Results 71 to 80 of about 3,974 (162)
Gaoya dianqi, 1990 本文通过阻容直流电路模型,对SF6高压电器的双层气密结构的漏气建立过程及其密封原理和密封水平进行了模拟计算,并借助于努森（Knudsen）定律进行了分析。证实了通过双层气密结构的漏气建立过程为指数曲线变化过程,其密封水平高于单层气密结构,漏气率随设备内部充气压力增加而增加的比率较小。
邹昌树
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A Fundamental Experiment on Detecting Deficiency of Concrete Structure with Infrared Thermography [PDF]
, 1992 The deficiency inside concrete stuctures which induces deterioration of concrete strutures is a serious problem all over the world. In many cases, the deficiencies are hidden inside the concrete structures, and it is inpossible to observe the ...
大田 哲男 +2 more
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Gaoya dianqi, 2013 污秽等级评定方法是绝缘子泄漏电流在线监测系统的重要研究内容,等值附盐密度是确定污秽等级的唯一依据,而泄漏电流与绝缘子表面污秽状况密切相关。笔者采用最小二乘支持向量机（LS-SVM）方法,建立以泄漏电流有效值、泄漏电流峰值、脉冲电流次数、环境湿度、温度5个变量作为输入参数,ESDD作为输出参数的智能预测模型。实验结果表明,该方法有效、模型预测精度高,能实现绝缘子表面污秽程度在线评估。
史丽萍, 祝艳华, 朱宁坦
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Epidemiological characteristics of stroke incidence from 2017 to 2022 in Songjiang District, Shanghai [PDF]
ObjectiveTo investigate the prevalence of stroke in Songjiang District from 2017 to 2022, to analyze the epidemiological characteristics of stroke incidence, so as to provide a scientific basis for the formulation of stroke prevention and control ...
HE Jingyi +8 more
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Gaoya dianqi, 1976 为了防止内部流体泄漏和外部杂物混入的机构,统称为密封装置。用于固定部分的密封装置,称为固定密封(或称静密封)。用于运动部分的,称为动密封。 密封技术在高压断路器的制造中,占据着相当重要的位置。如果密封不良,就会造成断路器内部流体的泄漏,或者外部杂物的侵入。
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Dianci bileiqi, 2005 介绍了国内外绝缘子泄漏电流在线监测的原理,对不同监测方案的各个过程进行了比较分析,得出其优缺点。在分析原有方案的基础上进行了一定的改进,提出了方案中某些值得注意的问题。并给出了绝缘子泄漏电流在线监测的若干发展方向。
严玉婷 +3 more
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Information Disclosure and the Fair Acquisition Price of Start Ups [PDF]
, 2014 Kita, Masanobu
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Review of bypass systems for various power generation units [PDF]
Bypass systems are important auxiliary systems in different types of power generation units. This study assesses and reviews the fundamental principles, components, classifications, capacities, and functions of bypass systems.
Wen LI +3 more
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Gaoya dianqi, 2016 针对GIS设备SF6气体泄漏问题,文中将包扎法粗略估计与红外检漏法精确定位两种检测手段相结合,参照设备内部结构,根据现场实践经验,提出了一种利用故障树查明泄漏根源的分析方法。同时,制定出有针对性的预防措施,从设计制造工艺、安装工艺和日常维护等方面总结经验,加以改进,避免类似故障再次发生,具有一定的应用价值。
刘建月, 张志东, 李秀广
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Entry Strategy by Online in Professional Service Business: From a Viewpoint of Justice Theory [PDF]
, 2016 Kita, Masanobu
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