城市轨道交通客流密集度指数研究

基于轨道交通物联网监测数据，从点、线、面三个层级，构建不同时间粒度车站、线路、网络的客流密集度指数计算模型和算法。车站客流密集度指数模型综合考虑影响车站密集度指数的关键区域（出入口、站台、楼扶梯、换乘通道）的拥挤程度和拥挤范围因素；线路的客流密集度指数模型综合考虑车站和区间的影响；网络的客流密集度指数模型由各线路的客流密集度指数加权得到。测试结果表明，提出的模型计算结果与实际地铁客流出行规律一致，可较好地反映地铁拥挤程度，为地铁客流运营拥挤状态评价和辅助决策提供技术支持。     

船舶喷射推进技术发展综述

船舶喷射推进与传统的螺旋桨推进相比具有诸多优点,因而在一些高速、高性能舰船、潜艇上得到越来越多的应用.介绍了国内外船舶喷射推进技术的研究发展情况,分析了泵压喷水推进和水冲压喷射推进的基本原理和特点,以及新型喷射推进技术的研究概况,通过总结分析了国内外喷射推进技术的研究进展,指出新型喷射推进技术是今后舰船推进技术发展的一个重要方向.     

连续梁桥临时支撑拆除时机分析

针对挂篮悬臂浇筑施工的PC连续箱梁桥,结合实际工程,对其施工过程中及成桥后的内力、应力等方面进行对比分析,研究临时支撑于中跨合龙之前和之后拆除的差异.结果表明,针对工程的特定情况,采用临时支撑在中跨合龙之前拆除的工艺更合适.     

广州地铁网络化运营后的乘客信息发布水平提升措施

地铁步入网络化运营阶段后,客流量剧增,通达性增强,服务范围和运营信息量增大,对客运服务信息发布提出更高的要求。通过分析客运服务信息发布的现状及网络化运营后面临的风险和难点,提出优化应急信息发布渠道和范围、采用智能化手段提升信息发布水平、加强乘客多路径出行引导、新增快慢车宣传指引等提升措施,以满足乘客的知情权及出行需求,提高网络化运营服务质量。     

Experimental study on a model azimuthing podded propulsor in ice

The objective of this study was to investigate the performance of a model azimuthing podded propulsor in ice-covered water. Model tests were carried out with two different depths of cut into the ice (15 and 35 mm), two different ice conditions (presawn and pack ice conditions), and four different azimuthing angles. The depth of cut is the maximum penetration depth of the propeller blade into the ice block. The 0.3-m-diameter model propeller was operated in a continuous ice milling condition. Ice loads were measured by several sensors which were installed in various positions on the model. Six one-axis pancake-style load cells on the top of the model measured the global loads and two six-component dynamometers were installed on the shaft to measure the shaft loads. One six-component dynamometer was attached to the one of the propeller blades inside the hub to measure the blade loads. The pod unit and propeller performance in ice are presented. Ice-related loads, which were obtained when the blade was inside the ice block, are introduced and discussed. During the propeller–ice interaction, a blade can experience the path generated by the previous blade, which is called the shadowing effect. The effects of shadowing, depth of cut, azimuthing angle, and advance coefficient on propulsor performance are presented and discussed.     

TW系统常见报警的分析及判别方法

就TW系统溜放中误报警、调车进路中信号因故关闭和减速器前路追钩或减速器上追钩误报警这些常见的故障现象进行分析,有助于电务维护人员和TW系统的售后服务人员及时对故障进行判断和处理。