Results 71 to 80 of about 2,187,898 (350)

Friction-induced vibration characteristics of water-lubricated rubber bearing

Zhongguo Jianchuan Yanjiu, 2018
[Objectives] The stern tube rubber bearing is an important part of marine propulsion systems. However, under unfavorable low-speed, heavy duty and partial high-temperature working conditions, bad lubrication can occur and cause friction-induced vibration.
PENG Weicai, TAN Yuhang
doaj   +1 more source

Experimental investigation into vibration control of stern structure excited by propeller forces

Zhongguo Jianchuan Yanjiu, 2021
ObjectivesTo reduce the vibration of stern structure excited by lateral propeller forces, the application of vibration isolation, vibration blocking masses and damping coating is carried out.MethodsFirst, the vibration transmission characteristics of the
Shengpeng JIANG, Zixiang HUANG, Di WU, Zhizhong LIU, Zhiyi ZHANG   +4 more
doaj   +1 more source

Analysis of noise from anchored ship and extent of noise to ships vicinity

Journal of The Japan Institute of Marine Engineering, 2006
Noise from a ship at anchor sometimes poses problems to humans in the vicinity. The sound from the exhaust of the main generator is the main cause for the noise. This can be managed by installing an active silencer to the main generator. All the noise sources from the ship were analyzed after installing the silencer.
Sadakazu Nakajima, Hiromi Mochizuki, Yosuke Kitano, Kazuya Kumagae, Ken Katsumi, Yuji Mine   +5 more
openaire   +2 more sources

PEDOT:PSS—A Key Material for Bioelectronics

Advanced Science, EarlyView.
PEDOT:PSS ‐ Poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate ‐ is typically processed from water dispersions to form multifunctional and multidimensional constructs with tunable electronic and ionic conductivity. Throught processing engineering, PEDOT:PSS is intergrated in bioelectronic devices that operate efficiently in physiological conditions
Alan Eduardo Ávila Ramírez, David Pieter van der Laan, Mustafeez Bashir Shah, Liwen Wang, Erica Zeglio, Achilleas Savva   +5 more
wiley   +1 more source

Investigation on Low-Frequency and Broadband Sound Absorption of the Compact Anechoic Coating Considering Hydrostatic Pressure

Journal of Marine Science and Engineering
The anechoic coating capable of absorbing sound energy in low frequencies within broadband is essential to conceal underwater vehicles. However, the geometric deformation and modification of mechanical parameters under hydrostatic pressure affect the ...
Xinsheng Fang, Xiao Pan, Xiaowei Zhang, Dongsheng Li, Xuewen Yin, Yabin Jin, Weibo Wang, Wenwei Wu   +7 more
doaj   +1 more source

Design and Experiment of Magnetic Antenna Vibration and Noise Reduction System

Applied Sciences, 2022
The magnetic antenna can receive extremely weak underwater magnetic signals, and induce the magnetic field intensity which can reach the femto-tesla (fT) level, making it widely used in underwater electromagnetic signal detection.
Sijie Jiang, Changgeng Shuai, Wei Jiang, Linmin Huang, Huan Zheng, Chengren Yuan   +5 more
doaj   +1 more source

Arbitrary 3D Organic Mixed Ionic‐Electronic Conductor Architectures via Self‐Fusion of PEDOT:PSS Microfibers

Advanced Science, EarlyView.
A general fabricating strategy for arbitrary 3D organic mixed ionic‐electronic conductor architectures is reported using PEDOT:PSS microfiber building blocks. A water‐assisted self‐fusion process is successfully developed in which adhesion can be modulated as reversible (PSS‐rich) or irreversible (PEDOT‐rich) self‐fusion depending on the post‐treatment
Youngseok Kim, Jongwon Lee, Jiwoong Kim, Jung Il Yoo, Junggeon Park, Jaeyoung Lee, Heung Cho Ko, HyungJu Ahn, Myung‐Han Yoon   +8 more
wiley   +1 more source

Polynomial approach to nonlinear predictive generalized minimum variance control [PDF]

, 2010
A relatively simple approach to non-linear predictive generalised minimum variance (NPGMV) control is introduced for non-linear discrete-time multivariable systems.
Grimble, M.J., Majecki, P.M.
core   +1 more source

Shipping noise

Archives of Acoustics, 2004
The aim of this paper is to present the result of the experimental research associated with the transmission of acoustic energy generated by a moving ship and its impact on the marine animals. The methodology of evaluation of the transmission of vibration energy from the ship's mechanisms into the sea environment is given and some examples of ...
E. Kozaczka, G. Grelowska
openaire   +1 more source

A shipping noise prediction tool [PDF]

OCEANS 2015 - Genova, 2015
Underwater noise is a form of pollution causing significant concern in terms of environmental status. Shipping is considered the main contributor to the total noise at the global scale, since ship radiated noise can propagate up to tens or hundreds of kilometers.
Cristiano Soares, Friedrich Zabel, Sergio M. Jesus   +2 more
openaire   +1 more source