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论星系盘上密度波的传播与演化——Ⅱ.薄过渡层近似理论 [PDF]
, 1986 本文提出了一种波子不稳定演化过程的简化理论——薄过渡层近似,并且把这一理论得出的结果与G ...
徐建军
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, 2004 随着科学技术的迅速发展,近代工程设计所面临的任务更加复杂,解决问题的手段也更加先进。量纲分析是解决工程技术问题的重要手段之一,这是因为:(1)借助于量纲分析,当存在着多种影响因素的情况下,往往能够分辨出哪些因素是重要的,因而其他因素在设计中可以不加考虑。(2)量纲分析是建立相似律的基本方法,而相似律既是设计模型试验的理论依据,又是整理试验数据,推广试验结果应用范围所必须遵循的原则。本篇从量纲分析出发,给出一般的相似原理和模化原则 ...
郑哲敏, 谈庆明, 王补宣
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, 1985 本文从三个基本假设出发,提出了两相流的相弛豫理论.对气体-固体微粒两相系,从两相系Boltzmann运动论方程组出发,推导了相弛豫理论的基本方程组;并讨论了基本方程组的性质以及求解方法。分析计算了激波在气体-固体微粒混合物中传播的例子,阐明了强激波弛豫不符合标准指数弛豫律,而是一种动力学弛豫律 ...
高智
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Beyond Evidence: How Framing Shapes Public Health Policies During Health Crises
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Does the level of evidence that accompanies policy action depend on how a problem is framed, and on who frames it? This article examines these questions in the context of health crises. Bridging sociological and equivalence framing theories, it treats frames as preexisting interpretive schemes shared within communities of actors, whose ...
Antoine Claude Lemor, Eric Montpetit
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Identical Platform, Divergent Publics: Sweden and Finland During the 2022 NATO Crisis
Policy &Internet, Volume 18, Issue 3, September 2026.ABSTRACT Digital platforms are often theorized as universal drivers of political polarization, yet empirical patterns remain inconsistent across countries. Leveraging the natural‐experiment logic of Sweden's and Finland's simultaneous 2022 NATO applications and the NATO–Turkey diplomatic crisis, this study examines how national political cultures ...
Selcen Ozturkcan
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Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Constructed value of information (CVoI) is an expert elicitation decision‐analytic tool used to prioritize sources of uncertainty based on their potential to improve decision outcomes if resolved. Despite increased application of CVoI, the robustness of CVoI prioritization of sources of uncertainty relative to differences in expert elicitation
Kristin P. Davis +7 more
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, 1985 根据对爆破作用机理的理解和相似律基本原理,分析了爆破相似性问题;文中给出了几何相似的条件,并在几何相似的条件下分析了爆破中的若干问题;文中还讨论了介质的初始结构、破坏的表面能、时效 ...
许连坡
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Imagined Integration: The Logics of Japanese Immigrant Integration Policy
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT As governments develop immigrant integration policies, they draw on and express conceptions about what successful integration looks like—what we call “imagined integration.” Yet this imagination likely displays variation that matters for implementation: integration policymaking is increasingly multilevel as it involves subnational layers of ...
Mariri Niino, William L. Allen
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Time's Sentimental Tale: Operationalizing Plot Within the Narrative Policy Framework
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT The Narrative Policy Framework (NPF) has proven to be a successful analytical tool for examining the role of narratives within the policy process; however, the analysis of plot is still understudied. This gap persists due to difficulty in developing valid and reliable measures of plot and a lack of plot operationalizations using longitudinal ...
Rachel McGovern +4 more
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, 2006 本文从量纲分析、控制方程分析的角度分析了在动载下桶基响应的离心机模拟中的各种时间尺度。提出了砂土地基中惯性和渗流相似比尺冲突处理的办法,即不换材料,但是通过理论修正 ...
王淑云, 鲁晓兵, 张旭辉
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