stimulate horizontal diffusion across states.
NaLette Brodnax, Sarah James
wiley +1 more source
Shiyou jixie, 2012 为了了解螺旋弯曲状态下管柱的应力分布规律，根据管柱螺旋弯曲的特点，利用弹簧理论，结合螺旋弯曲管柱力学分析成果，导出了螺旋弯曲状态下管柱内、外侧的第四相当应力计算公式，弥补了传统管柱力学分析的不足，提高了受压弯曲管柱强度校核的针对性与准确性。分析结果表明，在轴向压力作用下，弯曲管柱内侧的最大相当应力恒大于外侧，并且随着轴向压力的增大，管柱内侧最大相当应力线性增大。因此，对于受压弯曲管柱，应以管柱内壁为应力危险点校核其强度。
窦益华, 于洋, 夏辉, 曹银萍
doaj
Policy Studies Journal, EarlyView.ABSTRACT Why did Australia go from the White Australia Policy, which excluded non‐whites, to institutionalizing multiculturalism policy in the 1970s? This question defies traditional political ideologies of the major political parties, which had long supported the White Australia Policy. This article is a rare empirical demonstration of the Five‐Thread
Julius C. S. Mok
wiley +1 more source