All Outputs (61)

Effect of venepuncture process design on efficiency and failure rates: a simulation model study for secondary care (2016)
Journal Article

Background: Healthcare aims to deliver good patient outcomes. For many clinical procedures there are multiple alternative task sequences that can be performed. These deviations can influence procedure reliability, efficiency of usage of hospital reso... Read More about Effect of venepuncture process design on efficiency and failure rates: a simulation model study for secondary care.

Bayesian belief networks for fault detection and diagnostics of a three-phase separator (2016)
Conference Proceeding

A three-phase separator (TPS) is one of the key components of offshore oil processing facili-ties. Oil is separated from gas, water and solid impurities by the TPS before it can be further processed. Fail-ures of the TPS can lead to unplanned shutdow... Read More about Bayesian belief networks for fault detection and diagnostics of a three-phase separator.

Extended Bow-Tie model for asset risk and reliability modeling: application to a passenger lift (2016)
Conference Proceeding

A risk and reliability modelling framework for railway assets based on the Petri Net and the Bow-Tie models is proposed in this paper. A Petri Net model together with the Monte Carlo simulation is used to replicate the projected operational usage of... Read More about Extended Bow-Tie model for asset risk and reliability modeling: application to a passenger lift.

Fault detection and diagnostics of a three-phase separator (2016)
Journal Article

A high demand of oil products on daily basis requires oil processing plants to work with maximum efficiency. Oil, water and gas separation in a three-phase separator is one of the first operations that are performed after crude oil is extracted from... Read More about Fault detection and diagnostics of a three-phase separator.

Reliability assessment techniques for medical procedures (2016)
Journal Article

Healthcare aims to deliver good patient outcomes. However deviations in the application of medical procedures can result in failure to deliver reliable care, variation in patient results, waste of hospital resources and increase of risk to staff and... Read More about Reliability assessment techniques for medical procedures.

Road maintenance planning using network flow modelling (2015)
Journal Article

This paper presents a road maintenance planning model that can be used to balance out maintenance cost and road user cost, since performing road maintenance at night can be convenient for road users but costly for highway agency. Based on the platfor... Read More about Road maintenance planning using network flow modelling.

Application of network traffic flow model to road maintenance (2015)
Journal Article

The study shows how the evolution of two-way traffic flows on a local highway network can be predicted over time using a network-level traffic flow model (NTFM) to model both urban and motorway road networks. After a brief review of the main principl... Read More about Application of network traffic flow model to road maintenance.

Pavement maintenance scheduling using genetic algorithms (2015)
Journal Article

This paper presents a new pavement management system (PMS) to achieve the optimal pavement maintenance and rehabilitation (M&R) strategy for a highway network using genetic algorithms (GAs). Optimal M&R strategy is a set of pavement activities that b... Read More about Pavement maintenance scheduling using genetic algorithms.

A fault detection method for railway point systems (2015)
Journal Article

Failures of railway point systems (RPSs) often lead to service delays or hazardous situations. A condition monitoring system can be used by railway infrastructure operators to detect the early signs of the deteriorated condition of RPSs and thereby p... Read More about A fault detection method for railway point systems.

Road network modelling for maintenance planning (2014)
Conference Proceeding

In this paper a novel road network flow model is presented, suitable for modelling both motor-way and urban roads. A road network is modelled using a directed graph, consisting of typical roads and junctions, with different traffic flow inputs throug... Read More about Road network modelling for maintenance planning.

A Petri net approach to fault verification in phased mission systems using the standard deviation technique (2014)
Journal Article

Health management systems are now standard aspects of complex systems. They monitor the behaviour of components and sub-systems and in the event of unexpected system behaviour diagnose faults that have occurred. Although this process should reduce... Read More about A Petri net approach to fault verification in phased mission systems using the standard deviation technique.

A network traffic flow model for motorway and urban highways (2013)
Journal Article

The research reported in this paper develops a network level traffic flow model (NTFM) which is applicable for both motorway and urban roads. It forecasts the traffic flow rates, queue propagation at the junctions and travel delays through the networ... Read More about A network traffic flow model for motorway and urban highways.

Fault propagation modelling for fluid system health monitoring (2011)
Journal Article

Fault diagnostics systems are incorporated to determine the health of the system they monitor. There are however times when the diagnostics system reports faults which do not exist. This situation commonly arises at system start-up when high vibrat... Read More about Fault propagation modelling for fluid system health monitoring.

An efficient phased mission reliability analysis for autonomous vehicles (2010)
Journal Article

Autonomous systems are becoming more commonly used, especially in hazardous situations. Such systems are expected to make their own decisions about future actions when some capabilities degrade due to failures of their subsystems. Such decisions are... Read More about An efficient phased mission reliability analysis for autonomous vehicles.

An efficient real-time method of analysis for non-coherent fault trees (2009)
Journal Article

Fault tree analysis is commonly used to assess the reliability of potentially hazardous industrial systems. The type of logic is usually restricted to AND and OR gates which makes the fault tree structure coherent. In non-coherent structures not only... Read More about An efficient real-time method of analysis for non-coherent fault trees.

A reliability analysis method using binary decision diagrams in phased mission planning (2009)
Journal Article

The use of autonomous systems is becoming increasingly common in many fields. A significant example of this is the ambition to deploy UAVs (unmanned aerial vehicles) for both civil and military applications. In order for autonomous systems such as th... Read More about A reliability analysis method using binary decision diagrams in phased mission planning.

Analysis of non-coherent fault trees using ternary decision diagrams (2008)
Journal Article

Risk and safety assessments performed on potentially hazardous industrial systems commonly utilise Fault Tree Analysis (FTA) to forecast the probability of system failure. The type of logic for the top event is usually limited to AND and OR gates whi... Read More about Analysis of non-coherent fault trees using ternary decision diagrams.

An enhanced component connection method for conversion of fault trees to binary decision diagrams (2008)
Journal Article

Fault Tree Analysis (FTA) is widely applied to assess the failure probability of industrial systems. Many computer packages are available which are based on conventional Kinetic Tree Theory methods. When dealing with large (possibly non-coherent) fau... Read More about An enhanced component connection method for conversion of fault trees to binary decision diagrams.

Prime implicants for modularised non-coherent fault trees using binary decision diagrams (2007)
Journal Article

This paper presents an extended strategy for the analysis of complex fault trees. The method utilises simplification rules, which are applied to the fault tree to reduce it to a series of smaller subtrees, whose solution is equivalent to the original... Read More about Prime implicants for modularised non-coherent fault trees using binary decision diagrams.

Qualitative analysis of complex modularized fault trees using binary decision diagrams (2006)
Journal Article

Fault tree analysis is commonly used in the reliability assessment of industrial systems. When complex systems are studied conventional methods can become computationally intensive and require the use of approximations. This leads to inaccuracies in... Read More about Qualitative analysis of complex modularized fault trees using binary decision diagrams.