Results 21 to 30 of about 367,240 (203)
Gaoya dianqi, 2016 电力变压器作为电力系统的枢纽设备,其运行状态直接影响电力系统的可靠性。因此,评估电力变压器的运行状态继而采取科学合理的维修策略具有重要意义。针对多台电力变压器状态评估排序问题,提出了一种新的评估方法。首先分析确立了电力变压器状态评估指标,然后根据区间层次分析法（interval-based AHP,IAHP）确定了电力变压器状态评估指标的指标权重。结合区间数和TOPSIS法,建立了基于区间数TOPSIS法的电力变压器状态评估模型,最后根据相关数据对8台变压器的状态进行了评估。计算结果表明 ...
卜宪存, 张海英
doaj
Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean
Conservation Biology, EarlyView.Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada +2 more
wiley +1 more source
Gaoya dianqi, 2017 高压断路器的运行状态评估是指导高压断路器状态维修、提高其运行可靠性及保证电力系统安全稳定运行的重要手段。文中依据物元可拓理论和证据融合理论建立了一个高压断路器状态评估模型。首先对高压断路器状态评估进行物元分析,通过构造关联函数并计算评估指标的关联函数值,仅凭关联函数值的正负就能初步确定评估指标是否异常;然后依据集对分析理论对评估指标初步所处状态等级的不确定性进行处理,得到评估指标的等级关联度,并将评估指标的等级关联度进行修正作为信任分配函数 ...
常怡东, 张开轩, 金潇
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World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT Village tank cascade systems (VTCS) are a long‐established form of water management in Sri Lanka's dry zone. However, their role in groundwater recharge, climate adaptation, and water governance remains insufficiently recognized in policy and planning.
Ananthini Nanthakumaran +1 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 7, Page 2332-2344, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) serve as important indicators for assessing nutrient balance in forest ecosystems, but their relationships with photosynthetic dynamics require deeper characterization.
Minghao Chen +9 more
wiley +1 more source
Gaoya dianqi, 2009 根据高压断路器状态信息的多层次性和多因素性,建立高压断路器状态评估的层次型指标体系。利用模糊综合评判法,建立高压断路器运行状态评估模型,通过对各层评判因素的评估,综合得出断路器的具体运行状态。指标的权重先由层次分析法确定常权权重,然后引入基于均衡函数的变权模式,对常权进行修正得到变权,以提高状态评估的准确性,为高压断路器状态评估提供了一种新的思路。
陈伟根, 魏延芹, 廖瑞金
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 756-763, June 2026.ABSTRACT Objectives Cytomegalovirus (CMV) is the leading cause of congenital infectious neurosensory impairment. We aimed to present national epidemiological data on maternal CMV infection during pregnancy in France, focusing in particular on primary infection in the periconceptional period or first trimester, and to assess the impact of changes in ...
P. Coste‐Mazeau +176 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 836-851, June 2026.ABSTRACT Objective To determine whether ultrasound is non‐inferior to positron‐emission tomography/computed tomography (PET/CT) and diffusion‐weighted magnetic resonance imaging (DW‐MRI) in terms of overall diagnostic accuracy for the preoperative assessment of pelvic lymph‐node status in cervical cancer.
F. Frühauf +14 more
wiley +1 more source
Gaoya dianqi, 2016 为了对断路器操动机构的分、合闸弹簧（简称弹簧）储能状态进行评估,将模糊综合评判应用到高压断路器的弹簧状态评估中。选取反映断路器弹簧储能状态的典型特征参量,建立评判因素集;根据断路器弹簧的实际状态情况,建立评判等级集;采用专家估计法与层次分析法,建立评判的权重集;构建隶属函数描述评估因素与状态等级间的模糊关系,确定模糊算子及结果处理方法,进而完成整个模型用以对断路器弹簧状态进行综合评估。LW25-126型断路器上的实例验证表明,该模型可以客观有效地评估高压断路器弹簧的储能状态。
赵思洋 +5 more
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Gaoya dianqi, 2020 为有效评估大电流开关柜梅花触头接触状态,避免发生严重热故障,需提高梅花触头热缺陷评估的灵敏度和准确性。因此,设计了一种长期评估梅花触头接触状态的算法用于热缺陷评估。首先,基于人工神经网络改进了传统的相对温差法,并根据正态分布统计修正了相对温差的计算结果。其次,基于改进的相对温差法设计了一种热缺陷评估算法。算法中相对温差的计算结果被划分为8个状态级别分别表征不同程度的状态。对存在异常的状态设计了"N+3"判断算法和"24 h密集评估"算法 ...
李江涛, 孙义, 李擎宇
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