地铁规范与地铁安全保障

重点解析实施现行《地铁设计规范》是保障地铁安全的基础,同时指出保障地铁安全运营必须辅以严格的管理。     

3G时代轨道交通移动通信系统共址干扰分析

上海轨道交通民用通信系统的移动通信引入系统包含了GSM、CDMA、WLAN与所有3G系统,在站厅、站台和隧道区间共用一个分布系统的POI、天线和漏缆,因此必须控制系统间的干扰。系统间的干扰主要有杂散干扰、互调干扰、阻塞干扰等三种。分别对多系统共站、共缆产生干扰的机制、隔离度计算进行分析,并提出工程上消除对关键器件干扰的指标要求。     

绿色公路技术LCA评价体系及效益分析

针对各类绿色公路技术难以横向比较的问题,文章从技术可行性、经济效益、节能减排效益等方面,提出建立绿色公路技术LCA评价体系,并以G312苏州西段工程为例进行综合效益分析,其综合效益最为显著,具备规模化、资源化、投资适宜的绿色公路技术;技术瓶颈问题的突破和创新,是推进绿色公路发展的根本动力;将绿色理念融入公路建设的全生命周期的前提,是因地制宜的前期规划布局研究,也是合理选择适宜绿色公路技术的基础。     

Competitiveness of container terminal operating companies in South Korea and the industry–university–government network

Burgeoning container port facilities have fostered intensified competition among container terminal operating companies (CTOCs). However, despite research into their survival strategies which identified antecedents of competitiveness including hard factors such as facilities, available cargo and cargo processing ability, softer factors spanning human resource management, networks and strategic alliances with universities and government agencies in industry–university–government (I–U–G) networks have been overlooked. This study aims to examine both hard and softer antecedents of competitiveness as perceived by 152 professionals in South Korean CTOCs; empirical relationships among these antecedents, I–U–G networks, and competitiveness itself; and the significance of the I–U–G network in establishing and improving competitiveness. Posited antecedents of competitiveness included human resources, facilities, service quality, customer orientation, reputation, and government support policy as independent variables; the I–U–G network as a moderating variable; and competitiveness as a dependent variable. Empirical structural relationships revealed that excepting government support policy, each variable significantly affected CTOC competitiveness. Further, the I–U–G network moderated the relationships between the antecedents of competitiveness and competitiveness. Because an effective I–U–G network was pivotal in controlling CTOC competitiveness, improved competitiveness requires not only differentiation of human resources, facilities, service quality, customer orientation, and reputation factors but also I–U–G network developments.     

DF7型机车的故障励磁控制系统设计

针对DF7型机车车载微机(或者电子恒功率调节器)出现故障时改用故障励磁控制系统的固定励磁电流存在的缺陷,提出改用故障恒功励磁器方案,介绍了故障恒功励磁器原理,给出了水阻试验和正线试车情况,表明故障恒功励磁器可保障机车安全稳定牵引运行。     

5G技术在铁路通信系统的应用

对于铁路行业来说,5G将是未来铁路移动通信系统(简称"FRMCS")的重中之重,是GSM-R(铁路移动通信全球系统)的继承者,也是ATO(列车自动驾驶)的推动者.     

不等保护喷泉码用于应答器报文编码的可行性研究

提出将具有不等差错保护特性数字喷泉码作为欧标高速铁路应答器报文编码方案.由于其不依赖重传、译码过程与编码符号到达译码端次序无关等特性非常适于应答器报文传输场景.针对欧标应答器报文长度特征,本文在不同码长条件下对基于权重的不等差错保护算法、拓展窗口喷泉码及复制窗口不等保护算法的性能进行对比分析,通过Matlab仿真得到3种算法在不同码长条件下的性能.验证采用基于喷泉码的不等差错保护方法作为铁路应答器长报文编码方案的可行性.     

紧急疏散情况下地铁车站动态瓶颈识别

随着城市轨道交通系统逐渐成网,地铁车站日渐拥挤,为了制定科学有效的紧急疏散方案,有必要预先找到车站瓶颈点。基于时间可靠度函数模拟乘客在紧急情况下路径选择行为,在此基础上引入M//G/C/C排队模型对车站排队系统各个服务台进行排队性能指标计算,找出潜在瓶颈点。以广州地铁3号线岗顶站为例,结合车站硬件设施尺寸数量,模拟计算最恶劣情况下乘客疏散过程,找到3处潜在瓶颈点,测算结果与实际观测情况相符合,验证了该方法的有效性。     

在电气化弓网离线噪声环境下GSM-R差错控制及传输性能分析

针对弓网电磁噪声对GSM-R的干扰,采用交织技术和RS-Turbo编码建立了GSM-R抗干扰信道模型,改善GSM-R差错控制方式。从仿真结果分析得出,采用的信道模型可以降低此类噪声干扰,降低系统误码率。     

电动汽车V2G关键技术研究综述

V2G(Vehicle-to-grid)技术能够优化能源效率,参与电网调度,促进电网的安全性、稳定性、可靠性和经济性。文章首先阐述了V2G的概念,其次从电动汽车储能应用研究、电动汽车可调度容量研究和电动汽车移动储能对于配网影响及其协同控制研究等三个方面,综述了国内外V2G技术的研究状况。最后介绍了国内外部分有关V2G的示范应用,并对V2G关键技术的国内外研究状况进行了总结。