Results 1 to 10 of about 1,209 (192)
基于夹杂-细晶粒区-鱼眼疲劳失效的超长寿命预测模型 [PDF]
, 2017 A prediction model for the very high cycle fatigue life for inclusion-fine granular area (FGA) -fisheye-induced failure was studied in this work. Combined with the experimental results of Cr-Ni-W alloy steel, a local crack initiation life model (LCIL ...
邓海龙, 李伟, 孙振铎, 张震宇
semanticscholar +3 more sources
Investigation of RUL prediction of lithium-ion battery equivalent cycle battery pack [PDF]
, 2020 The depletion and environmental pollution associated with traditional fossil energy sources has generated great interest in the development of new energy.
Lei JI +4 more
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Durability and service life prediction of reinforced concrete structures [PDF]
, 2015 This paper presents some durability and service life models for reinforced concrete structures with regard to chloride ingress, carbonation and frost attack.
Boubitsas, Dimitrios +2 more
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, 2018 伴随智能制造技术的深入推进,刀具管理系统的功能根据用户业务需求在不断拓展。针对工艺设计后的刀具选购、使用直至报废等环节,基于\"刀具流\"开发了一款智能制造刀具管理系统,更精确地实现了刀具使用过程的数字化、网络化、智能化和可视化全生命周期管理。鉴于目前刀具状态监测技术的复杂和可靠性低等问题,在工程应用上提出了一种基于被加工工件表面粗糙度间接预测刀具剩余寿命的方法。整个系统在现场得到了良好应用。2016年工信部智能制造综合标准化与新模式应用项目(工信部联装[2016]213号);;国家自然科学基金项目 ...
姚斌 +4 more
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Analysis of service performance characteristics of debris flow check dams: A case study in Wudu District, Longnan City, Gansu Province [PDF]
, 2023 Check dams play a pivotal role in debris flow prevention and control engineering. However, their disaster prevention and mitigation capacity gradually decrease over service time due to repeated debris flow impacts. The study was carried out in 15 ditches
Liang ZHOU +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
doaj
Copula-based model for hot-rolling back-up roll health prediction [PDF]
, 2020 The health condition of hot-rolling back-up rolls plays a key role in controlling the strip profile quality and rolling stability. The characteristics of nonlinearity, strong coupling, and the use of limited samples complicate the prediction of the back ...
An-rui HE +5 more
core +1 more source
, 2018 为了准确预测外界环境对Ti40合金氧化反应的影响规律,利用一种新的气固反应动力学模型对阻燃钛合金Ti40合金在773~1 273 K范围内的恒温氧化行为进行研究。发现Ti40合金在773~873 K时的氧化主要受内扩散控制,活化能为262.20 k J/mol;在973~1 273 K时的氧化主要受界面反应控速,其活化能为155.67 k J/mol。另外,通过模型预测了各因素(氧气分压、温度、目标氧化厚度等)对其氧化反应分数ξ、特征时间tc和转化速率dξ/dt的影响规律。国家自然科学基金 ...
冉隆城, 刘静, 李宏, 杨峰
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Bootstrap与变权重相结合的多模型综合预测方法 [PDF]
, 2018 为了更好地估计构件的疲劳寿命,一种较好的策略是将几个合适模型进行合并预测,但传统合并预测的权重值为确定值,随着对预测精度要求的提高,变权重模型合并预测方法逐渐受到重视。但在工程中仅估计出预测结果还不足以提供充分的决策信息,进一步得到置信区间显得很有必要。本文提出一种基于Bootstrap与变权重的多模型综合置信区间预测方法,运用Bootstrap对合并数据进行再抽样,依据再抽样样本,采用变权重合并方法得到各项模型的权重函数,将各预测模型合并起来,最后通过百分位数法预测得到预测置信区间 ...
袁修开, 陈斌
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Fractal characteristics of fiber lithium slag concrete cracks under sulfate attack [PDF]
, 2022 Natural corrosion of concrete structure due to sulfate poses a serious threat to people's lives and property. Therefore, it is of great practical significance to study the phenomenon of sulfate corrosion on concrete.
Guang-tai ZHANG +3 more
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