Results 41 to 50 of about 2,162,136 (153)

Neutral interactions among non‐native plants are common

open access: yesNew Phytologist, Volume 252, Issue 1, Page 292-309, October 2026.
Global distribution of studies and overall effect of co‐invasion for all metrics of non‐native plant performance combined. Summary Globalization has accelerated the establishment of non‐native plant species, increasing the prevalence of multispecies co‐invasions; yet interactions among co‐invaders remain poorly understood.
Feng He   +7 more
wiley   +1 more source

反复自然流产与封闭抗体相关性的Meta分析

open access: yesZhongguo shiyan zhenduanxue, 2017
目的采用Meta分析方法评价封闭抗体与反复自然流产的相关性。方法通过计算机检索中国知网、万方、维普和Medline数据库,收集1994年4月到2016年8月中国公开发表的所有关于封闭抗体与反复自然流产相关性的病例-对照研究,根据纳入和排除标准筛选文献,提取资料和质量评价,以合并比值比(odds ratio,OR)及其95%CI为效应指标,运用STATA12.0软件,进行Meta分析。结果经严格筛选后共纳入13篇文献,合计反复自然流产组5364例,对照组4774例。经Meta回归分析显示 ...
石瑛   +5 more
doaj  

Regulating Reality: Exploring Synthetic Media Through Multistakeholder AI Governance

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT Artificial intelligence's integration into daily life has brought with it a reckoning on the role such technology plays in society and the varied stakeholders who should shape its governance. This is particularly relevant for AI‐generated, or synthetic, media, an emergent visual technology impacting perceptions of media as records of reality ...
Claire R. Leibowicz
wiley   +1 more source

Digital Futures Between Participatory Digital Democracy and Participatory Digital Fascism

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT This paper explores one of the defining political questions of the twenty‐first century: will digital technologies strengthen democracy or accelerate new forms of authoritarianism and fascism? Against the backdrop of platform capitalism, AI‐driven communication, surveillance infrastructures, disinformation and democratic crisis, the study asks
Christian Fuchs   +2 more
wiley   +1 more source

毛细管色谱切割-反吹法归一化分析汽油中芳烃

open access: yes, 2002
发展了一种毛细管色谱切割-反吹方法分析汽油中的芳烃。利用OV-2330强极性毛细管预柱将芳烃保留至n-C10之后,并反吹到非极性毛细管柱中按沸点详细分离分析。从预柱先流出的组伊从分析柱流出的组分都先后进入同一检测器中,因此可用响应因子校正的归一化方法定量分析汽油中的芳烃。该方法在15min内完成汽油中苯至C10芳烃的分析,结果的重复精度误差≤3%(RSD),切割误差±5s时对分析结果的影响≤4%(RSD ...
王涵文, 苗虹, 庄志洪, 关亚风
core   +1 more source

家庭結構對子女學校中輟行為的影響:一個後設分析研究 Disentangle the Effects of Family Structure on Kids Dropping out of School – A Meta-Analytical Study

open access: yes臺灣教育社會學研究, 2009
本研究採用後設分析的方法,試圖回答「家庭結構在子女中途輟學歷程中是否扮演了重要而獨特的角色?」此一問題。搜尋了多個國內外期刊論文索引資料庫後,我們共計蒐集了41篇採用邏輯迴歸方法分析中輟預測變項的研究,並登錄了71個模型分析結果,再就其中14個獨立的資料源(包含超過343,789名獨立樣本)所得到的15個分析結果進行後設分析。研究結果顯示,家庭結構對於中輟的影響,並非來自社經地位變項的外溢效果,而是有其獨特的影響力。此外,家庭結構對於中輟的影響似乎也非由學童學業成就所中介。研究者認為 ...
章勝傑 Simon Chang   +1 more
doaj  

Meta-analysis of alprostadil plus Shenkang Injection in the treatment of chronic kidney disease in elders

open access: yesLinchuang shenzangbing zazhi, 2021
目的评价前列地尔联合肾康注射液治疗老年慢性肾脏病的有效性。方法检索维普、知网、万方数据库、SinoMed中国生物医学文献数据库、PubMed、Web of Science、EMBASE中与前列地尔、肾康注射液、老年慢性肾脏病相关的随机对照试验,检索时限均从建库至2021年2月1日。由两名研究者独立进行文献筛选、数据提取、纳入文献质量评价。使用stata12.1软件利用筛选出的数据进行Meta分析。结果我们检索出10项研究共768例患者,Meta分析结果显示 ...
Dai Ting   +3 more
doaj  

关于ICP的几点非热平衡性质的讨论

open access: yes, 1989
本文通过对电感耦合等离子体热导系数计算结果的分析,得知电感耦合等离子体中的温度梯度能引起等离子体内部每平方厘米几十瓦的热流。对各种温度的计算表明,电子温度为10000°K时,离子温度和原子温度约9000°K。对高能电子密度,计算结果的分析表明,分析等离子体区的高能电子密度大大偏离了Moxwel分布 ...
刘克玲, 黄矛
core  

血清铜与复发性口腔溃疡关系的 Meta 分析

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1998
目的: 探讨血清铜与复发性口腔溃疡的关系。方法: 采用 Meta 分析对所收集的国内相关研究文献进行综合的 定性和定量分析。结果: 复发性口腔溃疡组的血清铜浓度与正常组相比具有显著性差异 ...
王安训 丁学强 许鸿生
doaj  

Effects of exercise interventions on fatigue of hematopoietic stem cell transplantation patients: A Meta-analysis (运动干预对造血干细胞移植患者疲乏影响的Meta分析)

open access: yes中西医结合护理
Objective To systematically evaluate the effect of exercise interventions on the fatigue for patients with Hematopoietic Stem Cell Transplantation (HSCT) through a meta-analysis. Methods Randomized controlled trials on exercise intervention in patients
ZHOU Min (周敏)   +3 more
doaj   +1 more source

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