Results 21 to 30 of about 329,067 (221)

Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English

open access: yesInternational Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.
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

Clip Voice: Misogyny and the Renegotiation of a Gendered Vocal Style in Chinese Digital Discourse

open access: yesJournal of Sociolinguistics, Volume 29, Issue 5, Page 348-359, November 2025.
ABSTRACT The participatory culture of social media allows women's voices to be heard but also parodied and policed. On Chinese social media platforms, where performers rapidly adopt and transform vocal trends for engagement, discourse on gendered vocal styles has proliferated.
Zichuan Yu, Rebecca Lurie Starr
wiley   +1 more source

基于波导模理论与果蝇算法的雷电甚低频定位研究

open access: yesDianci bileiqi, 2021
雷电定位算法直接影响着雷电定位的结果。针对传统雷电定位算法易发散、迭代次数多、定位精度低的情况,基于波导模理论,提出了一种基于波导模理论与果蝇算法(Modified Fruit Fly Optimization Algorithm,MFOA)的雷电甚低频定位研究技术。在探测站与雷电位置距离较远的时候,采用甚低频电磁波在空气中传播的相速、群速,修正算法中的光速,更接近电磁波在空气中传播的真实速度,提高定位的精确度。通过仿真的结果表明,该方法能快速收敛、跳出局部最优,定位精度高。
牛有田   +6 more
doaj  

直播卫星电视光接收机的研制

open access: yesGuangtongxin yanjiu, 2006
光纤接入是直播卫星(DBS)覆盖技术近期发展的热点之一,尤其是用于新一代Ka波段卫星下传的宽带卫星直播电视信号光传输的光发射机与接收机的开发研制更是成为当前研究的重要课题。通过对直播卫星下行信号和光接收机原理的分析,针对光纤宽带接入网的应用特点,设计并研制开发出了一款达到3 GHz带宽,用于接收宽带卫星电视光传输信号,具有较高灵敏度和较大动态范围的模拟光接收机。
傅焰峰   +5 more
doaj  

黄土丘陵沟壑区不同草本植物生长期植物纤维毯对沟道边坡产流产沙的影响

open access: yesShuitu Baochi Xuebao, 2020
为探究植物纤维毯在黄土丘陵沟壑区的适用性以及不同植物生长期植物纤维毯的水土保持效益,以内蒙古呼和浩特市清水河县为研究区,采用野外人工模拟降雨试验方法,对植物生长期为58,81,132天的直播草本边坡和植物纤维毯边坡径流产沙进行模拟试验。结果表明:(1)植物纤维毯护坡措施可显著延长边坡产流时间,并且产流时间随着植物生长期的增加而增加。在植物生长期为58,81,132天时,植物纤维毯边坡产流时间分别为86,110,243 s,明显大于裸坡(50,70,111 s)和直播草本边坡(73,83,123 s ...
张平   +8 more
doaj  

Communication Gaps in Australian Disasters: A Review of Australian Disaster Inquiries Recommendations About Public Communication From 2003 to 2023 澳大利亚灾害中的传播差距:2003年至2023年澳大利亚灾害调查关于公众传播的建议 Brechas De Comunicación En Desastres Australianos: Una Revisión De Las Recomendaciones De Las Investigaciones Sobre Desastres Australianos Sobre Comunicación Pública De 2003 a 2023

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 16, Issue 2, June 2025.
ABSTRACT Australia has experienced many disasters, and since colonization, a plethora of inquiries have been held into those events. Those inquiries have issued numerous recommendations about how disasters might be better dealt with, responded to, and managed. This article is a scoping review of recommendations from 2003 to early 2023 that emerged from
Jacqui Ewart, Danielle Heinrichs Henry
wiley   +1 more source

具有高阶传播准则的对称布尔函数的直接确定(英文)

open access: yes四川大学学报. 自然科学版, 2007
在密码学的应用中,布尔函数的传播准则和对称性是非常重要的性质.Preneel等率先提出高阶传播准则.作者用一个新的非常有趣的组合方法,给出一个对所有对称且具有二阶或二阶以上传播准则的布尔函数的直接确定,当函数一旦对称时,此法很可能有效.
李袁, 项兆虹
doaj  

關於數位匯流的基本管制問題 Fundamental Regulatory Issues in the Era of Digital Convergence [PDF]

open access: yesKējì Fǎxué Pínglùn, 2006
由於網際網路與數位科技的快速發展,數位匯流已經成為通訊傳播產業發展的主要潮流。數位匯流在技術上代表著不同數位產品間的功能整合;在產業面,則象徵著不同通訊傳播產業間的垂直整合。就管制面而言,數位匯流顛覆了原本以傳輸技術為區分基礎的通訊管制體系,並引發論者關於多媒體事業濫用市場力的疑慮。我國甫通過通訊傳播基本法及國家通訊傳播委員會組織法,並於今年成立國家通訊傳播委員會,以因應數位匯流的挑戰。 本文除討論國家通訊傳播委員會未來可能面對的管制挑戰外,並析述分層模式及技術中立原則等與數位匯流相關的管制思維 ...
李治安
doaj  

连绵起伏山体对雷电电磁信号的影响研究

open access: yesDianci bileiqi, 2021
连绵起伏的山体地形会对雷电电磁信号的强度和传播时间产生影响,进而影响到时间到达(time-of-arrival,TOA)雷电定位技术的准确性。本研究基于二维时域有限差分(two-dimensional finite-difference time-domain,2D FDTD)算法,对地闪回击电磁场在连绵山体地形的传播特征进行数值模拟,结果表明:1)连绵起伏山体的屏蔽作用和传播衰减对雷电信号强度的影响不可忽略。观测点附高山的静电屏蔽会引起垂直电场的显著削减。山体高度每增加500 m ...
陈佳雯   +8 more
doaj  

Quantitative support for the benefits of proactive management for wildlife disease control

open access: yesConservation Biology, Volume 39, Issue 1, February 2025.
Abstract Finding effective pathogen mitigation strategies is one of the biggest challenges humans face today. In the context of wildlife, emerging infectious diseases have repeatedly caused widespread host morbidity and population declines of numerous taxa.
Molly C. Bletz   +2 more
wiley   +1 more source

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