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Design and Application of Three-Dimensional Digitization and Intelligent Operation System for Converter Station [PDF]
, 2023 [Introduction] In response to the pain points of the operation and maintenance of the converter station, the design methods of the three-dimensional digitization and intelligent operation system are proposed, and the actual application is performed in ...
Hao ZHANG +5 more
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Research on the Application of Digital Twin Technology in Power Grid Engineering [PDF]
, 2023 [Introduction] In view of the digital transformation under the development of big data and the Internet, the application status of digital twin technology in power grid engineering is analyzed.
Hao ZHANG +4 more
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A significant statement: new outlooks on treatment documentation [PDF]
, 2016 Values-based conservation is an increasingly dominant theme in heritage conservation theory. It is less routine in the application of object conservation practice, where emphasis on the physical fabric of heritage prevails.
Cutajar, JD +3 more
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Gaoya dianqi, 2022 针对高压XLPE电缆缓冲层烧蚀故障频发，缓冲层烧蚀影响因素较多，难以准确评估在运电缆缓冲层状态的情况，提出了一种缓冲层状态模糊综合评估方法。根据缓冲层烧蚀故障机理及带材特性，建立状态评估因子及评估分级标准。在此基础上，采用改进层次分析方法确定评估因子的权重。采用模糊综合评价方法，计算缓冲层状态评估等级隶属度向量。根据最大隶属度原则确定最终评估结果。通过实例计算表明，该评估方法能够对缓冲层状态进行准确评估，有效降低人的主观因素影响，为制定在运高压XLPE电缆缓冲层状态运维管控措施提供了科学依据。
周韫捷 +6 more
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Gaoya dianqi, 2022 输变电设备运行状态评估是电网企业技术管理的重要内容，针对目前电力变压器健康状态评估模型中存在的对状态量单一赋权不合理、实现步骤较为繁琐、算法性能不稳定等问题，文中采用加权秩和比WRSR(weighted rank sum ratio)模型对电力变压器健康状态进行评估，该模型原理简单，易于实现。通过选取电力变压器运行中典型状态量，采用组合赋权的理论对各状态量赋予权值大小，进而计算评估对象的加权秩和比。利用加权秩和比确定待评估对象的概率单位，并将概率单位作为自变量代入回归方程中得到状态评估结果 ...
咸日常 +5 more
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Gaoya dianqi, 2021 电力变压器结构、运行工况复杂,影响其健康状态的因素众多,建立有效的变压器健康状态评估模型对其状态进行准确评估是十分必要的。文中提出一种考虑变压器历史运行工况影响的变压器健康状态评估模型。从油色谱试验、电气试验、油化试验数据及现场评估等方面提取相关重要指标作为定量指标和定性指标,通过主客观组合权重和岭型隶属函数完成基于定量指标的变压器状态初步评估结果;考虑变压器历史工况建立定性指标对初步评估结果进行合理修正,完成对变压器健康状态的评估。最后以宁夏地区1台110 kV主变验证了该评估方法的有效性和准确性 ...
周秀 +7 more
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, 2019 为了快速评估既有桥梁的安全性,研究了基于多源实测信息快速准确识别桥梁影响线的方法。首先利用桥梁动力响应及车辆移动的实测信息,建立影响线识别的数学模型。在模型中引入Tikhonov正则化方法以解决病态矩阵求解问题,通过设置罚函数项以取得较光滑并贴近真实的影响线。然后通过基函数扩展法重构影响线,将其表示为一系列三次B样条基函数的线性组合,从而将问题从识别众多影响线因子简化为识别少量基函数权重系数。为了验证上述方法的可行性,先在实验室模拟钢制试验小车在钢筋混凝土三跨连续梁模型上移动的过程 ...
杨维彪, 程棋锋, 陈志为, 高婧
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Research review on life-cycle health management and intelligent maintenance of coal mining equipment [PDF]
In recent years, with the rapid development of intelligent technology in coal mines, the whole life cycle health management and intelligent maintenance technology of coal mine equipment has attracted wide attention.
Fuyuan ZHAO +10 more
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Effect of delivery mode on postpartum pelvic floor function in primiparous women [PDF]
, 2023 Objective To evaluate the pelvic floor functional status of primiparous women undergoing different delivery modes within 2 years postpartum. Methods Primiparous women admitted to the Pelvic Floor Center of Department of Gynecology were enrolled in this ...
Tan Qiuxiao, Ye Juntong, He Yunxia, He Juan, Li Juanhua, Li Tian
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Gaoya dianqi, 2022 针对变压器本体绝缘状态评估中的状态信息指标的不确定性，文中提出了基于模糊评判理论与DSmT的变压器本体多级绝缘状态评估模型，该模型分为本体绝缘状态等级评估与绝缘缺陷风险等级评估。应用模糊评判理论构建等级评估的隶属度函数模型，选择反映变压器绝缘状态的绝缘类指标参量作为模型的输入，应用熵权法改进的DSmT对指标隶属度进行融合得到最终的等级评估结果，该模型有效克服了等级区间界限值过于绝对化的局限性，解决了传统DST高冲突性证据的融合问题。通过实例验证，该模型的评估结果具有一定的有效性 ...
夏彦卫 +5 more
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