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Cloud server aging prediction method based on hybrid model of auto-regressive integrated moving average and recurrent neural network [PDF]
, 2021 In view of the nonlinear, stochastic and sudden characteristics of operating environment of cloud server system, a software aging prediction method based on hybrid auto-regressive integrated moving average and recurrent neural network model (ARIMA-RNN ...
Haining MENG +5 more
core +1 more source
Journal of Diabetes, Volume 15, Issue 5, Page 382-396, May 2023., 2023 HighlightsAutophagy is closely related to retinal neurovascular units in diabetes retinopathy. Different cells participate in the occurrence and development of diseases through autophagy, and targeted autophagy may be a new direction of treatment in the future. Emphasized the close relationship between diabetic retinopathy (DR) and autophagy Summarized
Xiongyi Yang +6 more
wiley +1 more source
European Policy Analysis, Volume 8, Issue 3, Page 297-311, Summer 2022., 2022 Abstract Our analysis asks whether the pandemic situation affects welfare state support in Germany. The pandemic has increased the health and income risks calling for welfare state intervention. While increased needs, more deservingness, and higher state responsibility during such a crisis would suggest augmented support generally and among those at ...
Bernhard Ebbinghaus +2 more
wiley +1 more source
Journal of Advanced Nursing, Volume 77, Issue 3, Page 1546-1555, March 2021., 2021 Abstract Aims Determine sex‐ and age‐associated psychophysical and neurophysiological differences in the processing of pain across the adult lifespan. Design Preliminary, exploratory, cross‐sectional study. Methods Using psychophysics (to measure intensity and unpleasantness) and functional magnetic resonance imaging blood oxygenation level dependent ...
Sebastian W. Atalla +8 more
wiley +1 more source
, 2023 矿用高压电缆在实际使用中易受电、热、机械应力等多种因素的复合作用，加速绝缘老化，易导致电缆漏电、短路或放电等故障。目前，介电响应法被引入矿用电缆绝缘性能及老化状态的分析、评估和诊断中。针对基于介电响应法的电缆绝缘性能及老化状态评估问题，以常用的三元乙丙橡胶（EPDM）绝缘矿用移动软电缆为研究对象，总结了介电响应法中回复电压法、极化/去极化电流法和频域介电谱法的基本原理和典型特征量，对比了3种方法的优缺点。介绍了扩展Debye模型提取的老化因子、修正介电驰豫模型提取的弛豫特征量 ...
何庆辉 +6 more
core +1 more source
基于容量增量曲线的三元锂离子电池健康状态估计方法 [PDF]
全球能源互联网, 2018 锂离子电池的健康状态（SOH）是电池老化程度的综合评价指标，电池健康状态的表征及其估计是新一代电池管理系统的关键技术。研究了LNMCO体系的三元锂离子电池容量增量曲线（IC曲线）随电池衰退的变化特性，分析了IC曲线与电池老化密切相关的特征参数及其变化规律，建立了三元锂离子电池容量估计模型，表征电池的健康状态。针对特征量之间的多重共线性问题，提出了基于主成分回归的容量估计模型，试验结果表明，所建模型容量估计误差在2%以内。该方法采用能反映电池电化学特性的参数来估计电池容量，不仅给出电池的健康状态 ...
郭琦沛 +4 more
doaj +1 more source
Journal of Diabetes, Volume 12, Issue 9, Page 649-658, September 2020., 2020 Highlights Coronavirus disease 2019 (COVID‐19) is caused by SARS‐CoV‐2; recent modeling of the structure of SARS‐CoV‐2 spike glycoprotein, which mediates viral‐host‐cell entry, predicts interactions with dipeptidyl peptidase 4 (DPP4) in addition to angiotensin‐converting enzyme 2.
Margaret F. Bassendine +3 more
wiley +1 more source
Gaoya dianqi, 2023 绝缘老化状态的准确评估是保障固体绝缘开关柜安全稳定运行的关键。文中综述了中国固体绝缘开关柜绝缘老化及其检测方法的研究进展。首先对开关柜中主绝缘环氧树脂的老化机理进行了归纳总结，并重点讨论了热老化、电老化和环境老化的发展规律和研究进展；其次分别介绍了基于脉冲电流法、暂态对地电压检测和超声波检测的固体开关柜绝缘状态检测方法，以及基于人工神经网络、支持向量机、贝叶斯分类器、模糊聚类和随机森林算法的固体开关柜绝缘状态评估分析方法；最后展望了固体开关柜绝缘老化与状态检测研究中存在的问题及未来研究方向 ...
梁谦 +6 more
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Gaoya dianqi, 2023 电力变压器绝缘老化评估为电网的长期安全稳定运行提供了技术支持，在保证非破坏性试验的基础上，对绝缘状态进行诊断也是一直以来的研究热点。文中基于广义维纳过程对变压器建立老化模型，通过相关试验数据得到老化诊断指标，从而衡量变压器绝缘老化状态。对变压器健康状态进行分级，采用上述模型预测最短降级时间，相比于直接进行寿命预测，短期预测可以将未来人为操作信息纳入模型，最大化解决信息挖掘不充分的问题。最后对老化评估模型的相关分布参数进行优化求解，采用内蒙古电网设备真实历史数据迭代训练 ...
刘琦 +5 more
doaj
Logistic回归和支持向量机在电缆老化状态评估中的应用与比较
Gaoya dianqi, 2023 电缆老化状态评估主要有物理模型和统计模型两大类，物理模型一般用于电缆个体老化评估，但难以用于在线评估，统计模型一般用于电缆整体老化评估，无法评估个体状态。为建立电缆运行数据与电缆老化状态之间的关联关系，在线评估电缆个体老化状态，文中提出了基于机器学习的电缆老化状态评估方法，建立了Logistic回归和支持向量机这两种机器学习模型，采用十折交叉验证对模型准确率进行了评估，同时计算了模型的F1-Score。结果表明支持向量机采用多项式核时的总体样本准确率平均值为96%，高于Logistic回归 ...
谭笑 +5 more
doaj