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给出了所研制的铁路信息微机在线检测系统的工作原理,本系统适用于中小型信号站,具有成本低,使用维护等方便等优点。 相似文献
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1 问题的提出 传统活塞式发动机活塞上须装有多道开口互相错开的活塞环,以密封气缸,达到热能转变成机械能并进行热传导和防止润滑油窜入燃烧室的功能. 相似文献
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In order to study the diffusion law of grouting slurry in the water-rich sand layer under flowing water conditions, a grouting test model consisting of a main test system, a grouting system, and a measurement system was developed. And for detecting the diffusion scope of the grouts, a new resistivity method was proposed. It is found that the relationship between grouting pressure and grouting rate during the test is strong. Under hydrodynamic conditions, the grouting slurry diffuses elliptically. Due to gravity and the effect of the upper water flow, the center of gravity of the ellipsoid is below the grouting outlet, and the grouting effectively improves the physical and mechanical properties of water-rich sand bodies. At the same time, the resistivity method has a good application effect on the detection of grouting diffusion range. The range of slurry diffusion obtained by the resistivity method is basically consistent with the boundary of the stone body after excavation, indicating that the resistivity method is reliable for detection of grouting range in dynamic water-rich sand layer. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved. 相似文献
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寇世忠 《郑州铁路职业技术学院学报》2009,21(2):59-61
英语修辞属于人文修辞的范畴,从其纵向发展的观点来看,它包括两个基本侧面:一是交际修辞,一是美学修辞。交际修辞在内容的表达上偏重于平均缜密、严谨妥帖,总体上讲究逻辑思维,叙述准确,辩辞入理,以有效地发挥语言的交际功能;美学修辞在运用逻辑思维的同时,则偏重于随景应情,运用想象和联想,通过辞格唤起生动的意象,使语言文字生动活泼,意蕴优美,发挥更大的感染力和说服力,以取得艺术性的表达效果。 相似文献
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