Now showing items 41-52 of 52

    • Reliability assessment for final elements of SISs with time dependent failures 

      Wu, Shengnan; Zhang, Laibin; Lundteigen, Mary Ann; Liu, Yiliu; Zheng, Wenpei (Journal article, 2018)
      Reliability assessment for safety-instrumented systems (SISs) plays a vital role in improving the design of SISs. Traditional methods for SIS reliability assessment that assume constant failure rates are, however, not ...
    • Reliability assessment for subsea HIPPS valves with partial stroke testing 

      Wu, Shengnan; Zhang, Laibin; Liu, S; Liu, Yiliu; Barros, Anne Cecile Pénélope; Lundteigen, Mary Ann (Chapter, 2017)
      High integrity pressure protection systems (HIPPS) have been applied in subsea applications to prevent accidents due to over-pressurization. A subsea HIPPS can be regarded as a complete functional loop consisting of sensors, ...
    • Reliability evaluation of Chinese Train Control System Level 3 by using a fuzzy approach 

      Jiang, Lei; Wang, Xiaomin; Liu, Yiliu (Journal article, 2018)
      The Chinese Train Control System Level 3 (CTCS-3) has been developed to ensure the safe and efficient operation of high-speed railway networks in China. Failure of the CTCS-3 may result in serious accidents, causing damage ...
    • Reliability modeling of subsea SISs partial testing subject to delayed restoration 

      Wu, Shengnan; Zhang, Laibin; Zheng, Wenpei; Liu, Yiliu; Lundteigen, Mary Ann (Journal article; Peer reviewed, 2019)
      Subsea oil and gas production has always involved the challenging task of determining the overall reliability of safeguarding systems, such as safety instrumented systems (SISs). Partial testing and delayed restoration of ...
    • Reliability Modelling of ERTMS/ETCS 

      Kalvakunta, Raja Gopal (Master thesis, 2017)
      System reliability analysis has a significant influence on making decision and defining requirements for future operations. Performing a reliability assessment for a complex system is challenging due to varied performance ...
    • Safety barriers against common cause failure and cascading failure: literature reviews and modeling strategies 

      Xie, Lin; Lundteigen, Mary Ann; Liu, Yiliu (Chapter, 2018)
      Safety barriers are required in many technical systems to reduce initiating negations, suppress failure propagations, or mitigate the consequences of common cause failures and cascading failures. Based on a thorough ...
    • Spurious activation analysis of safety-instrumented systems 

      Jigar, Abraham Almaw; Liu, Yiliu; Lundteigen, Mary Ann (Journal article; Preprint, 2016)
      Safety-instrumented systems are used in industries to prevent the development of a process upset into an accident. For most processes, the desired response in the case of a process upset is to shutdown the process, and ...
    • Subsea High Integrity Pressure Protection System Design per IEC 61508 

      Obike, Emeka (Master thesis, 2015)
      High-integrity pressure protection system (HIPPS) is one of various implementation of safety instrumented system (SIS) utilized in oil and gas production and it is installed to perform its safety instrumented function (SIF) ...
    • The inspection strategy of the subsea gas boosting system considering imperfect test effect 

      Yao, Jinyong; Pang, Zhiping; Liu, Yiliu (Chapter, 2017)
      To make better use of resources and achieve the highest benefits, the reliability and inspection strategy of the subsea gas boosting system are proposed in this paper. First, the operation modes and phases of the system ...
    • Throughput-based importance measures of multistate production systems 

      Ahmed, Awil Abdrahman Ahmed; Liu, Yiliu (Journal article, 2018)
      Many production systems are multistate, with a finite number of performance levels that are between perfect functioning and complete failure. Importance measures are often used in the maintenance planning of complicated ...
    • Two-terminal reliability analysis for multi-phase communication networks 

      Lu, Ji-min; Innal, Fares; Wu, Xiaoyue; Liu, Yiliu; Lundteigen, Mary Ann (Journal article; Preprint, 2016)
      Abstract: Most researches of network reliability generally assume that the system structures do not change with time. This paper presents the concept of multi-phase network systems (MPNS) to consider dynamic characteristics ...
    • Uncertainty Analyses of Time in Construction Projects 

      Gjerde, Helene Mjelde (Master thesis, 2017)
      The aim of this master thesis is to investigate how uncertainty analysis on time can contribute to a better foundation for decision-making in the project planning phase, and by this reduce the total time spent in this ...