Results 41 to 50 of about 3,364 (224)

Optimal control and guidance of homing and docking tasks using an autonomous underwater vehicle

, 2007
In this paper, the simulation results of a control and guidance strategy for homing and docking tasks using an autonomousunderwater vehicle are presented.
Jantapremjit, Pakpong, Wilson, P. A.
core   +1 more source

Development of a Towed Underwater Platform That Can Operate in a Marine Environment and Explore the Sea Bottom

Journal of Marine Science and Engineering, 2022
Owing to environmental constraints, it is challenging to stably conduct various missions or surveys of the seabed for a prolonged period in the marine environment. To address this challenge, several devices and technologies are being developed.
Sung-Jo Yun, Hyo-Gon Kim, Jung-Woo Park, Hyo-Jun Lee, Jong-Chan Kim, Jeong-Hwan Hwang, Young-Ho Choi, Sin-Je Lee, Jae-Kwan Ryu, Jin-Ho Suh, Joon-Goo Park   +10 more
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

On the reliability of the Autosub autonomous underwater vehicle [PDF]

, 2003
As autonomous underwater vehicles (AUVs) enter operational service an assessment of their reliability is timely. Using the Autosub AUV as an example, several design issues affecting reliability are discussed, followed by an analysis of recorded faults ...
Stevenson, P., Challenor, P.G., P. Stevenson, N. W. Millard, Griffiths, G., G. Griffiths, McPhail, S.D., Millard, N.W., S. D. Mcphail   +8 more
core  

Broadband multi-unit composite metamaterial for simultaneous sound wave and electromagnetic wave absorption

Materials & Design
We propose a broadband multi-unit composite metamaterial consisting of nine sub-units capable of simultaneously achieving broadband noise reduction and electromagnetic wave absorption. A theoretical model was established to calculate the sound absorption
Nansha Gao, Zhicheng Zhang, Xiao Liang, Yiting Li, Guang Pan   +4 more
doaj   +1 more source

Optimizing Strategies for Non‐Invasive Prospection of Settlements in the Intertidal Zone: A Case Study From the Centre of the Drowned Medieval Village of Tolsende (Scheldt Estuary, the Netherlands)

Archaeological Prospection, EarlyView.
ABSTRACT Medieval and early modern drowned villages in the intertidal zone of the Scheldt estuary (the Netherlands) constitute intriguing yet largely understudied components of north‐western Europe's underwater cultural heritage. Despite their high archaeological potential as time capsules of past settlement landscapes, research has remained limited ...
Jan Trachet, Sarah Bäumler, Stefan Krojer, Jeroen Verhegge, Wim De Clercq, Philippe De Smedt, Wouter H. Maes, Bente S. Majchczack, Immo Trinks, Dennis Wilken   +9 more
wiley   +1 more source

Vertical water velocities from underwater gliders [PDF]

, 2010
The underwater glider is set to become an important platform for oceanographers to gather data within oceans. Gliders are usually equipped with a conductivity/temperature/depth (CTD) sensor, but a wide range of other sensors has been fitted to gliders ...
Merckelbach, Lucas, Smeed, David, Griffiths, Gwyn   +2 more
core   +1 more source

Channel modeling for an underwater simultaneous wireless power and data transfer system with two coils

Results in Engineering
This article proposes a channel modeling methodology for simultaneous wireless power and data transfer (SWPDT) system in seawater environments, developing the channel gain function through analysis of LCC-LCC resonant circuits.
Bo Liang, Zhaoyong Mao, Bo Cheng, Zhengchao Yan, Shengzhao Pang, Yayu Ma, Jiale Wang   +6 more
doaj   +1 more source

Perovskite Photodetectors at the Intelligence Frontier: From Tunable Materials to Adaptive Optoelectronic Systems

Carbon Energy, EarlyView.
This comprehensive review presents a progressive roadmap for perovskite vision detectors. Centered on perovskite‐based artificial perception, the graphic illustrates a systematic evolution: starting with fundamental material engineering and device architectures, advancing toward complex functional strategies such as flexible neuromorphic imaging ...
Chenglong Li, Wei Qu, Deepak Kumar, Naini Jain, Nur Wardina Syahirah binti Mohamad Fadil, Nur Najiha binti Ahmad Rasid, Emannuel Kymakis, Maria Vasilopoulou, Chunxiong Bao, Feng Gao, Peng Gao, Sanjeev Kumar Sharma, Mohammad Khaja Nazeeruddin, Abd. Rashid bin Mohd Yusoff, Haotong Wei   +14 more
wiley   +1 more source

Applications of inverse simulation to a nonlinear model of an underwater vehicle [PDF]

, 2008
Inverse simulation provides an important alternative to conventional simulation and to more formal mathematical techniques of model inversion. The application of inverse simulation methods to a nonlinear dynamic model of an unmanned underwater ...
Murray-Smith, D., Lu, L., McGookin, E.
core