铁路车站货物发、到管理信息系统的设计与实现

依托既有的网络优势,对货运到达收费和货运制票系统的数据进行汇总、分析,拓展数据共享的功能.探索和尝试基层货运系统的开发与应用.     

铁路动态信息共享Web服务调用框架

J2EE体系结构已经成功地引入铁路信息共享研究中来,并对铁路信息共享研究产生了巨大的推动作用.在此基础之上,将新兴的Web服务技术引入铁路信息共享研究,并提出相应的调用框架,可进一步扩展铁路信息共享的范围.     

Influence of the design constraints on the thickness optimization of glass panes to achieve lightweight insulating glass units in cruise ships

The increasing complexity and size in cruise ships demands for lightweight structures and practical but accurate design methods. Conventionally, the focus has been on the steel parts of the ship, as they make most of its weight. However, the proportions of other materials are increasing. Therefore, this study attempts to provide better understanding how one could reach the lightweight designs of insulating glass units (IGUs) in ships. These are windows where at least two glass panes are separated by a hermetically sealed cavity. They are thin-walled structures that benefit not only from the geometrically nonlinear behavior, but also from the load sharing. Considering these effects, their behavior is studied using the nonlinear Finite Element Method and Particle Swarm Optimization. Different design criteria are imposed on the thickness determination of the glass panes with different shapes. Rectangular, triangular, and circular shapes are considered. The results show that the triangular shapes have the least weight for a given area when the deflection criterion is the dominating one. When maximum principal stress is the thickness defining criterion, the shapes perform almost equally well. The ratio between the pane thicknesses had the most influence on the behavior of the IGU. As it increases, i.e., one pane is significantly thicker than the other, the load sharing percentage drops, but it provides the most lightweight solution. Closer it is to 1, more equally the structural stresses are divided between the panes, i.e., redundancy is achieved. Finally, it is possible to establish a simple but effective method for the thickness determination of these IGUs using the results of this study. However, more work is required, including numerical analysis and experimental testing.     

自行车专用路设计要点分析

近年来绿色、低碳交通是国际发展趋势，是世界范围内发展的共识。国内也正在大力推进绿色交通发展，完善绿色低碳交通体系，打造绿色交通示范工程。北京市修建了昌平回龙观至海淀上地地区自行车专用路工程，道路开通运营后，以其安全舒适的出行环境、便捷高效的通勤效率、以人为本的设计理念，迅速成为一条“网红”道路，得到广大市民和国内外舆论的高度认可。在目前国内相关规范标准并不完善的情况下，通过昌平回龙观至海淀上地地区自行车专用路工程实践，对设计要点进行系统梳理分析和总结。针对自行车专用路设计要点，详细说明了自行车专用路的交通需求分析、线型关键指标的选取、交叉口设计原则、标识指引系统的分级分类以及配套的助力系统、停车设施、休息驿站、监控、广播、计数、求助报警对讲系统的设计思路，尤其是关键线型指标的选取，并对国内外相关规范进行了整理罗列。