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聂涛 《筑路机械与施工机械化》1991,8(5):31-33
本文介绍了沥青砼路面碾压设备的正确选择及使用以及影响沥青材料碾压效果的主要因素,提出了碾压沥青材料应注意的问题. 相似文献
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详细介绍了龙川北Ⅰ场调车机车监控记录系统的工作原理、设备组成、系统功能、控制方式以及试验效果,充分说明该系统的应用可行性。 相似文献
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文章结合广西路桥总公司员工内部培训工作实际,分析了企业内部培训工作的重要性,总结了广西路桥总公司内部培训工作所取得的成效,并针对存在的问题,提出了相应的改进措施。 相似文献
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陈昌荣 《筑路机械与施工机械化》1993,10(1):38-41
本文以1990年5月通过鉴定的“DM-55型闭路强制循环导热油加热沥青系统”成果为依据,就其产品的命名,工艺设备本身的安全性,可靠性、先进性等阐述了作者的观点,并对该成果的推广使用提出了几点建设性意见,最终提出了对科技成果,即新产品、新工艺、新设备的评价,要做到多种价值取向,多方位、多层次考虑,才可能利于其推广发展的新见解。 相似文献
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给出了光散射式数字粉尘测试仪浓度转换系数的具体标定步骤和计算公式,分析了测量结果误差的来源,并给出了误差分析的步骤和结果。结合光散射式数字粉尘测试仪的实际应用,总结了使用过程中应注意的事项。 相似文献
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文章基于广西发展内河水运的优势,介绍了广西西江建设应用"航电结合、以电促航、综合利用、滚动发展"内河建设模式的实践体会,指出了该内河建设模式在西江开发建设中取得的成效,同时探讨了采用该模式开发西江所存在的问题及相应的解决对策。 相似文献
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This study investigates the repeatability of ice-tank tests with broken ice. Ice-tank test campaigns normally do not perform multiple repetitions of tests with the same initial conditions. Therefore, the repeatability of ice-tank tests with broken ice is not well understood. Data from two test campaigns are analysed. The first test campaign studied the interaction between a 4-legged structure with a vertical waterline and several broken and intact level ice conditions. In the second test campaign, a ship hull geometry was tested. We analyse selected test cases from each test campaign. The ice-tank tests are reproduced using a 3-D discrete element method (DEM) model. Each analysed test case is simulated 20 times. The only difference between each simulation is the initial position of the ice floes. The numerical simulation results show that changes in the initial floe positions can cause large changes in the statistical properties of the ice load. Often, a single random interaction event can be identified that is responsible for the change in the results. Such interaction events can cause additional floe accumulation ahead of the structure, thereby influencing the load statistics for a large portion of the interaction length. The observed events occur both in the numerical simulations and in the physical ice-tank tests. This result indicates that ice-tank tests with broken ice have a poor repeatability; a change in an uncontrolled condition, such as the exact initial floe positions, can lead to a large variation in the experimental results. 相似文献