Recent additions

  • Proactive Learning for Intelligent Maintenance in Industry 4.0 

    Noureddine, Rami; Solvang, Wei Deng; Johannessen, Espen; Yu, Hao (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-03)
    Manufacturing companies require efficient maintenance practices in order to improve business performance, ensure equipment availability and reduce process downtime. With the advent of new technology, manufacturing processes are evolving from the traditional ways into digitalized manufacturing. This transformation enables systems and machines to be connected in complex networks as a collaborative ...
  • Solving the Location Problem of Printers in a University Campus Using p-Median Location Model and AnyLogic Simulation 

    Sun, Xu; Yu, Hao; Solvang, Wei Deng (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-03)
    The location decision on service facilities is of significant importance in determining the accessibility of the service provided. Due to this reason, it has been extensively focused over the past decades by both researchers and practitioners. This paper investigates a novel two-phase hybrid method combining both optimization model and agent-based simulation in order to solve the location problem ...
  • A Stochastic Closed-Loop Supply Chain Network Optimization Problem Considering Flexible Network Capacity 

    Yu, Hao; Solvang, Wei Deng; Sun, Xu (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-03)
    Nowadays, due to the concern of environmental challenges, global warming and climate change, companies across the globe have increasingly focused on the sustainable operations and management of their supply chains. Closed-loop supply chain (CLSC) is a new concept and practice, which combines both traditional forward supply chain and reverse logistics in order to simultaneously maximize the utilization ...
  • An Introduction of the Role of Virtual Technologies and Digital Twin in Industry 4.0 

    Azarian, Mohammad; Yu, Hao; Solvang, Wei Deng; Shu, Beibei (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-03)
    It is inevitable that technological improvements have affected human’s life in any aspect to a large extent. Automation, artificial intelligence, robotics, etc., are some advances contributed to the fourth industrial revolution: Industry 4.0. Despite there are still many arguments, Internet of Things (IoT) and Cyber Physical Systems (CPS) have been widely acknowledged as the main fundaments of ...
  • Study of ice accretion on wind turbine blade profiles using thermal infrared imaging 

    Yousuf, Adeel; Jin, Jia Yi; Sokolov, Pavlo; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-08)
    Atmospheric icing has been recognized as hindrance in proper utilization of good wind resources in cold regions. There is a growing need to better understand the ice accretion physics along wind turbine blades to improve its performance and for optimal design of anti/de-icing system. This article describes a study of ice accretion along wind turbine blade profiles using thermal infrared imaging. Surface ...
  • Study of Ice Accretion on Horizontal Axis Wind Turbine Blade using 2D and 3D Numerical Approach 

    Jin, Jia Yi; Virk, Muhammad Shakeel; Qin, hu; Jiang, Xingliang (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
    In order to optimize the wind turbine operation in ice prone cold regions, it is important to better understand the ice accretion process and how it affects the wind turbine performance. In this paper, Computational Fluid Dynamics (CFD) based 2D and 3D numerical techniques are used to simulate the airflow/droplet behaviour and resultant ice accretion on a 300 kW wind ...
  • Study of Wind Flow Angle and Velocity on Ice Accretion of Transmission Line Composite Insulators 

    Huang, Yafei; Virk, Muhammad Shakeel; Xingliang, Jiang (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-18)
    Ice accretion on insulators in cold regions is a serious and inevitable problem for power transmission lines, which may cause over-load and icing flashover accidents and can lead to wide power outage. In this research work, multiphase numerical simulations are carried out to investigate the effect of wind flow angle & velocity on the ice accretion of transmission line composite insulators. To verify ...
  • A Stochastic Network Design Problem for Hazardous Waste Management 

    Yu, Hao; Sun, Xu; Solvang, Wei Deng; Laporte, Gilbert; Lee, Carman K M (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-05)
    Hazardous waste management is of paramount importance due to the potential threats posed to the environment and local residents. The design of a hazardous waste management system involves several important decisions, i.e., the determination of the locations and sizes of treatment, recycling and disposal facilities, and organizing the transportation of hazardous waste among different facilities. In ...
  • A Co-Scheduling Problem of Ship Lift and Ship Lock at the Three Gorges Dam 

    Zhao, Xu; Lin, Qianjun; Yu, Hao (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-16)
    Due to the unprecedentedly increasing demands of waterway transportation on the Yangtze River during the latest years, traffic congestion at the Three Gorges Dam (TGD) has becoming a serious problem. In busiest seasons, a vessel may need to wait up to 3 days for passing the TGD via the ship lift or the five-stage ship lock. In order to improve the navigation efficiency and the utilization of passing ...
  • A Fuzzy-Stochastic Multi-Objective Model for Sustainable Planning of a Closed-Loop Supply Chain Considering Mixed Uncertainty and Network Flexibility 

    Yu, Hao; Solvang, Wei Deng (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-11)
    Closed-loop supply chain network design (CLSCND) has been increasingly spotlighted over the latest decade. The focus has been given to maximize the economic performance, resource utilization and sustainability through incorporating a holistic decision-making on both forward and reverse logistics. In this paper, a new fuzzy-stochastic multi-objective mathematical model is formulated for sustainable ...
  • A New Look at the Single Ladder Problem (SLP) via Integer Parametric Solutions to the Corresponding Quartic Equation 

