56 results found
Goldbeck N, Angeloudis P, Ochieng W, Resilience assessment for interdependent urban infrastructure systems using dynamic network flow models, Reliability Engineering and System Safety, ISSN: 0951-8320
Critical infrastructure systems are becoming increasingly interdependent, which can exacerbate the impacts of disruptive events through cascading failures, hindered asset repairs and network congestion. Current resilience assessment methods fall short of fully capturing such interdependency effects as they tend to model asset reliability and network flows separately and often rely on static flow assignment methods. In this paper, we develop an integrated, dynamic modelling and simulation framework that combines network and asset representations of infrastructure systems and models the optimal response to disruptions using a rolling planning horizon. The framework considers dependencies pertaining to failure propagation, system-of-systems architecture and resources required for operating and repairing assets. Stochastic asset failure is captured by a scenario tree generation algorithm whereas the redistribution of network flows and the optimal deployment of repair resources are modelled using a minimum cost flow approach. A case study on London’s metro and electric power networks shows how the proposed methodology can be used to assess the resilience of city-scale infrastructure systems to a local flooding incident and estimate the value of the resilience loss triangle for different levels of hazard exposure and repair capabilities.
Achurra-Gonzalez PE, Novati M, Foulser-Piggott R, et al., 2019, Modelling the impact of liner shipping network perturbations on container cargo routing: Southeast Asia to Europe application, ACCIDENT ANALYSIS AND PREVENTION, Vol: 123, Pages: 399-410, ISSN: 0001-4575
Hsu P-Y, Angeloudis P, Aurisicchio M, 2018, Optimal logistics planning for modular construction using two-stage stochastic programming, AUTOMATION IN CONSTRUCTION, Vol: 94, Pages: 47-61, ISSN: 0926-5805
Haughton TW, Angeloudis P, Parpas P, et al., Optimal Component Modularisation of Process Plants for Modular Construction, EURO 2018
Ainalis D, Achurra-Gonzalez P, Gaudin A, et al., Ultra-Capacitor based kinetic energy recovery system for heavy goods vheicles, 15th International Symposium on Heavy Vehicle Transport Technology
The Climate Change Act 2008 commits the UK to reduce the Greenhouse Gas emissions by 80% by 2050 relative to 1990 levels. While Heavy Goods Vehicles and buses contribute about 4% of the total Greenhouse Gas emissions in the UK, these emissions only decrease by 10% between 1990 and 2015. Urban areas are particularly susceptible to emissions and can have a significant impact upon the health of residents. For Heavy Goods Vehicles, braking losses are one of the most significant losses. A Kinetic Energy Recovery System can help reduce these emissions, and increase fuel efficiency by up to 30 %. This paper describes an InnovateUK funded project aimed at evaluating the technical and economic feasibility of a retrofitted Kinetic Energy Recovery System on Heavy Goods Vehicles through an operational trial, controlled emissions and fuel tests, and numerical modelling. A series of preliminary results using a numerical vehicle model is compared with operational data, along with simulations comparing the fuel efficiency of a Heavy Goods Vehicle with and without the KERS.
Escribano Macias J, Angeloudis P, Ochieng W, AIAA Integrated Trajectory-Location-Routing for Rapid Humanitarian Deliveries using Unmanned Aerial Vehicles, 2018 Aviation Technology, Integration, and Operations Conference
Karamanis R, Angeloudis P, Sivakumar A, et al., 2018, Dynamic Pricing in One-Sided Autonomous Ride-Sourcing Markets, 21st IEEE International Conference on Intelligent Transportation Systems (ITSC), Publisher: IEEE, Pages: 3645-3650, ISSN: 2153-0009
Achurra Gonzalez PE, Angeloudis P, Zavitsas K, et al., 2017, Attacker-defender modelling of vulnerability in maritime logistics corridors, Advances in Shipping Data Analysis and Modeling: Tracking and Mapping Maritime Flows in the Age of Big Data, Editors: Ducruet, ISBN: 9781351985093
Hsu P-Y, Aurisicchio MARCO, Angeloudis P, 2017, Establishing outsourcing and supply chain plans for prefabricated construction projects under uncertain productivity, International Conference on Computational Logistics - 2017, Publisher: Springer, Pages: 529-543, ISSN: 1611-3349
Goldbeck N, Angeloudis P, Ochieng W, A Dynamic Network Flow Model for Interdependent Infrastructure and Supply Chain Networks with Uncertain Asset Operability, International Conference on Computational Logistics
Hsu P-Y, Aurisicchio M, Angeloudis P, 2017, Supply chain design for modular construction projects, 25th Annual Conference of the International Group for Lean Construction (IGLC), Publisher: IGLC, ISSN: 2309-0979
The construction sector is currently undergoing a shift from stick-built construction techniques to modular building systems. If construction supply chains are to support this transformation, they need to be modified and strengthened using an adapted logistics system. The aim of this study is to establish a mathematical model for the logistics of modular construction covering the three common tiers of operations: manufacturing, storage and construction. Previous studies have indicated that construction site delays constitute the largest cause of schedule deviations. Using the model outlined in this paper we seek to determine how factory manufacturing and inventory management should be adapted to variations in demand on the construction site. We propose a Mixed Integer Linear Programming model that captures construction scenarios with demands for modular products that are either foreseeable or abruptly disrupted. The use of the model is illustrated through a case study of bathroom pods for a building project. The model outputs include supply chain configurations that reduce total costs across a range of scenarios. The model could serve as a decision support tool for modular construction logistics.
