Results 51 to 60 of about 2,187,898 (350)
Toward Visual Autonomous Ship Board Landing of a VTOL UAV [PDF]
, 2013 In this paper we tackle the problem of landing a helicopter autonomously on a ship deck, using as the main sensor, an on-board colour camera. To create a test-bed, we first adequately simulate the movement of a ship landing platform on the Sea, for ...
Campoy Cervera, Pascual +4 more
core +2 more sources
Zhongguo Jianchuan Yanjiu, 2017 Aiming at the problem of frequent abnormal outboard noise in ships, an abnormal noise source location method is proposed, and a location model checked by the double cylindrical shell experiment is built.
LI Ruibiao +3 more
doaj +1 more source
Heliyon, 2023 Self-Biased Magnetic Pendulum Array (SBMPA) is an efficient and portable transmitter in ultralow frequency (ULF). The resonance frequency of SBMPA is affected by the magnetic field of the radially magnetized cylindrical permanent magnets.
Weiye Song, Changgeng Shuai, Qi Zhai
doaj +1 more source
A Novel Denoising Method for Ship-Radiated Noise
Journal of Marine Science and Engineering, 2023 Ship-radiated noise (SN) is one of the most critical signals in the complex marine environment; however, it is inevitably contaminated by the marine environment’s noise as well as noise from other equipment.
Yuxing Li, Chunli Zhang, Yuhan Zhou
semanticscholar +1 more source
Rudder roll stabilization for ships [PDF]
, 1990 This paper describes the design of an autopilot for rudder roll stabilization for ships. This autopilot uses the rudder not only for course keeping but also for reduction of the roll. The system has a series of properties which make the controller design
Amerongen, J. van +2 more
core +3 more sources
Statistics of Distant Shipping Noise [PDF]
The Journal of the Acoustical Society of America, 1972 In an earlier paper by Dyer, a rudimentary analytical model was proposed for distant shipping noise in the ocean. This model has been extended to reflect actual ocean conditions better. With this extension, the dependence of statistical parameters on the disposition of ships at sea and on the observational beamwidth and bandwidth may be more readily ...
I. Dyer, J. C. O'Connor
openaire +1 more source
AIP Advances, 2021 The purpose of this study is to reduce the errors caused by the inversion of the transfer function (TF) matrix when evaluating ship-radiated noise by operational transfer path analysis. The singular value decomposition (SVD), generalized cross validation
Ruibiao Li, Wenjun Bu
doaj +1 more source
Results in Engineering, 2023 The symmetrical oil suction and discharge chambers and the reversing rotation condition of bidirectional involute internal gear pumps result in low oil absorption capacity and flow pulsation due to cavitation.
Yantao Zhang, Zongbin Chen, Jian Liao
doaj +1 more source
Quantifying the contribution of ship noise to the underwater sound field.
Journal of the Acoustical Society of America, 2020 The ambient sound field in the ocean can be decomposed into a linear combination of two independent fields attributable to wind-generated wave action at the surface and noise radiated by ships. The vertical coherence (the cross-spectrum normalized by the
Najeem Shajahan +2 more
semanticscholar +1 more source
Zhongguo Jianchuan Yanjiu, 2017 [Objectives] In order to study the underwater jet noise characteristics,[Methods] the Lighthill acoustic analogy is carried out to compute the underwater free jet flow sound field characteristic of axisymmetric nozzle, with applying of FLUENT simulation ...
XING Junhua +3 more
doaj +1 more source