Results 41 to 50 of about 4,731 (309)
Analysis of Near-Capacity Iterative Decoding Schemes for Wireless Communication Using EXIT Charts
IEEE Access, 2020 This article proposes and compares the performance of three flexible and bandwidth efficient transceivers. The terminology of Over-Complete Mapping (OCM) is introduced in the first two schemes.
Nasru Minallah +6 more
doaj +1 more source
Sound absorbing properties of spiral metasurfaces inspired by micro-perforated plates
Theoretical and Applied Mechanics Letters, 2023 As a kind of classical low-frequency sound-absorbing material, the microperforated plate (MPP) has been widely used. Here, we inspired by the sound absorption mechanism of the MPP, a spiral metasurface (SM) is designed and the analytical solution of ...
Han Zhang +6 more
doaj +1 more source
On–Off Switchable Micromotors for Use in Steerable Microvehicles
Advanced Robotics Research, EarlyView.Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson +3 more
wiley +1 more source
Source localization in shallow ocean using a deep learning approach with range-dependent sound speed profile modeling [PDF]
JASA Express LettersModel-based deep learning approaches provide an alternative scheme to address the problem of the shortage of training data. However, performance degradation caused by sound speed profile (SSP) mismatch remains a critical challenge, particularly in ...
Jing Guo, Juan Zeng
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Underwater Acoustic Research Trends with Machine Learning: Ocean Parameter Inversion Applications
한국해양공학회지, 2020 Underwater acoustics, which is the study of the phenomena related to sound waves in water, has been applied mainly in research on the use of sound navigation and range (SONAR) systems for communication, target detection, investigation of marine resources
Haesang Yang +3 more
doaj +1 more source
Passive tracking in underwater acoustic [PDF]
Signal Processing, 2002 This paper provides a novel passive underwater acoustic method to track a moving object, called a source or target, with the following constraints: the sensor's location is fixed and imposed, and classical array processing techniques cannot be applied.
Bernard Xerri +2 more
openaire +1 more source
Information Transmission Strategies for Self‐Organized Robotic Aggregation
Advanced Robotics Research, EarlyView.In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng +5 more
wiley +1 more source
Journal of Marine Science and EngineeringThe frequency shift of multipath sound rays induced by the motion of a sound source in an ocean waveguide environment is a crucial factor affecting the detection capabilities of both active and passive sonar systems, as well as the quality of underwater ...
Zuoxiang Zhang +3 more
doaj +1 more source
Understanding Ocean Acoustics by Eigenray Analysis
Journal of Marine Science and Engineering, 2019 Acoustics is important for all underwater systems for object detection, classification, surveillance systems, and communication. However, underwater acoustics is often difficult to understand, and even the most carefully conducted measurements may often ...
Jens M. Hovem, Hefeng Dong
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Hard‐Magnetic Soft Millirobots in Underactuated Systems
Advanced Robotics Research, EarlyView.This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang +4 more
wiley +1 more source