Results 81 to 90 of about 509 (166)
Dianci bileiqi就沿海高盐雾环境下的复合绝缘子老化问题而言，本文系统地阐述了盐离子渗透导致硅橡胶化学降解的原理，像硅氧烷主链Si-O-Si键水解断裂、阻燃填料ATH溶出以及微孔形成这些过程。重点分析温湿度循环、污染物积聚及电场应力多场耦合对绝缘性能的影响，指出湿热环境促使离子迁移加速，电场畸变引发局部放电，进而导致材料介电损耗增加、体积电阻率降低以及闪络电压下降。全面梳理表面功能化防护技术（如微纳分级结构超疏水涂层）和智能运维策略（无人机光谱检测与高压射流清洁），并指出它们在动态盐雾环境中的适用范围和技术局限 ...
武轶 +5 more
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Gaoya dianqi, 2023 为准确掌握直流偏磁下电力变压器铁心的振动特性，文中通过建立变压器电磁—结构多物理场耦合有限元分析模型，计算了变压器直流偏磁前后铁心磁通密度分布和励磁电流，分析了麦克斯韦力和磁致伸缩力作用下不同直流偏磁时的铁心振动特征，定义了S变换相对能谱熵来描述变压器铁心振动随直流偏磁程度的变化规律。对某500 kV三相五柱式自耦变压器的仿真计算结果表明，随着直流电流增加，变压器铁心振动幅值增大，振动频谱分量增多，但随后呈现饱和趋势，且铁心心柱和旁柱振动信号的S变换相对能谱熵变化各异 ...
宋奇珂, 王丰华
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Immunomagnetic Separation of Salmonella Typhimurium Based on Microfluidic Chip [PDF]
This study developed an immunomagnetic separation microfluidic system for rapid isolation and enrichment of Salmonella typhimurium. The system consisted of a microfluidic chip, a microcontroller, and an electromagnetic separation and mixing module, which
JIN Yan, WANG Jingyi, CHENG Jianing, YU Lemin, ZHANG Bichen, ZHANG Yibo, XU Tongyu
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He jishu随着天文观测数据日益增多，通过数据驱动的方法推断中子星物质的状态方程成为一种可行的方案。本文采用贝叶斯推断和天体物理观测约束相对论平均场（Relativistic Mean Field，RMF）模型，并以此为基础，研究了核状态方程（Equation of State，EOS）和中子星结构。通过分析不同交点密度下与耦合常数密度依赖行为，发现较高的交点密度加强了天体物理观测数据对物态方程的约束，导致大质量中子星的中等密度行为变软，中心能量密度增加。特别地，我们发现包括在大质量中子星核中，声速平方超过共形极限（
谢 文杰, 夏 铖君
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A survey on intelligent computing interconnection [PDF]
As model parameters surpass the trillion-scale mark, intelligent computing interconnection faces technical challenges including ultra-large-scale networking, low-latency communication, and high-bandwidth synchronization multidimensional evaluation.
CHEN Yongming +3 more
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Research progress of floating multi-energy combined power generation device [PDF]
Marine renewable energy has broad application prospects. Compared with the single energy utilization device, the floating multi-energy combined power generation device can better realize the optimal allocation of resources and reduce the development cost
Bo NIU +4 more
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Kongjian kexue xuebao当前业务中对未来3天Kp指数预报需求强烈. 但地磁暴中多参数耦合导致难以量化各预报因子对Kp值的贡献, 制约了预报精度提升. 本文构建了神经网络3天Kp指数预报模型, 并使用人工智能(AI)可解释性算法定量化各因子贡献. 结果显示, 行星际磁场南向分量在提前3 h对Kp指数的贡献为37.15%, 为主要因子, 说明模型能捕捉符合物理特征的主要预报因子.
王 听雨 +5 more
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Current status and prospects of technological development for batch transportation of methanol via product oil pipelines [PDF]
ObjectiveWith the accelerated implementation of carbon peaking and carbon neutrality strategies, the consumption mix of traditional oil and gas resources has undergone significant changes, reflected in a slowing growth rate of oil and gas demand and a ...
Kuirong LIU, Weibin WANG, Yuxing LI
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Gaoya dianqi高压气体绝缘开关设备（GIS）在运行时易产生外壳环流，这会致使设备过热并加速绝缘材料老化。环流还可能干扰测量和保护装置，从而降低系统的供电可靠性。本文针对某±200kV换流站的GIS，研究其结构，深入分析感应电压产生和环流形成的机理；提出面向GIS设备外壳环流分析的场-路耦合模型，以及GIS相间汇流排电磁-流-热多物理场耦合模型；通过分析GIS外壳的感应电压产生机理以及环流路径，研究GIS在不同运行工况、不同接触电阻条件下的外壳环流分布和汇流排温度分布规律；通过与现场试验结果的比较 ...
茅鑫同 +7 more
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