Results 51 to 60 of about 12,770 (175)

Distributed localization of a RF target in NLOS environments

open access: yes, 2014
We propose a novel distributed expectation maximization (EM) method for non-cooperative RF device localization using a wireless sensor network. We consider the scenario where few or no sensors receive line-of-sight signals from the target. In the case of
Leng, Mei   +4 more
core   +1 more source

A General Bayesian Framework for Ellipse-based and Hyperbola-based Damage Localisation in Anisotropic Composite Plates [PDF]

open access: yes, 2015
This paper focuses on Bayesian Lamb wave-based damage localization in structural health monitoring of anisotropic composite materials. A Bayesian framework is applied to take account for uncertainties from experimental time-of-flight measurements and ...
FENDZI, Claude   +3 more
core   +3 more sources

Inferring activity patterns of aquatic animals from single‐receiver acoustic telemetry setups

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 12, Page 2931-2944, December 2025.
Abstract Acoustic telemetry has become an essential tool for studying activity patterns of animals in aquatic environments. Activity is typically recorded using transmitters with integrated sensors or dense receiver arrays for positional tracking. While effective, these approaches are financially and logistically expensive due to the need for advanced ...
Eneko Aspillaga   +5 more
wiley   +1 more source

Time-Difference-of-Arrival (TDoA) Based Wireless Indoor Localization Using an Effective Hybrid Time Synchronization

open access: yes, 2019
Wireless indoor localization is a major challenging issue for state-of-the-art technologies and applications which require precise and robust location information. Many restrictions affect the performance of the wireless indoor localization, for instance, intricate building architecture, decorated appliances inside the building, and inaccessibility and
Yuzana Hlaing, Nyein Aye Maung Maung
openaire   +1 more source

M‐SADR: Mobile Self Adaptive Data Rate for Enhanced LoRa End‐Device Connectivity on the Move

open access: yesInternational Journal of Communication Systems, Volume 38, Issue 15, October 2025.
The proposed M‐SADR method targets mobile LoRa end‐devices and achieves better performance, with a 2.4% improvement in packet delivery ratio and a 5.7% reduction in power consumption per successfully delivered packet. ABSTRACT Mobility is a critical aspect of the Internet of Things, reflecting the diverse and dynamic nature of potential applications ...
Vasileios Moysiadis   +6 more
wiley   +1 more source

Outbreak of Gigantic Jets Over an Isolated Thunderstorm in South China

open access: yesEarth and Space Science, Volume 12, Issue 10, October 2025.
Abstract On the evening of 18 August 2022, a sequence of five gigantic jets (GJs) were recorded within 7 min over an isolated coastal thunderstorm approximately 170 km to the southwest of Luoding County, Guangdong Province of China. The thunderstorm exhibited a higher −10°C isotherm altitude (500 m above average), a significant CAPE value (∼2,158 J/kg),
Yiwei Zhao   +10 more
wiley   +1 more source

Partial Discharge Localisation in Power Transformer by UHF Technique

open access: yesHigh Voltage, Volume 10, Issue 5, Page 1314-1323, October 2025.
ABSTRACT This article deals with the methods of finding partial discharge (PD) location in power transformers using ultra high frequency (UHF) measurements. The UHF technique utilises two methods to find the PD location, that is, the shortest path method and hyperbolic method.
Mohammad Amin Jangjoo   +3 more
wiley   +1 more source

Combined Evidence Reveals the Origin of a Rapid Range Expansion Despite Retained Genetic Diversity and a Weak Founder Effect

open access: yesMolecular Ecology, Volume 34, Issue 19, October 2025.
ABSTRACT Many species are currently experiencing range shifts in response to changing environmental conditions with potentially serious genetic consequences. Repeated founder events and strong genetic drift are expected to erode genetic variation at the range front, reducing adaptive potential and slowing or even halting the expansion.
Nora M. Bergman   +12 more
wiley   +1 more source

Improvement of the Time Difference of Arrival (TDOA) Estimation of GSM Signals Using Wavelets

open access: yes, 2000
Abstract : The problem of localization of wireless emitters (GSM based) using time difference of arrival (TDOA) techniques is studied. The wavelet transform and denoising techniques are used to increase the accuracy of the TDOA estimate. GSM like signals are simulated using the Hewlett-Packard Advanced Designs System (HP-ADS) software.
Tri T. Ha   +2 more
openaire   +3 more sources

Determining the Direction of Radio Wave Reception for Maximum Radiation Using Genetic Algorithm and RF to DC Conversion Efficiency Analysis

open access: yesEngineering Reports, Volume 7, Issue 9, September 2025.
In this study, a new plan for routing radio transmitters is presented using an algorithm compatible with RFEH. The proposed algorithm is based on the genetic algorithm (GA), and in an innovation, using the HPBW in the GA creates a population for initial sampling dependent on the receiver antenna.
S. Hosseini   +3 more
wiley   +1 more source

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