Results 31 to 40 of about 5,996 (122)

基于鸡群算法的微网经济运行优化

open access: yesGaoya 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  

Arbuscular mycorrhizal fungus reshapes the rhizosphere microbiome of alfalfa in response to above‐ground attack by aphids and a fungal plant pathogen

open access: yesFunctional 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
wiley   +1 more source

基于经济性与环保性的微电网多目标优化调度研究

open access: yesGaoya 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  

Patriotic rabbits or toxic men? Media ideology, entextualization, and enregisterment on Chinese interfaces

open access: yesJournal of Linguistic Anthropology, Volume 35, Issue 2, August 2025.
Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley   +1 more source

独立微电网微源多目标分层优化配置方法研究

open access: yesGaoya 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  

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

基于EPON通信的微电网支路交轴电流突变量保护方法

open access: yesDianci 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  

Effects of snake fungal disease (ophidiomycosis) on the skin microbiome across two major experimental scales

open access: yesConservation Biology, Volume 39, Issue 2, April 2025.
Abstract Emerging infectious diseases are increasingly recognized as a significant threat to global biodiversity conservation. Elucidating the relationship between pathogens and the host microbiome could lead to novel approaches for mitigating disease impacts.
Alexander S. Romer   +25 more
wiley   +1 more source

基于乌鸦搜索算法的孤岛微网多目标优化调度

open access: yesGaoya dianqi, 2020
为促进孤岛微网中可再生能源的消纳,减小负荷峰谷差。文中在孤岛微网中引入价格型需求响应,以微网运行成本最低和柴油发电机出力最少为目标,综合考虑功率平衡、抽水蓄能机组启停与工况转换等约束条件,构建了含风电、抽水蓄能和柴油发电机的孤岛微网多目标优化调度模型,并采用乌鸦搜索算法进行求解。仿真结果表明:在孤岛微网中引入价格型需求响应能有效削减负荷峰谷差,经济效益显著。与粒子群优化算法相比,乌鸦搜素算法在收敛速度和全局寻优的能力上具有明显优势。
黄景光   +5 more
doaj  

计及风光预测误差的微电网日前多目标优化控制策略

open access: yesGaoya dianqi, 2018
微电网风光资源出力预测的随机性导致优化决策方案存在偏差,为了减轻预测误差随机性对微电网运行的不利影响,针对风/光/柴/储并网型微电网系统,提出了计及风光预测误差的日前多目标优化控制策略。在建立微电网各单元模型的基础上,分析了影响风光资源的随机性因素;考虑系统供需平衡以及微电网各单元运行特性等主要约束,建立了同时优化经济效益和环境效益的多目标优化模型。建模过程中采用情景生成与削减方法处理风光资源预测误差带来的随机性。采用差异进化算法求解模型,通过算例仿真,比较不同模式下微电网的优化结果 ...
孙丛丛   +4 more
doaj  

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