... techniques is utilized to estimate ship navigation states. This approach enables the estimation processes to skillfully reduce both system and measurement noises estimations. Consequently, it results in the generation of smoother and more responsive estimates of the respective vessel states, particularly...

... to learn the underlying model that is robust to extraneous noise. The KVLCC2 tanker is taken as the research object, and construct training data with free-running model test, designs the neural network structure based on LSTM cell to establish the mathematical model of ship maneuvering motion, and carries...

... on the recorded seismic spectra, showing the feasibility of this novel monitoring method. INTRODUCTION Emissions from shipping such as air pollution caused by CO 2 but also underwater radiated noise (URN) have a major environmental impact disturbing marine life and especially cetaceans. The International...

... of underwater radiated noise (URN) from a ship in 2023. The updated guidelines accepted a new idea, a URN management plan. If URN is monitored using fixed-point underwater sound measurement, the measured underwater sound should be classified. Hence, in this study, we investigated a method to automatically...

... of Hydrodynamic Noise by Flows around Three-Dimensional Circular Cylinder Jiajia Qin1, Haihua Deng2, Yuan Zhuang1, Decheng Wan1* 1 Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China 2 Wuhan Second Ship Design...

... The sonar sensor is affected by the medium environment, and its imaging is interfered with strong noise, which makes the detection and recognition ability of the target poor. Aiming at the complex underwater environment, this paper proposes an underwater target detection and recognition system. A new...

... on Underwater Radiated Noise of Rim-Driven Thruster Zhongwan Wu a, b, c, Jie Gong a, b, c, *, Jiangming Ding a, c, Junjun Su b, c a) Sanya Science and Education Innovation Park of Wuhan University of Technology, Sanya, China b) Key Laboratory of High Performance Ship Technology (Wuhan University of Technology...

... ABSTRACT Radiated noise undermines the stealth and safety of underwater vehicles. This study calculates the vibration and radiated noise of the power cabin for an underwater vehicle, followed by a correlation analysis. The results demonstrate a strong correlation coefficient of approximately...

... ABSTRACT Ultrahigh molecular weight polyethylene (UHMWPE) has been widely studied and applied in water-lubricated bearings for shipping due to its excellent comprehensive performance. This study aimed to investigate the frictional noise properties of underwater contact by preparing UHMWPE...

... ABSTRACT Underwater radiated noise (URN) is related to the concealment of ships and underwater vehicles, and also affects the marine biological environment. The nonlinear components in URN determine the far-field acoustic signal. Therefore, it is necessary to study the nonlinear noise in depth...

...Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-80-7; ISSN 1098-6189 www.isope.org Unsteady Cavitation and Noise...

... of offshore structures associated with marine development will probably generate undesirable underwater noise that is harmful to marine life living near construction sites. In order to reduce underwater noise and improve the marine acoustic environment, this study clarifies the generation mechanism...

... ABSTRACT Underwater noise radiated (URN) from ships represents a growing concern for the international community. The Acoustic Black Hole (ABH) combined with viscoelastic materials (VEMs), is a promising new solution for mitigating URN. In this paper, we present the characterization...

... environment than the airborne noise. The EMI conduction coupling has more serious influence on the sound response than the EMI radiation coupling, and the noise linearly increases with the decrease of distance to the EMI source. The shielding capacity and routing design of the cables are significant...

... propeller hull noise cavitation channel sheet cavitation vortex cavitation synchronization test test section noise signal tip vortex cavitation cavitation pressure fluctuation propeller cavitation high-speed video hydrophone cavitation behavior ABSTRACT In order to obtain...

... ABSTRACT Underwater noise (URN) is the focus of academic research, and cavitation is an important source of underwater noise. This paper takes NACA66 (mod) two-dimensional hydrofoil as the research object, and uses the open source software OpenFOAM to simulate the sheet cavitation and sound...

... data quality noise original signal wavelet threshold denoising spectrum wtd-vmd envelope spectrum frequency data mining optimal imf gaussian white noise real signal frequency spectrum artificial intelligence interference denoised signal variational mode decomposition...

...-NACA0012 profile are selected as the research objects. The large eddy simulation method is used to calculate the flow-induced noise by combining the Ffowcs Williams and Hawkings analogy and porous surface integral. The results of three kinds of methods are compared with experiment to verify the reliability...

... marine transportation particle filter perera noise machine learning particle estimation result application vessel state trajectory prediction disturbance estimation motion model bootstrap filter maneuver artificial intelligence navigation curvilinear kinematic model algorithm...

... ABSTRACT Due to casualties and property losses in ship capsizing accidents, the study of ship capsizing is of great significance. In this study, two kinds of filter models are used to filter the white noise load to obtain colored noises with the statistical characteristics of the actual wave...