期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
The Use of Tamping Machine for Diagnosising the Longitudinal Forces in Rails of CWR Track
1
作者 Wladyslaw Koc Andrzej Wilk +1 位作者 Slawomir Grulkowski Piotr Chrostowski 《Journal of Civil Engineering and Architecture》 2010年第11期11-25,共15页
In the novel approach to the diagnostic tests of continuous welded rail (CWR) track by the use of the tamping machine, the fundamental statement related to the recording of the curvature with a definite value of the... In the novel approach to the diagnostic tests of continuous welded rail (CWR) track by the use of the tamping machine, the fundamental statement related to the recording of the curvature with a definite value of the lateral displacement being subjected to verification, can provide a basis for the determination of the longitudinal axial force in the rail. An attempt has also been made to define an alternative factor which by means of the measured signals, could be used for the determination of the axial forces in the rail sections. A power engineering approach has been adopted to this concept. Within the framework of the experimental investigations, measurements were carried out in the track test section. The investigations were based on stretching the rail sections by stretchers and on lateral displacements of the track by the tamping machine. The operation of the measuring apparatus was also tested in the experimental railway track section while carrying out the geometrical adjustments by the tamping machine. As a result of next series of the investigation carried out in 2006-2007, the authors worked out a procedure of estimating the longitudinal forces in rails of CWR track. 展开更多
关键词 CWR track longitudinal forces lateral displacements tamping machine measuring apparatus.
下载PDF
红外曲
2
作者 茹志鹃 《上海文学》 1978年第12期16-25,共10页
一我走进了一个神秘的世界,一个光的迷宫。不,不,绝不要以为这是个琳琅满目,晶莹灿烂的童话世界。这里有的是那种光,看不见的光,恩格斯称它为“暗的光”。感谢科学家们,那些已不在人世,但全人类都在运用他们的成果的科学家们。他们上天... 一我走进了一个神秘的世界,一个光的迷宫。不,不,绝不要以为这是个琳琅满目,晶莹灿烂的童话世界。这里有的是那种光,看不见的光,恩格斯称它为“暗的光”。感谢科学家们,那些已不在人世,但全人类都在运用他们的成果的科学家们。他们上天入地,以无可辩驳的实践,大胆地把太阳的光芒分开,成为七色,他们证实了热量最多,辐射最强的,并不在七色之中,而是在红色的外围。而在红外当中,又会有些什么呢?…… 展开更多
关键词 陈祖培 专家路线 内心世界 研究实习员 大字报 英特纳雄耐尔 红外照相机 知识分子 二十世纪 笔记本
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部