Results 31 to 40 of about 4,174 (153)

Challenges, Strategies and Key Technologies for Virtual Power Plants in Market Trading [PDF]

, 2023
With the massive access to renewable power generation and the advancement of the marketization process, the development prospects of virtual power plants that can give full play to the value of flexible resources have gradually emerged. In the process of
CHEN Haoyong, HUANG Yuxiang, LIAN Junhao, WANG Yushen, WU Xiaobin, XU Xingyuan, ZHANG Jianbin   +6 more
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Profiling EFL Students’ Motivation and Anxiety in Collaborative Learning: Associations With Teachers’ Support, Self‐Regulated Learning, and Achievement

International Journal of Applied Linguistics, Volume 36, Issue 2, Page 979-994, May 2026.
ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley   +1 more source

Design of low-frequency charge pump PLL [PDF]

, 2014
设计一款音频范围内的电荷泵锁相环,采用动态d触发器鉴频鉴相器及电流舵差分输入电荷泵。压控振荡器采用了对电容充放电的形式产生震荡波形,实现低频输出。采用HHnEC bCd035工艺并用CAdEnCE软件实现仿真,实现250 kHz频率锁定,锁定时间为80μS,锁定时相位差为75 nS且压控振荡器控制电压纹波为5 MV。A charge pump PLL working in audio frequency was designed,in which a TSPC-PFD and a current ...
庄锦清, 李开航, 罗雪芹
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Review of Grid-Forming Energy Storage and Its Applications [PDF]

ObjectivesThe characteristics of low inertia and low damping in “double-high” (high renewable energy penetration and high power electronics application) power system pose significant challenges to grid stability, particularly in terms of frequency and ...
FAN Xuejun, LI Yalou, ZHAO Fei
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A cross‐linguistic approach to investigating metacognitive regulation in writing among Chinese EFL learners: Insights for its trait/state distinction

International Journal of Applied Linguistics, Volume 35, Issue 1, Page 274-290, February 2025.
Abstract Metacognitive regulation refers to learners’ ability to use a repertoire of metacognitive strategies to guide, observe, and manage thoughts, actions, and emotions in learning activities. It has been widely acknowledged as a significant predictor of language learning success, including writing.
Wandong Xu, Xinhua Zhu
wiley   +1 more source

Demographic and net primary productivity dynamics of primary and secondary tropical forests in Southwest China under a changing climate 气候变化背景下中国西南热带原始林和次生林的群落和净初级生产力动态研究

Integrative Conservation, Volume 3, Issue 3, Page 230-243, September 2024.
Tropical secondary forest at early sucessional stage had higher diamter growth rate and mortality rate, however, these forests also are more risked to droughts and high temperatures. Rising temperatures and more frequent droughts may decrease the carbon sink capacity of tropical forest ecosystems. Abstract Tropical forests are major carbon sinks on the
Sai Tun Tun Oo, Shankar Panthi, Ze‐Xin Fan, Xiao‐Yang Song, Huanyuan Zhang‐Zheng, Zaw Zaw, Hua‐Zheng Lu, Hui Chen, Yun Deng, Rong Zhao, Hua Lin, Pei‐Li Fu   +11 more
wiley   +1 more source

From co‐regulation to self‐regulation: Maternal soothing strategies and self‐efficacy in relation to maternal reports of infant regulation at 3 and 7 months

Infant Mental Health Journal: Infancy and Early Childhood, Volume 45, Issue 2, Page 135-152, March 2024.
Abstract This study, conducted in Germany, examines the role of maternal soothing strategies to explain the association of maternal self‐efficacy with infant regulation (crying and sleeping behavior). Questionnaire data of 150 mothers, living in Germany, with mixed ethnic and educational backgrounds were collected when infants were 3 and 7 months old ...
Natalie Kiel, Gizem Samdan, Annika S. Wienke, Tilman Reinelt, Sabina Pauen, Birgit Mathes, Charlotte Herzmann   +6 more
wiley   +1 more source

Endangered beach mouse resistance to a Category 5 hurricane is mediated by elevation and dune habitat 濒危海滩鼠类五级飓风的抵抗力受海拔和沙丘栖息地的调节

Integrative Conservation, Volume 3, Issue 1, Page 36-45, March 2024.
Threatened and endangered species that occur in coastal areas are susceptible to the impacts of hurricanes that can destroy and reorganize their habitats. We used long‐term tracking of endangered beach mice to reveal they survive these impacts by using high elevation dune habitats to stay safe.
Michael V. Cove, Samantha L. Dietz, Chad T. Anderson, Amy M. Jenkins, Katie R. Hooker, Melanie J. Kaeser   +5 more
wiley   +1 more source

Probabilistic load flow calculation for three-phase unbalanced droop-regulated islanded microgrids based on low-rank approximation method [PDF]

, 2020
For the characteristics of unbalanced nodes and constant frequency in the sagging control island microgrid, taking into account its three-phase asymmetry and the influence of uncertainty factors, a three-phase probability trend calculation method based ...
Fu, H., Liu, J., Pan, Z., Tong, X., Wu, J.   +4 more
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Automatic Measurement and Laser Trimming of Microwave Dielectric Resonator [PDF]

, 2009
新型的介质陶瓷材料具有介电常数高、介质损耗低、温度系数小等优点。介质陶瓷制作的微波介质谐振器是现代微波电路的关键元器件，在缩小电路体积、降低电路损耗、提高电路稳定性上起着关键性作用。微波介质谐振器构成的介质滤波器、介质天线、介质稳频振荡器等微波电路的主要元器件，广泛应用于移动通信、卫星广播、GPS导航等领域。 谐振频率是微波介质谐振器的主要参数之一。本文分析了常见的介质谐振器谐振频率的求解方法：等效介电常数法、模匹配法、有限差分法等，提出采用亥姆霍兹方程的等价泛函 ...
杨国山
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