Results 31 to 40 of about 326,742 (162)
Abstract This study examined the role of maternal mind‐mindedness (MM) – the tendency to ascribe mental states to one's child – in infant regulatory symptoms and disorders and the moderating role of parenting stress and global psychological distress. A better understanding of these relationships may inform prevention and intervention programs.
Anna Katharina Georg +4 more
wiley +1 more source
针对换流变压器结构复杂、难以对其进行精确状态评价的问题,提出了一种基于DHGF算法的换流变压器状态评价方法,建立了相应的评价指标集及对应的组合权重,给出了相关的白化权函数、权矩阵和评判矩阵,构建了完整的数学模型。运用DHGF算法对换流变压器的运行状态进行实例分析,得到了评估对象的状态等级和评分值。评价结果能较好地反映设备的实际状况,可为下一步的检修决策提供科学依据。
张彪 +5 more
doaj
Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang +6 more
wiley +1 more source
为了适应变电设备向大容量化、高电压化、结构多样化、密封化及设备状态检修的发展趋势,笔者在区间物元可拓原理、云模型和灰色模型的组差值法的基础上,建立基于多源信息的变压器两级和综合评价模型,给出了变压器单因素指标的趋势预测评价和整体状态评价的具体方案。在两级评价中利用顶层油温、绕组热点温度和负载能力计算综合相对劣化度并得到自然模式和加速劣化模式的综合评价分值,在综合评价中利用统计模型得到不良工况和可靠性对运行状态进行补充,首次建立负载能力模型和故障预测模型,对变压器运行状态进行修正 ...
张晗, 常安, 王奇, 周湶, 梁韵
doaj
ABSTRACT The COVID‐19 pandemic precipitated a global emergency and governments employed various strategies to increase COVID‐19 vaccine coverage across the population, including vaccine mandates. No comparative study has evaluated the development, implementation, and structure of COVID‐19 mandatory vaccination policies in the Southeast Asia region ...
Nor Kamila Kamaruzaman +9 more
wiley +1 more source
在传统的变压器状态评价方法中,常权无法客观反映变压器部分参数偏离正常值时对整体评价影响。基于此,笔者提出了基于变权重的变压器模糊综合状态评价方法。首先采用层次分析法确定变压器各影响因素指标的权重,然后考虑实际情况对各影响因素权重进行变权处理,减少评价的主观性,使变压器的状态评价结果更为合理。应用文中方法对实际变压器进行状态评价,验证了该方法的合理性和可行性。
李磊, 熊小伏, 沈智健
doaj
We assessed the distribution of 14 threatened agamid lizard species using Species Distribution Modeling to identify hotspots for these species' conservation. Based on the results, high‐priority areas of threatened agamids were projected to occur specially in the wet zone.
Iresha Wijerathne +10 more
wiley +1 more source
变电站防雷与接地装置是电力系统中的重要设备,是电力系统发生接地短路时设备与人员安全的重要制约因素,其评价结果也是指导制定年度技改大修计划的关键依据。目前,对变电站防雷与接地装置的状态评价主要依据Q/GDW611-2011《变电站防雷及接地装置状态评价导则》执行。随着状态评价工作的持续开展,笔者对评价导则中的若干评分项目存在困惑,在对其分析阐述的同时提出了一些建议,目的是希望能够促进评价导则更加客观、高效地评价设备的真实状态。文章同时对防雷与接地装置的评价工作提出了若干建议。
郭磊
doaj
China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
wiley +1 more source
针对变压器状态单一评价方法存在的不足和影响变压器性能的状态量错综复杂的特征,建立基于层次分析法和粗糙集的变压器状态评估模型。对变压器部件、状态量进行层次结构划分,借鉴专家经验并以层次分析法求得各部件、状态量的主观权重;结合变压器测试数据,运用粗糙集理论分析出各部件、状态量的客观权重;将主、客观权重进行优化组合,以反映各部件、状态量在变压器综合状态评估的权值。运用该模型对两台不同类型变压器的检修数据进行分析并得出变压器状态评价结果,将该结果与实际变压器检修状况对比,结果表明 ...
彭道刚 +3 more
doaj

