ABSTRACT The majority of the studies on Quayside Cranes (QSCs) focus on optimising the automatic ... more ABSTRACT The majority of the studies on Quayside Cranes (QSCs) focus on optimising the automatic capabilities of the cranes and very few have studied their economic implications. This paper examines the economic feasibility of reducing QSCs' cycle-times resulting from automated features installed on existing post-Panamax cranes. It demonstrates that a considerable increase in productivity of QSCs is related directly or indirectly to an expected reduction of crane cycle-times. The study sets up the need for the proposed improvements through automation and explains the concepts of the systems involved. The concept offered by the proposed improvements distinguishes between the traditional system of loading and discharging of the containers and the automated methods. The evaluations and analyses in this study demonstrate that optimisation of the quayside operation enables the terminal operators to reduce turnaround time and port stays of containerships. The study illustrates that the expected economic benefits achieved from the improvement of the QSCs' performance, with regard to adoption of automated devices in this experiment, far exceeds the cost of adopting the various automatic devices.
... the NW to consist of Greater Manchester, Merseyside, Cheshire, Lancashire, and Cumbria and fo... more ... the NW to consist of Greater Manchester, Merseyside, Cheshire, Lancashire, and Cumbria and four unitary authorities: Blackburn with Darwin, Blackpool, Halton ... port of Preston, closed to commercial mer-chant shipping since the 1970s but open as a ma-rina, providing more ...
International Journal of Automation and Computing, 2005
After the 9/11 terrorism attacks, the lock-out of the American West Ports in 2002 and the breakou... more After the 9/11 terrorism attacks, the lock-out of the American West Ports in 2002 and the breakout of SARS disease in 2003 have further focused mind of both the public and industrialists to take effective and timely measures for assessing and controlling the risks related to container supply chains (CSCs). However, due to the complexity of the risks in the
ABSTRACT A Fuzzy Genetic Algorithm (FGA) is used to treat uncertainties associated with unit cost... more ABSTRACT A Fuzzy Genetic Algorithm (FGA) is used to treat uncertainties associated with unit costs of maintenance of Liquefied Natural Gas (LNG) carrier systems such as a containment system and a transfer arm. A Fuzzy Rule Base (FRB) is established to identify the unit costs of maintenance of the LNG containment system and transfer arm. It includes 125 LNG carrier maintenance cost rules, with technical consultancy cost, maintenance duration, and spare part cost as the antecedents and maintenance cost as the consequent. The outcome from the FRB is used to optimise a risk model using a Genetic Algorithm (GA) approach to find the optimal maintenance cost of each system with provided information on their respective time of interest, failure probability, failure frequency and maintenance-cost of the whole LNG carrier system.
ABSTRACT Over the last few years there has been a growing international recognition that Containe... more ABSTRACT Over the last few years there has been a growing international recognition that Container Supply Chains (CSCs) contribute to economic prosperity. But they are uniquely vulnerable to many risks caused by both the traditional hazards, such as physical breaches in the integrity of shipments and the newly rising threats associated with pirate and terrorist attacks. To allow better understanding and control of the risks, it is necessary for the stakeholders to proactively assess the chains' security and safety in advance, or reactively discover risks after a detrimental event occurs. This paper explores the various CSC risks, identifies common themes, and deals with the corresponding uncertainties by developing two novel risk modelling methods. One is to develop a fuzzy evidential reasoning approach for carrying out the security estimation of a vulnerable port system against terrorism attacks and the other is to produce a Bayesian network decision support tool for identifying vulnerable assets in a port security protection scenario. Consequently, the methods can be used to assemble and process subjective risk information on different aspects of a container transport system from multiple experts in a systematic way. Outcomes of the models can also provide decision makers with a transparent tool to evaluate CSC safety and security policy options for a specific scenario in a cost-effective manner.
2009 8th International Conference on Reliability, Maintainability and Safety, 2009
ABSTRACT This paper presents a novel failure analysis and prioritization method, which takes the ... more ABSTRACT This paper presents a novel failure analysis and prioritization method, which takes the advantages of both fuzzy and Bayesian reasoning to deal with some of the drawbacks concerning the use of the conventional failure mode and effects analysis (FMEA) technique. The method is proposed to extend the previously developed fuzzy rule-based bayesian reasoning (FuRBaR) approach to a wider context, where not only ambiguous estimates but also dependent relations associated with failures can be appropriately modelled.
Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering, 2011
Page 1. 1 Application of genetic algorithm to risk-based maintenance operations of liquefied natu... more Page 1. 1 Application of genetic algorithm to risk-based maintenance operations of liquefied natural ... A total risk formula is developed, which is dependent on hazard severity weight, failure frequencies, and the time and cost of maintenance and repair of the LNG carrier systems. ...
Transportation Research Part D-Transport and Environment, 2012
ABSTRACT This paper develops a subjective generic methodology for providing ship owners with a tr... more ABSTRACT This paper develops a subjective generic methodology for providing ship owners with a transparent evaluation tool for selecting their preferred NOx and SOx control techniques. We quantitatively analyse the merits of the control methods available in marine air pollution control practice using data collected from shipping companies, shipyards and maritime academies. We also prioritize the applicable control techniques with respect to operational shipping environments.
