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Keywords: decomposition
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Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-539
... ABSTRACT This study presents a novel hybrid method combining Empirical Mode Decomposition (EMD) and Dynamic Mode Decomposition (DMD) for predicting ships’ motion, specifically the yaw angular velocity during a 35 ° turning motion of a KCS vessel used as testing data. The EMD method...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-072
... development operations (Wang R, 2009; Bu Y, 2020). The destabilization and decomposition of hydrates can present significant safety risks to drilling and production activities. Currently, cementing hydrate layers is considered a safer and more effective method for sealing them compared to depressurization...
Proceedings Papers
Zhiliang Wen, Jin Yang, Ting Sun, Laiao Ren, Zengcheng Han, Wencheng Wang, Huizhen Ma, Song Liu, Haitao Nie
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-065
... ABSTRACT This paper investigates the sand production issue in the process of natural gas hydrate depressurization production and employs the T-H-M-C coupled model to describe the complex behavior of hydrate decomposition and fluid-solid coupling. A homogeneous geological model was constructed...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-369
... artificial intelligence machine learning sery neural network subsea system algorithm information deep learning floating production systems decomposition eemd algorithm lstm neural network platform semi-submersible platform rmse extreme short-term prediction characteristic...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-049
... deepcwind semi-submersible platform decomposition subdomain interface multi-layer mesh technique solver ABSTRACT The dynamics of floating offshore wind turbines (FOWTs) poses a great challenge for their coupled analysis. While the model-based method is efficient, the computational fluid...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-002
... ABSTRACT The exothermic hydration of oil well cement leads to hydrate decomposition, making deepwater cementing difficult. Therefore, we designed a new heat storage agent (HSA), which can absorb the heat released during cement hydration. HSA uses multi-component alkanes as the heat storage...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-194
... average temperature shale strength heat flow depositional environment mudstone hydrate temperature variation decomposition equation elsevier hillel modeling annual temperature variation soil temperature soil layer interaction celsuis ABSTRACT Changes in the physical state...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-528
... into low-order systems, and realize real-time calculation and analysis of the system while ensuring accuracy, and provide efficient real-time virtual mapping results for digital twin technology. Based on the proper orthogonal decomposition (POD), this paper takes the flow velocity as input variables...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-545
..., this paper extracted normal statistical information of the full-scale ship speed time series. First, the interpolation method was used to make the speed data have a unified time interval. In order to obtain stable data periods, wavelet decomposition was used to achieve noise reduction of data, which were...
Proceedings Papers
Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1163
... upstream oil & gas significant effect coefficient reservoir thickness soil layer reservoir characterization seismic response natural gas hydrate gas hydrate reservoir bulk compression modulus water depth resonance frequency decomposition frequency vertical seismic response...
Proceedings Papers
Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1150
... are gradually applied to marine hydrologic factor prediction. Empirical modal decomposition is a method for handling nonstationary signals that can decompose the different scale fluctuations in the signal step by step. Optimization of residual water level sample data by using empirical modal decomposition...
Proceedings Papers
Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-660
... in gas hydrate exploitation and an aggravated environment around oil field. methane gas decomposition methane hydrate dissociation mpa depressurization hydrate dissociation dissociation rate flow assurance concentration reactor engineering mpa 2 mass concentration inorganic salt...
Proceedings Papers
Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-272
... is considered as a strategic energy. 1m 3 of natural gas hydrate can release 164m 3 of natural gas and 0.87m 3 of water during the decomposition of hydrate. Natural gas hydrate is an ice-like crystal formed by methane and water under high pressure and low temperature. Currently, there are four main methods...
Proceedings Papers
Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-188
..., the results will suffer a serious mode-mixing problem and contain a lot of noises which will lead to a bad result. In this paper, a new time-frequency analysis method based on the Hilbert transform is introduced, the Intrinsic mode functions (IMF) obtained by empirical mode decomposition (EMD) is redefined...
Proceedings Papers
Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-236
.... The SDSS samples containing secondary phases were heat treated at 300°C over a period of four weeks. The use of SDSS is limited to temperatures below 250°C, mainly due to spinodal decomposition of alloying elements in the austenite and ferrite. The presence of the unwanted alloying element rich chi...
Proceedings Papers
Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-673
... ABSTRACT This paper aims to introduce a new method for the analysis of non-linear and non-stationary signals. This method is based on empirical mode decomposition technology by decomposing signals into multiple eigenfunctions. But there is modal aliasing problem in this method. We combine...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-269
... decomposition characteristic Comparison of Time-frequency Analysis Methods for an Offshore Wind Turbine Fushun Liu a*, Gaojie Cuia, Shujian Gaoa, Bin Wang b, Jinning Shen b, Hu Zhou b aCollege of Engineering, Ocean University of China. Qingdao, China bPowerChina Huadong Engineering Corporation Limited...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-438
... to 20°C (271.15°K∼293.00°K) and pressures from 6MPa to 11MPa (930∼1560PSI). Gas hydrate phase formation and decomposition circles were made in samples with water previously exposed to pressure of 50MPa and 10MPa. Also, a distinction of experiments data between the Kinetics (K) and Hydrate Stability Zone...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-481
... reduced through the application of dynamic mode decomposition to reconstruct the final, steady state total drag value given only few initial snapshots of the simulation. The active subspaces analysis is here applied to the geometry of the DTMB-5415 naval combatant hull, which is a common benchmark in ship...
Proceedings Papers
Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-408
... Sea-level Records Analysis with Improved Empirical Mode Decomposition (EMD) and Artificial Neural Networks (ANN) Han Soo Lee1 and Sooyoul Kim2 1 Graduate School for International development and Cooperation, Hiroshima University Higashi-Hiroshima, Hiroshima, Japan 2 Graduate School of Engineering...
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