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Keywords: extreme value
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Proceedings Papers
Uncertainties in Estimation of a Possible Upper Limit for Environmental Extremes
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Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-408
..., the associated confidence intervals become wider. In this note, we examine closer the relationship between the return level and the upper limit occurring for the case of a negative shape parameter in a fitted generalized extreme value distribution. Examples based on sea level data close to Swedish nuclear power...
Proceedings Papers
A Comparative Study on Field Motion Measurement and Numerical Simulation of Haiji-1 Mega Jacket Launch Process
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Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-118
... coordinate system operation china government barge comparative study jacket launch process coefficient canister upstream oil & gas numerical simulation pitch angle field motion measurement gnss simulation roll angle field measurement simulation result extreme value time point...
Proceedings Papers
Research on Residual Stresses Distribution of Stiffened Plate Structure After Induction Heating Based on SVM
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Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-385
..., the extreme value of residual stress is concentrated in the range of 245 MPa - 275 MPa, and the high stress area is concentrated within 30mm of the induction centerline. In addition, the maximum relative errors of the SVM algorithm based on radial basis function in predicting the width of stress concentration...
Proceedings Papers
Study on Cavitation Phenomenon of Marine High-Speed Propeller
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Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-493
... interface pressure reduction coefficient reduction coefficient reservoir simulation machine learning coefficient flux hydrofoil hydrodynamic performance free surface extreme value type section vaporization cavitation gas core solver mule solver anti-diffusive flux primary cavitation...
Proceedings Papers
Vertical Migration of ARGs at Water-Sediment Interface Under the Influence of Salinity and Ph
Available to PurchaseXin Li, Shuguang Liu, Sha Lou, Radnaeva Larisa Dorzhievna, Nikitina Elena, Makhinov Aleksei Nikolavich, Araruna José Tavares
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-201
... in content, with an overall trend of increasing then decreasing, then increasing then decreasing, with two extreme points. In group B, the lower layer showed a higher gene content than the upper layer, with an overall trend of increasing and then decreasing, with one extreme value. In group C the lower water...
Proceedings Papers
An Univariate Extreme Sea State and Extreme Wind Speed for An Offshore Wind Turbine off the South Coast of Jamaica
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Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1217
... ) and 10 m mean wind speed ( u 10 ). This paper explored the development of a univariate extreme value-analysis (EVA) sea state( H s and T p ) and extreme wind speed, within the Caribbean Sea. These results will be used as inputs to a numerical model of a floating offshore wind turbine (FOWT). The H...
Proceedings Papers
Hydroelasticity and Structural Safety of Oil and Gas Resources Development Support Platform
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Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3131
... resource development support platform motion response upstream oil & gas ship amplitude modal superposition method wave angle midsection structural safety freight & logistics services hydroelasticity oblique wave extreme value spectrum coordinate system forecast Hydroelasticity...
Proceedings Papers
Prediction of Springing-induced Extreme Responses of a TLP-Type Floating Wind Turbine
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Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1186
..., Structures, and Turbulence), a fully coupled simulation tool. The hydrodynamic loads considered include both first- and second-order wave-excitation loads. Different simulation sizes are compared. Different extreme-value prediction methods are applied and the results are compared. Both the peak-over...
Proceedings Papers
Extreme Motion Predictions of Semi-Submersible Platform Based on Deep Learning Method and Prototype Monitoring Data
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Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1282
.... The distribution disciplinarians of ocean environmental loads are analyzed by the fractal theory and statistical analysis methods. The extreme values of 6-DoF-motions are selected as the characteristic parameters of the output layer. A Long-Short-Term Memory Network (LSTM) deep learning network is established...
Proceedings Papers
Extreme Value Analysis of Linear Wave-Induced Load Based on Brent Method
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Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-512
... that encounter wave frequency is related to the heading angle of short-crest when calculating none-zero spectral momentum under the combined influence of long and short crest waves. As to the solution of long-term extreme value, to avoid the iterative failure, the Brent method is used to solve the nonlinear...
Proceedings Papers
Tail Behaviour of Pipeline Mechanical Strength Distributions
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Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-489
... distribution fit of the data. Even though this distribution is generally suitable for describing average behaviour, it fails to describe extreme behaviour. This paper adopts extreme value theory (EVT) to assess extreme behaviour of material strength. Evidence is found that the minimum possible material...
Proceedings Papers
Maximum Pit Depth Variability in Water Injection Pipelines
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Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-652
... ABSTRACT Data for maximum pit depths obtained from intelligent pigging runs for several older operational water injection pipelines (WIPs) has been used extensively for prediction of likely future pipe wall penetration. Often such data do not fit extreme value distributions very well. Also...
Proceedings Papers
Metocean Extreme Estimations: The Sensitivity of Offshore Design Measures to Statistics’ Uncertainties
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Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-576
... ABSTRACT Most Coastal and Offshore Engineering applications have to deal with the extreme waves, estimated by an extreme value model, a statistical approach that uses the available wave data to estimate physical extremes. The usual lack of reliable long-term wave datasets, implies the need...
Proceedings Papers
Storm Survival Inplace Analysis of Jack-Ups
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Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-465
... assessment variable load operation drilling equipment hull upstream oil & gas calculation result extreme value structural strength foundation china sea environmental load fixation device rig south china sea storm survival inplace analysis requirement specification Storm Survival...
Proceedings Papers
Numerical Simulation and Experimental Investigation on the Upper and Lower Assemblies of Free Standing Hybrid Riser System
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Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-211
... were separately carried out, and extreme values were respectively calculated in the frontal and lateral loading cases. The state of von Mises stress indicated that the UA and LA subjected to the lateral current were safer than these subjected to the frontal current. Above all, all the extreme stresses...
Proceedings Papers
Large Wave Flume Test on Semi-circular Jetty of Yangtze River Estuary Regulation Project
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Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-507
... (2011 and 2013). project site crest wave pressure extreme value regular wave time process uplift total force wave parameter wave force direction definition model scale calculation method statistical result water depth 2 model test water depth 1 Large Wave Flume Test on Semi...
Proceedings Papers
Generation of Multiple Equivalent Regular Waves for Preliminary Analyses of Floating Production Systems
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Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-073
... procedure, comparing its results with those provided by the full spectral irregular seastate approach. wave component equivalent regular wave approach wave approach subsea system jonswap spectrum spectrum equivalent regular wave extreme value amplitude multiple equivalent regular wave...
Proceedings Papers
Steady State Response of a Parked Spar-type Wind Turbine Considering Blade Pitch Mechanism Fault
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Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-157
... bending moment may also exceed the 50-year values by more than 10%. artificial intelligence fault type 0 renewable energy fault type 1 sea state extreme value blade 2 turbine spectrum surge fault type 3 wind turbine wave misalignment fault type1 offshore wind turbine wind energy...
Proceedings Papers
Extreme Value Analysis of Wave Energy Converters
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Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-554
... ABSTRACT: This paper presents a statistical Extreme Value Analysis (EVA) methodology to evaluate the design survivability condition of a Wave Energy Converter (WEC). The technique is applied to the Oyster® WEC design which is being developed by Aquamarine Power Ltd. (APL) but can be easily...
Proceedings Papers
Dynamic Response of Jack-Up Units — Reevaluation of SNAME 5-5A Four Methods
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Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-587
..., andε is the damping ratio. machine learning fitting method rig 1 random seed selection procedure drilling equipment dynamic analysis standard deviation probability extreme value daf base shear artificial intelligence natural period weibull method jack-up unit mpme upstream oil...
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