Results 21 to 30 of about 30,229 (203)
Jianzhu Gangjiegou Jinzhan, 2020 回顾总结了近年来高温下梁柱端板式连接节点力学性能相关的研究成果。针对三类常用的端板连接形式:外伸式端板、齐平式端板以及内缩式端板连接进行了细致讨论。同时,从试验研究、有限元分析以及组件法的高温运用等方面着手归纳了相应研究成果。首先,对近年来为数不多的端板式节点高温试验进行了回顾,包括针对孤立节点的高温试验以及针对子结构的高温试验。随后,对有限元方法和推广应用的组件法这两种理论研究方法进行了详细的归纳总结,细致讨论了各组件模型实际运用中的优势以及存在的不足。最后,根据已有的研究成果 ...
李炎地, 赵金城
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Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
wiley +1 more source
Jixie chuandong, 2021 对少齿差直线共轭齿廓进行了研究。根据齿轮啮合原理及齿廓法线法，推导了直线共轭齿廓的参数方程，并详述了啮合线和重合度的求解方式及齿侧间隙的处理方法；讨论了齿廓干涉的验证原理，提出基于面积量的齿廓旋轮线干涉验证方法。设计制造了以少齿差直线共轭齿廓为主要传动结构的减速器样机，并进行了效率对比试验和温升试验。研究结果可为少齿差齿线共轭齿廓在传动领域的研究提供借鉴和参考。
崔建昆 +4 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Acknowledging the limitations of existing measurement instruments in adequately capturing the distinct cognitive processes (e.g., form‐focused vs. meaning‐focused) involved in informal digital learning of English (IDLE), this paper asserts a pressing need to develop and validate robust instruments that measure form‐focused and meaning‐focused ...
Minlin Zou +3 more
wiley +1 more source
Mobilizing fears? How proximity to deportation threat affects political participation
Policy Studies Journal, EarlyView.Abstract Policies often provoke political changes, which are collectively known as feedback effects. Studying state variation in immigration policy, scholars have shown that proximity to hostile policy tends to mobilize Latinos. But not every member of the Latino community is likely to perceive the same proximity to anti‐immigrant policies.
Mackenzie Israel‐Trummel +2 more
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Basic income trials and the politics of scale: A research agenda
Policy Studies Journal, EarlyView.Abstract The growing popularity of basic income has led to extensive trials of the policy in numerous settings across the world. However, analysis of the politics of basic income, and in particular the political dynamics preceding and resulting from trial programs, lags. In response, we propose a research agenda that uses political scale to investigate
Jurgen De Wispelaere +2 more
wiley +1 more source
Jixie chuandong, 1988 四、研合剂的实验室研究从85年初开始,在北京钢铁学院机械零件试验室内对研合剂进行了大量的试验研究和试用.整个研究所包含的内容和目的如下;1、确立合理的符合使用要求的研合剂的成分配比;即寻求在对研跑合过程中既不会产生胶合,又能快速达到表面粗糙度要求的研合剂。2、研究在不同载荷下的对研跑合效果,以解决在满载下快速跑合的问题.3、研究速度对研合的影响 ...
傅德明
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临床试验阴性结果应考虑的问题 Considerations for Clinical Trial Negative Results
Zhongguo cuzhong zazhi, 2023 临床试验是评估新药或新疗法有效性和安全性最有效的方法，可以提供高质量的循证医学证据。近年来全球的临床试验数量逐渐增加，试验结果为阴性十分常见。当临床试验的主要结果为阴性时，并不一定就意味着研究的失败，研究者还需要多方考虑以便从中找到潜在益处的线索。本文阐述了临床试验主要结局为阴性时需要考虑的12个要点，并以吲哚布芬对比阿司匹林治疗急性缺血性卒中（indobufen versus aspirin in acute ischemic stroke，INSURE）研究为例进行讨论 ...
王梦星，潘岳松，刘丹丹，金奥铭
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Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19
Policy Studies Journal, EarlyView.Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2003 著名的英国Cardington大尺度结构抗火试验掀起了一股对火灾中钠结构工作性能研究的热潮。特别是最近的研究针对整体的结构系统,而不是静定的独立的构件;集中研究大挠度情况,而不是小挠度情况。本文给出了这两个方面的先进研究的定性描述。这些描述可用来评估当前试验研究得出的钢结构抗火性能,以及未来试验研究的领域。对这两个方面的透彻理解是很重要的,它能提供对复杂的钢结构抗火性能的深入的本质理解。试验数据也是必需的,它可以验证不同的数值预测,这种数值预测正广泛地提供数据 ...
王永昌
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