Blar i NTNU Open på forfatter "Liu, Yiliu"
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Group maintenance optimization of subsea Xmas trees with stochastic dependency
Fan, Dongming; Zhang, Aibo; Feng, Qiang; Cai, Baoping; Liu, Yiliu; Ren, Yi (Peer reviewed; Journal article, 2021)Subsea Xmas trees (XTs) are vital equipment for offshore oil and gas development. Due to a long and continuous operation, components of XTs often become vulnerable subjected to degradation and unexpected failures. Due to ... -
A hybrid heuristic optimization of maintenance routing and scheduling for offshore wind farms
Fan, Dongming; Ren, Yi; Feng, Qiang; Zhu, Bingyu; Liu, Yiliu; Wang, Zili (Peer reviewed; Journal article, 2019)As the operation and maintenance (O&M) costs constitute a substantial portion of the overall life-cycle cost of offshore wind farms, routing, and scheduling of maintenance are very important for cost reduction. With the ... -
A hybrid multi-stage methodology for remaining useful life prediction of control system: Subsea Christmas tree as a case study
Liu, Xuelin; Cai, Baoping; Yuan, Xiaobing; Shao, Xiaoyan; Liu, Yiliu; Khan, Javed Akbar; Fan, Hongyan; Liu, Yonghong; Liu, Zengkai; Liu, Guijie (Peer reviewed; Journal article, 2023)With the improvement of control system composition and operation process complexity, the uncertainty in its operation process increases and real-time observation data is difficult to obtain, and the influence of noise also ... -
Hybrid Prognostic Model for Residual Useful Life Estimation of Degraded Equipment
Zhang, Jie (Master thesis, 2015)As the consequence of the more widely used complex systems, there has been a shift in maintenance strategy. The traditional corrective maintenance is gradually replaced by preventive maintenance or even more advanced ... -
Importance Analysis of Nodes for the Resilience of an Oil & Gas Supply Chain Network
Khalaf, Lelan (Master thesis, 2022)Resiliens er et voksende begrep som har fått økt oppmerksomhet de siste årene, spesielt i sammenheng med forsynings- og verdikjeder. Det kan karakteriseres som en adaptiv kapasitet, hvor resiliensen til et system, også ... -
Information and Decision-making for Major Accident Prevention – A concept of information-based strategies for accident prevention
Zhu, Tiantian (Doctoral theses at NTNU;2022:379, Doctoral thesis, 2022)With wide application of sensors and digitalization for accident prevention and safety management of sociotechnical systems, distributed decision-makers rely on information supplied for their decision-making more than ever. ... -
Inspection and maintenance optimization for heterogeneity units in redundant structure with Non-dominated Sorting Genetic Algorithm III
Zhang, Aibo; Hao, Songhua; Xie, Min; Liu, Yiliu; Yu, Haoshui (Journal article; Peer reviewed, 2022) -
Investigation of Mitigating Measures in a Gas Process Facility
Hjørnevik, Karoline; Norbach, Alexandra (Master thesis, 2020)Abstract will be available on 2023-07-10 -
Joint optimization of performance-based contracting, condition-based maintenance and spare parts inventory for degrading production systems
Wang, Yukun; Liu, Yiliu; Gao, Weizheng; Li, Xiaopeng (Journal article; Peer reviewed, 2024)As a novel supporting approach, performance-based contracting (PBC) ties the service supplier’s compensation to the performance outcome of the system owned by the customer. It enables the service supplier to implement an ... -
Methodology for Identification of Dangerous Combinations of Output States of SIS
Dong, Yining (Master thesis, 2015)Many operations in process industry and other application sectors involve inherent risk due to different hazards. A safety-instrumented system (SIS) is installed to prevent development of a hazard to an accident or to ... -
Modeling for evaluation of safety instrumented systems with heterogeneous components
Cai, Baoping; Li, Wenchao; Liu, Yiliu; Shao, Xiaoyan; Zhang, Yanping; Zhao, Yi; Liu, Zengkai; Ji, Renjie; Liu, Yonghong (Peer reviewed; Journal article, 2021)A novel methodology for evaluation of safety instrumented systems (SISs) with heterogeneous components based on multi-stage dynamic Bayesian networks (MDBNs) is proposed. The unified evaluation model for M-out-of-N ... -
Modelling hazardous event scenarios for decision support
Lee, Shenae; Liu, Yiliu; Paltrinieri, Nicola (Chapter, 2017)Quantitative risk analysis has been a successful tool to support decision-making related to the design of technical (safety) barriers. A quantitative risk model may comprise a combination of event trees and fault trees, ... -
Multi-phase reliability growth test planning for repairable products sold with a two-dimensional warranty
Wang, Yukun; Liu, Yiliu; Li, Xiaopeng; Chen, Junyan (Journal article; Peer reviewed, 2019)For products sold with a two-dimensional warranty policy, the warranty servicing cost can be reduced through reliability growth during development. This paper investigates a multi-phase reliability growth test program for ... -
New Importance Measures for Multistate Systems
Ahmed, Ahmed Awil Abdrahman (Master thesis, 2017)In this study, two new importance measures for multistate systems are introduced and evaluated. These new importance measures improve the existing performance-based importance measures by considering the contributions of ... -
NewModel for Reliability and Availability Assessment of Subsea BOP System - Challenges and Approaches for New Requirements
Zhang, Juntao (Master thesis, 2015)The blowout preventer system is acting the secondary safety barrier in a hydrocarbon well, where the drilling mud column is defined as the primary safety barrier. However, in pratical industry, there is a new demand for ... -
Operation-oriented reliability and availability evaluation for onboard high-speed train control system with dynamic Bayesian network
Jiang, Lei; Liu, Yiliu; Wang, Xiaomin; Lundteigen, Mary Ann (Journal article; Peer reviewed, 2018)The reliability and availability of the onboard high-speed train control system are important to guarantee operational efficiency and railway safety. Failures occurring in the onboard system may result in serious accidents. ... -
Operational data-driven prediction for failure rates of equipment in safety instrumented systems: A case study from the oil and gas industry
Xie, Lin; Håbrekke, Solfrid; Liu, Yiliu; Lundteigen, Mary Ann (Journal article; Peer reviewed, 2019)Safety instrumented systems are frequently deployed to reduce the risk associated with industrial activities, such as those in the oil and gas industry. A key requirement for safety-instrumented systems in standards like ... -
Operational time-series data modeling via LSTM network integrating principal component analysis based on human experience
Yang, Ke; Liu, Yiliu; Yao, Yunan; Fan, Shidong; Mosleh, Ali (Peer reviewed; Journal article, 2020)Today’s information technologies involve increasingly intelligent systems, which come at the cost of increasingly complex equipment. Modern monitoring systems collect multi-measuring-point and long-term data which make ... -
Optimal follow-up policies for monitoring chronic diseases based on virtual age
Li, Mei; Liu, Yiliu; Liu, Zixian; Li, Xiaopeng; Lv, Ling (Peer reviewed; Journal article, 2021)Follow-up policies following treatment are indispensable and effective in reducing the number of complications of chronic diseases, and hence the cost of treating complications, but bring additional follow-up cost inevitably. ... -
Optimal reliability growth program for repairable and warranted products
Liu, Yiliu; Wang, Yukun (Chapter, 2019)Considering a two-dimensional and non-renewing free repair warranty (NFRW) policy, this paper proposes a modified reliability growth model to support the decision making of the manufacturer on the choice of a reliability ...