现代有轨电车的交通概述

本文论述现代有轨电车路权形式、车道布设方式、车站类型及站台布置位置交通要素的研究,这四个方面环环相扣,非相互独立,直接影响现代有轨电车及市政道路的通行效率。另外本文还阐述了现代有轨电车、机动车及行人的交通组织方面的研究。     

机械化驼峰场改造工程中的几个问题

对通辽南编组站驼峰调车场改造工程建设及施工过程中出现的几个方面的问题进行了较为透彻的分析,从建设管理的角度和专业技术方面介绍了经验,为今后编组站驼峰调车场改造工程设计、施工以及建设管理提供经验。     

地铁广告经营在不同发展阶段的着力点分析

分析地铁广告的独特价值属性,结合城市地铁发展的不同阶段及其广告开发经营的特点,从规划设计、合作方选取、战略规划制定、创新模式选择等方面,提出地铁广告开发经营在各发展阶段的着力点和侧重面。     

跨地铁深基坑燃气管道带气施工技术

高压燃气管道原位带气施工是高风险工程,在进行地铁安全施工的同时要保证管线的运营安全,目前尚无类似施工经验可借鉴。文章简要阐述横跨深圳地铁某车站的次高压燃气原位支托保护施工技术思路,并提出具体的实施方法。     

编组站CIPS统计报表子系统

统计报表子系统是编组站综合集成自动化系统(CIPS)的重要组成部分,CIPS统计报表子系统基于信息共享、管控一体化的综合自动化系统CIPS的统一信息平台,使用科学的统计方法和先进的统计手段,及时、准确、全面的收集编组站生产数据的真实信息,并在此基础上自动进行加工分析,产生多视角、多层次的统计报表。     

风道始发盾构的创新与实践

针对繁华城市街道下无法设置盾构始发井的难题,创新性地提出利用车站风道始发盾构的新思路,并已在沈阳地铁1号线工程中得到成功的应用,取得了较好的社会效益和经济效益,扩展了盾构工法的适用范围.     

汽车车身焊装线总体设计初探

分析了我国汽车工业的一些关键技术,如车身焊装线的设计、制造,由于依赖引进,它已成为制约汽车工业发展的“瓶颈”。在为国外设计的多条焊装线的实践中,总结了车身焊装总体设计时要注重考虑的7种因素,即生产能力、经济性、自动化程度、焊接工艺性、质量检测体系、整车装配性及安全保证体系等。     

Development of a generalised equivalent estimation approach for multi-axle vehicle handling dynamics

This paper devotes analytical effort in developing the 2M equivalent approach to analyse both the effect of vehicle body roll and n-axle handling on vehicle dynamics. The 1M equivalent vehicle 2DOF equation including an equivalent roll effect was derived from the conventional two-axle 3DOF vehicle model. And the 1M equivalent dynamics concepts were calculated to evaluate the steady-state steering, frequency characteristics, and root locus of the two-axle vehicle with only the effect of body roll. This 1M equivalent approach is extended to a three-axle 3DOF model to derive similar 1M equivalent mathematical identities including an equivalent roll effect. The 1M equivalent wheelbases and stability factor with the effect of the third axle or body roll, and 2M equivalent wheelbase and stability factor including both the effect of body roll and the third-axle handling were derived to evaluate the steady-state steering, frequency characteristics, and root locus of the three-axle vehicle. By using the recursive method, the generalised 1M equivalent wheelbase and stability factor with the effect of n-axle handling and 2M equivalent generalised wheelbase and stability factor including both the effect of body roll and n-axle handling were derived to evaluate the steady-state steering, frequency characteristics, and root locus of the n-axle vehicle. The 2M equivalent approach and developed generalised mathematical handling concepts were validated to be useful and could serve as an important tool for estimating both the effect of vehicle body roll and n-axle handling on multi-axle vehicle dynamics.     

基于CFD的某型船用柴油发电机组隔声罩内通风换热计算分析

本文基于某型船用柴油发电机组隔声罩内热源分析进行罩内空气冷却装置初步设计,应用FLUENT对隔声罩内温度场、流场进行计算分析,基于计算优化冷却装置布置。经样机试验实测,罩内温度分布与计算结果基本一致,各测点温度未超出罩内温度限值,保证机组安全可靠运行。     

Heterogeneous platoon flow dispersion model based on truncated mixed simplified phase‐type distribution of travel speed

Existing research on platoon dispersion models either describe homogeneous traffic flow feature, or are in lack of analytical solutions. By analyzing the field data, the truncated mixed simplified phase‐type distribution is proved to be capable of capturing the characteristics of heterogeneous traffic flow with an excellent fitting result. In light of this, we derive a generic heterogeneous platoon dispersion model with truncated mixed simplified phase‐type of speed in the forms of integrable functions. Numerical case studies are conducted to compare the performance of the proposed model and the conventional models (i.e., the Robertson model and truncated mixed Gaussian model). The results show that the proposed model not only better captures the platoon dispersion laws of heterogeneous traffic flow, but also presents higher computational efficiency, which provides practical implications on traffic signal control. Copyright © 2017 John Wiley & Sons, Ltd.