    Høibakk, Ralph; Lukkassen, Dag; Meidell, Annette; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-18)
    The aim is to put new light on the single ladder problem (SLP). Some new methods for finding complete integer solutions to the corresponding quartic equation z 4 −2L z 3 +( L 2 − a 2 − b 2 ) z 2 +2L a 2 z− L 2 a 2 =0 z4−2Lz3+(L2−a2−b2)z2+2La2z−L2a2=0 are developed. For the case L≥ L min L≥Lmin , these methods imply a complete parametric representation for integer ...
  • Wind energy at remote islands in arctic region—A case study of Solovetsky islands 

    Ghani, Rizwan; Kangash, Aleksei; Virk, Muhammad Shakeel; Maryandshev, Pavel; Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-07)
    This paper describes a case study of wind resource assessment and wind park design at the Solovetsky Islands, which are located in the Arctic region of northern Russia. The Solovetsky historical and cultural complex has been included in the list of UNESCO's World Heritage Sites. 18 years of data of wind climatology from the NASA Langley Research Center are used for wind resource assessment at the ...
  • Reverse Logistics Network Design for Effective Management of Medical Waste in Epidemic Outbreaks: Insights from the Coronavirus Disease 2019 (COVID-19) Outbreak in Wuhan (China) 

    Yu, Hao; Sun, Xu; Solvang, Wei Deng; Zhao, Xu (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-09)
    The outbreak of an epidemic disease may pose significant treats to human beings and may further lead to a global crisis. In order to control the spread of an epidemic, the effective management of rapidly increased medical waste through establishing a temporary reverse logistics system is of vital importance. However, no research has been conducted with the focus on the design of an epidemic reverse ...
  • Experimental study of ice accretion on S826 & S832 wind turbine blade profiles 

    Jin, Jia Yi; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-16)
    To optimize the aerodynamic performance and reduce production losses of wind turbine operating in icing conditions, it is necessary to better understand the ice accretion physics along wind turbine blade. This paper describes a case study of ice accretion physics and its effects on aerodynamic performance of S826 and S832 airfoils for dry and wet ice conditions. Both these airfoils have different ...
  • An investigation into empirical ice density formulations for dry ice growth on cylinders 

    Sokolov, Pavlo; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-17)
    This paper describes an investigation into the empirical accreted icing density formulations, namely the numerical fits by (Makkonen and Stallabrass, 1984) and (Jones, 1990). Typically, the icing severity is estimated by the masses of the accreted ice, however, for this study the focus is primarily on the accreted ice densities and thicknesses for the main purpose of estimating the ice loads, in ...
  • Study of ice accretion and icing effects on aerodynamic characteristics of DU96 wind turbine blade profile 

    Jin, Jia Yi; Virk, Muhammad (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-26)
    In order to optimize the large wind turbines operation in ice prone cold regions, it is important to better understand the ice accretion physics and its effects on aerodynamic performance and power production losses. This paper describes a case study of ice accretion on DU96-W-180 airfoil, which has been used for large wind turbine blades such as NREL 5 MW. Analysis has been carried out for glaze ...
  • Architecture for Safe Human-Robot Collaboration: Multi-Modal Communication in Virtual Reality for Efficient Task Execution 

    Shu, Beibei; Sziebig, Gabor; Pieters, Roel (Peer reviewed; Chapter; Bokkapittel, 2019-08-01)
    Task-sharing and Human-Robot Collaboration has gained increased attention with the widespread commissioning and usage of collaborative robots. However, recent studies show that the fenceless collaborative robots are not as harmless as they look like. In order to study Human-Robot Interaction scenarios, in a safe manner, we propose to execute the scenario in Virtual Reality simulation and afterwards ...
  • Review of energy demands and wind resource assessment of the Solovetsky Archipelago 

    Ghani, Rizwan; Virk, Muhammad Shakeel; Kangash, Aleksei; Maryandshev, Pavel; lubov, viktar; Mustafa, Mohamad (Journal article; Tidsskriftartikkel, 2019-07)
    This paper aims to analyse the current situation of the energy system of the remote island territory of Solovetsky Archipelago. The Solovetsky historical and cultural complex was included in the list of UNESCO World Heritage Sites. Diesel fuel, which is used on the archipelago is expensive and pollutes the environment. By using Computational Fluid Dynamics (CFD) based numerical method, this study ...
  • Non-parametric Linear Technique for Measuring the Efficiency of Winter Road Maintenance in the Arctic Area 

    Hatamzad, Mahshid; Polanco Pinerez, Geanette (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-05)
    Improving the performance of Winter Road Maintenance (WRM) can increase the traffic safety and reduce the cost as well as environmental impacts. This study evaluates the efficiency of WRM technique, named salting, in the Arctic area by using Data Envelopment Analysis (DEA), which is a non-parametric linear method to measure the efficiencies of decision-making units (DMUs) based on handling multiple ...
  • Droplet distribution spectrum effects on dry ice growth on cylinders 

    Sokolov, Pavlo; Virk, Muhammad (Journal article; Peer reviewed, 2019-01-06)
    A detailed parametric analytical study along with a series of viscid multiphase numerical simulations of ice accretion were performed in comparison with experimental data of ice accretion on a 30 mm diameter cylinder. The study was performed for droplet distribution spectra, Langmuir (A-J), in addition to an experimental droplet distribution obtained in an icing tunnel.<br>Analysis shows that droplet ...

View more