Blar i NTNU Open på forfatter "Stefanakos, Christos"
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Effect of modelling inhomogeneous wave conditions on structural responses of a very long floating bridge
Dai, Jian; Stefanakos, Christos; Leira, Bernt Johan; Alsos, Hagbart Skage (Peer reviewed; Journal article, 2021)Floating bridges are suitable for connecting land parcels separated by wide and deep waterbodies. However, when the span of the crossing becomes very long, the water environment exhibits inhomogeneities which introduce ... -
Investigation of inhomogeneous wave conditions in Sulafjorden
Stefanakos, Christos; Dai, Jian; Leira, Bernt Johan (Chapter, 2021)Complex fjord topography (bathymetry and coastline) may differentiate significantly wave conditions not only compared with the offshore ones but in the vicinity of few tens of meters. In the present work, possible ... -
LFCS Review report - Environmental conditions Wind, wave and current in coastal areas
Fergestad, Dag; Økland, Ole David; Stefanakos, Christos; Stansberg, Carl Trygve; Croonenborghs, Eloïse; Eliassen, Lene; Eidnes, Grim (Research report, 2018) -
Multi-step-ahead forecasting of wave conditions based on a physics-based machine learning (PBML) model for marine operations
Wu, Mengning; Stefanakos, Christos; Gao, Zhen (Peer reviewed; Journal article, 2020)Short-term wave forecasts are essential for the execution of marine operations. In this paper, an efficient and reliable physics-based machine learning (PBML) model is proposed to realize the multi-step-ahead forecasting ... -
Prediction of short-term wind and wave conditions for marine operations using a multi-step-ahead decomposition-ANFIS model and quantification of its uncertainty
Wu, Mengning; Stefanakos, Christos; Gao, Zhen; Haver, Sverre Kristian (Journal article; Peer reviewed, 2019)Short-term predictions of wind and wave properties with a duration of 1–3 days are vital for decision-making during the execution of marine operations. One-step-ahead weather conditions can be accurately predicted via ... -
Prediction of Short-term Wind and Wave Conditions Using Adaptive Network-based Fuzzy Inference System (ANFIS) for Marine Operations
Wu, Mengning; Stefanakos, Christos; Gao, Zhen (Chapter, 2018)The paper focuses on prediction of short-term environmental conditions by using an improved ANFIS method for marine operations. The hindcast data used here consists of ten-year long one-hourly time series of mean wind speed ... -
Uncertainty of Machine Learning-Based Methods for Wave Forecast and its Effect on Installation of Offshore Wind Turbines
Wu, Mengning (Doctoral theses at NTNU;2021:325, Doctoral thesis, 2021)Marine operations, such as offshore lifting and mating, are complex and highly weather-sensitive. When planning these weather-restricted opera-tions, it is necessary to determine the response-based operational limits in ...