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• W4367318610 abstract "Autonomous underwater gliders (AUGs) are effective platforms for oceanic research and environmental monitoring. However, complex underwater environments with uncertainties could pose the risk of vehicle loss during their missions. It is therefore essential to conduct risk prediction to assist decision making for safer operations. The main limitation of current studies for AUGs is the lack of a tailored method for risk analysis considering both dynamic environments and potential functional failures of the vehicle. Hence, this study proposed a copula-based approach for evaluating the risk of AUG loss in dynamic underwater environments. The developed copula Bayesian network (CBN) integrated copula functions into a traditional Bayesian belief network (BBN), aiming to handle nonlinear dependencies among environmental variables and inherent technical failures. Specifically, potential risk factors with causal effects were captured using the BBN. A Gaussian copula was then employed to measure correlated dependencies among identified risk factors. Furthermore, the dependence analysis and CBN inference were performed to assess the risk level of vehicle loss given various environmental observations. The effectiveness of the proposed method was demonstrated in a case study, which considered deploying a Slocum G1 Glider in a real water region. Risk mitigation measures were provided based on key findings. This study potentially contributes a tailored tool of risk prediction for AUGs in dynamic environments, which can enhance the safety performance of AUGs and assist in risk mitigation for decision makers." @default.
• W4367318610 created "2023-04-29" @default.
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• W4367318610 date "2023-04-27" @default.
• W4367318610 modified "2023-10-17" @default.
• W4367318610 title "A copula‐based method of risk prediction for autonomous underwater gliders in dynamic environments" @default.
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• W4367318610 doi "https://doi.org/10.1111/risa.14149" @default.
• W4367318610 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37105939" @default.
• W4367318610 hasPublicationYear "2023" @default.
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