Results 41 to 50 of about 731,336 (171)

风沙二相流运动特点的分析

, 1996
该文以平坦沙漠上定常、充分发展的风沙二相流为例分析了颗粒的跃移运动.该文还用拟流体观点分析了固相运动的特点,并指出,速度脉动既不属于热运动,又不是湍流脉动,它是一种新形式的无规则运动,是颗粒跃移运动在连续介质模型中的反映,对风沙流的结构和流场中的细致平衡有很大影响.最后讨论了这种新型脉动产生的剪应力 ...
刘大有, 董飞, 贺大良
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Vocabulary Strategy Instruction in the Argentine EFL Context: Teachers’ Perspectives and Practices

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Despite extensive research on vocabulary strategy instruction (VSI), little has been known about teachers’ perspectives on how it is understood and implemented in practice. This study investigated Argentinian EFL teachers’ priorities in vocabulary instruction, their perceived knowledge of learner strategies for spoken vocabulary, and factors ...
Isobel Kai‐Hui Wang, Andrew D. Cohen
wiley   +1 more source

关于2-距离空间中非线性压缩映象的不动点定理

四川大学学报. 自然科学版, 1984
文[1—3]的作者在不同的假设下讨论过2-距离空间中压缩型映象的不动点定理,文[4]的作者给出了几个新的不动点定理。本文目的是把前述主要结果推广到更一般情形。
王永义
doaj  

转基因动物整合位点的研究进展

, 2003
转基因动物整合位点克隆及相关序列特征研究是探索外源基因整合机制和整合稳定性的重要手段。转基因整合位点序列的克隆方法主要有:个体基因组文库筛选法、反向PCR法、热不对称交互式PCR法和质粒回收法。4种方法各有优缺点,可根据不同条件选用。克隆到的整合位点序列表明 ...
吴波,朱作言
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k集压缩映射的非零不动点

四川大学学报. 自然科学版, 1984
本文应用K集压缩映射不动点指数理论(见[1])讨论了K集压缩映射的非零不动点和固有值的存在性。本文结果是[3]中某些结果的改进和推广。
严家鹤, 张庆雍
doaj  

How Do Policy Narratives Evoke Emotions? An Appraisal‐Theoretic Approach

Policy Studies Journal, EarlyView.
ABSTRACT Research on policy narratives acknowledges the crucial role that emotions play within communication and sense‐making. Especially the Narrative Policy Framework (NPF) has placed emotion at the center of attention and stressed that affect‐imbued stories are key for how individuals make sense of the world and navigate through the policy process ...
Sonja Blum, Johanna Kuhlmann, Nora Habelitz   +2 more
wiley   +1 more source

Running With Scissors? Integrating GPT Models Into Public Policy Research

Policy Studies Journal, EarlyView.
ABSTRACT The integration of large language models (LLMs) into public policy research presents both exciting opportunities and methodological challenges. This research note explores how OpenAI's GPT can be used to semi‐automate the annotation of legislative testimony within the Advocacy Coalition Framework, focusing on emotion‐belief dyads.
Giulia Mariani, Allegra H. Fullerton
wiley   +1 more source

集值映象不动点的一个单调原理

四川大学学报. 自然科学版, 2003
建立了集值映象不动点的一个单调原理,所得结果改进和推广了一些已知的结果.同时,在更广泛的情形下,给出了关于Reich不动点问题的一个肯定性回答.
吴定平
doaj  

Policy Narratives and Empowerment: Implementation of the Swedish National Violence Prevention Program

Policy Studies Journal, Volume 54, Issue 3, August 2026.
ABSTRACT As the Narrative Policy Framework (NPF) begins to unpack issues of power and narratives, the main focus has been on power‐over and domination rather than more transformative notions of power‐to and empowerment. This article draws on insights from gender and policy studies and suggests that the NPF benefits from adopting a multifaceted notion ...
Hilda Broqvist
wiley   +1 more source

ELECTRONIC IGNITOR FOR MOTOR VEHICLE

, 1992
一种机动车电子点火装置,它由延时振荡器,正或门触发线路、脉冲反馈两级放大器。复合开关放大器及转换开关K组成,其特点是采用延时振荡器,解决了低速时,大电流长时间烧管子的问题,使电子点火器可靠性增强,并采用脉冲反馈两级放大及复合开关放大使电子点火器开关特性增强。点火线圈的磁通变化率加大、感应高压增高,火花能量强从而节能效益好,且不丢火熄火。该装置结构简单。开关特性好、稳定可靠、节能效益好、不烧白金触点 ...
林士昌
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