Results 31 to 40 of about 16,864 (162)

From “Striving to Survive” to “Striving to Thrive”: A Narrative Inquiry Into a Student's Motivational Development via Translanguaging in EAP and EMI Contexts

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT While English‐medium instruction (EMI) and English for Academic Purposes (EAP) courses are designed to promote language and content learning, their prevailing English‐only approaches often undermine students’ learning motivation. Against this backdrop, translanguaging has gained recognition as an effective pedagogical practice to support ...
Yihai Wen, Fan Fang
wiley   +1 more source

近自由面非定常空化流动特征与稳定性机理研究 [PDF]

open access: yes, 2017
近自由面非定常空化流动是水面航行器提高航速的重要障碍,主要表现为自由面/空化区相互作用,影响空泡的非稳态特征,空化流动的兴波效应也值得关注。以往研究大多针对定常问题,非定常的算法及实验验证手段的报道很少。本研究建立了水/气/汽三相并包含空化相变效应的大涡模拟数值方法,基于小尺寸水下发射水箱完成了典型的验证实验。计算得到的非定常空泡形态演化与实验结果吻合良好,验证了计算方法的精度和可靠性。在此基础上,分析了空泡形态非稳态演化的特征与自由面/空化相互作用规律 ...
徐畅, 王一伟, 黄晨光, 黄荐
core  

The Inclusion Trade‐Off: Comparing the Design and Functionality of Collaborative Governance Forums

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT Environmental challenges require collaboration across jurisdictions, often through forums or intermediary spaces for repeated interaction. A persistent forum design question concerns inclusion criteria, or which actors should be included.
Adam Wiechman   +3 more
wiley   +1 more source

试论初生侵蚀性坡面薄层水流的基本动力特性

open access: yesShuitu Baochi Xuebao, 1995
从水力学与泥沙运动力学观点,对初生态侵蚀性坡面薄层水流的基本动力特性,如流产;充态、临界水深、阻力系数等几个基本问题,作了半理论性探讨。
沙际德 蒋允静
doaj  

Hydrodynamic Design Specifications and the Stress Analysis of a Multifunctional Water-Tunnel [PDF]

open access: yes, 2014
水洞是进行流体力学和水动力学研究的重要实验设备。水洞中适宜开展边界层、湍流、尾流和舰船模型设计等实验研究,还可以用于研究空化、自由液面和水弹性等水动力学中特有的现象。水洞的设计建造对开展基础研究和解决实际工程问题都具有重要的现实意义。 本文重点研究关键部段水动力学设计和结构强度校核。水动力学设计部分主要包括系统功率损失计算和动力系统选择,收缩前二转角段优化设计,稳流与整流段低湍流度设计和收缩段优化设计。通过理论计算,确定了循环水洞系统的能量损失,选择了合适的动力系统 ...
杨锦文
core  

Case Study of "Wake Effect" of Adjacent Offshore Wind Farms [PDF]

open access: yes, 2023
[Introduction] The purpose of this paper is to study the influence of real "wake effect" of adjacent offshore wind farms on generation loss. [Method] The method is established with the wake scene classification based on the actual arrangement of wind ...
Donglin CUI   +4 more
core   +1 more source

Trends and Challenges in Water Governance Systematic Review and Bibliographic Study of Scientific Publications (2018–2025)

open access: yesWorld Water Policy, Volume 12, Issue 2, May 2026.
ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García   +1 more
wiley   +1 more source

城市河流淤泥中重金属释放规律的研究

open access: yesShuitu Baochi Xuebao, 2003
研究了哈尔滨何家沟淤泥中Cu、Pb、Zn、Cd释放的动力学过程及其影响因素,并用二级反应动力学等方程对其进行描述。结果表明,二级反应动力学方程拟合效果最好(r>0.9,n=17,p=0.001),释放速率为Cd>Zn>Cu>Pb,最大释放量为Zn>Cu>Cd>Pb,释放程度为Cu>Zn>Cd>Pb。影响因素实验结果显示,pH值对重金属的释放影响最大,而温度、盐度、泥水比的影响相对较小,且随着温度、盐度、泥水比的升高,淤泥中重金属的释放量呈增加趋势。
李鱼 刘亮 董德明 花修艺 杨帆 徐珑
doaj   +2 more sources

坡面径流的水动力学特性研究进展

open access: yesShuitu Baochi Xuebao, 2002
坡面径流不同于一般明渠水流,具有独特的水力学特性。详细论述了坡面径流产流理论、运动方程和水动力学特性等方面的研究进展情况,系统阐述了国内外对坡面径流的流态、流速测量和分析、水深确定、阻力表达以及径流分离挟沙能力等水动力学要素的研究,目的在于总结以往的研究经验和成果,促进相关研究的进一步发展。
郑良勇 李占斌 李鹏
doaj  

烟台近海大型底栖动物群落特征 [PDF]

open access: yes, 2013
根据2010年和2011年对烟台近海大型底栖动物的周年调查资料,采用优势度指数、物种多样性指数及Cluster聚类和MDS排序方法,进行群落特征和群落演替情况的。研究。结果表明,该海域共采集大型底栖动物176种,其中优势类群为多毛类。群落中的优势种主要包括短叶索沙蚕和不倒翁虫。烟台近海年平均生物量和丰度分别为16.72g/m~2和1022ind/m~2,且存在季节性差异。丰富度指数(D)、均匀度指数(J)和多样性指数(H')的年平均值分别为2.30、0.70和1.91 ...
李宝泉, 王全超
core   +1 more source

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