Results 21 to 30 of about 5,996 (122)
Gaoya dianqi, 2018 相对于传统电网而言,微电网具有灵活多变的特点,尤其是独立微电网,其可工作于多种运行模式下。不同的工作模式会带来不同的经济效益,为此,有必要对具有多种运行模式的微电网进行研究。针对这种具有多种运行模式的微电网,建立了相应的经济调度模型,定义了3种场景,分场景定性研究独立微电网的经济调度策略;在建立了经济调度模型的基础上,内层采用优先排序法,外层采用改进的粒子群算法,实现经济调度模型的求解。最后,结合南麂岛微电网算例,对3种场景下微电网经济调度模型进行求解,仿真结果表明 ...
杨欢红 +3 more
doaj
Global Change Biology, Volume 31, Issue 11, November 2025.This study assessed the potential impacts of climate and land‐use change on soil fungal diversity across four North American biomes. We found that climate change typically caused both diversity losses and gains, particularly in coniferous forests and among arbuscular mycorrhizal fungi, whereas land‐use change mainly reduced diversity, especially in ...
Wenqi Luo +5 more
wiley +1 more source
Gaoya dianqi, 2016 微网故障检测与保护的研究是配电网领域的热点问题。文中首先分析了微网保护面临的主要问题,然后提出了一种新的对含有逆变器分布式电源的微网内部故障的保护方法:实时计算分布式电源等效工频阻抗幅值的变化情况来识别微网内部线路故障;利用不平衡电流来识别微网内部负荷故障;最后基于PSACD/EMTDC搭建的仿真模型验证了新方法的正确性。
张玉凤, 陈松立, 吉高卿
doaj
Policy Studies Journal, Volume 53, Issue 4, Page 994-1013, November 2025.Abstract Defined by threat, urgency, and uncertainty, crises produce opportunities for government leaders to exploit and create meaning around their policy decisions in such unstable circumstances. In narrating their preferred policy solutions, one of the tools governments can use is relying on evidence‐based information.
Laura Mastroianni, Stefania Profeti
wiley +1 more source
Gaoya dianqi, 2015 蓄电池作为储能装置,是确保微网稳定经济运行的重要组成部分,为了研究它对微网经济效益的影响,建立了基于微网经济性最优的蓄电池容量配置模型。针对某企业内热电联产型微网系统,构建了孤网和并网下以综合运行成本最低为目标函数的微网经济优化调度模型,在孤网下提出了一种定量分析方法配置蓄电池所需最小容量,通过模型求解确定实现微网总成本最低所需配置的蓄电池容量。在实时电价背景下,采用改进遗传算法优化各时刻蓄电池出力及向外网的购售电量,制定了蓄电池最优充放电策略,仿真结果验证了所提模型、策略的有效性和算法的适用性。
况达, 滕欢, 王博堃, 黄炜果
doaj
Functional Ecology, Volume 39, Issue 10, Page 2772-2789, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract The soil microbial community plays an important role in maintaining the functional balance of grassland ecosystems. However, it is unclear how soil microbial diversity and complexity change in the desert steppe under different grazing times and what ecosystem factors ...
Zhuo Liu +7 more
wiley +1 more source
Gaoya dianqi, 2015 文中综述了微网特点及其控制策略,分析了微网不同运行模式下电能质量的基本特征及其电能质量监测应关注的主要议题。分析表明:微网不仅需要关注稳态、暂态电能质量问题,也需要关注瞬态电能质量议题;微网电能质量测量不仅要关注基于电能质量国标限值的干扰测量,还要关注基于设备危害的电能质量测试数据并采用合理的评估方法。在该基础上,文中概括了目前微网电能质量控制的争议所在,突出表现在当大电网电能质量不满足要求时,微网是否需要主动转入孤岛运行模式。
潘爱强 +3 more
doaj
Integrative Conservation, Volume 4, Issue 3, Page 476-490, September 2025.The leaf functional traits of angiosperms and gymnosperms in mountain ecosystems significantly influence phyllosphere fungal diversity. These traits are critical for understanding fungal stress resistance and elevational adaptation, which aids in predicting plant responses to climate change.
Xiaocheng Yu +7 more
wiley +1 more source
Gaoya dianqi, 2015 微电网中光伏发电出力及负荷波动具有的随机性会造成微电网运行方式的动态变化,为在微电网逆变控制器设计中计及这种动态变化,文中提出了一种基于动态概率特征根分析的微电网逆变控制器参数优化方法。这种方法以特征根的动态概率分布特性为微电网的稳定性评价指标,将微电网中逆变控制器参数的整体优化表示为带不等式约束的非线性优化问题,并利用微分进化算法对该问题进行求解。该方法能够全面准确地计及微电网运行方式多样性对系统稳定性的影响,得到的最优控制参数对系统运行方式的变化具有良好的鲁棒性,仿真结果证明了该方法的有效性。
董开松 +5 more
doaj
Nerd Harder: A Typology of Techno‐Legal Solutionist Logics in Child Online Safety Laws
Policy &Internet, Volume 17, Issue 3, September 2025.ABSTRACT As jurisdictions worldwide grapple with regulating social media's effects on youth, US state legislatures have emerged as important laboratories for “techno‐legal solutionism”—the belief that complex social problems can be solved through legally mandated technical fixes.
Amanda Reid, Lorcan Neill, Evan Ringel
wiley +1 more source