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低压断路器进线方向与断流容量问题
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《电工文摘》 2009年第1期57-59,共3页
文章讨论我国低压电器品种、规格及性能方面存在的难以满足实际工程技术要求的若干问题、并提出进行改进与开发的建议。
关键词 低压电器隔离进线方向 断相保护 安全开关
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邹议低压电器的几个亟待解决的问题 被引量:1
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作者 包宏栋 《大观周刊》 2010年第41期92-92,共1页
文章讨论我国低压电器品种、规格及性能方面存在的难以满足实际工程技术要求的若干问题、并提出进行改进与开发的建议。
关键词 低压电器 隔离 进线方向 断相保护 安全开关
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低压电器中急需解决的问题
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作者 陈满生 田辉鹏 罗琦 《黑龙江科技信息》 2002年第9期50-50,共1页
本文讨论我国低压电器元件的品种、规格及性能方面存在的不能满足实际工程技术需要的几个问题、并提出改进和开发的建议。
关键词 低压电器 元件规格 刀开关 安全开关 进线方向
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我国低压电器的几个亟待解决的问题
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作者 黄扬云 郭俊 《江西化工》 2006年第2期74-76,共3页
文章讨论我国低压电器品种、规格及性能方面存在的难以满足实际工程技术要求的若干问题。
关键词 低压电器 隔离 进线方向 断相保护 安全开关
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The effect of mining face's direction on the observed seismic activity 被引量:8
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作者 Witold Pytel Joanna Switon Adrian Wojcik 《International Journal of Coal Science & Technology》 EI 2016年第3期322-329,共8页
A major natural hazard associated with LGOM (Legnica-Glogow Copper Mining) mining is the dynamic phenomena occurrence, physically observed as seismic tremors. Some of them generate effects in the form of relaxations... A major natural hazard associated with LGOM (Legnica-Glogow Copper Mining) mining is the dynamic phenomena occurrence, physically observed as seismic tremors. Some of them generate effects in the form of relaxations or bumps. Long-term observations of the rock mass behaviour indicate that the degree of seismic hazard, and therefore also seismic activity in the LGOM area, is affected by the great depth of the copper deposit, high-strength rocks as well as the ability of rock mass to accumulate elastic energy. In this aspect, the effect of the characteristics of initial stress tensor and the orientation of considered mining panel in regards to its components must be emphasised. The primary objective of this study is to answer the question, which of the factors considered as "influencing" the dynamic phenomena occurrence in copper mines have a statistically significant effect on seismic activity and to what extent. Using the general linear model procedure, an attempt has been made to quantify the impact of different parameters, including the depth of deposit, the presence of goaf in the vicinity of operating mining panels and the direction of mining face advance, on seismic activity based on historical data from 2000 to 2010 concerned with the dynamic phenomena recorded in different mining panels in Rudna mine. The direction of mining face advance as well as the goaf situation in the vicinity of the mining panel are of the greatest interest in the case of the seismic activity in LGOM. It can be assumed that the appropriate manipulation of parameters of mining systems should ensure the safest variant of mining method under specific geological and mining conditions. 展开更多
关键词 Induced seismicity Polish copper mines General linear model procedure
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浅谈我国低压电器存在的问题 被引量:1
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作者 徐媛媛 胡兴华 《才智》 2011年第7期82-82,共1页
文章讨论我国低压电器品种、规格及性能方面存在的难以满足实际工程技术要求的若干问题。
关键词 低压电器 进线方向 断相保护 安全开关
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