Results 31 to 40 of about 22,433 (139)

The Emotional Valence Paradox in Social media: A Computational Linguistic Analysis of How Sentiment, Emotion, and Content Domain Predict Social Comparisons on Rednote

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT This computational linguistic study analyzes 8743 Rednote posts to examine how sentiment, emotion, and content domain collectively shape social comparison dynamics on social media. We identify four key findings: (1) an emotional gradient, where upward comparison content exhibits the highest sentiment scores and downward comparison the lowest; (
Michelle Mingyue Gu   +7 more
wiley   +1 more source

自复位钢桁框的强度折减系数概率模型

open access: yesJianzhu Gangjiegou Jinzhan
为提高钢桁框体系的抗震可恢复性,提出了自复位钢桁框体系的概念,研究了其在脉冲地震下的强度折减系数。以等效单自由度体系表征具有三折线滞回特征的钢桁框体系,选取182条脉冲型地震动对等效单自由度体系进行非线性动力分析,得到包含6 022万个强度折减系数(R)的数据库,揭示了不同滞回参数和脉冲型地震动对强度折减系数的影响规律。此外,借助BP神经网络拟合强度折减系数在地震下的对数正态分布模型参数,并建立了基于概率的钢桁框体系强度折减系数模型。结果表明提出的模型具有较高的准确性。
刘艳芝, 蓝雅云, 颜阳, 柯珂
doaj   +2 more sources

分子数对交联环氧树脂体系特性影响的分子动力学模拟

open access: yesGaoya dianqi, 2018
分子模拟技术因能够揭示聚合物材料宏观性能与微观结构之间的关联,故被广泛应用于聚合物材料的性能研究。然而在分子模拟研究中,关于分子数对交联环氧树脂体系特性影响的研究却少有涉及。体系中分子数目的合理选择对交联分子模型的合理、准确构建均有一定的影响,从而会影响环氧树脂体系的特性。为此从分子模拟角度出发,基于COMPASS分子力场,采用Material Studio软件建立了不同分子数(DGEBA分子条数分别为24、32、40和48)的交联环氧树脂体系模型,用于分析分子数对交联环氧树脂体系特性的影响 ...
刘利珍   +5 more
doaj  

Perceptions and Acceptance of Generative Artificial Intelligence Influencing Chinese EFL Learners’ Engagement in Informal Digital Learning of English: Mediating Roles of Self‐Efficacy and Motivation

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Generative artificial intelligence (GenAI) has emerged as a powerful tool in the Informal Digital Learning of English (IDLE) environment, offering personalized, interactive, and innovative language learning experiences that may enhance learning engagement.
Jin Liu, Meilu Liu, Yuan Yao, Dechao Li
wiley   +1 more source

建立RT-ARMS-qPCR系统定量测定含A1555G突变的线粒体DNA拷贝数

open access: yesZhongguo shiyan zhenduanxue, 2009
目的建立RT-ARMS-qPCR(real time-amplification refractory mutation system-quantitative PCR)系统定量测定含线粒体DNA(mitochondrial DNA,mtDNA)A1555G位点突变的片段的拷贝数,为阐明线粒体耳聋临床表型多样性的分子生物学基础奠定基础。方法根据ARMS的基本原理设计引物,在引物3’端插入错配碱基AC建立RT-ARMS-qPCR系统,优化定量PCR体系,并进行方法学评价 ...
程祖建   +4 more
doaj  

铝合金遮阳技术的应用与发展趋势 [PDF]

open access: yes, 2006
论述了铝合金遮阳的一般构造形式、荷载取值及结构计算方法、叶片制造工艺及表面处理技术。给出了一种智能控制遮阳系统方框图。同时对铝合金遮阳的发展趋势进行讨论。This paper introduces general structure type, load value taken and structure calculation method, fin manufacture and finishing technics of aluminum alloy sun shading system. The
方立平, 黄元庆
core  

Structural lobbying power? An exploration of patterns in preference attainment at varying levels of lobbying activity

open access: yesPolicy Studies Journal, EarlyView.
Abstract Studies of lobbying typically look at the extent to which interest groups realize political goals on issues they actively lobby for. Little is known, however, about the extent to which interest groups attain their political goals without making an active lobbying effort.
Marcel Hanegraaff   +2 more
wiley   +1 more source

基于时间序列模型的变压器油中溶解气体预测

open access: yesGaoya dianqi, 2019
变压器作为电力系统的核心设备,其安全运行是电力系统稳定可靠的基础。根据在线监测系统提供的油中溶解气体含量历史数据,预测未来气体体积分数及其发展趋势,是DGA故障预测的关键,也是在线监测的必要补充和提前预警变压器故障的重要手段。现有的预测算法存在着模型泛化性差和没有考虑时间序列模型等问题。为提高预测能力,文中首先介绍了非时序有监督学习和时间序列模型关键技术及其在变压器油中溶解气体体积分数预测的应用;然后搜集和发布了一个大规模数据样本,为算法提供了一个较为全面的验证集,提高模型的泛化性 ...
刘慧鑫   +4 more
doaj  

ARCHITECTURAL DESIGN FOCUSED ON CLIMATE IN SOUTHERN FUJIAN [PDF]

open access: yes, 2010
建筑是人类适应自然的庇护所,是应对气候的产物,也应是和人类一起共融于自然的。但是近些年来,伴随人类社会的进步,也带来了很多环境危机,现在人类对地球造成的冲击是史无前例的。这些问题是人口膨胀、消耗能量、技术质量三者乘积得共同产物。而建筑能耗占了所有能耗的一半,因此重新思考建筑与自然的关系、研究建筑应对气候的设计方法,走可持续发展的道路对当今世界是有重要意义的。 国家对海西建设的关注,势必会带动闽南地区的发展,带来大量的建设。因此,针对闽南地区特殊湿热气候环境,研究应对气候的建筑设计策略也有着重要的现实意义。
王凯
core  

Partisanship, Deservingness, and the Attitudinal Policy Feedback Process for Social Policy

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT In an era of identity‐based partisan polarization, we examine whether social policies can still generate positive attitudinal feedback among beneficiaries. Drawing on nationally representative survey data, we demonstrate that partisanship conditions the policy feedback process through divergent perceptions of group deservingness.
Chris Faricy, Christopher Ellis
wiley   +1 more source

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