广西容县浪水电站挖潜改造展望

广西容县浪水电站是一座以发电为主的多功能电站,在县电网和梯级开发中处于骨干和中心地位。近年来,随着工农业的迅猛发展和社会的需求,当地的用电量迅速增长,因此浪水电站需要进一步挖潜改造和扩容增效,以确保其在县电网中的地位和作用。     

铁路三线大桥帽梁无支架法施工技术及受力检算

帽梁施工采用无支架法施工相对满堂支架法施工而言,具有施工简便,对地面承载力无要求,节约大量钢管,降低施工成本,缩短工期等优点。文章针对洛湛铁路旺甫1号三线大桥设计出穿心棒无支架法施工帽梁的支撑系统方案,成功地解决了三线大桥因帽梁砼重量大、跨度长而致使常用材料不适合做承托梁的问题,并对支撑系统进行了受力检算。     

中国高速铁路客运产品设计

以形成完整的中国高速铁路客运产品设计方法体系为目标，从分析客运产品层次及要素出发．提出客运产品设计原则与总体思路。研究客运产品的设计方法，从可达性、时效性、便捷性和经济性四方面研究列车开行方案设计及调整，从自助式、人性化、差异化等六方面研究服务产品设计，并提出中国高速铁路品牌战略。     

金牛坪水电站二期泄水闸坝牛腿预制砼底模施工方案

金牛坪水电站二期泄水闸坝牛腿施工采用预制砼底模的施工方法，加快了施工进度，保证了金牛坪水电站二期工程的顺利完成。     

沪通铁路建设背景下的南通区位形势及交通行业影响预测

沪通铁路建设的帷幕在南通提出加快沿江沿海开发和建设长三角北翼经济中心的背景下正式拉开。沪通铁路工程将对南通地方交通格局及交通运输行业形成重要影响。文章将首先对南通地方交通体系的历史和现状作简要陈述,在此基础上,围绕沪通铁路的建设对完善南通地方交通体系格局的作用展开分析,然后就该工程对南通地方交通行业的影响作综合分析和预测。     

Modeling cascade dynamics of railway networks under inclement weather

Understanding the cascade dynamics of delay propagation under inclement weather is crucial to proactive railway management. In this paper, we proposed a Switching Max-Plus System (SMPS) to model the delay propagation on railway networks, which extends the conventional MPS by incorporating multiple system matrices to capture the dynamic impacts of inclement weather. An algorithm based on the All-Paired Critical-Path (APCP) graph was developed to solve the SMPS, which calculates secondary delays without backtracking the precedent events. The proposed model and its solution algorithm were validated using discrete-time simulations on both artificial and empirical networks. The robustness of railway services was also analyzed using the concepts of vulnerability and diffusivity.     

A direct comparison of physical block occupancy versus timed block occupancy in train timetabling formulations

Two fundamental mathematical formulations for railway timetabling are compared on a common set of sample problems, representing both multiple track high density services in Europe and single track bidirectional operations in North America. One formulation, ACP, enforces against conflicts by constraining time intervals between trains, while the other formulation, RCHF, monitors physical occupation of controlled track segments. The results demonstrate that both ACP and RCHF return comparable solutions in the aggregate, with some significant differences in select instances, and a pattern of significant differences in performance and constraint enforcement overall.     

Salary increases for the marketing executive

This article discusses how marketing executives view their pay raise. A study of 491 marketing executives examined their views on what is a meaningful salary increase and the reasons why their companies give pay raises.     

George Hudson's financial reporting practices: putting the Eastern Counties Railway in context

George Hudson was the most important railway promoter of his time. He had a particular aptitude for visualizing and arranging spectacular company and line amalgamations and his activities helped to bring about the beginnings of a more modern railway network. In 1849 he exercised effective control over nearly 30 per cent of the rail track then operating in the UK, most of it owned by four railway groups, the Eastern Counties Railway, the Midland, the York, Newcastle and Berwick, and the York and North Midland, before a series of scandalous revelations forced him out of office. The economic, railway and accounting literatures have treated George Hudson as an important figure in railway history, although concentrating largely on the financial reporting malpractices of the Eastern Counties Railway, while Hudson was its chairman, which were incorporated into the influential Monteagle Committee Report of 1849. Relatively little attention has been paid, however, to events at Hudson's other major companies. This paper analyzes the available evidence, particularly that produced by the Committees of Investigation established at all four railway groups, in order to provide a more balanced assessment of George Hudson's approach to financial reporting and thereby place events at the Eastern Counties Railway in a broader context.     

Get Ready for Innovation by Invasion

From many years of field research in West Germany and the United States, and especially from a recent study of relatively mature firms in Ohio, Gerhard Mensch has become aware of the disruption caused by the invasion of industries by new technologies from the outside. He sees the frequency of these invasions increasing in coming years for reasons that go beyond technological matters to the pressures for change coming from the capital markets. In this Perspective , he suggests the invasions can be countered and the capital markets satisfied by giving a more prominent role to the innovation manager in the strategy development process.