Results 31 to 40 of about 146,386 (253)

A Comprehensive Survey on Short-Distance Localization of UAVs

Drones
The localization of Unmanned Aerial Vehicles (UAVs) is a critical area of research, particularly in applications requiring high accuracy and reliability in Global Positioning System (GPS)-denied environments.
Luka Kramarić, Niko Jelušić, Tomislav Radišić, Mario Muštra   +3 more
doaj   +1 more source

Underwater source localization using time difference of arrival and frequency difference of arrival measurements based on an improved invasive weed optimization algorithm

IET Signal Processing, 2022
In this study, we propose an underwater localization method based on an improved invasive weed optimization algorithm to accurately locate moving sources in underwater sensor networks.
Yunhang Lin, Zhenkai Zhang, Hamid Esmaeili Najafabadi   +2 more
doaj   +1 more source

Improved Methods for UHF Localization of Partial Discharge in Air-Insulated Substations

Energies, 2023
A time-difference-of-arrival-based partial discharge (PD) location system that utilises prior knowledge of substation layout is presented. We propose a new time delay estimator that employs onset detection techniques and demonstrate, through experimental
Ahmed Rashwan, Alistair Reid
doaj   +1 more source

An Iterative Method for Moving Target Localization Using TDOA and FDOA Measurements

IEEE Access, 2018
For moving targets localization, incorporating frequency-difference-of-arrival (FDOA) measurements in the commonly used time-difference-of-arrival (TDOA) positioning systems will improve performance.
Yanbin Zou, Huaping Liu, Qun Wan
doaj   +1 more source

Review of Localization and Clustering in USV and AUV for Underwater Wireless Sensor Networks

Telecom, 2023
Oceanographic data collection, disaster prevention, aided navigation, critical observation sub-missions, contaminant screening, and seaward scanning are just a few of the submissions that use underwater sensor hubs.
Kaveripakam Sathish, Ravikumar Chinthaginjala Venkata, Rajesh Anbazhagan, Giovanni Pau   +3 more
doaj   +1 more source

Non-Line-of-Sight Ultraviolet Positioning via Time Difference of Arrival

IEEE Open Journal of the Communications Society
For challenging environments where conventional line-of-sight (LOS) systems are not available, we propose a novel non-line-of-sight (NLOS) ultraviolet (UV) positioning system based on time difference of arrival (TDOA).
Shihui Yu, Lingfeng Li, Yuchen Pan, Juliang Cao, Ruihang Yu, Chen Gong, Zhengyuan Xu   +6 more
doaj   +1 more source

Automatic Speaker Positioning in Meetings Based on YOLO and TDOA

Sensors, 2023
In recent years, many things have been held via video conferences due to the impact of the COVID-19 epidemic around the world. A webcam will be used in conjunction with a computer and the Internet.
Chen-Chiung Hsieh, Men-Ru Lu, Hsiao-Ting Tseng   +2 more
doaj   +1 more source

Sustained Therapeutic Efficacy of Intravenous Plasminogen Concentrate in Pediatric Patients With Type 1 Plasminogen Deficiency: An Analysis of Dosing Parameters and Clinical Outcomes

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Type 1 plasminogen deficiency (PLGD‐1) is an ultra‐rare autosomal recessive disorder caused by variants in the PLG gene and affects approximately 1.6 individuals per million. The condition is characterized by decreased plasminogen levels and impaired function, resulting in fibrin‐rich lesions on mucous membranes throughout the body.
Charles Nakar, Karen Thibaudeau, Mary Mathias, Heather McDaniel, Madlen Reschke, Klaus Tenbrock, Joseph M. Parker, Amy Shapiro   +7 more
wiley   +1 more source

Quaternion-Based Acoustic SLAM for 3D Drone Localization and Source Mapping

IEEE Open Journal of Signal Processing
Accurate localization and mapping are challenging in environments with poor visibility or noise interference, such as underwater, at night, or in fog, where visual data are unreliable or limited.
Hala Abualsaud, Peter Gerstoft
doaj   +1 more source

Time difference of arrival estimation of microseismic signals based on alpha-stable distribution [PDF]

Nonlinear Processes in Geophysics, 2018
Microseismic signals are generally considered to follow the Gauss distribution. A comparison of the dynamic characteristics of sample variance and the symmetry of microseismic signals with the signals which follow α-stable distribution reveals that ...
R.-S. Jia, R.-S. Jia, Y. Gong, Y. Gong, Y.-J. Peng, Y.-J. Peng, H.-M. Sun, H.-M. Sun, X.-L. Zhang, X.-L. Zhang, X.-M. Lu, X.-M. Lu   +11 more
doaj   +1 more source