Results 11 to 20 of about 937 (105)
Journal of Diabetes, Volume 15, Issue 1, Page 7-14, January 2023., 2023 Highlights Red blood cell (RBC) lifespan variation, is the main cause of variation in glycosylated hemoglobin (HbA1c), independent of blood glucose levels. This study highlighted the important impact of RBC lifespan on HbA1c test value in T2DM with HbA1c test value <7%. We discovered that the HbA1c test value in type 2 diabetes (T2DM) patients with RBC
Junmei Wang +6 more
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Journal of Applied Ecology, Volume 58, Issue 10, Page 2287-2304, October 2021., 2021 Field boundary features have an important role in stabilising pollinator populations and pollination service in rotational systems, although maintenance of larger semi‐natural habitat patches may be more effective for stabilising less mobile solitary bee populations.
Emma Gardner +16 more
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Combined effects of life‐history traits and human impact on extinction risk of freshwater megafauna
Conservation Biology, Volume 35, Issue 2, Page 643-653, April 2021., 2021 Abstract Megafauna species are intrinsically vulnerable to human impact. Freshwater megafauna (i.e., freshwater animals ≥30 kg, including fishes, mammals, reptiles, and amphibians) are subject to intensive and increasing threats. Thirty‐four species are listed as critically endangered on the International Union for Conservation of Nature (IUCN).
Fengzhi He +5 more
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Dianci bileiqi, 2022 以沿海工业地区运行0～13年复合绝缘子为研究对象,根据以往的研究经验,采用静态接触角法、硬度测试法等方法对复合绝缘子样品寿命预测参数进行测试。基于测试结果通过统计学方法得出与老化年限显著相关的参数,并利用BP神经网络系统对沿海工业地区复合绝缘子的运行寿命进行预测。研究结果表明:寿命预测参数HC级别HC、静态接触角θ、硬度A、拉伸强度T、Si-O-Si与Si（CH3）2吸收峰高度比值H、O元素相对含量XO与老化年限具有显著的相关性,可以对复合绝缘子的老化程度进行精准的评价;通过检验 ...
陶风波 +4 more
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International Social Security Review, Volume 78, Issue 4, Page 53-78, October/December 2025.Abstract This paper examines disparities in longevity among Spanish retirement pensioners aged 65+, focusing on pension income and gender between 2008 and 2021. Using linked administrative records, we estimate life expectancy and complementary indicators (median, modal age at death, interquartile range).
Carlos Vidal‐Meliá +2 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 290-297, September 2025.ABSTRACT Objective The purpose of this cost‐utility analysis was to model the clinical and economic impact of three cervical‐length screening strategies among low‐risk twin pregnancies: two‐step universal screening (at 18–20 and 20–22 weeks), one‐step universal screening (at 18–20 weeks) and no screening.
Y. Khaikin +4 more
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Jingshui jishu【目的】本文致力于突破膜生物反应器(MBR)膜寿命预测领域的技术瓶颈，即针对缺乏多维耦合的寿命评价指标体系及难以精准量化膜污染与膜性能衰减协同作用机制，构建科学的寿命预测方法体系。【方法】建立以比通量为膜性能衰减和寿命评价的核心指标，跨膜压差实时表征膜污染动态，累计产水量界定机械极限的三级指标体系。基于“理化性能衰减-功能极限判定-维护干预影响”的全生命周期理论框架，本文构建了集成比通量衰减法、累计产水量分析法及化学清洗强度评估法的寿命预测方法体系 ...
Yan Xin +6 more
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Gaoya dianqi, 2010 对油浸式变压器油中溶解的糠醛含量进行分析可以预测变压器的绝缘寿命。笔者通过采集变压器油中的糠醛及CO、CO2,利用油中糠醛含量与运行年限的对应关系,并按理论分布计算出变压器的糠醛浓度注意值,给出了变压器固体绝缘的诊断流程并基于平均剩余寿命的方法给出了油浸式变压器剩余寿命的预测公式。实例分析证明,该预测公式能够提供较好地剩余寿命预测。
林朝晖 +3 more
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Gaoya dianqi, 2015 文中基于广义回归神经网络（GRNN）技术挖掘数据变化规律,构建了GRNN神经网络预测模型,运用该模型对油纸绝缘变压器进行寿命预测。将变压器绝缘纸老化过程中生成的特征产物如糠醛、CO2和CO的质量分数,以及相关时间参量作为模型输入。将所采集的多组油纸绝缘变压器的测试样本作为基础数据,运用该模型对相应的变压器进行寿命预测。结果表明,模型寿命预测的输出值与实际值基本一致,从而验证了模型的合理性,这对监测绝缘材料老化状态的进一步研究具有现实意义。
林喆, 兰生, 张宇航
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Gaoya dianqi, 2010 为了保证变压器的安全运行从而提高其经济效益,对变压器进行剩余寿命预测并采取相应对策显得尤为重要。研究表明,通过对油浸式电力变压器油中溶解的糠醛体积分数以及气体测定可以进行变压器固体绝缘寿命的监督。为此,笔者利用BP神经网络建立起油中CO、CO2、糠醛含量以及运行年限来预测绝缘纸老化程度的关系模型。实例结果表明,通过此方法能够提供比较准确的变压器寿命预测。
林朝晖, 张彼德
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