Results 11 to 20 of about 97,785 (157)

Love in the time of COVID‐19: A systematic mapping review of empirical research on romantic relationships one year into the COVID‐19 pandemic

open access: yesFamily Process, Volume 61, Issue 3, Page 1208-1228, September 2022., 2022
Abstract The COVID‐19 pandemic has affected nearly every area of daily life, including romantic relationships. With the pandemic still ongoing, this study reviewed the existing scholarly literature to document the status of empirical research on how COVID‐19 has affected couples during its first year.
Roi Estlein   +2 more
wiley   +1 more source

Key n‐Gram Extractions and Analyses of Different Registers Based on Attention Network

open access: yesJournal of Applied Mathematics, Volume 2021, Issue 1, 2021., 2021
Key n -gram extraction can be seen as extracting n‐grams which can distinguish different registers. Keyword (as n = 1, 1‐gram is the keyword) extraction models are generally carried out from two aspects, the feature extraction and the model design.
Haiyan Wu   +5 more
wiley   +1 more source

绝缘子表面灰密的测量影响因素分析

open access: yesDianci bileiqi, 2022
电力系统中一般采用等值盐密和等值灰密来描述绝缘子表面的染污程度。其中,等值盐密和等值灰密分别表征了绝缘子表面单位面积可溶性污秽和不可溶污秽的量。运行部门一般利用滤纸过滤称重的方法测量绝缘子的等值灰密,但由于缺乏细致的测量规范,等值灰密测量值有一定分散性。为了研究灰密测量的影响因素,笔者从滤纸烘干温度、烘干时间、滤纸饱和重量及冷却时间4个方面出发,研究了上述因素对滤纸质量法中滤纸干燥程度的影响,在此基础上,给出了灰密的测量程序。试验结果表明,滤纸烘干温度为110℃,烘干时间15 min的 ...
燕宝峰   +6 more
doaj  

外源添加物对土壤干缩裂缝特征的影响

open access: yesShuitu Baochi Xuebao, 2023
为研究外源添加物对土壤干缩裂缝特征的影响,选取水田、旱田、林地3种土地利用方式,添加生石灰(1 g/kg)、黄腐酸(10 g/kg)、鱼塘底泥(250 g/kg)、生物炭(15 g/kg)4种外源添加物,进行土壤干燥收缩试验。结果表明:除生石灰外,不同土壤外源添加物处理下各用地类型土壤干燥收缩裂缝特征变化趋势非常一致,裂缝面密度、长密度、平均宽度均呈现耕作层水田>旱田>林地、犁底层水田>林地>旱田。生石灰对土壤干燥收缩裂缝特征无显著影响;黄腐酸使土壤干缩裂缝面密度、裂缝平均宽度增加 ...
陈上茂   +6 more
doaj  

IMPLEMENTATION OF THE '数字素养 (SHÙZÌ SÙYǍNG)' INSTRUMENT TO MEASURE THE DIGITAL LITERACY LEVEL OF MANDARIN LANGUAGE EDUCATION STUDENTS

open access: yesJurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran
The current presence of the internet undeniably facilitates and accelerates individuals' ability to access and disseminate information, even leading to an information explosion. To manage this situation, digital competence is required to face the 6.0 era.
Aiga Ventivani   +3 more
openaire   +1 more source

Exploring pathophysiological insights to improve diagnostic utility of ultrasound markers for distinguishing placenta accreta spectrum from uterine‐scar dehiscence

open access: yesUltrasound in Obstetrics &Gynecology, Volume 65, Issue 1, Page 85-93, January 2025.
ABSTRACT Objective Accurate differentiation between placenta accreta spectrum (PAS) and uterine‐scar dehiscence with underlying non‐adherent placenta is often challenging, even for PAS experts, both prenatally and intraoperatively. We investigated the use of standardized two‐dimensional grayscale ultrasound and Doppler imaging markers in ...
T. Adu‐Bredu   +3 more
wiley   +1 more source

石灰石粉与不同矿物掺合料复掺对高强自密实混凝土性能的影响 [PDF]

open access: yes, 2018
基于混凝土的自密实性能和强度试验结果,研究了石灰石粉分别与粉煤灰、矿粉和硅灰3种不同矿物掺合料复掺组合对高强自密实混凝土性能的影响。结果表明:在合适的掺量范围和复配合比例条件下,将低活性的石灰石粉与高活性的硅灰复掺有很好的互补效应,对混凝土的自密实性能和强度产生了积极影响;石灰石粉与矿粉复掺不仅可以改善混凝土的自密实性能,同时也能满足高强要求。石灰石粉与硅灰、石灰石粉与矿粉复掺组合是制备高强自密实混凝土的有效技术手段。石灰石粉与粉煤灰复掺虽然显著提高了混凝土的自密实性能,但是不能满足高强要求,只能制备中、
罗德富, 李巧, 胡红梅, 高菲菲
core  

概率统计在绝缘子污闪风险性评估中的应用

open access: yesGaoya dianqi, 2009
笔者分析了灰密的概率密度分布,并推导出盐密与灰密的联合概率密度函数。在不考虑灰密和考虑灰密两种情况下,利用概率统计方法,推导出在恒定电压下,绝缘子的污闪概率计算方法,为评估线路可靠性、调度部门决策、绝缘子的维护以及新线路绝缘子的选型提供依据。
牛春节, 程养春
doaj  

晶圓片光阻劑塗抹厚度之灰預測研究 [PDF]

open access: yes, 2014
由於晶圓在塗抹光阻劑時,利用離心力對稱之特性將光阻劑塗抹其上,這往往對我們,難以去估測出光阻劑塗抹於晶圓上的膜厚。本文藉由灰預測理論,架構起晶圓在塗抹光阻劑時之灰色模型GMO. l) .以提供當塗抹光阻劑時,時間及轉速之決策參考。實驗擷取的數撮主要是利用離心力對稱特性,得出光阻劑塗抹晶國時的膜厚。在控制時間與轉速兩因子,分別來擷取光阻劑之平均膜厚。我們將得到的數據處理成有規則性、有條理性以用來架構灰色模型,並得出一組最佳化灰預測數據,以估測出光組劑之平均膜厚的差異 ...
楊智旭   +1 more
core  

污秽绝缘子在不同脉冲电压条件下的闪络特性研究

open access: yesGaoya dianqi, 2014
输电线路在污秽条件下的闪络(污闪)是威胁电力系统安全运行的主要事故。笔者以两片串的绝缘子短串为研究对象,通过对绝缘子两端施加0.5/5μs和2.6/50μs的冲击电压波形,研究了盐密、灰密污秽度对绝缘子闪络特性的影响,同时对波头时间不变,波尾时间对绝缘子闪络特性的影响进行了研究。结果表明,盐密对绝缘子闪络电压的影响大于灰密;当盐密、灰密值较低时,冲击电压波形对绝缘子串闪络电压影响不大;灰密值固定时,绝缘子闪络电压随着盐密值的增加而减小;而当盐密值固定时 ...
彭波   +6 more
doaj  

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