Results 21 to 30 of about 15,036 (258)
Abstract The division of responsibilities for disaster preparedness between individuals and society is rapidly evolving: national‐level preparedness has made way for networked disaster risk governance, and citizens are also expected to play their part.
Maija Nikkanen+2 more
wiley +1 more source
Abstract Internet trade is increasingly recognized as a dispersal pathway of non‐native plant species that is difficult to monitor. We sought to identify non‐native flora present in the Chinese online market, the largest e‐commerce market globally, and to decipher the effect of existing trade regulations, among other variables, on e‐trading patterns ...
Achyut Kumar Banerjee+8 more
wiley +1 more source
Noninvasive diode laser–an effective and safe treatment of iris cysts in 46 eyes of 35 horses
Abstract Background Iris cysts in horses are often asymptomatic and noticed incidentally. However, cysts can cause local corneal oedema and erratic behaviour like shying, decreased performance and head‐shaking. Objectives To describe the use of diode laser as a noninvasive treatment option for iris cysts in the horse and to document factors influencing
Emanuël K. L. Stas+4 more
wiley +1 more source
基于等效电路阻尼稳定性判据的风电经柔性直流并网振荡风险与影响因素分析 [PDF]
柔性直流输电技术在大规模风电送出中应用越来越广泛,但存在因风电和柔直各自电力电子设备控制相互作用而引发系统振荡风险。首先,为从物理意义上解释振荡机理,以阻抗分析法为基础,推导基于等效电路阻尼的互联系统稳定性判据。然后,基于此判据和时域仿真结果,分析风机网侧变流器、锁相环和柔性直流换流器的控制带宽与振荡风险的关系,指出系统振荡频率随控制参数改变的变化规律。最后,分析风速和并网风机台数对风电经柔性直流送出系统的等效电路阻尼特性影响,提出振荡稳定性约束的控制参数设计要求。
王潇+4 more
doaj +1 more source
Abstract During the Great East Japan Earthquake, many people experienced the loss of family and friends, among other traumatic events. This study sought to clarify the impact of the loss of significant close others on posttraumatic stress symptoms (PTSS), as well as the factors associated with PTSS, among individuals who experienced the loss of ...
Mayumi Harigane+9 more
wiley +1 more source
Abstract Dyadic behavioral synchrony is a complex interactional process that takes place between the mother and her infant. In the first year of life, when the infant is prelinguistic, processes such as synchrony enable the dyad to communicate through shared behavior and affect.
Lisa Golds+3 more
wiley +1 more source
筛选适宜建设风-光互补系统的地区,探究这些地区互补系统最优配比,有助于提高风、光资源的利用率、实现能源结构的绿色低碳转型。为了识别三北地区风、光资源的分布情况及其互补性,首先利用基于四维同化数据的可再生能源评估模型,定量估算三北地区风、光发电年平均容量因子值空间分布情况。研究发现风、光资源发电潜力均较大的地区集中在河北北部和内蒙古,并得到三北地区风、光发电最优比例及相应的互补发电出力平稳性水平;从中筛选出风、光发电潜力大,发电平稳性较高的3个点位作为潜在的风-光互补基地,结合京津唐用电数据,得出三地风 ...
王子琳+4 more
doaj +1 more source
Influencing the influencers: Regulating the morality of online conduct in Indonesia
Abstract Indonesia boasts a lively influencer scene. These influencers promote various products and messages, including political messages, to their followers for commercial gain, and have been particularly active during the coronavirus disease 2019 (COVID‐19) pandemic.
Petra Mahy+2 more
wiley +1 more source
双馈风电场经柔性直流并网系统的宽频带振荡机理分析与风险评估 [PDF]
风电场经柔性直流并网存在几赫兹至几百赫兹频率范围的振荡风险。首先,为复现宽频域振荡特征,基于频率扫描的测量方法,建立双馈风电场孤岛接入柔性直流的振荡分析模型。然后,采用网络阻尼稳定性判据并结合时域仿真,剖析互联系统在次/超同步频率范围和中高频范围的振荡机理。之后,考虑风机、柔性直流控制参数以及风速和并网风机台数的变化,分别针对次/超同步频段、中频段、高频段的振荡情况分析系统阻抗特性,利用阻抗聚合法量化评估各个影响因素与系统潜在振荡风险的关系,给出不同影响因素的变化对系统振荡频率的影响。最后 ...
王潇+5 more
doaj +1 more source
火电机组灵活性改造与输电网规划多阶段联合决策方法 [PDF]
大规模风电并网对电力系统灵活性提出了很高的要求。针对大规模风电并网背景下的消纳问题提出了一种火电机组灵活性改造与输电网规划多阶段联合决策方法。通过将火电机组灵活性改造纳入输电网规划优化决策,统筹优化系统灵活性及传输能力,促进大规模风电并网消纳。基于规划周期内负荷功率预测曲线,并计及风电时序出力不确定性情景,以输电网建设投资成本、火电机组灵活性改造成本以及发电总成本、弃风电成本折现值之和最小为目标,以系统正常运行状态以及N ...
李瑜, 孙东磊, 王明强, 秦腾
doaj +1 more source