50,861 research outputs found
A review of key planning and scheduling in the rail industry in Europe and UK
Planning and scheduling activities within the rail industry have benefited from developments in computer-based simulation and modelling techniques over the last 25 years. Increasingly, the use of computational intelligence in such tasks is featuring more heavily in research publications. This paper examines a number of common rail-based planning and scheduling activities and how they benefit from five broad technology approaches. Summary tables of papers are provided relating to rail planning and scheduling activities and to the use of expert and decision systems in the rail industry.EPSR
Assessment Methods for Innovative Operational Measures and Technologies for Intermodal Freight Terminals
The topic of freight transport by rail, is a complex theme and, in recent years, a main issue of European policy. The legislation evolution
and the White Paper 2011 have demonstrated the European intention to re-launch this sector. The challenge is to promote the intermodal
transport system to the detriment of road freight transport. In this context, the intermodal freight terminals play a primary role for the
supply chain, they are the connection point between the various transport nodes and the nodal points where the freight are handled,
stored and transferred between different modes to final customer. To achieve the purpose, proposed by the EC, are necessary the
performances improvement of existing intermodal freight terminals and the development of innovative intermodal freight terminals.
Many terminal performances improvement is have been proposed and sometime experimented. They are based both on operational
measures (e.g. horizontal and parallel handling, faster and fully direct handling) and on innovative technologies (e.g. automatic system
for horizontal and parallel handling, automated gate for data exchange) inside the terminals, with often-contradictory results. The
research work described in this paper (developed within the EU project Capacity4Rail) focusses on the assessment of effects that these
innovations can have in the intermodal freight terminals. The innovative operational measures and technologies have been combined in
different scenarios, to be evaluated by a methodological approach including to other an analytical methods and simulation models. The
output of this assessment method are key performance indicators (KPI) setup according to terminals typologies the proposals and related
to different aspects (e.g. management, operation and organization. In the present work suitable KPIs (e.g. total/partial transit times) for to
evaluate have been applied. Finally, in addition to methodological framework illustrated, a real case of study will be illustrated: the
intermodal rail-road freight terminal Munich-Riem (Germany)
An intelligent framework and prototype for autonomous maintenance planning in the rail industry
This paper details the development of the AUTONOM project, a project that aims to provide an enterprise system tailored to the planning needs of the rail industry. AUTONOM extends research in novel sensing, scheduling, and decision-making strategies customised for the automated planning of maintenance activities within the rail industry. This paper sets out a framework and software prototype and details the current progress of the project. In the continuation of the AUTONOM project it is anticipated that the combination of techniques brought together in this work will be capable of addressing a wider range of problem types, offered by Network rail and organisations in different industries
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Using formal methods to support testing
Formal methods and testing are two important approaches that assist in the development of high quality software. While traditionally these approaches have been seen as rivals, in recent
years a new consensus has developed in which they are seen as complementary. This article reviews the state of the art regarding ways in which the presence of a formal specification can be used to assist testing
Dependability checking with StoCharts: Is train radio reliable enough for trains?
Performance, dependability and quality of service (QoS) are prime aspects of the UML modelling domain. To capture these aspects effectively in the design phase, we have recently proposed STOCHARTS, a conservative extension of UML statechart diagrams. In this paper, we apply the STOCHART formalism to a safety critical design problem. We model a part of the European Train Control System specification, focusing on the risks of wireless communication failures in future high-speed cross-European trains. Stochastic model checking with the model checker PROVER enables us to derive constraints under which the central quality requirements are satisfied by the STOCHART model. The paper illustrates the flexibility and maturity of STOCHARTS to model real problems in safety critical system design
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