ABSTRACT The majority of the studies on Quayside Cranes (QSCs) focus on optimising the automatic ... more ABSTRACT The majority of the studies on Quayside Cranes (QSCs) focus on optimising the automatic capabilities of the cranes and very few have studied their economic implications. This paper examines the economic feasibility of reducing QSCs' cycle-times resulting from automated features installed on existing post-Panamax cranes. It demonstrates that a considerable increase in productivity of QSCs is related directly or indirectly to an expected reduction of crane cycle-times. The study sets up the need for the proposed improvements through automation and explains the concepts of the systems involved. The concept offered by the proposed improvements distinguishes between the traditional system of loading and discharging of the containers and the automated methods. The evaluations and analyses in this study demonstrate that optimisation of the quayside operation enables the terminal operators to reduce turnaround time and port stays of containerships. The study illustrates that the expected economic benefits achieved from the improvement of the QSCs' performance, with regard to adoption of automated devices in this experiment, far exceeds the cost of adopting the various automatic devices.
... the NW to consist of Greater Manchester, Merseyside, Cheshire, Lancashire, and Cumbria and fo... more ... the NW to consist of Greater Manchester, Merseyside, Cheshire, Lancashire, and Cumbria and four unitary authorities: Blackburn with Darwin, Blackpool, Halton ... port of Preston, closed to commercial mer-chant shipping since the 1970s but open as a ma-rina, providing more ...
International Journal of Automation and Computing, 2005
After the 9/11 terrorism attacks, the lock-out of the American West Ports in 2002 and the breakou... more After the 9/11 terrorism attacks, the lock-out of the American West Ports in 2002 and the breakout of SARS disease in 2003 have further focused mind of both the public and industrialists to take effective and timely measures for assessing and controlling the risks related to container supply chains (CSCs). However, due to the complexity of the risks in the
ABSTRACT A Fuzzy Genetic Algorithm (FGA) is used to treat uncertainties associated with unit cost... more ABSTRACT A Fuzzy Genetic Algorithm (FGA) is used to treat uncertainties associated with unit costs of maintenance of Liquefied Natural Gas (LNG) carrier systems such as a containment system and a transfer arm. A Fuzzy Rule Base (FRB) is established to identify the unit costs of maintenance of the LNG containment system and transfer arm. It includes 125 LNG carrier maintenance cost rules, with technical consultancy cost, maintenance duration, and spare part cost as the antecedents and maintenance cost as the consequent. The outcome from the FRB is used to optimise a risk model using a Genetic Algorithm (GA) approach to find the optimal maintenance cost of each system with provided information on their respective time of interest, failure probability, failure frequency and maintenance-cost of the whole LNG carrier system.
ABSTRACT Over the last few years there has been a growing international recognition that Containe... more ABSTRACT Over the last few years there has been a growing international recognition that Container Supply Chains (CSCs) contribute to economic prosperity. But they are uniquely vulnerable to many risks caused by both the traditional hazards, such as physical breaches in the integrity of shipments and the newly rising threats associated with pirate and terrorist attacks. To allow better understanding and control of the risks, it is necessary for the stakeholders to proactively assess the chains' security and safety in advance, or reactively discover risks after a detrimental event occurs. This paper explores the various CSC risks, identifies common themes, and deals with the corresponding uncertainties by developing two novel risk modelling methods. One is to develop a fuzzy evidential reasoning approach for carrying out the security estimation of a vulnerable port system against terrorism attacks and the other is to produce a Bayesian network decision support tool for identifying vulnerable assets in a port security protection scenario. Consequently, the methods can be used to assemble and process subjective risk information on different aspects of a container transport system from multiple experts in a systematic way. Outcomes of the models can also provide decision makers with a transparent tool to evaluate CSC safety and security policy options for a specific scenario in a cost-effective manner.
2009 8th International Conference on Reliability, Maintainability and Safety, 2009
ABSTRACT This paper presents a novel failure analysis and prioritization method, which takes the ... more ABSTRACT This paper presents a novel failure analysis and prioritization method, which takes the advantages of both fuzzy and Bayesian reasoning to deal with some of the drawbacks concerning the use of the conventional failure mode and effects analysis (FMEA) technique. The method is proposed to extend the previously developed fuzzy rule-based bayesian reasoning (FuRBaR) approach to a wider context, where not only ambiguous estimates but also dependent relations associated with failures can be appropriately modelled.
Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering, 2011
Page 1. 1 Application of genetic algorithm to risk-based maintenance operations of liquefied natu... more Page 1. 1 Application of genetic algorithm to risk-based maintenance operations of liquefied natural ... A total risk formula is developed, which is dependent on hazard severity weight, failure frequencies, and the time and cost of maintenance and repair of the LNG carrier systems. ...
Transportation Research Part D-Transport and Environment, 2012
ABSTRACT This paper develops a subjective generic methodology for providing ship owners with a tr... more ABSTRACT This paper develops a subjective generic methodology for providing ship owners with a transparent evaluation tool for selecting their preferred NOx and SOx control techniques. We quantitatively analyse the merits of the control methods available in marine air pollution control practice using data collected from shipping companies, shipyards and maritime academies. We also prioritize the applicable control techniques with respect to operational shipping environments.
Uploads