Results 31 to 40 of about 1,734 (183)

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

Energy Storage Systems for Unmanned Underwater Vehicles

Underwater Technology, 2003
The power source of an underwater vehicle is the main component that determines its range of travel and the tasks that it can perform. Until recently, the choice of practical power sources for most applications has been limited to lead―acid and silver―zinc batteries are a well-established technology and are available at low cost. However, they have a
Abu-Sharkh, S.M., Griffiths, G.
openaire   +3 more sources

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

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

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

Investigating Pompeii Subsoil Using Geomatics and Geophysics Merged Analyses

Archaeological Prospection, EarlyView.
ABSTRACT The archaeological site of Pompeii represents an exceptional context for the application of non‐invasive and integrated investigation methods aimed at enhancing the understanding of both exposed and buried remains. This study presents the results of multidisciplinary research conducted in the Palestra Grande site, a large and strategically ...
Valentina Santoro, Antonio Merico, Vincenzo Sapia, Gianluca Catanzariti, Valerio Materni, Giacomo Patrucco, Riccardo Olivito, Anna Anguissola, Ilaria Cangiano, Antonia Spanò   +9 more
wiley   +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

Classifier-free guided diffusion for side-scan sonar: Joint data enhancement with attention mechanism

Defence Technology
Side Scan Sonar (SSS) is crucial for underwater environmental perception and indispensable for applications such as underwater target detection and topographic mapping.
Xin Wen, Chensheng Cheng, Zewen Wang, Zhengpeng Li, Feihu Zhang, Guang Pan   +5 more
doaj   +1 more source

An Integrated Numerical and Bollard Pull Evaluation Approach for Early‐Stage Resistance and Thrust Assessment of a Small Craft

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Early‐stage hydrodynamic assessment of slender multihull vessels is challenged by limited geometric maturity, uncertain propulsion integration, and strong sensitivity to operating conditions. Under such constraints, reliance on a single analytical or numerical method may lead to misleading design decisions due to oversimplification or ...
Chairat Napasaksri, Napat Intaraksa, Chalermkiat Nuchturee, Ramil Kesvarakul, Sarawuth Srinakaew   +4 more
wiley   +1 more source