共查询到19条相似文献,搜索用时 125 毫秒
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判断色谱分析数据准确与否,一般采用校对试验的方法。本文总结了两年来组织校对试验的经验,谈了校对试验的必要条件、校对试验的内容和方法,及以校对试验结果的处理和统计等。 相似文献
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通过分析阐述校对工作的基本性质和作用,指出校对工作在期刊出版业的重要性,强调从事期刊校对工作者的基本素质要求,并提出要树立“现代校对”观念,加大必要的科技投入,使期刊校对工作更加适应新形势的需要。 相似文献
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针对变压器微机纵差保护中的电流互感器比例系数的调整以及互感器接线极性校对等问题 ,介绍了几种自适应方案。对于零序差动保护的CT极性检测和校对问题 ,文中提出了两种自适应参考方案以供探讨。 相似文献
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针对变压器微机纵差保护中的电流互感器比例系数的调整以及互感器接线极性校对等问题,介绍了几种自适应方案。对于零序差动保护的CT极性检测和校对问题,文中提出了两种自适应参考方案以供探讨。 相似文献
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在230~500kV变电站安装了测量准确度高的耦合电容式电压互感器,它必须在现场进行校对。若干年前,美国国家标准局研制了一台现场用的校对装置,其误差为±0.1%和±0.3毫弪。 相似文献
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<正>电能表运行管理是农网配电台区线损管理工作中的重要一环,按照电能表校对周期,5年至少校对一次,表计拆除后轮校周期长,全地区表计的轮校工作量大,且影响用户供电可靠性。目前市场上销售的电能表现场校对仪 相似文献
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介绍了一种可用于电力变压器的无线电干扰电压测量方法-直接校对法,叙述了其原理,测量线路和测量方法等。 相似文献
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论述内应力松驰法直轴的原理过程及在直轴过程中一些值得注意的主要问题,并用电厂直轴的实例具体说明了这种方法稳定可靠. 相似文献
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回顾了《电力系统通信》从创刊至今32年走过的历程,今天,这本刊物已经成为电力系统通信专业唯一的、具有较强影响力的技术刊物。文章从期刊的版式演变、栏目设置、论文质量和发行等方面全面总结了期刊的发展,旨在从一个侧面映射出我国改革开放30年电力通信的飞速发展和电力行业所取得的辉煌成就。 相似文献
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滑动轴承是燃气轮机、蒸汽轮机、压缩机等重型旋转机械中的关键部件,其安全稳定运行具有重大的经济意义。该文提出将电容层析成像技术用于滑动轴承润滑油膜分布的监测。根据滑动轴承的特点,设计特殊的传感器结构。将轴颈设为特殊的传感器电极,与轴瓦上的常规电极共同形成电极阵列,对轴颈和轴瓦间的环形空隙区域成像。对设计的传感器结构建立有限元模型,计算传感器电容、电极对灵敏场等,以分析传感器的特性。采用LBP和Landweber 2种算法重建滑动轴承润滑油膜分布图像,重建算法能较好地重建设定油膜分布下的图像。 相似文献
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The paper has introduced the Journal 'Advanced Technology of Electrical Engineering and Energy', presented its main journal evaluation indexes. The result indicates that the journal has made great progress in recent years. It gives much info. about the journal to authors. 相似文献
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The paper presented the statistics and analysis on papers published on the journal 'Advanced Technology of Electrical Engineering and Energy' from 1996 to 2008: the paper acceptance rate,the paper category,the first author's affiliations,the top 7 first authors,the top 10 coauthors and also the journal evaluation indexes of the journal.It offers details of the journal to anyone interested,especially to our editorial board and our broad readers. 相似文献
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To visualize the physical processes that occur in the journal bearings of the shafting of power generating turbosets, a technique for preliminary calculation of a set of characteristics of the journal bearings in the domain of possible movements (DPM) of the rotor journals is proposed. The technique is based on interpolation of the oil film characteristics and is designed for use in real-time diagnostic system COMPACS®. According to this technique, for each journal bearing, the domain of possible movement of the shaft journal is computed, then triangulation of the area is performed, and the corresponding mesh is constructed. At each node of the mesh, all characteristics of the journal bearing required by the diagnostic system are calculated. Via shaft-position sensors, the system measures—in the online mode—the instantaneous location of the shaft journal in the bearing and determines the averaged static position of the journals (the pivoting vector). Afterwards, continuous interpolation in the triangulation domain is performed, which allows the real-time calculation of the static and dynamic forces that act on the rotor journal, the flow rate and the temperature of the lubricant, and power friction losses. Use of the proposed method on a running turboset enables diagnosing the technical condition of the shafting support system and promptly identifying the defects that determine the vibrational state and the overall reliability of the turboset. The authors report a number of examples of constructing the DPM and computing the basic static characteristics for elliptical journal bearings typical of large-scale power turbosets. To illustrate the interpolation method, the traditional approach to calculation of bearing properties is applied. This approach is based on a Reynolds two-dimensional isothermal equation that accounts for the mobility of the boundary of the oil film continuity. 相似文献