Results 51 to 60 of about 6,834 (170)
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, 2017 文中分析微网中微电源包括光伏发电、风力发电、微燃机、柴油发电机和燃料电池的电气特性,构建微电网优化运行的模型,以微网的经济成本和环境成本最小为目标函数,充分考虑了电压越限、功率平衡、微电源出力限制等约束条件,应用鸡群算法进行求解。解决了粒子群算法易早熟、易陷入局部最优解的问题。并通过典型的微网系统进行仿真分析,仿真结果验证了该算法的有效性。
胡汉梅, 李静雅, 黄景光
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 微电网的研究及发展归根结底是为了应对目前能源、资源紧张,环境污染等一系列问题,因此微电网不仅要满足基本供电需求,还应提高其经济性与环保性。文中主要通过建立分布式电源模型及多目标优化模型对微电网内的分布式电源进行优化调度,根据对微电网的具体要求运用遗传算法进行优化计算,进行最优化配置。算例结果通过24 h内不同优化的结果进行对比,得到最优配置,验证了模型在微电网多目标优化方面的有效性,从而达到对微电网整体性最优化。
赵磊, 曾芬钰, 王霜, 杨宝泉
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, 2018 微电源的优化配置是微电网设计规划阶段的重点,是实现微电网整个生命周期安全可靠经济运行的基础。文中提出了以负荷支撑最大和系统总成本最低为多目标的独立微电网微电源优化配置方法。提出微电源配置要以保证电能质量及供电可靠性为前提,进而提出了相应的微电网组网规则,并验证了组网规则是微电源配置中必须遵守的规则之一;提出了将储能作为系统源储荷平衡的桥梁,以实现对不可控微源的补充作用;还分析了系统备用度对微电源配置的影响,为微电网后续的扩展奠定基础。文中分别对2类微电源进行分析,采用分层优化方法进行求解 ...
李咸善 +4 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
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Dianci bileiqi, 2018 传统的继电保护难以满足微电网的保护要求。针对微电网继电保护的需求,提出了基于EPON通信的支路交轴电流突变量微电网保护方法。基于图模型理论,定义微电网分割区域原则,将微电网实时拓扑结构转化为有向节点图。基于以太无源光网络（EPON）来实现数据的传输,应用park变换提取支路电流交轴量,通过电流突变量保护算法获得故障信息值,最终通过节点遍历法进行故障定位与隔离。该保护方法能够根据微电网结构变化自适应改变关联矩阵,并且保护判据不会因为网络拓扑结构变化而改变,具有良好的适用性。最后通过PSCAD ...
董博, 王海玲, 杨帆
doaj
A Wireless Multi-Objective Power Sharing Method for Energy Storage System in DC Micro-Grid Considering Oscillatory-Type Power [PDF]
As the construction of new power systems, DC microgrids will become an important part of the distribution network. As AC load connecting to DC microgrids, the oscillating power will enter the DC system, which affects the power distribution of energy ...
LU Gang +4 more
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Functional Ecology, Volume 39, Issue 8, Page 2149-2169, August 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plants assemble beneficial rhizosphere microbiomes through a ‘cry for help’ mechanism upon pathogen or insect herbivore attack. The arbuscular mycorrhizal fungi (AMF) can influence the composition of microbial communities in the plant rhizosphere. However, their impacts
Yingde Li +6 more
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