Results 1 to 10 of about 18,001 (167)
Dianci bileiqi, 2023 为了克服对套管进行固定周期停电检修的检修周期长、检修不精确等问题，探讨了高压套管的在线监测方案，给出了一种套管末端在线监测装置的设计方案，以保证及时发现套管设备绝缘缺陷，对保障电力系统安全运行具有重要意义。根据所设计的套管末端在线监测系统整体结构，介绍了监测系统中在线监测单元结构，以及在线监测单元结构中局部信号调理电路、高速采集电路以及电源功能电路的设计，最后通过测试实验，证明了在线监测系统可以实时监测高压套管运行状态，设计的在线监测装置具有稳定、准确、有效的特点。
谢佳 +5 more
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Dianci bileiqi, 2023 接地线是保护检修人员的一道安全屏障。在输配电线路上进行停电作业均须装设便携式接地线。针对便捷式接地线易受环境因素的影响，导致不能正确接地的情况。介绍了一种内置接地电阻检测仪的便捷式接地线装置。该装置基于STM32F4单片机并结合了卡尔曼滤波算法设计了可以实时检测接地电阻的便捷式接地线装置，通过通讯模块实时反馈接地电阻值到上位机判断便捷式接地线装置是否正确接地。便捷式接地线装置通过在无干扰下对阻值的检测，以及在不同频率干扰和土壤环境下的阻值检测。所得结果表明 ...
黄靖 +6 more
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Step-by-step classification detection algorithm of SPPM based on K-means clustering [PDF]
, 2022 In view of the high computational complexity in spatial pulse position modulation systems when using maximum likelihood detection algorithm, a step-by-step classification detection algorithm based on K-means clustering was proposed according to the ...
Huiqin WANG +5 more
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Gaoya dianqi, 2022 在役GIS盆式绝缘子因材质性能欠佳、机械操作振动等原因会引入气隙、金属微粒等各类缺陷，若不通过诊断提前预警并及时处理，极有可能引起突发性故障。X射线检测作为一种重要的可视化检测方法，在应用于在役GIS盆式绝缘子时存在检测效率低、结果不直观、存在检测盲区等问题。文中设计了在役GIS盆式绝缘子的X射线检测智能定位装置，开发了GIS盆式绝缘子缺陷检测的三维成像技术。结果表明，文中开发的X射线三维成像技术，可实现成像板及射线机的自动升降和多角度旋转控制、三维图像的智能重构以及GIS盆式绝缘子的全覆盖照射 ...
张国宝 +6 more
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Performance of Pt-Based Catalysts for Dimethyl Ether Catalytic Combustion [PDF]
, 2017 利用二甲醚催化燃烧作为二甲醚重整制氢的热源可有效简化系统和提高效率，通过对比不同载体、不同Pt负载量以及不同助剂对Pt催化剂的性能影响，筛选出了最适合二甲醚低温起燃催化燃烧的催化剂.研究发现，HZSM-5型分子筛作为二甲醚催化燃烧载体具有较好的起燃特性，同时加入助剂Ce可以显著提高催化剂活性，起燃温度相对Pt/HZSM-5降低了58℃.Pt-Ce/HZSM-5催化剂的二甲醚起燃特性实验表明，在过量空气系数为1.1时具有最佳的起燃特性.对Pt-Ce/HZSM-5催化剂进行了稳定性实验 ...
伊立其 +4 more
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Research progress on rapid determination of edible vegetable oil components [PDF]
, 2020 This paper summarizes the rapid detection methods of edible vegetable oil components from the aspects of analysis principle and application technology, such as simulation sensory analysis, spectral analysis, electromagnetic spectrum analysis and biochip ...
FAN Ting +4 more
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Research and application of process monitoring system in precision machining [PDF]
, 2015 随着材料科学和精密加工技术迅猛发展，高精度光学元件在光电、激光、航空航天、国防等高新技术领域扮演着越来越重要的角色。这些领域对元件加工精度和表面质量的要求也在逐步提高。当前精密加工技术的研究及应用发展水平已经成为衡量一个国家机械制造业乃至整个工业水平的重要依据之一。 当精密加工行业进入追求极限加工精度的年代以来，单纯的从提升加工设备精度的方法来提高元件的加工精度已经很难再实现质的突破，就现阶段国内制造水平而言，一味的追求加工设备精度将带来的是巨大的加工成本提升却不一定能在加工精度上得到满意的成果 ...
唐恰恒
core
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 4, Page 455-460, April 2026.ABSTRACT Objective To estimate the residual risk of maternal–fetal transmission after primary cytomegalovirus (CMV) infection in the periconceptional period or the first trimester in women treated with valacyclovir, and to assess whether the presence of glycoprotein B2 (gB2)‐specific immunoglobulin (Ig)‐G antibodies on immunoblot analysis refines fetal
K. O. Kagan +6 more
wiley +1 more source
Optimal control of multi-zone vav air-conditioning system [PDF]
, 2017 2006-2007 > Academic research: refereed > Publication in refereed journalVersion of ...
Wang, SW, Xu, XH
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source