Nikhalat-Jahromi H, Angeloudis P, Bell MGH, et al., 2017, Global LNG trade: A comprehensive up to date analysis, MARITIME ECONOMICS & LOGISTICS, Vol: 19, Pages: 160-181, ISSN: 1479-2931
Karamanis R, Niknejad A, Angeloudis P, A Fleet Sizing Algorithm for Autonomous Car Sharing, Transportation Research Board 96th Annual Meeting
Shang W, Han K, Ochieng W, et al., 2017, Agent-based day-to-day traffic network model with information percolation, TRANSPORTMETRICA A-TRANSPORT SCIENCE, Vol: 13, Pages: 38-66, ISSN: 2324-9935
Goldbeck N, Angeloudis P, 2017, Civil Engineering: Unlocking the potential of future cities through sustainable and resilient infrastructure, Defining the Urban: Interdisciplinary and Professional Perspectives, Editors: Iossifova, Gasparatos, Doll, Publisher: Routledge, ISBN: 978-1472449498
Nikhalat-Jahromi H, Bell MGH, Fontes DBMM, et al., 2016, Spot sale of uncommitted LNG from Middle East: Japan or the UK?, ENERGY POLICY, Vol: 96, Pages: 717-725, ISSN: 0301-4215
Anvari B, Angeloudis P, Ochieng WY, A Multi-Objective GA-based Optimisation for Holistic Manufacturing,transportation and Assembly of Precast Construction, Automation in Construction, ISSN: 0926-5805
Resource scheduling of construction proposals allows project managers to assess resource requirements,provide costs and analyse potential delays. The Manufacturing, transportation and Assembly(MtA) sectors of precast construction projects are strongly linked, but considered separatelyduring the scheduling phase. However, it is important to evaluate the cost and time impacts ofconsequential decisions from manufacturing up to assembly. In this paper, a multi-objective GeneticAlgorithm-based (GA-based) searching technique is proposed to solve unified MtA resourcescheduling problems (which are equivalent to extended Flexible Job Shop Scheduling Problems).To the best of the authors’ knowledge, this is the first time that a GA-based optimisation approachis applied to a holistic MtA problem with the aim of minimising time and cost while maximisingsafety. The model is evaluated and compared to other exact and non-exact models using instancesfrom the literature and scenarios inspired from real precast constructions.
Angeloudis P, Greco L, Bell MGH, 2016, Strategic maritime container service design in oligopolistic markets, TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, Vol: 90, Pages: 22-37, ISSN: 0191-2615
Goldbeck N, Angeloudis P, Ochieng W, 2016, Analysing the resilience of metro systems under consideration of interdependencies: A combined Dynamic Bayesian Network and network flow approach, 14th World Conference on Transport Research (WCTR)
Briskorn D, Angeloudis P, 2016, Scheduling co-operating stacking cranes with predetermined container sequences, DISCRETE APPLIED MATHEMATICS, Vol: 201, Pages: 70-85, ISSN: 0166-218X
Goldbeck N, Angeloudis P, Ochieng W, 2016, Joint Vulnerability Analysis of Urban Rail Transit and Utility Networks, Transportation Research Board 95th Annual Meeting, Publisher: Transportation Research Board
As climate change is expected to increase the frequency of extreme weather events, cities around the world develop strategies to improve their disaster resilience. A key issue is the protection of critical urban infrastructure systems, such as transport networks. Rail transit networks are particularly exposed to flood risks and additional vulnerabilities arise from interdependencies with other infrastructure systems. This paper aims to improve modelling techniques that help to understand the conditions under which cascading failure can occur in interdependent urban infrastructure systems. Building on existing network flow models, a novel method for the coupling of networks is introduced, using binary connector variables and mixed integer linear programming. The coupling is modelled as additional commodity demand that is induced in one network depending on the commodity flows in another network. An example problem consisting of a rail transit network, a control system, an electric power network and a water supply network illustrates the practicability of the proposed modelling technique.
Anvari B, Bell MGH, Angeloudis P, et al., 2016, Calibration and Validation of a Shared Space Model Case Study, TRANSPORTATION RESEARCH RECORD, Pages: 43-52, ISSN: 0361-1981
Anvari B, angeloudis, ochieng, Multi-Objective GA-based Optimisation for Manufacturing, Transportation and Assembly of Precast Construction, 17th British-French-German Conference on Optimization
Novati M, Achurra Gonzales P, Angeloudis P, 2015, Modelling the effects of port disruptions: assessment of disaster impacts using a cost-based container flow assignment in liner shipping networks, TRB
Zis T, Angeloudis P, North R, et al., 2015, The environmental balance of vessel emission strategies, TRB
Angeloudis P, Greco L, Bell MGH, 2015, Strategic Maritime Container Transport Design in Oligopolistic Markets, 21st International Symposium on Transportation and Traffic Theory (ISTTT), Publisher: ELSEVIER SCIENCE BV, Pages: 269-282, ISSN: 2352-1465
Zis T, North RJ, Angeloudis P, et al., 2015, Environmental Balance of Shipping Emissions Reduction Strategies, TRANSPORTATION RESEARCH RECORD, Pages: 25-33, ISSN: 0361-1981
Goldbeck N, Angeloudis P, Ochieng W, 2015, Analysis of cascading failures across interdependent dynamic networks, 27th European Conference on Operational Research
Zis T, North RJ, Angeloudis P, et al., 2014, Evaluation of cold ironing and speed reduction policies to reduce ship emissions near and at ports, MARITIME ECONOMICS & LOGISTICS, Vol: 16, Pages: 371-398, ISSN: 1479-2931
Zis T, Angeloudis P, Ochieng W, et al., 2014, The effects of speed reduction policies near ports, TRB
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