唐山中低速磁悬浮列车试验线牵引供电系统

为进行中低速磁悬浮列车的各项功能试验,在唐山修建了1.5 km的试验线.根据试验线系统的特点,阐述了其牵引供电系统供电电压制式的选择,牵引变电所的主接线、设计原则、负荷容量的计算方法及主要电气设备.通过设计和试验,掌握了中低速磁悬浮列车牵引变电系统的设计要求及设备选型原则.     

客车上水溢流改造技术探讨

针对客车上水溢流存在的问题开发了客车上水溢流控制装置。该装置分为车上和车下两部分。车上部分包括流量调节装置和液位显示控制仪,车下部分主要包括流量传感器、压力传感器及控制箱。并对该技术的改造方案和存在的问题进行了探讨。     

Critical success factors of supply chain integration in container shipping: an application of resource-based view theory

ABSTRACT

The container shipping industry is receiving growing attention in driving the performance of global supply chains. This phenomenon has accelerated supply chain integration (SCI) within the industry. Although SCI could offer numerous benefits, it is often quoted to be implemented easier in theory than in practice. The high failure rate that is associated with SCI is often not addressed in the literature. Grounded on resource-based view (RBV) theory, this paper is aimed at identifying the critical success factors (CSFs) and examining their influence on SCI and supply chain performance (SCP). Survey questionnaires were administered on 164 container shipping firms. The constructs were validated empirically using confirmatory factor analysis and were subsequently analysed using structural equation modelling. The proposed CSFs in this study are found to be positively corelated with SCI, which, in turn, is positively correlated with SCP. This paper has contributed to both theory and practice by applying RBV theory to identify the key resources and capabilities that are necessary for SCI in the container shipping industry.     

Behavior-consistent information-based network traffic control for evacuation operations

The evacuation operations problem aims to avoid or mitigate the potential loss of life in a region threatened or affected by a disaster. It is shaped to a large extent by the evolution of evacuation traffic resulting from the demand–supply interactions of the associated transportation network. Information-based control is a strategic tool for evacuation traffic operations as it can enable greater access to the affected population and more effective response. However, comparatively few studies have focused on the implementation of information-based control in evacuation operations. This study develops a control module for evacuation operations centered on addressing the demand–supply interactions by using behavior-consistent information strategies. These strategies incorporate the likely responses of evacuees to the information provided in the determination of route guidance information. The control module works as an iterative computational process involving an evacuee route choice model and a control model of information strategies to determine the route guidance information to direct evacuation traffic so as to approach a desired network traffic flow pattern. The problem is formulated as a fuzzy logic based optimization framework to explicitly incorporate practical concerns related to information dissemination characteristics and social equity in evacuation operations. Numerical experiments highlight the importance of accounting for the demand–supply interactions, as the use of behavior-consistent information strategies can lead evacuee route choices to approach the operator-desired proportions corresponding to the desired traffic pattern. The results also indicate that while a behavior-consistent information strategy can be effective, gaps with the desired route proportions can exist due to the discrete nature of the linguistic messages and the real-world difficulty in accurately modeling evacuees’ actual route choice behavior.     

轨道交通车载智能应急电源系统

作为在紧急情况下为轨道交通列车辅助系统供电的应急电源,铅酸或镍铬电池被普遍使用;随着技术的不断发展,锂离子电池的应用也越来越广泛.介绍了GJCL-A型锂离子轨道交通车载智能应急电源系统的组成、工作原理、设计方案及试点应用情况.GJCL-A型锂离子轨道交通车载智能应急电源系统的试验应用结果表明,用于车厢的110V应急供电4 300 s后,其剩余电量仍有40％以上.     

中频电源逆变换相失败保护的研究

分析了并联逆变型晶闸管中频电源产生换相失败的原因,提出老换相失败保护新措施,经过实验和实践结果表明,新措施对各种原因产生的换相失败均有保护作用,且简单实用、效果良好。     

公路隧道供配电设计午若干问题探讨

针对公路隧道供配电系统设计中存在的一些问题，结合实际工程中供配电系统的设计、施工及运营管理经验进行简要分析，并就公路隧道供配电系统的设计提出具体意见和建议，供设计、施工人员参考     

公路网络与区域发展协调研究

采用系统分析方法，通过目标分解分别建立公路网络和区域社会经济发展的供给与需求水平评价指标体系，定义综合评价函数、协调度、协调变化趋势指数等协调发展动态评价模型，并对协调程度的综合判断、发展趋势进行分析。     

汽车行业供应链中成员协作信任与冲突研究

我国汽车行业正处于创建自主品牌,从传统的供应链向电子化、信息化、同步化转型 过程中,信任与冲突是汽车供应链协同整合的关键因素.针对汽车行业供应链特性及发展趋 势,构建了基于契约信任、知识信任、信誉信任的跨组织信任协调机制,并构建了汽车行业 供应链成员协作信任机制与关系、流程、任务3种冲突的关系模型,研究了不同协作类型供 应链的信任与冲突,指出信息与知识共享是我国汽车行业供应链转型建立信任、解决冲突的 必要措施.     

整车试制阶段的电器故障诊断方法

以整车装车与跑车验证案例为背景，讨论汽车开发过程中汽车电器故障诊断的方法，阐述如何应用零部件置换原则来分析故障的重要性等级（significance）。