Results 21 to 30 of about 17,333 (123)

10kV系统中切除并联电容器时的重燃过电压研究

open access: yesGaoya dianqi, 2004
电力系统中使用真空断路器切除无功补偿用并联电容器时,容易产生重燃过电压,严重影响并联电容的安全运行。笔者对10kV系统中切除并联电容器时所产生的重燃过电压进行了模拟计算,着重分析了影响重燃过电压大小的因素,并研究了利用MOA对并联电容器进行过电压保护的效果。
杜斌   +4 more
doaj  

Comparing the Effects of Collaborative and Independent Writing on EFL Learners’ Individual Writing Performance: An Intervention Study

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Collaborative writing has attracted increasing attention in English as a Foreign Language (EFL) instruction due to its potential to enhance learners’ writing competence. However, few studies have examined the comparative effects of collaborative versus independent writing on EFL learners’ individual performance, especially in higher‐order ...
Ting Huang, Chenze Wu, Wenkang Zhang
wiley   +1 more source

紫色土崩解特性对容重和含水率的响应特征

open access: yesShuitu Baochi Xuebao, 2019
以紫色土为研究对象,通过室内重塑土试验,采用多元回归方程和曲面响应等分析方法,研究容重和含水率对紫色土崩解特性的影响。结果表明:(1)在相同容重下,崩解量随着含水率的增加而减小,不同含水率的土样崩解时间有所不同;土样完全崩解时间总体上随着含水率的增加而延长,且崩解量主要集中在崩解阶段前3 min。(2)在相同含水率下,崩解量随着容重的增加而减小,土样完全崩解时间总体上随容重的增大而延长,且崩解量主要集中在前4 min。(3)在相同容重和含水率下,土样崩解速率均随着容重和含水率的增大而减小;较之容重 ...
李敬王, 陈林, 史东梅, 张佳宝
doaj  

Co‐Teaching in a Virtual Intensive Study Language Programme: Insights From Team Ethnography

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT As virtual study abroad becomes an increasingly important form of international education, little is known about how transnational teaching is organised and sustained across institutions. Using activity theory as an analytical framework and team ethnography as methodology, this study examines a virtual intensive study (VIS) programme delivered
Zhu Hua   +7 more
wiley   +1 more source

English as a Lingua Franca‐Mediated Meaning‐Making and Intercultural Competence in TikTok Live–Based Language Learning

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT As digitally mediated communication increasingly shapes language learning beyond formal classrooms, social media platforms offer new possibilities for authentic, intercultural interaction. This qualitative study investigates how TikTok Live‐mediated interaction supports English as a lingua franca (ELF) use, meaning‐making, and intercultural ...
Wen‐Chi Vivian Wu   +2 more
wiley   +1 more source

次降雨后不同时段坡地表层土壤水分和容重的空间变异特征

open access: yesShuitu Baochi Xuebao, 2011
采用经典统计学方法,通过网格布点,研究黄土高原坡地表层土壤水分和容重在降雨后不同时段的空间变异特征。结果表明:(1)降雨后第1天,表层土壤水分和容重的变异程度分别为中等、弱变异性;在各坡向间土壤水分呈阴坡>阳坡>山脊的变化趋势,容重为阴坡>山脊>阳坡;(2)降雨后第20天,土壤水分和容重的变异程度均保持不变,但土壤水分在不同坡向间的数量特征发生改变(阴坡>山顶>阳坡),而容重的变化趋势保持不变;(3)表层土壤水分具有弱的时间稳定性,而容重的时间稳定性较强。(4)相关分析表明,降雨后第1天 ...
王云强, 张兴昌, 朱元骏, 曾辰
doaj  

Democratic Values in Citizen Participation: What Citizens Prioritize in Participation

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT Citizen participation is often initiated to strengthen democracy. While participatory innovations are typically assessed through normative frameworks emphasizing democratic values, little is known about which of these values are prioritized by citizens.
Take Sipma, Frank Hendriks
wiley   +1 more source

土壤容重和含水率对紫色土坡耕地耕层抗剪强度的影响

open access: yesShuitu Baochi Xuebao, 2020
土壤抗剪强度既可评价土壤侵蚀敏感性,也是反映耕层土壤耕作性能的重要参数。不同剪切方式下土壤抗剪强度指标存在一定差异,以紫色土坡耕地耕层土壤为研究对象,采用室内重塑土三轴及直剪试验方法,研究容重和含水率对紫色土坡耕地耕层土壤抗剪强度的影响,并分析了2种试验方法的差异性。结果表明:(1)紫色土坡耕地耕层土壤黏聚力(c)总体随容重(ρd)增大而增加,随含水率(w)增加而减小,三轴及直剪试验条件下黏聚力最大值均出现在容重1.4 g/cm3、含水率10%水平下,分别为32.33,21.78 kPa ...
张健乐   +4 more
doaj  

First, He Was Adam, and Then, She Was Eve

open access: yesSexuality, Gender &Policy, Volume 9, Issue 4, November 2026.
ABSTRACT Trans* is an umbrella term that is used to describe people who identify with a gender that is different from their assigned sex at birth. There has been a marked increase in young people presenting to child and adolescent mental health services due to a lack of specialist gender clinics in the United Kingdom.
Corey Hartley   +2 more
wiley   +1 more source

重庆动物园猛禽救护分析

open access: yes野生动物学报, 2020
野生动物收容救护是动物园的重要职能,也是野生动物野外保护研究的补充。本文就重庆市动物园管理处2011—2016年收容救护猛禽情况进行分析与探讨:6年共收容救护猛禽22种133只,占重庆市分布猛禽种类的48.89%,含15种留鸟、1种夏候鸟和6种冬候鸟; 救护猛禽数量2011—2014年逐年下降,而后逐年上升; 救护猛禽的月份主要集中在1—3月和11—12月,为重庆市动物园管理处今后的收容救护工作安排奠定基础。
袁 梨 姚 勇 匡高翔 周 俊 王晓佳 田时飞 张邓华 唐家桂 吴登虎
doaj  

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